commit ccfa358f97076e010d1e029ce2ddbd8c53f3cc81
Author: Claudecio Martins <claudecioj2@gmail.com>
Date:   Sun Oct 11 08:20:24 2026 -0300

    feat: initial commit - cybercore signer desktop agent

diff --git a/.agents/rules/main-rule.md b/.agents/rules/main-rule.md
new file mode 100644
index 0000000..9697813
--- /dev/null
+++ b/.agents/rules/main-rule.md
@@ -0,0 +1,250 @@
+---
+trigger: always_on
+---
+
+PROMPT MESTRE — CYBERCORE SIGNER
+
+Você é responsável pelo desenvolvimento do CyberCore Signer, um agente desktop Java para Windows que permite aplicações web autorizadas solicitar assinaturas digitais usando certificados instalados/localmente disponíveis na máquina do usuário.
+
+1. REGRA DE DESENVOLVIMENTO
+
+Siga sempre: ANALISAR → PLANEJAR → AUTORIZAR → IMPLEMENTAR → VALIDAR.
+
+Antes de alterar qualquer código, analise o repositório real, sua estrutura, dependências, configurações, padrões, documentação e testes. Não invente arquivos, classes ou arquitetura existentes.
+
+Na fase de análise, não altere o projeto. Depois apresente o plano e aguarde autorização explícita para implementar.
+
+Se durante a implementação surgir mudança relevante de escopo, pare e peça nova autorização.
+
+Ao finalizar, informe arquivos alterados/criados, dependências, decisões arquiteturais, testes executados, limitações e pendências.
+
+2. TECNOLOGIA
+
+Use Java 21+ LTS, Maven ou Gradle conforme o projeto, JavaFX para a interface e JCA/JCE para criptografia.
+
+Use X.509, KeyStore/PKCS12 e PKCS#11 conforme necessário. Use SunPKCS11 quando apropriado e Bouncy Castle somente quando houver necessidade real.
+
+O aplicativo deve ser empacotado com runtime próprio, preferencialmente via jpackage, sem exigir Java instalado pelo usuário.
+
+Windows 10/11 é o alvo inicial; mantenha a arquitetura preparada para macOS/Linux.
+
+3. ARQUITETURA
+
+Separe responsabilidades em módulos/componentes coerentes, sem criar módulos artificiais. A arquitetura deve permitir evolução e testes independentes.
+
+Crie abstrações para descoberta e uso de certificados, por exemplo CertificateProvider, com implementações para A1, Windows Certificate Store e PKCS#11 quando aplicável.
+
+CertificateManager deve centralizar descoberta, validade, subject, issuer, algoritmo, disponibilidade da chave privada e seleção do provider.
+
+SigningService deve executar a assinatura por JCA/JCE e providers; nunca implemente criptografia própria.
+
+Mantenha o núcleo independente de fabricantes.
+
+4. A1
+
+Suporte certificados .PFX/.P12.
+
+A chave privada permanece exclusivamente na máquina. A senha nunca deve ser enviada ao servidor nem aparecer em logs.
+
+Trate certificado válido, expirado, inválido, senha incorreta, ausência de chave privada e algoritmos não suportados.
+
+Se houver persistência de credenciais, use armazenamento seguro do sistema operacional.
+
+5. A3 / PKCS#11
+
+Suporte tokens USB, smart cards, leitores e middleware compatíveis com PKCS#11, além de cenários Windows CSP/CNG/KSP quando necessários.
+
+Detecte slots, tokens, certificados e chaves disponíveis.
+
+Trate token ausente/removido, middleware/provider indisponível, PIN requerido/incorreto, timeout e falhas do dispositivo.
+
+Nunca armazene ou envie PIN. Nunca implemente sua própria camada PKCS#11: utilize APIs/providers existentes.
+
+Não assuma que todos os A3 funcionam da mesma forma; use adapters/providers sem acoplar o núcleo a um fabricante.
+
+6. ASSINATURA
+
+Priorize o modelo em que a aplicação web calcula o digest e o CyberCore assina localmente apenas esse digest.
+
+Exemplo: documento → SHA-256 → digest → CyberCore → certificado A1/A3 → assinatura.
+
+A chave privada nunca sai da máquina.
+
+Valide algoritmo, tamanho/formato do digest, certificado e capacidade do provider antes da operação.
+
+7. PROTOCOLO CCSP
+
+Defina o CyberCore Signing Protocol (CCSP), versão inicial CCSP/1.
+
+Toda requisição deve possuir request_id UUID, application_id, operação, algoritmo, digest, indicação opcional do certificado e expiração.
+
+Exemplo:
+
+{
+ "version":"1","request_id":"uuid","application_id":"uuid",
+ "operation":"sign","algorithm":"SHA256withRSA",
+ "digest":"base64","certificate_hint":"uuid","expires_at":"..."
+}
+
+Resposta:
+
+{
+ "version":"1","request_id":"uuid","status":"signed",
+ "signature":"base64","certificate":"base64","algorithm":"SHA256withRSA"
+}
+
+Especifique em documentação autenticação, autorização, validação, timeouts, nonce, replay protection, erros e compatibilidade de versões.
+
+8. COMUNICAÇÃO LOCAL
+
+A comunicação deve ocorrer somente localmente por padrão. Avalie HTTPS localhost, WebSocket ou outro mecanismo adequado.
+
+Nunca exponha uma API de assinatura local sem autenticação/autorização.
+
+Não permita exposição involuntária à rede LAN.
+
+Use registro/autorização de aplicações, origem permitida, desafio/nonce, timestamp, expiração e proteção contra replay.
+
+Não confie exclusivamente em Origin ou User-Agent.
+
+9. SEGURANÇA
+
+A assinatura deve exigir confirmação explícita do usuário por padrão.
+
+Mostre aplicação solicitante, certificado, tipo A1/A3, algoritmo e informações relevantes antes de assinar.
+
+Nunca registre PIN, senha, chave privada ou conteúdo desnecessário do documento.
+
+Minimize dados trafegados e armazenados.
+
+Use UUIDs, correlação por request_id e validação rigorosa de entrada.
+
+10. INTERFACE
+
+Use JavaFX com aparência profissional e consistente.
+
+Inclua, conforme o escopo: Dashboard, Certificados, Solicitação de Assinatura, Configurações, Diagnóstico e Sobre.
+
+Suporte System Tray.
+
+A interface deve informar claramente estado do agente, certificados disponíveis, token conectado e erros acionáveis.
+
+11. DIAGNÓSTICO
+
+Disponibilize diagnóstico de Java/runtime, engine criptográfica, Windows Certificate Store, A1, A3, PKCS#11, comunicação local e SDK.
+
+Permita diagnóstico completo e teste de assinatura.
+
+Diferencie claramente falha de configuração, middleware, token, certificado, comunicação e aplicação solicitante.
+
+12. ERROS
+
+Utilize erros estruturados e estáveis, incluindo:
+
+CERTIFICATE_NOT_FOUND, CERTIFICATE_EXPIRED, CERTIFICATE_INVALID,
+PRIVATE_KEY_NOT_AVAILABLE, TOKEN_NOT_FOUND, TOKEN_REMOVED,
+PIN_REQUIRED, PIN_INCORRECT, PKCS11_ERROR, SIGNATURE_FAILED,
+APPLICATION_NOT_AUTHORIZED, REQUEST_EXPIRED, REPLAY_DETECTED,
+INVALID_ORIGIN, UNSUPPORTED_ALGORITHM, USER_CANCELLED,
+PROVIDER_NOT_AVAILABLE e COMMUNICATION_ERROR.
+
+Mensagens para o usuário devem ser claras, sem expor segredos ou detalhes internos desnecessários.
+
+13. LOGS E AUDITORIA
+
+Registre eventos relevantes: inicialização, descoberta de certificados, provider utilizado, aplicação, request_id, operação, sucesso/falha e remoção de token.
+
+Nunca registre PIN, senha, chave privada ou dados sensíveis desnecessários.
+
+Use níveis de log adequados e correlação por request_id.
+
+14. SDK WEB
+
+Planeje o pacote JavaScript @cybercore/signer-sdk.
+
+API mínima:
+
+connect(), isInstalled(), getVersion(), getStatus(),
+getCertificates(), getCapabilities(), sign(), verify().
+
+O SDK deve abstrair o CCSP e fornecer erros previsíveis para aplicações web.
+
+15. MULTIAPLICAÇÃO E CONCORRÊNCIA
+
+Uma única instalação deve atender múltiplas aplicações web autorizadas.
+
+Controle concorrência e fila de operações, especialmente em A3, pois tokens/middleware podem não suportar operações simultâneas.
+
+Nunca misture contexto ou autorização de uma aplicação com outra.
+
+16. PDF/PAdES
+
+Não misture a operação criptográfica básica com a montagem/finalização de PDF.
+
+Para PAdES, avalie bibliotecas maduras como Apache PDFBox, Bouncy Castle ou DSS.
+
+Nunca implemente manualmente mecanismos criptográficos ou estruturas complexas de assinatura PDF sem necessidade.
+
+17. TESTES
+
+Crie testes unitários, integração, segurança, protocolo, providers, comunicação local, SDK e concorrência.
+
+Cubra A1 válido/expirado/inválido/senha incorreta; A3 sem token, token removido, PIN incorreto, middleware indisponível e cancelamento; assinatura válida; algoritmo incompatível; requisição expirada/repetida/não autorizada; origem inválida; payload malformado e concorrência.
+
+Testes dependentes de hardware só podem ser declarados executados quando o hardware realmente estiver disponível.
+
+18. MODO DESENVOLVIMENTO
+
+Implemente mock quando útil para desenvolvimento e testes, simulando A1/A3, token removido, PIN incorreto, certificado expirado, provider indisponível, timeout e cancelamento.
+
+O modo deve ser claramente identificado como DESENVOLVIMENTO.
+
+Nunca apresente assinatura simulada como assinatura real.
+
+19. INSTALADOR E ATUALIZAÇÃO
+
+Crie instalador Windows com runtime próprio, instalação/desinstalação, atalhos e opções de inicialização quando aplicável.
+
+Atualizações devem ser autenticadas e seguras.
+
+Executáveis e instaladores devem ser preparados para code signing.
+
+20. PRIVACIDADE
+
+A chave privada, PIN e senha A1 permanecem na máquina.
+
+Quando apenas o digest for necessário, o documento não deve ser enviado ao CyberCore.
+
+Colete, armazene e registre somente o necessário para operação, diagnóstico e auditoria.
+
+21. DOCUMENTAÇÃO
+
+Mantenha documentação técnica em docs/.
+
+Documente especialmente docs/CCSP.md, arquitetura, instalação, certificados A1/A3, PKCS#11, segurança, SDK, erros, diagnóstico, desenvolvimento e limitações.
+
+Toda mudança relevante de protocolo ou arquitetura deve atualizar a documentação correspondente.
+
+22. IMPLEMENTAÇÃO
+
+Ao receber uma tarefa:
+
+1) ANALISE o projeto real e identifique impacto, dependências e riscos.
+2) PLANEJE a solução, apresentando arquivos/componentes afetados e estratégia de testes.
+3) PEÇA AUTORIZAÇÃO explícita antes de modificar o código.
+4) IMPLEMENTE seguindo os padrões existentes e evitando alterações fora do escopo.
+5) VALIDE com build, testes, análise de erros e, quando possível, execução real.
+
+Não marque uma tarefa como concluída apenas porque o código compila.
+
+23. REGRA FINAL
+
+Priorize segurança, interoperabilidade, rastreabilidade, manutenção e compatibilidade.
+
+Não invente suporte a certificados, tokens, providers, algoritmos ou hardware que não tenham sido realmente implementados/testados.
+
+Quando algo depender de fabricante, middleware, Windows ou hardware físico, declare a dependência.
+
+Princípio obrigatório:
+
+ANALISAR → PLANEJAR → AUTORIZAR → IMPLEMENTAR → VALIDAR.
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
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--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,80 @@
+# ==============================================================================
+# CyberCore Signer - .gitignore
+# ==============================================================================
+
+# Compilação e Artefatos Maven
+target/
+**/target/
+pom.xml.tag
+pom.xml.releaseBackup
+pom.xml.versionsBackup
+pom.xml.next
+release.properties
+dependency-reduced-pom.xml
+buildNumber.properties
+.mvn/timing.properties
+.mvn/wrapper/maven-wrapper.jar
+
+# Binários gerados e Distribuições Locais
+*.jar
+*.war
+*.ear
+*.zip
+dist/
+build/
+bin/
+
+# Certificados, Chaves e Credenciais Locais (Privacidade e Segurança)
+*.pfx
+*.p12
+*.jks
+*.keystore
+*.key
+*.pem
+*.cer
+*.crt
+*.der
+!assets/
+!docs/
+
+# Ambientes e Variáveis Locais
+.env
+.env.*
+!.env.example
+
+# IDEs e Editores
+.idea/
+*.iml
+*.ipr
+*.iws
+.vscode/
+*.code-workspace
+.project
+.classpath
+.settings/
+.factorypath
+bin/
+
+# Logs e Auditorias de Runtime Locais
+logs/
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Node / SDK de Testes
+node_modules/
+sdk/node_modules/
+coverage/
+.nyc_output/
+
+# Sistema Operacional
+.DS_Store
+Thumbs.db
+desktop.ini
+$RECYCLE.BIN/
+*.tmp
+*~
+
+# Arquivos temporários de Scratch locais
+scratch/temp/
diff --git a/.mvn/wrapper/maven-wrapper.properties b/.mvn/wrapper/maven-wrapper.properties
new file mode 100644
index 0000000..c0bcafe
--- /dev/null
+++ b/.mvn/wrapper/maven-wrapper.properties
@@ -0,0 +1,3 @@
+wrapperVersion=3.3.4
+distributionType=only-script
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.11/apache-maven-3.9.11-bin.zip
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..bae019f
--- /dev/null
+++ b/README.md
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+# CyberCore Signer
+
+> **Agente Desktop de Assinatura Digital e Autenticação Criptográfica (A1 / A3 / PKCS#11) para Windows e Linux.**
+
+O **CyberCore Signer** é uma solução desktop em Java 21 LTS com JavaFX que permite que aplicações web autorizadas solicitem assinaturas digitais, autenticação de sessão e carimbos do tempo utilizando certificados digitais ICP-Brasil (A1 em arquivo e A3 em tokens/smartcards físicos) instalados ou conectados na estação de trabalho do usuário.
+
+A comunicação local entre a página web e o agente utiliza o protocolo **CCSP (CyberCore Signing Protocol)** via HTTP/WebSocket localhost autenticado e seguro.
+
+---
+
+## 🏛 Arquitetura do Projeto
+
+O projeto é estruturado em módulos Maven:
+
+* **[modules/cybercore-core](modules/cybercore-core)**: Núcleo de regras criptográficas (JCA/JCE, SunPKCS11, X.509, PAdES, XMLDSig, carimbo de tempo TSA, LTV e validação de cadeias). Não possui dependência de interface gráfica.
+* **[modules/cybercore-ui](modules/cybercore-ui)**: Interface gráfica com o usuário construída em JavaFX (Dashboard, Gerenciador de Certificados, Diagnóstico Criptográfico, Diálogo de Confirmação de Assinatura, PIN dialog e System Tray).
+* **[modules/cybercore-app](modules/cybercore-app)**: Ponto de entrada da aplicação (`CyberCoreApp`), orquestrador dos serviços de ciclo de vida e servidor CCSP local.
+* **[sdk/](sdk)**: SDK JavaScript oficial (`@cybercore/signer-sdk`) para integração de aplicações web com o agente desktop.
+* **[docs/](docs)**: Documentação técnica detalhada de arquitetura, protocolo, segurança e casos de uso.
+
+---
+
+## 🚀 Requisitos
+
+* **Java Development Kit (JDK):** Versão 21+ LTS (OpenJDK, Temurin, Corretto, etc.).
+* **Maven:** 3.9+ (ou utilizar o wrapper `./mvnw` incluído no projeto).
+* **Sistema Operacional Alvo:** Windows 10/11 ou Linux (x86_64).
+
+---
+
+## 🛠 Compilação e Empacotamento
+
+### 1. Compilação do JAR Executável
+
+Para compilar e gerar o JAR consolidado (com todas as dependências sombreadas e assets):
+
+```bash
+./build-jar.sh
+```
+
+Ou diretamente via Maven:
+
+```bash
+./mvnw clean package -DskipTests
+```
+
+O artefato consolidado será gerado em:
+`modules/cybercore-app/target/cybercore-signer.jar`
+
+### 2. Execução Local
+
+Para iniciar o agente em ambiente de desenvolvimento:
+
+```bash
+# No Linux / macOS:
+./run.sh
+
+# No Windows:
+run.bat
+```
+
+### 3. Empacotamento com Runtime Nativo (`jpackage`)
+
+Para criar a distribuição com Java Runtime embutido (sem exigir JDK pré-instalado pelo usuário final):
+
+```bash
+./scripts/package-jpackage.sh
+```
+
+---
+
+## 🔒 Princípios de Segurança e Privacidade
+
+1. **Chave Privada Preservada:** A chave privada e os segredos (PIN de token A3 e senha de certificado A1) nunca saem da máquina do usuário nem trafegam pela rede.
+2. **Assinatura por Digest:** Por padrão, a aplicação web calcula o hash/digest (ex: SHA-256) do documento e o CyberCore assina localmente apenas o digest, minimizando o tráfego de dados sensíveis.
+3. **Confirmação Explícita:** Toda operação de assinatura exige consentimento e autorização visual do usuário antes da aplicação da chave.
+4. **Isolamento de Origem e CCSP:** O agente atende apenas origens web autorizadas, protegendo contra abusos via CSRF ou requisições locais não autenticadas.
+
+---
+
+## 📚 Documentação Técnica
+
+Consulte a pasta [docs/](docs) para especificações completas:
+
+* [Protocolo CCSP (CyberCore Signing Protocol)](docs/CCSP.md)
+* [Arquitetura e Fluxo do Sistema](docs/architecture.md)
+* [Certificados A1 e A3 (PKCS#11 / MSCAPI)](docs/a1-a3-certificates.md)
+* [Assinatura de Documentos PDF (PAdES / LTV / TSA)](docs/pades.md)
+* [Assinatura de Documentos XML (XMLDSig)](docs/xml-xmldsig.md)
+* [Autenticação e Sessão Criptográfica](docs/authentication-login.md)
+* [Diagnóstico e Resolução de Problemas](docs/diagnostics.md)
+* [Segurança e Tratamento de Erros](docs/security.md)
+* [SDK Web JavaScript](docs/sdk.md)
+* [Guia de Instalação](docs/installation.md)
+
+---
+
+## 📄 Licença
+
+Propriedade de **CyberCore Systems**. Todos os direitos reservados.
diff --git a/assets/README.md b/assets/README.md
new file mode 100644
index 0000000..d77f68b
--- /dev/null
+++ b/assets/README.md
@@ -0,0 +1,75 @@
+# Pasta de Ícones (SVG) e Imagens (PNG) — CyberCore Signer
+
+Esta pasta é o repositório oficial onde você pode visualizar, customizar e substituir livremente os **ícones em SVG** e as **imagens em PNG** do **CyberCore Signer**.
+
+---
+
+## 📁 Estrutura de Arquivos Criados
+
+```
+assets/
+├── icons/                     # Ícones vetoriais SVG reais e editáveis (W3C padrão)
+│   ├── pdf.svg                # Ícone Assinar PDF (documento com tag vermelha PDF)
+│   ├── xml.svg                # Ícone Assinar XML (documento com tag azul <XML>)
+│   ├── file.svg               # Ícone Assinar Arquivo (documento com caneta)
+│   ├── batch.svg              # Ícone Assinatura em Lote (pilha de documentos com check)
+│   ├── attached.svg           # Ícone Assinatura Atachada (documento com clipe de papel)
+│   ├── co-sign.svg            # Ícone Co-Assinar (documentos duplos com usuários)
+│   ├── timestamp.svg          # Ícone Carimbo do Tempo (documento com relógio TSA)
+│   ├── ltv.svg                # Ícone Assinatura LTV (documento com selo perpétuo)
+│   ├── validate.svg           # Ícone Validar Assinatura (documento com checkmark verde)
+│   ├── validate-timestamp.svg # Ícone Validar Carimbo (relógio com checkmark verde)
+│   ├── exit.svg               # Ícone Sair do Agente (porta com seta vermelha de saída)
+│   ├── logs.svg               # Ícone Terminal de Logs (janela com prompt </>)
+│   ├── settings.svg           # Ícone Configurações (engrenagem de precisão de 8 dentes)
+│   ├── tutorial.svg           # Ícone Tutorial e Ajuda (monitor com vídeo/play)
+│   ├── cert.svg               # Ícone Certificados Digitais (pasta com cadeado seguro)
+│   ├── about.svg              # Ícone Sobre o Sistema (círculo azul com 'i')
+│   ├── sun.svg                # Ícone Tema Claro (sol dourado com raios vetoriais)
+│   ├── moon.svg               # Ícone Tema Escuro (lua crescente azul/índigo)
+│   ├── shield.svg             # Ícone Brasão de Segurança (CyberShield com chave interna)
+│   ├── seal.svg               # Ícone Designer e Gerenciador de Selos Notariais
+│   ├── check.svg              # Ícone Checkmark de sucesso e validação
+│   ├── error.svg              # Ícone de Erro / Alerta em vermelho
+│   └── star.svg               # Ícone de Estrela notarial / favorita
+│
+└── images/                    # Imagens de alta fidelidade em PNG com canal alfa (transparência)
+    ├── app-icon.png           # Ícone oficial do app (256x256 px - Diamante 3D azul Serpro)
+    ├── app-logo.png           # Logotipo horizontal oficial (480x120 px - CyberCore SIGNER)
+    ├── brand-banner.png       # Banner de cabeçalho e marca (600x160 px - Serpro Blue)
+    └── default-seal.png       # Selo de assinatura padrão ICP-Brasil (640x164 px)
+```
+
+---
+
+## 🎨 Como Customizar Qualquer Ícone ou Imagem
+
+1. **Ícones:** 
+   - Estão no formato `.svg` padrão.
+   - Podem ser editados diretamente no seu editor de código (VS Code, etc.) ou em editores vetoriais como **Inkscape, Figma ou Illustrator**.
+   - Se preferir colocar uma imagem bitmap para um ícone específico, você também pode colocar um `.png` (ex: `pdf.png`). O sistema prioriza `.svg` e aceita `.png` com fallback transparente.
+
+2. **Imagens do Sistema:**
+   - Estão no formato `.png` com canal alfa de 32 bits (fundo transparente).
+   - Você pode substituir `app-logo.png`, `app-icon.png`, `brand-banner.png` ou `default-seal.png` pelo logotipo e identidade visual da sua instituição ou empresa.
+
+3. **Ordem de Prioridade e Hot-Reloading:**
+   Quando a aplicação busca um ícone ou imagem, a resolução ocorre na ordem:
+   1. **Pasta Física Local (`./assets/icons/` e `./assets/images/`)**: Qualquer alteração feita aqui entra em vigor imediatamente ao abrir a janela ou reiniciar a aplicação, sem necessidade de recompilar!
+   2. **Pasta do Usuário (`~/.cybercore/assets/`)**: Configurações específicas por usuário do sistema operacional.
+   3. **Resources Empacotados no JAR (`/assets/`)**: Cópia empacotada internamente no `.jar`.
+   4. **Fallback Vetorial Nativo (`SvgIcons`)**: Garantia de que a interface nunca fique em branco caso algum arquivo seja excluído.
+
+---
+
+## 🚀 Como Testar Suas Modificações
+
+Para compilar e gerar o pacote `.jar` completo com todos os novos assets embutidos:
+```bash
+./build-jar.sh
+```
+
+Para rodar a aplicação:
+```bash
+java -jar ./cybercore-signer.jar
+```
diff --git a/assets/icons/about.svg b/assets/icons/about.svg
new file mode 100644
index 0000000..f7cc7f1
--- /dev/null
+++ b/assets/icons/about.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 16 16"><title>info-circle-fill</title><path fill="currentColor" d="M8 16A8 8 0 1 0 8 0a8 8 0 0 0 0 16m.93-9.412l-1 4.705c-.07.34.029.533.304.533c.194 0 .487-.07.686-.246l-.088.416c-.287.346-.92.598-1.465.598c-.703 0-1.002-.422-.808-1.319l.738-3.468c.064-.293.006-.399-.287-.47l-.451-.081l.082-.381l2.29-.287zM8 5.5a1 1 0 1 1 0-2a1 1 0 0 1 0 2"/></svg>
\ No newline at end of file
diff --git a/assets/icons/attached.svg b/assets/icons/attached.svg
new file mode 100644
index 0000000..7d894e7
--- /dev/null
+++ b/assets/icons/attached.svg
@@ -0,0 +1,12 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Folha de documento com dobra -->
+  <path d="M 10 4 L 34 4 L 42 12 L 42 44 L 10 44 Z" fill="#ffffff" stroke="#0288d1" stroke-width="2.5" stroke-linejoin="round"/>
+  <path d="M 34 4 L 34 12 L 42 12 Z" fill="#b3e5fc" stroke="#0288d1" stroke-width="2"/>
+  <!-- Linhas de texto representativas -->
+  <line x1="16" y1="20" x2="36" y2="20" stroke="#90caf9" stroke-width="2" stroke-linecap="round"/>
+  <line x1="16" y1="26" x2="36" y2="26" stroke="#90caf9" stroke-width="2" stroke-linecap="round"/>
+  <line x1="16" y1="32" x2="30" y2="32" stroke="#90caf9" stroke-width="2" stroke-linecap="round"/>
+  <!-- Clipe de papel metálico prendendo a folha -->
+  <path d="M 12 2 C 8 2 6 5 6 9 L 6 25 C 6 29 9 32 14 32 C 18 32 21 29 21 25 L 21 11 C 21 8 19 6 16 6 C 13 6 12 8 12 11 L 12 24"
+        fill="none" stroke="#455a64" stroke-width="2.8" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>
diff --git a/assets/icons/batch.svg b/assets/icons/batch.svg
new file mode 100644
index 0000000..5ced311
--- /dev/null
+++ b/assets/icons/batch.svg
@@ -0,0 +1,13 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Folha traseira (3) -->
+  <path d="M 16 4 L 38 4 L 44 10 L 44 32 L 16 32 Z" fill="#e1f5fe" stroke="#4fc3f7" stroke-width="2" stroke-linejoin="round"/>
+  <!-- Folha do meio (2) -->
+  <path d="M 10 10 L 32 10 L 38 16 L 38 38 L 10 38 Z" fill="#b3e5fc" stroke="#0288d1" stroke-width="2" stroke-linejoin="round"/>
+  <!-- Folha frontal (1) -->
+  <path d="M 4 16 L 26 16 L 32 22 L 32 44 L 4 44 Z" fill="#ffffff" stroke="#01579b" stroke-width="2.2" stroke-linejoin="round"/>
+  <!-- Dobra folha frontal -->
+  <path d="M 26 16 L 26 22 L 32 22 Z" fill="#e1f5fe" stroke="#01579b" stroke-width="1.8"/>
+  <!-- Checkmark de execução/lote concluído -->
+  <circle cx="34" cy="34" r="10" fill="#00c853"/>
+  <path d="M 29 34 L 33 38 L 39 30" fill="none" stroke="#ffffff" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>
diff --git a/assets/icons/cert.svg b/assets/icons/cert.svg
new file mode 100644
index 0000000..14cc2b4
--- /dev/null
+++ b/assets/icons/cert.svg
@@ -0,0 +1,11 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Pasta de arquivos de certificados -->
+  <path d="M 4 10 L 16 10 L 20 14 L 44 14 L 44 40 L 4 40 Z" fill="#e1f5fe" stroke="#0288d1" stroke-width="2.5" stroke-linejoin="round"/>
+  <!-- Aba superior da pasta -->
+  <path d="M 4 18 L 44 18" stroke="#0288d1" stroke-width="2"/>
+  <!-- Cadeado de segurança dourado/azul -->
+  <rect x="26" y="24" width="14" height="12" rx="3" fill="#0288d1"/>
+  <!-- Arco do cadeado -->
+  <path d="M 29 24 L 29 20 C 29 17 31 15 33 15 C 35 15 37 17 37 20 L 37 24" fill="none" stroke="#01579b" stroke-width="2.5"/>
+  <circle cx="33" cy="30" r="1.8" fill="#ffffff"/>
+</svg>
diff --git a/assets/icons/check.svg b/assets/icons/check.svg
new file mode 100644
index 0000000..c379af0
--- /dev/null
+++ b/assets/icons/check.svg
@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <circle cx="24" cy="24" r="20" fill="#10b981"/>
+  <path d="M 14 24 L 21 31 L 34 17" fill="none" stroke="#ffffff" stroke-width="4.5" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>
diff --git a/assets/icons/co-sign.svg b/assets/icons/co-sign.svg
new file mode 100644
index 0000000..283c24f
--- /dev/null
+++ b/assets/icons/co-sign.svg
@@ -0,0 +1,12 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Folha secundária -->
+  <path d="M 6 10 L 26 10 L 32 16 L 32 40 L 6 40 Z" fill="#ffffff" stroke="#1976d2" stroke-width="2.2" stroke-linejoin="round"/>
+  <!-- Folha primária -->
+  <path d="M 16 4 L 36 4 L 42 10 L 42 34 L 16 34 Z" fill="#e3f2fd" stroke="#0288d1" stroke-width="2.2" stroke-linejoin="round"/>
+  <path d="M 36 4 L 36 10 L 42 10 Z" fill="#bbdefb" stroke="#0288d1" stroke-width="1.8"/>
+  <!-- Ícone de dois usuários / parceiros de assinatura -->
+  <circle cx="16" cy="24" r="4" fill="#0d47a1"/>
+  <path d="M 10 36 C 10 31 13 30 16 30 C 19 30 22 31 22 36 Z" fill="#0d47a1"/>
+  <circle cx="26" cy="22" r="3.5" fill="#0288d1"/>
+  <path d="M 21 34 C 21 30 24 29 26 29 C 29 29 32 30 32 34 Z" fill="#0288d1"/>
+</svg>
diff --git a/assets/icons/error.svg b/assets/icons/error.svg
new file mode 100644
index 0000000..5a36ff3
--- /dev/null
+++ b/assets/icons/error.svg
@@ -0,0 +1,5 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <circle cx="24" cy="24" r="20" fill="#ef4444"/>
+  <line x1="16" y1="16" x2="32" y2="32" stroke="#ffffff" stroke-width="4.5" stroke-linecap="round"/>
+  <line x1="32" y1="16" x2="16" y2="32" stroke="#ffffff" stroke-width="4.5" stroke-linecap="round"/>
+</svg>
diff --git a/assets/icons/exit.svg b/assets/icons/exit.svg
new file mode 100644
index 0000000..d209a6b
--- /dev/null
+++ b/assets/icons/exit.svg
@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Porta de saída / batente -->
+  <path d="M 24 8 L 12 8 C 9.8 8 8 9.8 8 12 L 8 36 C 8 38.2 9.8 40 12 40 L 24 40" 
+        fill="none" stroke="#546e7a" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"/>
+  <!-- Seta vermelha apontando para fora -->
+  <line x1="18" y1="24" x2="40" y2="24" stroke="#d32f2f" stroke-width="3.2" stroke-linecap="round"/>
+  <polyline points="32 16, 40 24, 32 32" fill="none" stroke="#d32f2f" stroke-width="3.2" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>
diff --git a/assets/icons/file.svg b/assets/icons/file.svg
new file mode 100644
index 0000000..023885f
--- /dev/null
+++ b/assets/icons/file.svg
@@ -0,0 +1,13 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Folha de documento com dobra -->
+  <path d="M 8 4 L 32 4 L 42 14 L 42 44 L 8 44 Z" fill="#ffffff" stroke="#0288d1" stroke-width="2.5" stroke-linejoin="round"/>
+  <!-- Dobra de canto -->
+  <path d="M 32 4 L 32 14 L 42 14 Z" fill="#b3e5fc" stroke="#0288d1" stroke-width="2" stroke-linejoin="round"/>
+  <!-- Linhas de texto representativas -->
+  <line x1="14" y1="20" x2="34" y2="20" stroke="#cfd8dc" stroke-width="2" stroke-linecap="round"/>
+  <line x1="14" y1="26" x2="34" y2="26" stroke="#cfd8dc" stroke-width="2" stroke-linecap="round"/>
+  <!-- Caneta / Pena de assinatura eletrônica -->
+  <path d="M 16 38 L 30 24 L 35 29 L 21 43 L 14 44 Z" fill="#0288d1"/>
+  <path d="M 30 24 L 34 20 L 39 25 L 35 29 Z" fill="#01579b"/>
+  <circle cx="16" cy="42" r="1.5" fill="#ffffff"/>
+</svg>
diff --git a/assets/icons/logs.svg b/assets/icons/logs.svg
new file mode 100644
index 0000000..0dd89e3
--- /dev/null
+++ b/assets/icons/logs.svg
@@ -0,0 +1,13 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Janela de terminal / console -->
+  <rect x="4" y="6" width="40" height="36" rx="6" fill="#1e293b" stroke="#334155" stroke-width="2"/>
+  <!-- Barra de título do terminal com botões -->
+  <circle cx="10" cy="12" r="2" fill="#ef4444"/>
+  <circle cx="16" cy="12" r="2" fill="#f59e0b"/>
+  <circle cx="22" cy="12" r="2" fill="#10b981"/>
+  <!-- Linha divisória -->
+  <line x1="4" y1="18" x2="44" y2="18" stroke="#334155" stroke-width="1.5"/>
+  <!-- Texto e prompt de código </> -->
+  <path d="M 12 24 L 18 29 L 12 34" fill="none" stroke="#38bdf8" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"/>
+  <line x1="22" y1="34" x2="32" y2="34" stroke="#94a3b8" stroke-width="2.5" stroke-linecap="round"/>
+</svg>
diff --git a/assets/icons/ltv.svg b/assets/icons/ltv.svg
new file mode 100644
index 0000000..dbc162a
--- /dev/null
+++ b/assets/icons/ltv.svg
@@ -0,0 +1,11 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Folha de documento com dobra -->
+  <path d="M 8 4 L 30 4 L 38 12 L 38 34 L 8 34 Z" fill="#ffffff" stroke="#00838f" stroke-width="2.5" stroke-linejoin="round"/>
+  <path d="M 30 4 L 30 12 L 38 12 Z" fill="#b2dfdb" stroke="#00838f" stroke-width="2"/>
+  <!-- Linhas no documento -->
+  <line x1="14" y1="18" x2="30" y2="18" stroke="#cfd8dc" stroke-width="2" stroke-linecap="round"/>
+  <line x1="14" y1="24" x2="24" y2="24" stroke="#cfd8dc" stroke-width="2" stroke-linecap="round"/>
+  <!-- Selo LTV com fita de proteção permanente -->
+  <circle cx="32" cy="32" r="12" fill="#e0f2f1" stroke="#00897b" stroke-width="2.5"/>
+  <text x="32" y="36.5" font-family="Segoe UI, Arial, sans-serif" font-size="9" font-weight="bold" fill="#00695c" text-anchor="middle">LTV</text>
+</svg>
diff --git a/assets/icons/moon.svg b/assets/icons/moon.svg
new file mode 100644
index 0000000..fd47105
--- /dev/null
+++ b/assets/icons/moon.svg
@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Lua crescente ciano/índigo -->
+  <path d="M 40 26.5 A 18 18 0 1 1 21.5 8 A 14 14 0 0 0 40 26.5 Z" fill="#38bdf8"/>
+  <circle cx="36" cy="12" r="1.5" fill="#818cf8"/>
+  <circle cx="42" cy="18" r="1" fill="#818cf8"/>
+</svg>
diff --git a/assets/icons/pdf.svg b/assets/icons/pdf.svg
new file mode 100644
index 0000000..3755ded
--- /dev/null
+++ b/assets/icons/pdf.svg
@@ -0,0 +1,13 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Folha de documento com dobra -->
+  <path d="M 8 4 L 32 4 L 42 14 L 42 44 L 8 44 Z" fill="#ffffff" stroke="#d32f2f" stroke-width="2.5" stroke-linejoin="round"/>
+  <!-- Dobra de canto -->
+  <path d="M 32 4 L 32 14 L 42 14 Z" fill="#ffcdd2" stroke="#d32f2f" stroke-width="2" stroke-linejoin="round"/>
+  <!-- Linhas de texto representativas -->
+  <line x1="14" y1="20" x2="28" y2="20" stroke="#b0bec5" stroke-width="2" stroke-linecap="round"/>
+  <line x1="14" y1="25" x2="36" y2="25" stroke="#b0bec5" stroke-width="2" stroke-linecap="round"/>
+  <line x1="14" y1="30" x2="36" y2="30" stroke="#b0bec5" stroke-width="2" stroke-linecap="round"/>
+  <!-- Etiqueta vermelha com sigla PDF -->
+  <rect x="12" y="33" width="24" height="11" rx="3" fill="#e53935"/>
+  <text x="24" y="41.5" font-family="Segoe UI, Arial, sans-serif" font-size="8.5" font-weight="bold" fill="#ffffff" text-anchor="middle">PDF</text>
+</svg>
diff --git a/assets/icons/seal.svg b/assets/icons/seal.svg
new file mode 100644
index 0000000..1aa3a5f
--- /dev/null
+++ b/assets/icons/seal.svg
@@ -0,0 +1,11 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Fita pendente do selo -->
+  <polygon points="18,30 24,44 30,30" fill="#f59e0b"/>
+  <polygon points="12,30 16,42 20,30" fill="#d97706"/>
+  <polygon points="28,30 32,42 36,30" fill="#d97706"/>
+  <!-- Medalha / Selo circular -->
+  <circle cx="24" cy="20" r="16" fill="#d97706" stroke="#fbbf24" stroke-width="2.5"/>
+  <circle cx="24" cy="20" r="13" fill="none" stroke="#fbbf24" stroke-width="1.2" stroke-dasharray="2,2"/>
+  <!-- Estrela de 5 pontas central -->
+  <polygon points="24,9 26.5,16.5 34,16.5 28,21 30.5,28.5 24,24 17.5,28.5 20,21 14,16.5 21.5,16.5" fill="#ffffff"/>
+</svg>
diff --git a/assets/icons/settings.svg b/assets/icons/settings.svg
new file mode 100644
index 0000000..e0f4042
--- /dev/null
+++ b/assets/icons/settings.svg
@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Engrenagem simétrica de 8 dentes centrada em (24, 24) -->
+  <path d="M 21 4 L 27 4 L 28 10 C 30 10.8 31.8 11.8 33.4 13.2 L 39 10 L 43 14 L 39.8 19.6 C 41.2 21.2 42.2 23 43 25 L 49 26 L 49 32 L 43 33 C 42.2 35 41.2 36.8 39.8 38.4 L 43 44 L 39 48 L 33.4 44.8 C 31.8 46.2 30 47.2 28 48 L 27 54 L 21 54 L 20 48 C 18 47.2 16.2 46.2 14.6 44.8 L 9 48 L 5 44 L 8.2 38.4 C 6.8 36.8 5.8 35 5 33 L -1 32 L -1 26 L 5 25 C 5.8 23 6.8 21.2 8.2 19.6 L 5 14 L 9 10 L 14.6 13.2 C 16.2 11.8 18 10.8 20 10 Z" transform="scale(0.8) translate(6, 4)" fill="#0288d1"/>
+  <!-- Círculo externo da engrenagem -->
+  <circle cx="24" cy="24" r="14" fill="#0288d1"/>
+  <!-- Furo central vazado -->
+  <circle cx="24" cy="24" r="6" fill="#ffffff"/>
+</svg>
diff --git a/assets/icons/shield.svg b/assets/icons/shield.svg
new file mode 100644
index 0000000..1bc2539
--- /dev/null
+++ b/assets/icons/shield.svg
@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Escudo CyberShield -->
+  <path d="M 24 4 L 8 11 L 8 24 C 8 34.5 15 42.5 24 45 C 33 42.5 40 34.5 40 24 L 40 11 Z" fill="#0284c7" stroke="#38bdf8" stroke-width="2.5" stroke-linejoin="round"/>
+  <!-- Chave de segurança criptográfica no centro -->
+  <path d="M 24 14 C 20.7 14 18 16.7 18 20 C 18 22.4 19.5 24.5 22 25.4 L 22 34 L 26 34 L 26 30 L 28 30 L 28 27 L 26 27 L 26 25.4 C 28.5 24.5 30 22.4 30 20 C 30 16.7 27.3 14 24 14 Z M 24 18 C 25.1 18 26 18.9 26 20 C 26 21.1 25.1 22 24 22 C 22.9 22 22 21.1 22 20 C 22 18.9 22.9 18 24 18 Z" fill="#ffffff"/>
+</svg>
diff --git a/assets/icons/star.svg b/assets/icons/star.svg
new file mode 100644
index 0000000..ac2213a
--- /dev/null
+++ b/assets/icons/star.svg
@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <polygon points="24,4 29.5,16.5 43,17.5 32.5,26.5 35.8,40 24,32.5 12.2,40 15.5,26.5 5,17.5 18.5,16.5" 
+           fill="#f59e0b" stroke="#d97706" stroke-width="2" stroke-linejoin="round"/>
+</svg>
diff --git a/assets/icons/sun.svg b/assets/icons/sun.svg
new file mode 100644
index 0000000..0327476
--- /dev/null
+++ b/assets/icons/sun.svg
@@ -0,0 +1,15 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Núcleo solar brilhante -->
+  <circle cx="24" cy="24" r="10" fill="#f59e0b"/>
+  <!-- Raios solares -->
+  <g stroke="#f59e0b" stroke-width="3" stroke-linecap="round">
+    <line x1="24" y1="4" x2="24" y2="9"/>
+    <line x1="24" y1="39" x2="24" y2="44"/>
+    <line x1="4" y1="24" x2="9" y2="24"/>
+    <line x1="39" y1="24" x2="44" y2="24"/>
+    <line x1="9.8" y1="9.8" x2="13.3" y2="13.3"/>
+    <line x1="34.7" y1="34.7" x2="38.2" y2="38.2"/>
+    <line x1="9.8" y1="38.2" x2="13.3" y2="34.7"/>
+    <line x1="34.7" y1="13.3" x2="38.2" y2="9.8"/>
+  </g>
+</svg>
diff --git a/assets/icons/timestamp.svg b/assets/icons/timestamp.svg
new file mode 100644
index 0000000..16238f4
--- /dev/null
+++ b/assets/icons/timestamp.svg
@@ -0,0 +1,13 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Folha de documento com dobra -->
+  <path d="M 8 4 L 30 4 L 38 12 L 38 34 L 8 34 Z" fill="#ffffff" stroke="#0288d1" stroke-width="2.5" stroke-linejoin="round"/>
+  <path d="M 30 4 L 30 12 L 38 12 Z" fill="#b3e5fc" stroke="#0288d1" stroke-width="2"/>
+  <!-- Linhas no documento -->
+  <line x1="14" y1="18" x2="30" y2="18" stroke="#cfd8dc" stroke-width="2" stroke-linecap="round"/>
+  <line x1="14" y1="24" x2="24" y2="24" stroke="#cfd8dc" stroke-width="2" stroke-linecap="round"/>
+  <!-- Relógio de precisão temporal TSA -->
+  <circle cx="32" cy="32" r="12" fill="#e1f5fe" stroke="#0288d1" stroke-width="2.5"/>
+  <circle cx="32" cy="32" r="2" fill="#01579b"/>
+  <line x1="32" y1="24" x2="32" y2="32" stroke="#01579b" stroke-width="2.5" stroke-linecap="round"/>
+  <line x1="32" y1="32" x2="38" y2="32" stroke="#01579b" stroke-width="2.5" stroke-linecap="round"/>
+</svg>
diff --git a/assets/icons/tutorial.svg b/assets/icons/tutorial.svg
new file mode 100644
index 0000000..32d13d2
--- /dev/null
+++ b/assets/icons/tutorial.svg
@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Monitor de computador -->
+  <rect x="4" y="6" width="40" height="28" rx="4" fill="#ffffff" stroke="#0288d1" stroke-width="2.5"/>
+  <!-- Base do monitor -->
+  <path d="M 16 34 L 12 42 L 36 42 L 32 34" fill="none" stroke="#0288d1" stroke-width="2.5" stroke-linejoin="round"/>
+  <!-- Ícone de play/vídeo tutorial central -->
+  <polygon points="20,14 32,20 20,26" fill="#0288d1"/>
+</svg>
diff --git a/assets/icons/validate-timestamp.svg b/assets/icons/validate-timestamp.svg
new file mode 100644
index 0000000..dc0f7c8
--- /dev/null
+++ b/assets/icons/validate-timestamp.svg
@@ -0,0 +1,10 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Círculo de relógio base -->
+  <circle cx="24" cy="24" r="20" fill="#f1f8e9" stroke="#558b2f" stroke-width="2.5"/>
+  <!-- Ponteiros do relógio -->
+  <line x1="24" y1="12" x2="24" y2="24" stroke="#33691e" stroke-width="2" stroke-linecap="round"/>
+  <line x1="24" y1="24" x2="32" y2="24" stroke="#33691e" stroke-width="2" stroke-linecap="round"/>
+  <!-- Checkmark verde de validação de tempo -->
+  <circle cx="34" cy="34" r="10" fill="#2e7d32"/>
+  <path d="M 29 34 L 33 38 L 39 30" fill="none" stroke="#ffffff" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>
diff --git a/assets/icons/validate.svg b/assets/icons/validate.svg
new file mode 100644
index 0000000..f654ce8
--- /dev/null
+++ b/assets/icons/validate.svg
@@ -0,0 +1,11 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Folha de documento com dobra -->
+  <path d="M 8 4 L 32 4 L 42 14 L 42 44 L 8 44 Z" fill="#ffffff" stroke="#0288d1" stroke-width="2.5" stroke-linejoin="round"/>
+  <path d="M 32 4 L 32 14 L 42 14 Z" fill="#b3e5fc" stroke="#0288d1" stroke-width="2"/>
+  <!-- Linhas no documento -->
+  <line x1="14" y1="20" x2="34" y2="20" stroke="#cfd8dc" stroke-width="2" stroke-linecap="round"/>
+  <line x1="14" y1="26" x2="28" y2="26" stroke="#cfd8dc" stroke-width="2" stroke-linecap="round"/>
+  <!-- Emblema de validação com Checkmark verde -->
+  <circle cx="30" cy="34" r="11" fill="#e8f5e9" stroke="#2e7d32" stroke-width="2.5"/>
+  <path d="M 24 34 L 28 38 L 36 29" fill="none" stroke="#2e7d32" stroke-width="3.2" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>
diff --git a/assets/icons/xml.svg b/assets/icons/xml.svg
new file mode 100644
index 0000000..edbf6a9
--- /dev/null
+++ b/assets/icons/xml.svg
@@ -0,0 +1,13 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Folha de documento com dobra -->
+  <path d="M 8 4 L 32 4 L 42 14 L 42 44 L 8 44 Z" fill="#ffffff" stroke="#0288d1" stroke-width="2.5" stroke-linejoin="round"/>
+  <!-- Dobra de canto -->
+  <path d="M 32 4 L 32 14 L 42 14 Z" fill="#b3e5fc" stroke="#0288d1" stroke-width="2" stroke-linejoin="round"/>
+  <!-- Linhas de texto representativas -->
+  <line x1="14" y1="20" x2="28" y2="20" stroke="#b0bec5" stroke-width="2" stroke-linecap="round"/>
+  <line x1="14" y1="25" x2="36" y2="25" stroke="#b0bec5" stroke-width="2" stroke-linecap="round"/>
+  <line x1="14" y1="30" x2="36" y2="30" stroke="#b0bec5" stroke-width="2" stroke-linecap="round"/>
+  <!-- Etiqueta azul com sigla XML -->
+  <rect x="10" y="33" width="28" height="11" rx="3" fill="#0288d1"/>
+  <text x="24" y="41.5" font-family="Segoe UI, Arial, sans-serif" font-size="8" font-weight="bold" fill="#ffffff" text-anchor="middle">&lt;XML&gt;</text>
+</svg>
diff --git a/assets/images/app-icon.png b/assets/images/app-icon.png
new file mode 100644
index 0000000..e9e231b
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diff --git a/assets/images/app-logo.png b/assets/images/app-logo.png
new file mode 100644
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diff --git a/assets/images/brand-banner.png b/assets/images/brand-banner.png
new file mode 100644
index 0000000..6bd57c9
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diff --git a/assets/images/default-seal.png b/assets/images/default-seal.png
new file mode 100644
index 0000000..d12d737
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diff --git a/build-jar.sh b/build-jar.sh
new file mode 100755
index 0000000..f42ecd9
--- /dev/null
+++ b/build-jar.sh
@@ -0,0 +1,130 @@
+#!/usr/bin/env bash
+# ==============================================================================
+# CyberCore Signer - Script de Automação de Build do Fat JAR Executável
+# ==============================================================================
+set -euo pipefail
+
+# Garante execução no diretório raiz do projeto
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+cd "${SCRIPT_DIR}"
+
+COLOR_RESET="\033[0m"
+COLOR_BOLD="\033[1m"
+COLOR_CYAN="\033[36m"
+COLOR_GREEN="\033[32m"
+COLOR_YELLOW="\033[33m"
+COLOR_RED="\033[31m"
+
+RUN_AFTER_BUILD=false
+RUN_TESTS=false
+
+# Interpretação de argumentos
+for arg in "$@"; do
+    case "${arg}" in
+        --with-tests|-t)
+            RUN_TESTS=true
+            ;;
+        --run|-r)
+            RUN_AFTER_BUILD=true
+            ;;
+        --help|-h)
+            echo -e "${COLOR_BOLD}Uso: ./build-jar.sh [opções]${COLOR_RESET}"
+            echo ""
+            echo "Opções disponíveis:"
+            echo "  --with-tests, -t   Executa a suíte completa de testes unitários antes de empacotar."
+            echo "  --run, -r          Inicia automaticamente o CyberCore Signer após a compilação."
+            echo "  --help, -h         Exibe esta mensagem de ajuda."
+            echo ""
+            echo "Exemplo:"
+            echo "  ./build-jar.sh          # Compilação e empacotamento rápido do JAR"
+            echo "  ./build-jar.sh --run    # Compila e já abre a aplicação"
+            exit 0
+            ;;
+        *)
+            echo -e "${COLOR_YELLOW}Aviso: Opção desconhecida: ${arg}. Use --help para detalhes.${COLOR_RESET}"
+            ;;
+    esac
+done
+
+echo -e "${COLOR_CYAN}${COLOR_BOLD}"
+echo "============================================================"
+echo "   CYBERCORE SIGNER - AUTOMAÇÃO DE BUILD DO JAR"
+echo "============================================================"
+echo -e "${COLOR_RESET}"
+
+# 1. Verificação e Auto-Detecção do Java (JDK 21+)
+if ! command -v java &>/dev/null; then
+    POSSIBLE_JDKS=(
+        "/home/claudecio/.jdks/jdk-25.0.4.1+1"
+        "/usr/lib/jvm/java-25-openjdk-amd64"
+        "/usr/lib/jvm/java-21-openjdk-amd64"
+        "/usr/lib/jvm/default-java"
+    )
+    for candidate in "${POSSIBLE_JDKS[@]}"; do
+        if [ -x "${candidate}/bin/java" ]; then
+            export JAVA_HOME="${candidate}"
+            export PATH="${JAVA_HOME}/bin:${PATH}"
+            break
+        fi
+    done
+fi
+
+if ! command -v java &>/dev/null; then
+    echo -e "${COLOR_RED}Erro: Java não foi encontrado no PATH nem nos diretórios padrão de JDK.${COLOR_RESET}"
+    echo -e "${COLOR_YELLOW}Dica: Não é necessário executar com 'sudo'. Tente executar normalmente: ./build-jar.sh${COLOR_RESET}"
+    exit 1
+fi
+
+JAVA_VERSION=$(java -version 2>&1 | awk -F '"' '/version/ {print $2}' | head -n 1)
+echo -e "Ambiente Java detectado: ${COLOR_BOLD}${JAVA_VERSION}${COLOR_RESET} (${JAVA_HOME:-$(which java)})"
+
+# 2. Verificação do Maven Wrapper
+if [[ ! -f "./mvnw" ]]; then
+    echo -e "${COLOR_RED}Erro: Maven Wrapper (./mvnw) não encontrado na raiz do projeto.${COLOR_RESET}"
+    exit 1
+fi
+chmod +x ./mvnw
+
+# 3. Execução do Build
+MVN_ARGS=("clean" "package")
+if [[ "${RUN_TESTS}" == "false" ]]; then
+    echo -e "${COLOR_YELLOW}Modo rápido ativado (pulando testes unitários). Para testar use: ./build-jar.sh --with-tests${COLOR_RESET}"
+    MVN_ARGS+=("-DskipTests")
+else
+    echo -e "${COLOR_CYAN}Executando testes unitários e de integração...${COLOR_RESET}"
+fi
+
+echo -e "Iniciando compilação e geração do Fat JAR via Maven..."
+./mvnw "${MVN_ARGS[@]}"
+
+SOURCE_JAR="modules/cybercore-app/target/cybercore-signer.jar"
+DEST_JAR="./cybercore-signer.jar"
+
+if [[ ! -f "${SOURCE_JAR}" ]]; then
+    echo -e "${COLOR_RED}Erro: O artefato ${SOURCE_JAR} não foi gerado pelo build.${COLOR_RESET}"
+    exit 1
+fi
+
+# 4. Copia para a raiz para facilitar o acesso
+cp -f "${SOURCE_JAR}" "${DEST_JAR}"
+
+JAR_SIZE=$(ls -lh "${DEST_JAR}" | awk '{print $5}')
+
+echo ""
+echo -e "${COLOR_GREEN}${COLOR_BOLD}============================================================${COLOR_RESET}"
+echo -e "${COLOR_GREEN}${COLOR_BOLD}✓ JAR GERADO COM SUCESSO!${COLOR_RESET}"
+echo -e "Arquivo: ${COLOR_BOLD}${DEST_JAR}${COLOR_RESET} (${JAR_SIZE})"
+echo -e "Local de origem: ${SOURCE_JAR}"
+echo -e "${COLOR_GREEN}${COLOR_BOLD}============================================================${COLOR_RESET}"
+echo ""
+echo -e "Para testar manualmente, execute:"
+echo -e "  ${COLOR_CYAN}java -jar ${DEST_JAR}${COLOR_RESET}          # Interface gráfica desktop"
+echo -e "  ${COLOR_CYAN}java -jar ${DEST_JAR} --dev${COLOR_RESET}    # Modo desenvolvimento (logs detalhados)"
+echo -e "  ${COLOR_CYAN}java -jar ${DEST_JAR} --headless${COLOR_RESET} # Modo console de segundo plano (porta 21325)"
+echo ""
+
+# 5. Execução automática opcional
+if [[ "${RUN_AFTER_BUILD}" == "true" ]]; then
+    echo -e "${COLOR_BOLD}Iniciando aplicação agora...${COLOR_RESET}"
+    java -jar "${DEST_JAR}"
+fi
diff --git a/config/spotbugs/exclude.xml b/config/spotbugs/exclude.xml
new file mode 100644
index 0000000..e3949df
--- /dev/null
+++ b/config/spotbugs/exclude.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+    Exclusões do SpotBugs / FindSecBugs.
+    Regra: toda exclusão deve ser específica (classe/padrão) e justificada em comentário.
+-->
+<FindBugsFilter
+        xmlns="https://github.com/spotbugs/filter/3.0.0"
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:schemaLocation="https://github.com/spotbugs/filter/3.0.0 https://raw.githubusercontent.com/spotbugs/spotbugs/3.1.0/spotbugs/etc/findbugsfilter.xsd">
+
+    <!--
+        Records imutáveis de DTO e relatório que já realizam cópia defensiva em seus
+        construtores canônicos (List.copyOf / Map.copyOf) mas são apontados por heurística do SpotBugs.
+    -->
+    <Match>
+        <Bug pattern="EI_EXPOSE_REP,EI_EXPOSE_REP2"/>
+        <Or>
+            <Class name="br.com.cybercore.signer.core.diagnostics.DiagnosticReport"/>
+            <Class name="br.com.cybercore.signer.core.domain.SigningResult"/>
+            <Class name="br.com.cybercore.signer.core.protocol.CcspResponse"/>
+        </Or>
+    </Match>
+</FindBugsFilter>
diff --git a/docs/CCSP.md b/docs/CCSP.md
new file mode 100644
index 0000000..ae4aec0
--- /dev/null
+++ b/docs/CCSP.md
@@ -0,0 +1,208 @@
+# CyberCore Signing Protocol (CCSP/1)
+
+O **CyberCore Signing Protocol (CCSP)** é o protocolo padrão para comunicação local entre aplicações web rodando no navegador e o agente desktop **CyberCore Signer**.
+
+A versão inicial descrita neste documento é a **CCSP/1**.
+
+---
+
+## 1. Princípios de Segurança
+
+1. **Isolamento de Rede:** O servidor local escuta exclusivamente no endereço de loopback `127.0.0.1` (porta padrão `21325`), impedindo qualquer acesso a partir da rede local (LAN) ou externa (WAN).
+2. **Controle Estrito de Origem (CORS):** O agente valida cabeçalhos `Origin` e responde apenas a pré-voos `OPTIONS` com origens autorizadas.
+3. **Registro e Autorização de Aplicações:** Nenhuma aplicação desconhecida tem acesso a certificados ou assinaturas. Ao tentar conectar pela primeira vez, uma caixa de diálogo nativa solicita aprovação explícita do usuário.
+4. **Confirmação Visual da Assinatura:** Toda operação de assinatura exige confirmação manual na interface gráfica, exibindo a aplicação solicitante, o hash do documento e o certificado selecionado.
+5. **Proteção Contra Ataques de Replay:** Toda requisição deve conter um `nonce` UUID único com validação temporal (`expires_at` ou `timestamp`). Requisições com nonces repetidos são sumariamente rejeitadas (`REPLAY_DETECTED`).
+6. **Privacidade Criptográfica:** Apenas o **digest (hash)** do documento é enviado ao agente. O documento completo nunca sai da aplicação web e a chave privada nunca sai do dispositivo/computador do usuário.
+
+---
+
+## 2. Endpoints do Protocolo (CCSP/1)
+
+### 2.1 `GET /ccsp/v1/status`
+Verifica se o agente está instalado, em execução e pronto para operações.
+
+#### Resposta de Sucesso (200 OK)
+```json
+{
+  "version": "1",
+  "status": "ready",
+  "agent": "CyberCore Signer",
+  "agent_version": "0.1.0",
+  "os": "Windows 11",
+  "timestamp": "2026-10-08T19:40:00Z"
+}
+```
+
+---
+
+### 2.2 `GET /ccsp/v1/certificates`
+Retorna a lista de certificados digitais atualmente disponíveis e aptos para assinatura.
+
+#### Headers / Parâmetros
+- `X-CyberCore-AppId`: UUID da aplicação autorizada (ou query param `?application_id=uuid`).
+- `Origin`: Origem web autorizada.
+
+#### Resposta de Sucesso (200 OK)
+```json
+{
+  "version": "1",
+  "status": "success",
+  "certificates": [
+    {
+      "id": "win-4340656a",
+      "alias": "CLAUDIO SILVA:12345678900",
+      "common_name": "CLAUDIO SILVA:12345678900",
+      "subject_dn": "CN=CLAUDIO SILVA:12345678900, OU=Autenticado por AR, O=ICP-Brasil, C=BR",
+      "issuer_dn": "CN=AC SERPRO v5, O=ICP-Brasil, C=BR",
+      "type": "A3",
+      "provider_id": "provider-win-store",
+      "device_name": "Token / Smart Card (Windows CAPI/CNG)",
+      "valid_from": "2024-05-10T12:00:00Z",
+      "valid_to": "2027-05-10T12:00:00Z",
+      "serial_number": "72910482910482019482",
+      "can_sign": true,
+      "status": "AVAILABLE"
+    }
+  ]
+}
+```
+
+---
+
+### 2.3 `POST /ccsp/v1/authorize`
+Handshake inicial de uma nova aplicação web para solicitar autorização ao usuário.
+
+#### Requisição
+```json
+{
+  "version": "1",
+  "application_id": "550e8400-e29b-41d4-a716-446655440000",
+  "name": "Portal Assinaturas Jurídicas"
+}
+```
+
+#### Resposta (200 OK)
+```json
+{
+  "version": "1",
+  "status": "authorized",
+  "application_id": "550e8400-e29b-41d4-a716-446655440000"
+}
+```
+
+---
+
+### 2.4 `POST /ccsp/v1/sign`
+Executa a assinatura digital do digest informado (PDF, XML, documentos ou arquivos gerais).
+
+#### Requisição
+```json
+{
+  "version": "1",
+  "request_id": "9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d",
+  "application_id": "550e8400-e29b-41d4-a716-446655440000",
+  "operation": "sign",
+  "algorithm": "SHA256withRSA",
+  "digest": "47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=",
+  "certificate_hint": "win-4340656a",
+  "document_name": "contrato_locacao.pdf",
+  "document_type": "PDF",
+  "nonce": "c4ca4238a0b923820dcc509a6f75849b",
+  "expires_at": "2026-10-08T19:45:00Z"
+}
+```
+
+#### Resposta de Sucesso (200 OK)
+```json
+{
+  "version": "1",
+  "request_id": "9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d",
+  "status": "signed",
+  "signature": "MEUCIQDq...base64...",
+  "certificate": "MIIFazC...base64...",
+  "certificate_chain": [
+    "MIIFazC...base64...",
+    "MIIEazC...base64..."
+  ],
+  "algorithm": "SHA256withRSA",
+  "subject_name": "CLAUDIO SILVA",
+  "subject_cpf_cnpj": "12345678900",
+  "document_name": "contrato_locacao.pdf",
+  "document_type": "PDF"
+}
+```
+
+---
+
+### 2.5 `POST /ccsp/v1/authenticate`
+Executa o login / autenticação digital segura de um usuário em sistemas web via desafio criptográfico (Challenge-Response ICP-Brasil).
+
+#### Requisição
+```json
+{
+  "version": "1",
+  "request_id": "9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d",
+  "application_id": "550e8400-e29b-41d4-a716-446655440000",
+  "operation": "authenticate",
+  "challenge": "server-session-challenge-nonce-2026",
+  "certificate_hint": "win-4340656a",
+  "purpose": "AUTHENTICATION",
+  "nonce": "c4ca4238a0b923820dcc509a6f75849b",
+  "expires_at": "2026-10-08T19:45:00Z"
+}
+```
+
+#### Resposta de Sucesso (200 OK)
+```json
+{
+  "version": "1",
+  "request_id": "9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d",
+  "status": "authenticated",
+  "signature": "MEUCIQDq...base64...",
+  "certificate": "MIIFazC...base64...",
+  "certificate_chain": [
+    "MIIFazC...base64..."
+  ],
+  "algorithm": "SHA256withRSA",
+  "subject_name": "CLAUDIO SILVA",
+  "subject_cpf_cnpj": "12345678900",
+  "document_type": "AUTH_CHALLENGE"
+}
+```
+
+#### Resposta de Erro (400/403/404)
+```json
+{
+  "version": "1",
+  "request_id": "9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d",
+  "status": "error",
+  "error_code": "USER_CANCELLED",
+  "message": "Operação de assinatura cancelada pelo usuário."
+}
+```
+
+---
+
+## 3. Tabela de Códigos de Erro Estruturados
+
+| Código | Significado |
+|---|---|
+| `CERTIFICATE_NOT_FOUND` | Certificado indicado no hint não foi encontrado. |
+| `CERTIFICATE_EXPIRED` | O certificado selecionado está fora do período de vigência. |
+| `CERTIFICATE_INVALID` | O certificado é inválido ou corrompido. |
+| `PRIVATE_KEY_NOT_AVAILABLE` | Chave privada inacessível ou ausente. |
+| `TOKEN_NOT_FOUND` | Nenhum dispositivo ou leitor compatível foi localizado. |
+| `TOKEN_REMOVED` | Dispositivo de hardware foi removido durante a assinatura. |
+| `PIN_REQUIRED` | PIN obrigatório para liberar chave privada em PKCS#11. |
+| `PIN_INCORRECT` | PIN digitado está incorreto. |
+| `PKCS11_ERROR` | Falha no middleware PKCS#11 do fabricante. |
+| `SIGNATURE_FAILED` | Erro durante a geração da assinatura digital. |
+| `APPLICATION_NOT_AUTHORIZED` | Aplicação não autorizada ou recusada pelo usuário. |
+| `REQUEST_EXPIRED` | A data/hora de validade da requisição expirou. |
+| `REPLAY_DETECTED` | O nonce informado já foi processado anteriormente. |
+| `INVALID_ORIGIN` | O cabeçalho Origin não corresponde ao cadastro da aplicação. |
+| `UNSUPPORTED_ALGORITHM` | Algoritmo não suportado (ex: diferente de SHA256withRSA). |
+| `USER_CANCELLED` | O usuário clicou em Cancelar ou fechou a janela de confirmação. |
+| `PROVIDER_NOT_AVAILABLE` | O provedor criptográfico necessário está inativo no SO. |
+| `COMMUNICATION_ERROR` | Erro interno no agente de comunicação local. |
diff --git a/docs/a1-a3-certificates.md b/docs/a1-a3-certificates.md
new file mode 100644
index 0000000..be529d3
--- /dev/null
+++ b/docs/a1-a3-certificates.md
@@ -0,0 +1,46 @@
+# Certificados Digitais A1, A3 e PKCS#11
+
+O **CyberCore Signer** oferece suporte abrangente aos formatos e repositórios de certificados digitais padrão ICP-Brasil utilizados no Brasil.
+
+---
+
+## 1. Certificados Digitais A1 (Software / PKCS#12)
+
+Os certificados A1 são arquivos com extensão `.pfx` ou `.p12` protegidos por senha.
+
+### Fluxo de Uso
+1. O usuário seleciona o arquivo via diálogo nativo (`FileChooser`) na interface ou importa via tela de Dashboard.
+2. É solicitada a senha em um diálogo seguro (`A1PasswordDialog`), mantida em `char[]` temporário e sobrescrita com zeros logo após a leitura da chave.
+3. O provedor `Pkcs12CertificateProvider` instancia um `KeyStore.getInstance("PKCS12")` e extrai os metadados do certificado X.509 (`subject`, `issuer`, `validade`, `algoritmo`, `tamanho da chave`).
+4. Durante a assinatura, a chave privada em memória gera a assinatura digital via `Signature.getInstance("SHA256withRSA")`.
+
+---
+
+## 2. Certificados Digitais A3 no Windows (Windows Certificate Store)
+
+No Windows 10/11, a maioria dos drivers de tokens USB e Smart Cards (ex: SafeSign, SafeNet Authentication Client, Serpro, Certisign) registra seus certificados diretamente no repositório de certificados do usuário (`Windows-MY`).
+
+### Vantagens do Provider `WindowsCertificateStoreProvider`
+- Acessa certificados físicos via CryptoAPI (CAPI) e Cryptography Next Generation (CNG) através do provedor JDK `SunMSCAPI`.
+- A chave privada permanece dentro do chip criptográfico do token.
+- Quando o token exige autenticação por PIN, a janela nativa do próprio driver do fabricante é invocada com segurança pelo sistema operacional Windows.
+
+---
+
+## 3. Hardware PKCS#11 Direto (Tokens USB e Smartcards)
+
+Para ambientes onde se deseja acesso direto ao middleware ou no Linux:
+- `Pkcs11CertificateProvider` pesquisa bibliotecas DLL / SO padrão:
+  - `eps2003csp11.dll` (SafeNet / eToken)
+  - `aetpkss1.dll` (SafeSign AET)
+  - `acospkcs11.dll` (ACOS / G&D)
+  - `opensc-pkcs11.dll` / `opensc-pkcs11.so` (OpenSC)
+- Utiliza o provider SunPKCS11 do JDK (`jdk.crypto.cryptoki`).
+
+---
+
+## 4. Monitoramento Dinâmico de Hardware (`SmartCardWatcher`)
+
+O componente `SmartCardWatcher` monitora os leitores PC/SC em segundo plano:
+- **Ao inserir um token:** Atualiza a lista de certificados automaticamente e notifica a interface gráfica.
+- **Ao remover o token:** Registra evento de auditoria (`AUDITORIA [TOKEN_REMOVED]`), limpa o cache de PIN de sessão em `PinSessionManager` e força um warm reset via `SmartCardSessionManager`.
diff --git a/docs/architecture.md b/docs/architecture.md
new file mode 100644
index 0000000..150052c
--- /dev/null
+++ b/docs/architecture.md
@@ -0,0 +1,79 @@
+# Arquitetura do CyberCore Signer
+
+O **CyberCore Signer** é um agente desktop nativo desenvolvido em Java 21+ LTS (Java 25 LTS) com interface JavaFX e segurança criptográfica JCA/JCE pura, projetado para permitir que aplicações web autorizadas solicitem assinaturas digitais ICP-Brasil padrão **A1** e **A3** diretamente da máquina do usuário.
+
+---
+
+## 1. Visão Geral da Arquitetura em Módulos
+
+O projeto adota uma arquitetura desacoplada em múltiplos módulos Maven independentes:
+
+```
+cybercore-signer/
+├── modules/
+│   ├── cybercore-core/         # Núcleo de criptografia, provedores, protocolo e segurança
+│   ├── cybercore-ui/           # Interface gráfica JavaFX, diálogos nativos e System Tray
+│   └── cybercore-app/          # Ponto de entrada (Main), bootstrap e empacotamento nativo
+├── sdk/                        # SDK Web em JavaScript (@cybercore/signer-sdk)
+├── scripts/                    # Scripts de build nativo jpackage para Windows e Linux
+└── docs/                       # Especificações técnicas e manuais de integração
+```
+
+### 1.1 `cybercore-core`
+- **Domínio:** Modelos imutáveis como `ManagedCertificate`, `SigningContext`, `SigningResult`, `CertificateType` e `CertificateStatus`.
+- **Criptografia:** `SigningService` e `DigestAlgorithm` utilizando exclusivamente os provedores padrão JCA/JCE (sem reimplementação manual de algoritmos).
+- **Provedores:** Abstração `CertificateProvider` com implementações:
+  - `Pkcs12CertificateProvider`: leitura de arquivos `.pfx`/`.p12` em memória protegida.
+  - `WindowsCertificateStoreProvider`: integração nativa com o repositório de chaves do Windows (`Windows-MY` via SunMSCAPI/CNG).
+  - `Pkcs11CertificateProvider`: integração com drivers de middleware e tokens USB/Smartcards via `SunPKCS11`.
+- **Protocolo & Rede Local:** `CcspServer` escuta estritamente em `127.0.0.1:21325`, fornecendo a API REST CCSP/1.
+- **Segurança & Configurações:** `ApplicationRegistry`, `NonceManager` (proteção anti-replay), `OriginValidator`, `SmartCardSessionManager` e `AgentConfigurationService` (persistência em `~/.cybercore/config.json`).
+- **Validação Criptográfica:** `SignatureValidationService` com suporte a Assinaturas Incorporadas (PAdES PDF, CMS/P7M com conteúdo embutido, XMLDSig) e Assinaturas Destacadas (Detached CMS/P7S).
+- **Selos Visuais Personalizados:** `CustomSealStorage` (persistência em `~/.cybercore/seals/`), `PdfSealThemeRegistry` dinâmico e `CpfDisplayMode` (privacidade LGPD).
+
+### 1.2 `cybercore-ui`
+- Interface desenvolvida com JavaFX 25, empregando layout moderno e simétrico de grade 3x3 de operações e coluna lateral de utilitários:
+  - `MainAppView`: grade 3x3 otimizada:
+    - Linha 0: Assinar PDF, Assinar XML, Assinatura Atachada
+    - Linha 1: Co-Assinar Documento, Carimbo do Tempo, Gerenciar Selos
+    - Linha 2: Validar Assinatura, Validar Carimbo, Sair do Agente
+  - `SealDesignerDialog`: criador e instalador de selos digitais personalizados com pré-visualização ao vivo (Live Preview), seletores de cores, estilos de emblema, obrigatoriedade de nome completo, controle de mascaramento de CPF e estampa de data/hora.
+  - `SignatureValidationDialog`: diálogo de validação criptográfica real com alternância entre Assinatura Incorporada e Assinatura Destacada, extração de documento embutido e relatório de signatários.
+  - `PdfSignDialog`: modal de assinatura PAdES com posicionamento por clique na folha, atalho direto para criar/instalar selos e opções dinâmicas de CPF/data-hora.
+  - `SettingsView`: configurações gerais persistentes, política de PIN e gerenciamento de selos instalados.
+
+### 1.3 `cybercore-app`
+- Main bootstrap (`CyberCoreSignerApplication`).
+- Tratamento de parâmetros de inicialização (`--dev`, `--headless`).
+- Execução de diagnósticos preliminares de ambiente e engine criptográfica antes do início das threads de escuta.
+- Geração de Fat JAR autocontido via `maven-shade-plugin` e preparação para distribuição `jpackage`.
+
+---
+
+## 2. Fluxo de Dados e Princípio de Menor Privilégio
+
+O CyberCore Signer opera sob o **modelo de assinatura descentralizada por digest**:
+1. A aplicação web calcula o hash criptográfico SHA-256 no próprio navegador utilizando a Web Crypto API nativa.
+2. Apenas o hash Base64 de 32 bytes trafega localmente para o CyberCore Signer.
+3. O documento completo nunca sai do navegador e a chave privada nunca sai do computador ou do hardware do usuário.
+
+```mermaid
+sequenceDiagram
+    autonumber
+    actor Usuario as Usuário
+    participant Web as Aplicação Web (SDK)
+    participant CCSP as CcspServer (127.0.0.1)
+    participant UI as CyberCore JavaFX
+    participant Crypto as SigningService & Providers
+
+    Web->>CCSP: POST /ccsp/v1/sign (digest, appId, certHint, nonce)
+    CCSP->>CCSP: Valida autorização, nonce anti-replay e digest
+    CCSP->>UI: Solicita confirmação visual (requestSignatureConfirmation)
+    UI->>Usuario: Exibe Diálogo (Hash, Certificado, Aplicação)
+    Usuario->>UI: Aprova assinatura (e insere PIN se A3)
+    UI-->>CCSP: Confirmação concedida
+    CCSP->>Crypto: sign(SigningContext) [Trava FIFO]
+    Crypto->>Crypto: JCA/JCE Signature.update(digest) + sign()
+    Crypto-->>CCSP: SigningResult (signatureBytes, certChain)
+    CCSP-->>Web: JSON { status: "signed", signature: "...", certificate: "..." }
+```
diff --git a/docs/authentication-login.md b/docs/authentication-login.md
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--- /dev/null
+++ b/docs/authentication-login.md
@@ -0,0 +1,71 @@
+# Autenticação e Login Digital via CyberCore Signer
+
+Este documento descreve o fluxo de **Login e Autenticação de Usuários com Certificado Digital ICP-Brasil (A1 e A3)** através do agente desktop **CyberCore Signer** e o protocolo **CCSP/1**.
+
+---
+
+## 1. Visão Geral do Modelo de Autenticação
+
+O login por certificado digital no CyberCore Signer adota o padrão de mercado **Challenge-Response Criptográfico**:
+1. O backend da sua aplicação web gera um **desafio único (challenge / nonce)** para a sessão atual.
+2. A aplicação web solicita a assinatura desse desafio ao **CyberCore Signer** através do SDK JavaScript.
+3. O CyberCore Signer apresenta ao usuário na tela nativa do computador uma solicitação visual com destaque de **LOGIN / AUTENTICAÇÃO**:
+   - Identifica a aplicação solicitante e a origem;
+   - Mostra o certificado selecionado e o titular;
+   - Solicita aprovação expressa do usuário (e a digitação do PIN caso seja token ou smart card A3).
+4. O CyberCore assina o desafio com a chave privada do certificado local e devolve:
+   - A **assinatura digital do desafio**;
+   - O **certificado X.509 completo** (DER Base64) e cadeia;
+   - O **nome e CPF/CNPJ** do titular extraídos do certificado.
+5. O frontend web envia a resposta de volta ao backend, que:
+   - Valida criptograficamente a assinatura com a chave pública do certificado recebido;
+   - Confirma a validade e cadeia do certificado junto à ICP-Brasil;
+   - Localiza o usuário correspondente no banco de dados pelo CPF/CNPJ;
+   - Cria a sessão autenticada do usuário no sistema.
+
+---
+
+## 2. Exemplo de Integração Frontend com o SDK
+
+```javascript
+import { CyberCoreSigner } from '@cybercore/signer-sdk';
+
+const signer = new CyberCoreSigner({
+  applicationName: 'Portal Corporativo'
+});
+
+async function realizarLoginComCertificado(certificateId) {
+  // 1. Obter desafio único gerado pelo seu backend
+  const { challenge } = await fetch('/api/auth/challenge').then(r => r.json());
+
+  // 2. Solicitar autenticação ao CyberCore Signer
+  const authResult = await signer.authenticate({
+    certificateId: certificateId,
+    challenge: challenge
+  });
+
+  // 3. Enviar assinatura e certificado ao backend para validação e abertura de sessão
+  const sessionResponse = await fetch('/api/auth/login-certificate', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({
+      challenge: authResult.challenge,
+      signature: authResult.signature,
+      certificate: authResult.certificate
+    })
+  });
+
+  if (sessionResponse.ok) {
+    console.log('Usuário autenticado com sucesso:', authResult.subjectName);
+    window.location.href = '/dashboard';
+  }
+}
+```
+
+---
+
+## 3. Segurança e Prevenção de Ataques
+
+- **Prevenção de Ataques de Replay:** Cada desafio deve possuir tempo de expiração curto (ex: 60 a 90 segundos) e ser descartado no servidor após uma única tentativa.
+- **Proteção da Chave Privada:** A chave privada e o PIN do usuário permanecem exclusivamente sob custódia do hardware/computador local do usuário.
+- **Consentimento Explícito:** O CyberCore Signer nunca assina desafios em segundo plano sem a exibição do diálogo e autorização do usuário na tela nativa.
diff --git a/docs/development-mode.md b/docs/development-mode.md
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+++ b/docs/development-mode.md
@@ -0,0 +1,48 @@
+# Modo de Desenvolvimento e Diagnóstico Detalhado
+
+O **CyberCore Signer** opera exclusivamente com **certificados digitais e provedores criptográficos reais** (A1 via arquivos `.pfx`/`.p12`, repositório nativo do Windows `Windows-MY` e tokens/smart cards físicos PKCS#11). Em conformidade com a exigência de segurança de produção, **não existem mocks ou certificados sintéticos no agente**.
+
+---
+
+## 1. Ativação do Modo de Desenvolvimento
+
+Para iniciar o agente em modo de desenvolvimento (com logs detalhados e diagnósticos ampliados), utilize o argumento `--dev`:
+
+```bash
+java -jar cybercore-signer.jar --dev
+```
+
+Ao iniciar, uma mensagem informativa é registrada no log:
+```
+=========================================================
+ MODO DE DESENVOLVIMENTO ATIVADO (--dev)
+ Logs detalhados ativos. Operação com certificados reais.
+=========================================================
+```
+
+---
+
+## 2. Testando em Ambiente de Desenvolvimento
+
+Para desenvolvedores testarem fluxos completos de assinatura de PDF, XML, arquivos em geral e login digital:
+
+1. **Certificados A1 de Teste/Homologação:**
+   - Adicione um certificado A1 `.pfx` ou `.p12` emitido por uma autoridade de teste ou autoassinado.
+   - Pela interface desktop, clique no botão **"Importar A1 (.pfx/.p12)"** no Dashboard e informe o arquivo e a senha.
+   - O certificado ficará disponível imediatamente para todas as operações CCSP/1.
+
+2. **Repositório Nativo do Windows (Windows-MY):**
+   - Instale o certificado no repositório de certificados pessoais do Windows (`certmgr.msc`).
+   - O provedor `WindowsCertificateStoreProvider` detectará o certificado automaticamente.
+
+3. **Tokens USB / Smart Cards (PKCS#11):**
+   - Conecte o dispositivo físico com middleware homologado (SafeSign, GD Burti, SafeNet, OpenSC, etc.).
+   - O provedor `Pkcs11CertificateProvider` detectará o token e seus slots.
+
+---
+
+## 3. Garantia de Operação Real
+
+1. Toda assinatura é gerada criptograficamente através dos provedores JCA/JCE reais.
+2. A resposta do protocolo CCSP/1 contém assinaturas válidas e certificados X.509 autênticos.
+3. Não há certificados simulados ou flags artificiais nas respostas do agente.
diff --git a/docs/diagnostics.md b/docs/diagnostics.md
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+++ b/docs/diagnostics.md
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+# Diagnóstico de Ambiente e Auto-Teste
+
+O **CyberCore Signer** possui um subsistema nativo de diagnóstico integrado (`DiagnosticService`), permitindo auditoria detalhada de saúde e integridade técnica da máquina do usuário.
+
+---
+
+## 1. Itens Inspecionados no Diagnóstico
+
+Ao abrir a aba **Diagnóstico** na interface ou invocar `diagnosticService.runDiagnostic()`, o agente avalia:
+
+1. **Ambiente Java / Runtime:**
+   - Versão do Java (requer Java 21+ LTS, homologado em Java 25 LTS);
+   - Vendor do JDK (Temurin, Oracle, etc.);
+   - Arquitetura do processador e sistema operacional.
+2. **Engine Criptográfica JCA/JCE:**
+   - Disponibilidade dos provedores de segurança registrados na JVM (`SUN`, `SunRsaSign`, `SunMSCAPI`, etc.);
+   - Suporte ao algoritmo de hash `SHA-256`;
+   - Suporte ao algoritmo de assinatura `SHA256withRSA`.
+3. **Repositório de Chaves do Sistema Operacional:**
+   - Detecção do repositório `Windows-MY` (Windows CryptoAPI / CNG).
+4. **Middlewares PKCS#11 e SmartCard:**
+   - Verificação de bibliotecas de smartcard registradas no sistema (`eps2003csp11.dll`, `aetpkss1.dll`, `opensc-pkcs11.dll`, etc.);
+   - Disponibilidade do subsistema PC/SC `javax.smartcardio`.
+
+---
+
+## 2. Auto-Teste de Assinatura Local (Self-Test)
+
+A aba de diagnóstico disponibiliza o botão **"Executar Auto-teste de Assinatura"**:
+1. Seleciona o primeiro certificado operacional disponível na máquina.
+2. Gera um hash SHA-256 interno de teste: `"Documento_Teste_CyberCore_<timestamp>"`.
+3. Abre o diálogo de confirmação visual para validação do usuário.
+4. Executa a assinatura real JCA/JCE e afere os bytes gerados.
+5. Emite relatório de sucesso com tempo decorrido e tamanho da assinatura.
diff --git a/docs/errors.md b/docs/errors.md
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+++ b/docs/errors.md
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+# Catálogo Estruturado de Erros
+
+O **CyberCore Signer** adota um sistema unificado e determinístico de códigos de erro (`CcspErrorCode`) compartilhados entre o agente Java desktop, o protocolo CCSP/1 e o SDK Web em JavaScript.
+
+---
+
+## 1. Tabela de Erros Estruturados
+
+| Código de Erro | Descrição Detalhada | Ação Recomendada para a Aplicação Web |
+|---|---|---|
+| `CERTIFICATE_NOT_FOUND` | O certificado indicado pelo `certificate_hint` não foi localizado. | Solicite ao usuário selecionar novamente o certificado via `getCertificates()`. |
+| `CERTIFICATE_EXPIRED` | O certificado selecionado expirou. | Oriente o usuário a renovar o certificado digital junto à autoridade certificadora. |
+| `CERTIFICATE_INVALID` | O certificado possui estrutura corrompida ou ainda não é válido. | Verificar a data e integridade do arquivo/dispositivo. |
+| `PRIVATE_KEY_NOT_AVAILABLE` | O certificado está presente mas a chave privada não está acessível. | Em tokens A3, verifique se o middleware/driver está instalado corretamente. |
+| `TOKEN_NOT_FOUND` | Nenhum dispositivo ou leitor compatível foi localizado. | Solicite ao usuário conectar o token USB ou inserir o smartcard no leitor. |
+| `TOKEN_REMOVED` | O token USB ou cartão foi removido fisicamente durante a assinatura. | Peça ao usuário reconectar o token e reiniciar a operação de assinatura. |
+| `PIN_REQUIRED` | O token exige PIN para liberar a chave privada e nenhum PIN foi fornecido. | Exibir campo de solicitação de PIN na tela. |
+| `PIN_INCORRECT` | O PIN digitado está incorreto. | Informar o usuário e alertar sobre o risco de bloqueio de PUK após 3 tentativas. |
+| `PKCS11_ERROR` | Falha no driver ou biblioteca PKCS#11 do fabricante. | Verificar a instalação do SafeSign, SafeNet ou OpenSC. |
+| `SIGNATURE_FAILED` | Erro durante a geração dos bytes da assinatura digital. | Tentar novamente ou reiniciar o agente desktop. |
+| `APPLICATION_NOT_AUTHORIZED` | A aplicação web teve autorização recusada pelo usuário. | Informar o usuário que é necessário aceitar a notificação na tela do agente. |
+| `REQUEST_EXPIRED` | O timestamp ou `expires_at` da requisição expirou. | Gerar nova requisição de assinatura com timestamp atualizado. |
+| `REPLAY_DETECTED` | O nonce informado já foi processado anteriormente. | Sempre gerar um UUID único para cada chamada de assinatura. |
+| `INVALID_ORIGIN` | O cabeçalho `Origin` não confere com o cadastro da aplicação. | Conectar-se com a URL e protocolo autorizados. |
+| `UNSUPPORTED_ALGORITHM` | Algoritmo solicitado não é suportado pelo agente ou certificado. | Utilizar algoritmo padrão homologado (`SHA256withRSA`). |
+| `USER_CANCELLED` | O usuário clicou em Cancelar ou fechou a janela do CyberCore. | Tratar como cancelamento voluntário sem mensagem de erro alarmante. |
+| `PROVIDER_NOT_AVAILABLE` | O provedor criptográfico necessário não está ativo no sistema operacional. | Verificar a integridade do Windows Certificate Store ou Java Runtime. |
+| `COMMUNICATION_ERROR` | Erro interno de socket ou timeout de rede local. | Verificar se a porta `21325` não está bloqueada por antivírus local. |
diff --git a/docs/image.png b/docs/image.png
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diff --git a/docs/installation.md b/docs/installation.md
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+# Instalação e Empacotamento Nativo
+
+O **CyberCore Signer** foi projetado para distribuição sem exigir que o usuário final tenha o Java ou JRE instalado em seu computador.
+
+---
+
+## 1. Requisitos de Sistema
+
+- **Sistema Operacional Homologado:** Windows 10 (64-bit) ou Windows 11 (64-bit).
+- **Compatibilidade Adicional:** Linux x86_64 e macOS (arquitetura preparada).
+- **Hardware:** Mínimo de 4 GB RAM, 150 MB de espaço em disco.
+- **Porta de Rede Local:** A porta TCP `21325` deve estar livre em `127.0.0.1`.
+
+---
+
+## 2. Geração do Instalador Windows (MSI / EXE) com `jpackage`
+
+O empacotamento utiliza a ferramenta nativa `jpackage` incluída no JDK 21/25.
+
+### No Windows:
+Execute o script em lote localizado na raiz:
+```cmd
+scripts\package-windows.bat
+```
+
+### O que o script realiza:
+1. Compila o projeto em modo release:
+   ```cmd
+   mvnw clean package -DskipTests
+   ```
+2. Invoca o `jpackage` criando o instalador Windows:
+   - Extrai um runtime mínimo customizado contendo apenas os módulos necessários (`java.base`, `java.desktop`, `java.smartcardio`, `jdk.crypto.cryptoki`, etc.).
+   - Cria atalhos na Área de Trabalho e no Menu Iniciar.
+   - Gera um instalador padrão MSI ou EXE em `dist/`.
+
+---
+
+## 3. Instalação e Inicialização com o Sistema
+
+1. Execute o instalador `CyberCore-Signer-0.1.0.msi`.
+2. Siga as instruções do assistente de instalação.
+3. Ao concluir, o ícone do **CyberCore Signer** aparecerá na Área de Notificação (System Tray) ao lado do relógio do Windows.
+4. O serviço local `http://127.0.0.1:21325` estará imediatamente disponível para atender as aplicações web autorizadas.
diff --git a/docs/limitations.md b/docs/limitations.md
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+# Limitações Técnicas e Dependências Declaradas
+
+Conforme estabelecido na **Regra 23** do projeto (*"Não invente suporte a certificados, tokens, providers, algoritmos ou hardware que não tenham sido realmente implementados/testados. Quando algo depender de fabricante, middleware, Windows ou hardware físico, declare a dependência"*), as seguintes limitações são formalmente declaradas:
+
+---
+
+## 1. Dependências de Sistema Operacional e Hardware
+
+1. **Windows Certificate Store (Windows-MY):**
+   - Disponível apenas em sistemas operacionais Microsoft Windows (Windows 10/11).
+   - Em Linux e macOS, o provedor `WindowsCertificateStoreProvider` declara-se automaticamente indisponível (`isAvailable() == false`), operando via arquivos A1 ou PKCS#11 direto.
+2. **Tokens A3 e Middlewares Proprietários:**
+   - O reconhecimento de smartcards e tokens USB depende da instalação prévia dos drivers do fabricante do dispositivo físico (ex: SafeSign Identity Client, SafeNet Authentication Client, drivers de leitoras Gemalto/Omnikey).
+   - O CyberCore Signer não instala drivers de hardware nem substitui o middleware do fabricante.
+3. **Bloqueio de Cartão por Tentativas de PIN:**
+   - A política de bloqueio por tentativas consecutivas de PIN incorreto (geralmente 3 tentativas) é governada estritamente pelo chip físico do dispositivo A3 e pelo driver do fabricante, estando fora do controle do software do agente.
+
+---
+
+## 2. Limitações de Rede e Concorrência
+
+1. **Escuta Exclusiva em Loopback:**
+   - O agente não oferece nem oferece suporte para escuta em endereços de rede externa (IPs locais de LAN ou WAN). Essa restrição é um elemento fundamental do modelo de segurança.
+2. **Operações Concorrentes no Mesmo Token Físico:**
+   - Drivers PKCS#11 e smartcards ICP-Brasil frequentemente operam em modo mono-thread ou canal serial exclusivo. Por essa razão, o CyberCore Signer serializa as assinaturas em fila FIFO (`signLock`) para impedir corrupção de sessão no chip do cartão.
diff --git a/docs/pades.md b/docs/pades.md
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+++ b/docs/pades.md
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+![alt text](image.png)# Assinaturas PDF (PAdES) e Selos Visuais em SVG
+
+Este documento descreve a arquitetura e o funcionamento da assinatura digital de arquivos PDF no padrão **PAdES (PDF Advanced Electronic Signatures)** no CyberCore Signer, incluindo o subsistema de **selos visuais temáticos baseados em SVG**.
+
+---
+
+## 1. Visão Geral da Arquitetura
+
+O CyberCore Signer implementa assinatura PAdES em dois modos complementares:
+
+1. **Modo Desacoplado via Protocolo CCSP/1 (Web):** A aplicação web prepara a estrutura `/ByteRange`, envia apenas o digest SHA-256 e o CyberCore assina localmente com o certificado A1/A3 sem expor a chave privada.
+2. **Modo Desktop Completo (Desktop UI):** O usuário seleciona um arquivo PDF localmente, escolhe o certificado ICP-Brasil, customiza o selo visual e o `PdfSigningService` gera o PDF assinado completo com envelope CMS/PKCS#7 e estampa gráfica.
+
+```mermaid
+graph TD
+    A[Arquivo PDF Original] --> B[PdfSigningService]
+    C[Tema de Selo SVG] --> D[PdfSealRenderer Java2D]
+    E[Metadados Signatário] --> D
+    D -->|Estampa Visual 300 DPI| B
+    F[Chave Privada A1/A3] --> G[Bouncy Castle CMS Generator]
+    B -->|PAdES Incremental| H[PDF Assinado Digitalmente]
+    G --> H
+```
+
+---
+
+## 2. Subsistema de Selos Visuais em SVG e Temas
+
+O selo visual é uma representação gráfica da assinatura estipulada em conformidade com as recomendações do ITI e MP nº 2.200-2/2001.
+
+### 2.1 Temas Pré-configurados e Ícones Vetoriais (`PdfSealThemeRegistry` & `PdfSealRenderer`)
+
+Os brasões e ícones padrão do sistema ficam centralizados em:
+- **Catálogo de Temas:** `modules/cybercore-core/.../pdf/seal/PdfSealThemeRegistry.java` (definição de cores, dimensões, textos padrão e tipo de ícone).
+- **Desenho Vetorial Java2D:** `modules/cybercore-core/.../pdf/seal/PdfSealRenderer.drawThemeIcon()` (renderização matemática em Java2D dos brasões padrão: `shield`, `star`, `crystal`, `notary`, etc.).
+
+| ID do Tema | Nome | Descrição | Ícone Vetorial |
+| :--- | :--- | :--- | :--- |
+| `icp-brasil` | **ICP-Brasil Oficial** | Padrão clássico com brasão e cadeado verde/azul | Escudo e cadeado |
+| `cybercore-modern` | **CyberCore Modern** | Estilo tecnológico neon com cristal multifacetado | Cristal vetorial |
+| `minimal-clean` | **Minimalista Clean** | Monocromático para relatórios executivos sóbrios | Carimbo notarial com check |
+| `gov-br` | **Gov.br Oficial** | Identidade visual Verde-Oliva conforme MP 2.200-2/2001 | Brasão estelar estilizado |
+
+### 2.2 Renderização Gráfica (`PdfSealRenderer`)
+
+- O núcleo `cybercore-core` **não depende de JavaFX**, atendendo às regras estritas de arquitetura (`ArchitectureTest`).
+- A renderização é efetuada através da API **Java2D (AWT)** nativa com anti-aliasing duplo (`RenderingHints.VALUE_ANTIALIAS_ON`, subpixel text, escala 2x / 300 DPI).
+- Exporta tanto `BufferedImage` quanto `byte[]` PNG para inclusão no PDFBox ou pré-visualização dinâmica na interface com `ImageView`.
+
+### 2.3 Criação, Instalação e Privacidade de Selos Personalizados
+
+- **Foco Exclusivo no Titular (Sem Emissor/AC no Gráfico):** O selo foi desenhado para ser limpo e elegante. Dados técnicos do certificado e o emissor da Autoridade Certificadora não são exibidos no gráfico do selo, evitando poluição visual.
+- **Obrigatoriedade do Nome Completo:** O renderizador calcula dinamicamente a métrica de fontes via `drawFittedText()` para garantir que o nome completo do signatário seja sempre exibido na íntegra, com destaque tipográfico (13.5pt a 14.5pt em negrito), sem cortes ou truncamentos.
+- **Upload de Logotipo / Emblema Próprio:** Suporte a upload de imagens de logotipos (PNG, JPG, BMP) armazenadas de forma portável em Base64 dentro do tema, com renderização redimensionada e anti-aliasing de 300 DPI.
+- **Campos Customizáveis (Matrícula, Cargo, OAB, etc.):** Permite definir rótulo e valor padrão no tema (ex: `Matrícula: 104829/SP` ou `Cargo: Auditor Fiscal`) ou informar pontualmente durante a assinatura via `customExtraInfo`. A informação é posicionada de forma harmônica na linha de identificação do signatário.
+- **Privacidade do CPF (LGPD):** O modelo `CpfDisplayMode` suporta três modalidades:
+  - `FULL`: exibe o documento completo (`CPF: 123.456.789-00`).
+  - `MASKED`: mascara dígitos sensíveis (`CPF: ***.456.789-**`).
+  - `NONE`: oculta totalmente o CPF do gráfico do selo.
+- **Data e Hora Opcional:** Parâmetro booleano para incluir ou suprimir data/hora no gráfico.
+- **Instalação e Persistência Local:** Através de `CustomSealStorage`, novos selos criados ou importados são salvos em `~/.cybercore/seals/*.json` e registrados dinamicamente no `PdfSealThemeRegistry`.
+
+### 2.4 Gerenciamento Centralizado de Selos (`SealManagementDialog`)
+
+- **Lista Completa:** Exibição unificada de selos embutidos do sistema e selos personalizados instalados pelo usuário.
+- **Selo Padrão Ativo:** Permite definir qual selo é o padrão ativo para todas as assinaturas do usuário, gravado em `AgentConfiguration` (`defaultSealThemeId`).
+- **Pré-visualização em Tempo Real:** Renderização fiel do selo com dados de exemplo ao navegar pela lista.
+- **Clonagem e Edição:** Permite duplicar qualquer selo (inclusive os embutidos) e abri-lo no `SealDesignerDialog` para customização.
+- **Importação e Exportação:** Exportação de temas em arquivos `.json` e importação com um clique para compartilhamento entre máquinas e equipes.
+
+---
+
+## 3. Posicionamento e Pré-Visualização Interativa
+
+A posição e a página da estampa são parametrizáveis via `PdfSignatureOptions`:
+
+- **Posições Automáticas:** `BOTTOM_RIGHT`, `BOTTOM_LEFT`, `TOP_RIGHT`, `TOP_LEFT`.
+- **Posição Interativa Personalizada (`CUSTOM`):** O usuário clica ou arrasta o selo diretamente sobre a página do PDF na interface gráfica. As coordenadas na tela são matematicamente mapeadas para as coordenadas de mídia do PDFBox:
+  $$X_{pdf} = \frac{X_{clique}}{Largura_{view}} \times Largura_{pdf}$$
+  $$Y_{pdf} = Altura_{pdf} - \left(\frac{Y_{clique}}{Altura_{view}} \times Altura_{pdf}\right) - Altura_{selo}$$
+- **Páginas:** `LAST_PAGE` (recomendado), `FIRST_PAGE`, `ALL_PAGES`, ou página específica numérica (`targetPageNumber`).
+- **Dimensões padrão:** 200 pt de largura por 55 pt de altura, com margens de segurança e clamping contra extravasamento.
+- **Renderização da Folha:** O `PdfSigningService` fornece `renderPagePngBytes(pdfBytes, pageIndex, dpi)` via PDFBox `PDFRenderer`, permitindo que o diálogo da UI JavaFX renderize a folha de papel em background thread com paginação e sobreposição visual do selo.
+
+---
+
+## 4. Estrutura Criptográfica PAdES
+
+- **Motor:** Apache PDFBox 3.0.4 + Bouncy Castle 1.80 (`bcpkix-jdk18on`).
+- **Filtro:** `/Filter /Adobe.PPKLite` e `/SubFilter /adbe.pkcs7.detached`.
+- **Algoritmo:** `SHA256withRSA` / PKCS#1 v1.5 com digest SHA-256.
+- **Salva Incremental:** Preserva a integridade de assinaturas anteriores e do documento original sem quebrar certificações prévias.
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diff --git a/docs/sdk.md b/docs/sdk.md
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+# SDK Web JavaScript (@cybercore/signer-sdk)
+
+O `@cybercore/signer-sdk` é a biblioteca oficial cliente em JavaScript para integrar aplicações web modernas com o agente desktop **CyberCore Signer** via protocolo **CCSP/1**.
+
+---
+
+## 1. Instalação e Importação
+
+### Via Módulo ES6 (Browser ou Bundler Vite/Webpack/Next.js)
+```javascript
+import { CyberCoreSigner } from '@cybercore/signer-sdk';
+
+const signer = new CyberCoreSigner({
+  applicationName: 'Portal Meu Negócio'
+});
+```
+
+---
+
+## 2. Métodos da API
+
+### `isInstalled(timeoutMs = 2000): Promise<boolean>`
+Testa rapidamente se o agente desktop está ativo na porta local `21325`.
+
+### `connect(): Promise<boolean>`
+Realiza o handshake inicial de autorização. Se for a primeira vez que a aplicação tenta se conectar, abre uma caixa de diálogo nativa no desktop do usuário para concessão de acesso.
+
+### `getCertificates(): Promise<Array<Object>>`
+Retorna todos os certificados A1 e A3 disponíveis e operacionais na máquina do usuário.
+
+```javascript
+const certs = await signer.getCertificates();
+certs.forEach(cert => {
+  console.log(`[${cert.type}] ${cert.common_name} (Validade: ${cert.valid_to})`);
+});
+```
+
+### `sign(options): Promise<Object>`
+Solicita a assinatura digital local de um digest ou conteúdo bruto.
+
+### `signPdf(pdfFile, options): Promise<Object>`
+Assina um documento PDF (PAdES / Assinatura desacoplada). Recebe `File`, `Blob`, `ArrayBuffer` ou `Uint8Array`.
+Calcula o SHA-256 no próprio navegador e transmite metadados do documento (`PDF`) ao agente para exibição clara na janela de confirmação.
+
+```javascript
+const pdfResult = await signer.signPdf(fileInput.files[0], {
+  certificateId: certs[0].id
+});
+```
+
+### `signXml(xmlContent, options): Promise<Object>`
+Assina um documento XML (XMLDSig / NF-e). Aceita string com o XML formatado ou objeto de arquivo `File`/`Blob`.
+
+```javascript
+const xmlResult = await signer.signXml(xmlString, {
+  certificateId: certs[0].id,
+  documentName: 'nfe-3524.xml'
+});
+```
+
+### `signFile(file, options): Promise<Object>`
+Assina qualquer arquivo (ZIP, DOCX, imagens, binários, executáveis) gerando pacote de assinatura detached / CAdES.
+
+```javascript
+const fileResult = await signer.signFile(fileInput.files[0], {
+  certificateId: certs[0].id
+});
+```
+
+### `authenticate(options): Promise<Object>` (ou `login(options)`)
+Executa login seguro com certificado digital via desafio criptográfico (Challenge-Response).
+
+```javascript
+const auth = await signer.authenticate({
+  certificateId: certs[0].id,
+  challenge: 'server-nonce-12345'
+});
+
+console.log('Bem-vindo,', auth.subjectName);
+console.log('CPF/CNPJ:', auth.subjectCpfCnpj);
+console.log('Assinatura do Desafio:', auth.signature);
+```
+
+### `extractSubjectInfo(certificateBase64): { name, cpfCnpj }`
+Decodifica o certificado X.509 e extrai os dados do titular ICP-Brasil (Nome, CPF ou CNPJ).
+
+### `verify(options): Promise<boolean>`
+Validação sintática e criptográfica da integridade da assinatura gerada.
+
+---
+
+## 3. Tratamento Estruturado de Erros
+
+O SDK expõe classes de erro dedicadas que herdam de `CyberCoreError`:
+
+```javascript
+import {
+  UserCancelledError,
+  CertificateNotFoundError,
+  PinIncorrectError,
+  TokenNotFoundError
+} from '@cybercore/signer-sdk/errors';
+
+try {
+  await signer.sign({ certificateId: 'cert-1', data: 'Contrato' });
+} catch (err) {
+  if (err instanceof UserCancelledError) {
+    alert('Você cancelou a assinatura no CyberCore Signer.');
+  } else if (err instanceof PinIncorrectError) {
+    alert('O PIN do token informado está incorreto.');
+  } else if (err instanceof TokenNotFoundError) {
+    alert('Conecte o seu token USB na máquina para assinar.');
+  } else {
+    console.error('Erro na assinatura:', err);
+  }
+}
+```
diff --git a/docs/security.md b/docs/security.md
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+++ b/docs/security.md
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+# Modelo de Segurança e Privacidade
+
+O **CyberCore Signer** foi projetado seguindo as diretrizes rigorosas da ICP-Brasil e os princípios de *Security by Design* e *Least Privilege*.
+
+---
+
+## 1. Isolamento de Rede
+
+1. **Loopback Estrito:** O socket do servidor HTTP local vincula-se exclusivamente ao endereço IP `127.0.0.1`. Nenhuma interface de rede externa (LAN ou WAN) escuta a porta de serviço `21325`.
+2. **Prevenção contra Exposição Acidental:** Testes unitários e de arquitetura garantem que conexões fora de `127.0.0.1` sejam bloqueadas imediatamente no nível de bind do socket.
+
+---
+
+## 2. Autenticação e Autorização de Aplicações
+
+Nenhuma aplicação desconhecida tem autorização para obter certificados ou assinar documentos sem consentimento expresso:
+
+1. **Handshake de Autorização (`POST /ccsp/v1/authorize`):**
+   - A aplicação web identifica-se enviando seu `application_id` (UUID estável) e seu nome amigável.
+   - O CyberCore Signer suspende a requisição e abre uma janela modal nativa na tela principal do sistema operacional perguntando se o usuário autoriza aquele domínio web.
+2. **Armazenamento Seguro das Autorizações:**
+   - As aplicações autorizadas são gravadas em `~/.cybercore/authorized-apps.json`.
+   - O usuário pode visualizar e **revogar a qualquer momento** qualquer permissão através da aba **Configurações** na interface gráfica.
+
+---
+
+## 3. Proteção Contra Ataques de Replay
+
+Cada solicitação de assinatura enviada pelo SDK deve incluir:
+- Um `nonce` (UUID criptograficamente aleatório);
+- Um campo `expires_at` (ou `timestamp`).
+
+O componente `NonceManager`:
+- Armazena os nonces recentes em memória protegida com expiração temporal (TTL);
+- Rejeita com código estruturado `REPLAY_DETECTED` caso o mesmo nonce seja submetido mais de uma vez;
+- Rejeita com código `REQUEST_EXPIRED` requisições cuja data/hora de validade já tenha sido ultrapassada.
+
+---
+
+## 4. Confirmação Visual Obrigatória e Proteção de PIN/Chaves
+
+1. **Confirmação Manual do Usuário:** Toda e qualquer assinatura exige intervenção física e visual do usuário. Não é possível assinar "silenciosamente" por chamadas de API em segundo plano.
+2. **Inviolabilidade da Chave Privada:** A chave privada nunca é exportada nem manipulada em forma de bytes puros. Todas as operações utilizam handles JCA/JCE ou comandos de hardware nativo.
+3. **Proteção de PIN e Senhas:**
+   - O PIN de smartcards e a senha de arquivos A1 nunca são transmitidos para a aplicação web e nunca aparecem em logs de auditoria.
+   - Em caso de remoção do hardware, o `SmartCardWatcher` limpa e zera os buffers de memória de PIN imediatamente.
diff --git a/docs/serpro-layout-and-batch.md b/docs/serpro-layout-and-batch.md
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+# Layout CyberCore Signer — Design Dual-Theme & Assinatura em Lote
+
+O **CyberCore Signer** adota uma interface gráfica que une a ergonomia de hub consolidada no mercado nacional com uma identidade visual moderna, autoral e com suporte dinâmico a **Tema Claro (Light)** e **Tema Escuro (Dark)**.
+
+---
+
+## 1. Identidade Visual e Filosofia de Design
+
+Em conformidade com os requisitos do projeto, a interface **não é uma cópia datada**, mas sim uma evolução:
+1. **Identidade CyberCore:** Logotipo central em cristal tridimensional e escudo criptográfico vetorial (`SvgIcons`), subtítulo "Agente Criptográfico Local • ICP-Brasil" e indicador de segurança em tempo real.
+2. **Badge de Status Ativo:** Exibe o status da porta local (`● Agente Ativo • 127.0.0.1:21325`) com verde esmeralda no modo claro e verde neon no modo escuro.
+3. **Alternador Dinâmico de Temas:** Botão pílula localizado no cabeçalho superior que permite ao usuário alternar instantaneamente entre **Modo Claro** e **Modo Escuro**:
+   - Ícone do Sol ☀️ para comutar para o tema Claro.
+   - Ícone da Lua 🌙 para comutar para o tema Escuro.
+   - Classe gerenciadora centralizada: [`ThemeManager.java`](file:///var/www/cybercore/cybercore-signer/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/theme/ThemeManager.java), que replica a escolha de tema para todos os diálogos secundários.
+
+---
+
+## 2. Paleta de Cores dos Temas
+
+| Componente | Tema Claro (Light) | Tema Escuro (Dark) |
+|---|---|---|
+| **Fundo da Janela** | `#f1f5f9` (Slate suave) | `#0b0f17` (Dark profundo) |
+| **Header Superior** | `#ffffff`, borda `#e2e8f0` | `#121824`, borda `#1e293b` |
+| **Cartões de Ação** | `#ffffff`, borda `#e2e8f0`, hover `#0284c7` | `#131c2e`, borda `#1e293b`, hover `#38bdf8` |
+| **Texto dos Botões** | `#1e293b` (Cinza escuro de alto contraste) | `#f8fafc` (Branco gelo nítido) |
+| **Painel Lateral** | `#ffffff`, borda `#e2e8f0` | `#121824`, borda `#1e293b` |
+| **Badge de Status** | Fundo `#ecfdf5`, texto `#047857`, borda `#10b981` | Fundo `rgba(16, 185, 129, 0.15)`, texto `#34d399` |
+| **Alternador de Tema** | Fundo `#ffffff`, borda `#cbd5e1`, hover `#0284c7` | Fundo `#1e293b`, borda `#334155`, hover `#38bdf8` |
+
+---
+
+## 3. Grade Central de Ações (Hub 4x3)
+
+A interface principal organiza as operações em 12 cartões modernos com cantos arredondados (8px), sombras suaves e ícones vetoriais SVG nítidos:
+
+| Posição | Operação | Descrição |
+|---|---|---|
+| (0, 0) | **Assinar PDF** | Assinatura digital de documentos PDF com cálculo de hash SHA-256 e gravação de assinatura. |
+| (1, 0) | **Assinar XML** | Assinatura de documentos XML (estruturas fiscais, NF-e, XMLDSig). |
+| (2, 0) | **Assinar Arquivo** | Assinatura genérica de qualquer arquivo ou binário do sistema. |
+| (3, 0) | **Assinar em Lote** | Processamento simultâneo de múltiplos arquivos com barra de progresso em tempo real. |
+| (0, 1) | **Assinatura Atachada** | Assinatura embutida/anexada ao documento original (CAdES enveloped). |
+| (1, 1) | **Co-Assinar Documento** | Adição de nova assinatura a um documento previamente assinado por outro titular. |
+| (2, 1) | **Carimbo do Tempo** | Integração com protocolo RFC 3161 TSP para prova de anterioridade temporal. |
+| (3, 1) | **Assinatura LTV** | Perfil de Longa Duração com inclusão de cadeia de certificados e carimbos para validade permanente. |
+| (0, 2) | **Validar Assinatura** | Verificação de integridade criptográfica e conformidade do certificado digital. |
+| (1, 2) | **Validar Carimbo** | Verificação da autenticidade e validade temporal de tokens TSR/TSP. |
+| (2, 2) | *(Reservado)* | Espaço reservado para expansões futuras do agente. |
+| (3, 2) | **Sair do Agente** | Encerramento seguro da sessão do agente. |
+
+---
+
+## 4. Painel Lateral de Utilitários
+
+Na coluna lateral direita, o usuário dispõe de atalhos rápidos para operações do sistema:
+
+1. **`</> Logs`:** Visualizador de auditoria em tempo real, monitorando requisições locais CCSP/1 e eventos criptográficos.
+2. **`⚙ Configurações`:** Gerenciador de origens web autorizadas, revogação de acessos e opções de PIN.
+3. **`💻 Tutorial`:** Guia passo a passo interativo de uso do assinador e integração web.
+4. **`🗂 Certificados`:** Lista de certificados ICP-Brasil instalados (Windows-MY, A1 e A3) e ferramenta para importação de certificados A1 (`.pfx` / `.p12`).
+5. **`ℹ Sobre`:** Informações de versão, engine JCA/JCE e garantias de privacidade local.
+
+---
+
+## 5. Assinatura Digital em Lote (`BatchSigningDialog`)
+
+A funcionalidade de assinatura em lote permite:
+- Seleção de múltiplos arquivos simultâneos via diálogo de arquivos ou pastas.
+- Visualização de tabela com nome, tamanho e status de cada item em tempo real.
+- Seleção do certificado digital ICP-Brasil desejado (com exibição de titular, CPF/CNPJ, tipo A1/A3 e validade).
+- Escolha da pasta de destino para os arquivos assinados (salvando arquivos `.p7s` correspondentes).
+- Execução assíncrona em thread isolada para manter a interface responsiva durante todo o lote.
+- Compatibilidade automática com o tema ativo (Claro ou Escuro).
+
+---
+
+## 6. Ícones Vetoriais SVG Nativos (`SvgIcons`)
+
+Todos os ícones e o logotipo central em cristal foram construídos via `SVGPath` e primitivas vetoriais JavaFX nativas:
+- **Resolução Infinita:** Perfeita nitidez em monitores Full HD, 2K, 4K e configurações de escala de DPI do Windows (100%, 125%, 150%, 200%).
+- **Sem Dependência de Imagens Rasterizadas:** Sem risco de imagens ausentes ou corrompidas no runtime empacotado.
diff --git a/docs/xml-xmldsig.md b/docs/xml-xmldsig.md
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+++ b/docs/xml-xmldsig.md
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+# Assinaturas XML (XMLDSig e ICP-Brasil)
+
+Este documento descreve a especificação e o funcionamento da assinatura digital de arquivos XML no padrão **W3C XMLDSig (XML Digital Signatures)** e **ICP-Brasil** no CyberCore Signer.
+
+---
+
+## 1. Visão Geral
+
+O CyberCore Signer fornece suporte nativo a assinaturas digitais XML utilizando a engine padronizada e segura da plataforma Java (`javax.xml.crypto.dsig`).
+
+### 1.1 Casos de Uso Suportados
+
+- **Documento Inteiro Envelopado (`URI=""`):** Contratos, despachos, declarações e relatórios em formato XML.
+- **Assinatura de Elementos Específicos por ID:**
+  - **NF-e (Nota Fiscal Eletrônica):** Assinatura da tag `<infNFe Id="NFe...">`
+  - **CT-e (Conhecimento de Transporte Eletrônico):** Assinatura da tag `<infCte Id="CTe...">`
+  - **MDF-e (Manifesto Eletrônico de Documentos Fiscais):** Assinatura da tag `<infMDFe Id="MDFe...">`
+  - **eSocial / EFD-Reinf:** Assinatura de eventos com tags `<evt... Id="...">`
+
+---
+
+## 2. Padrões Criptográficos
+
+- **Canonicalização (C14N):** `http://www.w3.org/TR/2001/REC-xml-c14n-20010315` (C14N inclusiva sem comentários).
+- **Transformações:**
+  - `http://www.w3.org/2000/09/xmldsig#enveloped-signature` (remove a assinatura do cálculo do digest).
+  - C14N padrão.
+- **Algoritmo de Digest:** SHA-256 (`http://www.w3.org/2001/04/xmlenc#sha256`).
+- **Algoritmo de Assinatura:** RSA-SHA256 (`http://www.w3.org/2001/04/xmldsig-more#rsa-sha256`).
+- **KeyInfo:** Informações do certificado X.509 embutidas em `<X509Data><X509Certificate>`.
+
+---
+
+## 3. Segurança e Mitigação contra XXE
+
+O parser XML é configurado com blindagem estrita contra ataques **XML External Entity (XXE)** e expansões recursivas de entidades:
+
+```java
+DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
+dbf.setNamespaceAware(true);
+dbf.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
+dbf.setFeature("http://xml.org/sax/features/external-general-entities", false);
+dbf.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
+dbf.setXIncludeAware(false);
+dbf.setExpandEntityReferences(false);
+```
+
+---
+
+## 4. Validação Pós-Assinatura
+
+O serviço `XmlSigningService.validateXmlSignature(byte[] xmlBytes)` permite auditar a assinatura imediatamente após sua emissão, verificando:
+
+1. A integridade criptográfica da assinatura (`SignedInfo`).
+2. A integridade dos digests de todas as referências apontadas (`Reference.validate()`).
+3. O certificado X.509 público extraído da chave.
diff --git a/modules/cybercore-app/pom.xml b/modules/cybercore-app/pom.xml
new file mode 100644
index 0000000..5cb16cd
--- /dev/null
+++ b/modules/cybercore-app/pom.xml
@@ -0,0 +1,162 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>br.com.cybercore.signer</groupId>
+        <artifactId>cybercore-signer-parent</artifactId>
+        <version>0.1.0-SNAPSHOT</version>
+        <relativePath>../../pom.xml</relativePath>
+    </parent>
+
+    <artifactId>cybercore-app</artifactId>
+    <packaging>jar</packaging>
+
+    <name>CyberCore Signer :: Application</name>
+    <description>Módulo executável desktop, ciclo de vida da aplicação, shutdown hooks e empacotamento nativo.</description>
+
+    <dependencies>
+        <dependency>
+            <groupId>br.com.cybercore.signer</groupId>
+            <artifactId>cybercore-core</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>br.com.cybercore.signer</groupId>
+            <artifactId>cybercore-ui</artifactId>
+        </dependency>
+
+        <!-- JavaFX Neutro -->
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-controls</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-graphics</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-base</artifactId>
+        </dependency>
+
+        <!-- JavaFX Nativos Windows (para execução direta em ambiente Windows) -->
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-controls</artifactId>
+            <version>${javafx.version}</version>
+            <classifier>win</classifier>
+        </dependency>
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-graphics</artifactId>
+            <version>${javafx.version}</version>
+            <classifier>win</classifier>
+        </dependency>
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-base</artifactId>
+            <version>${javafx.version}</version>
+            <classifier>win</classifier>
+        </dependency>
+
+        <!-- JavaFX Nativos Linux (para execução direta em ambiente Linux) -->
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-controls</artifactId>
+            <version>${javafx.version}</version>
+            <classifier>linux</classifier>
+        </dependency>
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-graphics</artifactId>
+            <version>${javafx.version}</version>
+            <classifier>linux</classifier>
+        </dependency>
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-base</artifactId>
+            <version>${javafx.version}</version>
+            <classifier>linux</classifier>
+        </dependency>
+
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-core</artifactId>
+        </dependency>
+
+        <!-- Testes de Arquitetura -->
+        <dependency>
+            <groupId>com.tngtech.archunit</groupId>
+            <artifactId>archunit-junit5</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-core</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.openjfx</groupId>
+                <artifactId>javafx-maven-plugin</artifactId>
+                <configuration>
+                    <mainClass>br.com.cybercore.signer.app.CyberCoreSignerApplication</mainClass>
+                </configuration>
+            </plugin>
+
+            <!-- Geração de Fat JAR executável autocontido -->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>3.6.0</version>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                        <configuration>
+                            <finalName>cybercore-signer</finalName>
+                            <shadedArtifactAttached>false</shadedArtifactAttached>
+                            <transformers>
+                                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                                    <mainClass>br.com.cybercore.signer.app.CyberCoreSignerApplication</mainClass>
+                                    <manifestEntries>
+                                        <Implementation-Title>CyberCore Signer</Implementation-Title>
+                                        <Implementation-Version>${project.version}</Implementation-Version>
+                                        <Implementation-Vendor>CyberCore</Implementation-Vendor>
+                                    </manifestEntries>
+                                </transformer>
+                            </transformers>
+                            <filters>
+                                <filter>
+                                    <artifact>*:*</artifact>
+                                    <excludes>
+                                        <exclude>META-INF/*.SF</exclude>
+                                        <exclude>META-INF/*.DSA</exclude>
+                                        <exclude>META-INF/*.RSA</exclude>
+                                        <exclude>module-info.class</exclude>
+                                        <exclude>META-INF/versions/**/module-info.class</exclude>
+                                    </excludes>
+                                </filter>
+                            </filters>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>
diff --git a/modules/cybercore-app/src/main/java/br/com/cybercore/signer/app/CyberCoreSignerApplication.java b/modules/cybercore-app/src/main/java/br/com/cybercore/signer/app/CyberCoreSignerApplication.java
new file mode 100644
index 0000000..8817b83
--- /dev/null
+++ b/modules/cybercore-app/src/main/java/br/com/cybercore/signer/app/CyberCoreSignerApplication.java
@@ -0,0 +1,144 @@
+package br.com.cybercore.signer.app;
+
+import br.com.cybercore.signer.core.diagnostics.DiagnosticReport;
+import br.com.cybercore.signer.core.diagnostics.DiagnosticService;
+import br.com.cybercore.signer.core.crypto.SigningService;
+import br.com.cybercore.signer.core.protocol.CcspServer;
+import br.com.cybercore.signer.core.provider.CertificateManager;
+import br.com.cybercore.signer.ui.CyberCoreDesktopApplication;
+import javafx.application.Application;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.awt.GraphicsEnvironment;
+
+/**
+ * Ponto de entrada (Main Class) e bootstrap do agente CyberCore Signer.
+ */
+public class CyberCoreSignerApplication {
+
+    private static final Logger logger = LoggerFactory.getLogger(CyberCoreSignerApplication.class);
+
+    private static boolean developmentMode = false;
+    private static boolean headlessMode = false;
+    private static boolean noWaitMode = false;
+    private static volatile CcspServer runningServer = null;
+
+    public static CcspServer getRunningServer() {
+        return runningServer;
+    }
+
+    public static void stopServer() {
+        if (runningServer != null) {
+            runningServer.stop();
+            runningServer = null;
+        }
+    }
+
+    public static void main(String[] args) {
+        parseArguments(args);
+        printBanner();
+
+        logger.info("Inicializando CyberCore Signer v0.1.0...");
+        if (developmentMode) {
+            logger.warn("=========================================================");
+            logger.warn(" MODO DE DESENVOLVIMENTO ATIVADO (--dev)");
+            logger.warn(" Logs detalhados ativos. Operação com certificados reais.");
+            logger.warn("=========================================================");
+        }
+
+        DiagnosticService diagnosticService = new DiagnosticService();
+        DiagnosticReport report = diagnosticService.runDiagnostic();
+        logger.info("Ambiente verificado: OS={} {} ({}), Java={} ({})",
+                report.osName(), report.osVersion(), report.osArch(),
+                report.javaVersion(), report.javaVendor());
+
+        if (!report.cryptoEngineOk()) {
+            logger.error("ALERTA CRÍTICO: Engine criptográfica JCA/JCE não está totalmente operacional!");
+        }
+
+        // Se o ambiente tiver suporte gráfico e não for headless forçado, abre a interface JavaFX
+        boolean isHeadless = headlessMode || GraphicsEnvironment.isHeadless();
+
+        if (isHeadless) {
+            logger.info("Executando em modo console / headless (sem interface gráfica).");
+            startHeadlessServer();
+        } else {
+            try {
+                logger.info("Iniciando interface gráfica desktop...");
+                CyberCoreDesktopApplication.setDevelopmentMode(developmentMode);
+                Application.launch(CyberCoreDesktopApplication.class, args);
+            } catch (Throwable t) {
+                logger.warn("Não foi possível inicializar ambiente gráfico ({}). Continuando em modo console.", t.getMessage());
+                startHeadlessServer();
+            }
+        }
+
+        logger.info("CyberCore Signer finalizado.");
+    }
+
+    private static void startHeadlessServer() {
+        try {
+            CertificateManager certManager = CertificateManager.createDefault();
+            if (developmentMode) {
+                logger.info("Modo de desenvolvimento ativo (com certificados reais do sistema).");
+            }
+            SigningService signingService = new SigningService(certManager);
+            runningServer = new CcspServer(certManager, signingService, null);
+            runningServer.start();
+            logger.info("Servidor local CCSP/1 pronto em http://127.0.0.1:{}", runningServer.getPort());
+
+            Runtime.getRuntime().addShutdownHook(new Thread(() -> {
+                logger.info("Encerrando servidor local CCSP/1...");
+                stopServer();
+            }));
+
+            // Mantém processo vivo para atender requisições web, a menos que em modo no-wait
+            if (!noWaitMode) {
+                Thread.currentThread().join();
+            }
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+        } catch (Exception e) {
+            logger.error("Falha ao inicializar servidor local CCSP/1 no modo console: {}", e.getMessage(), e);
+        }
+    }
+
+    private static void parseArguments(String[] args) {
+        if (args != null) {
+            for (String arg : args) {
+                if ("--dev".equalsIgnoreCase(arg) || "-dev".equalsIgnoreCase(arg)) {
+                    developmentMode = true;
+                } else if ("--headless".equalsIgnoreCase(arg) || "-headless".equalsIgnoreCase(arg)
+                        || "--cli".equalsIgnoreCase(arg)) {
+                    headlessMode = true;
+                } else if ("--no-wait".equalsIgnoreCase(arg) || "-no-wait".equalsIgnoreCase(arg)
+                        || "--test".equalsIgnoreCase(arg)) {
+                    noWaitMode = true;
+                }
+            }
+        }
+    }
+
+    public static boolean isDevelopmentMode() {
+        return developmentMode;
+    }
+
+    public static boolean isHeadlessMode() {
+        return headlessMode;
+    }
+
+    private static void printBanner() {
+        System.out.println("""
+                ============================================================
+                   ____            _                 ____
+                  / ___| _   _  __| |  ___  _ __    / ___|___   _ __  ___
+                 | |    | | | |/ _` | / _ \\| '__|  | |   / _ \\ | '__|/ _ \\
+                 | |___ | |_| | (_| ||  __/| |     | |__| (_) || |  |  __/
+                  \\____| \\__, |\\__,_| \\___||_|      \\____\\___/ |_|   \\___|
+                         |___/
+                                  SIGNER AGENT v0.1.0
+                ============================================================
+                """);
+    }
+}
diff --git a/modules/cybercore-app/src/main/resources/logback.xml b/modules/cybercore-app/src/main/resources/logback.xml
new file mode 100644
index 0000000..3626ce9
--- /dev/null
+++ b/modules/cybercore-app/src/main/resources/logback.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="CONSOLE" />
+    </root>
+
+    <logger name="br.com.cybercore.signer" level="DEBUG" />
+</configuration>
diff --git a/modules/cybercore-app/src/test/java/br/com/cybercore/signer/app/ArchitectureTest.java b/modules/cybercore-app/src/test/java/br/com/cybercore/signer/app/ArchitectureTest.java
new file mode 100644
index 0000000..4f6be7d
--- /dev/null
+++ b/modules/cybercore-app/src/test/java/br/com/cybercore/signer/app/ArchitectureTest.java
@@ -0,0 +1,37 @@
+package br.com.cybercore.signer.app;
+
+import com.tngtech.archunit.core.domain.JavaClasses;
+import com.tngtech.archunit.core.importer.ClassFileImporter;
+import com.tngtech.archunit.lang.ArchRule;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static com.tngtech.archunit.lang.syntax.ArchRuleDefinition.noClasses;
+
+class ArchitectureTest {
+
+    private final JavaClasses importedClasses = new ClassFileImporter()
+            .importPackages("br.com.cybercore.signer");
+
+    @Test
+    @DisplayName("O módulo Core não deve depender de classes dos pacotes UI ou App")
+    void coreShouldNotDependOnUiOrApp() {
+        ArchRule rule = noClasses()
+                .that().resideInAPackage("br.com.cybercore.signer.core..")
+                .should().dependOnClassesThat()
+                .resideInAnyPackage("br.com.cybercore.signer.ui..", "br.com.cybercore.signer.app..");
+
+        rule.check(importedClasses);
+    }
+
+    @Test
+    @DisplayName("O módulo Core não deve conter dependências de bibliotecas JavaFX")
+    void coreShouldNotDependOnJavaFx() {
+        ArchRule rule = noClasses()
+                .that().resideInAPackage("br.com.cybercore.signer.core..")
+                .should().dependOnClassesThat()
+                .resideInAPackage("javafx..");
+
+        rule.check(importedClasses);
+    }
+}
diff --git a/modules/cybercore-app/src/test/java/br/com/cybercore/signer/app/CyberCoreSignerApplicationTest.java b/modules/cybercore-app/src/test/java/br/com/cybercore/signer/app/CyberCoreSignerApplicationTest.java
new file mode 100644
index 0000000..0398c33
--- /dev/null
+++ b/modules/cybercore-app/src/test/java/br/com/cybercore/signer/app/CyberCoreSignerApplicationTest.java
@@ -0,0 +1,20 @@
+package br.com.cybercore.signer.app;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThatCode;
+
+class CyberCoreSignerApplicationTest {
+
+    @Test
+    @DisplayName("Deve inicializar a aplicação com argumentos sem erros")
+    void shouldBootstrapWithoutErrors() {
+        try {
+            assertThatCode(() -> CyberCoreSignerApplication.main(new String[]{"--dev", "--headless", "--no-wait"}))
+                    .doesNotThrowAnyException();
+        } finally {
+            CyberCoreSignerApplication.stopServer();
+        }
+    }
+}
diff --git a/modules/cybercore-core/pom.xml b/modules/cybercore-core/pom.xml
new file mode 100644
index 0000000..b4388fc
--- /dev/null
+++ b/modules/cybercore-core/pom.xml
@@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>br.com.cybercore.signer</groupId>
+        <artifactId>cybercore-signer-parent</artifactId>
+        <version>0.1.0-SNAPSHOT</version>
+        <relativePath>../../pom.xml</relativePath>
+    </parent>
+
+    <artifactId>cybercore-core</artifactId>
+    <packaging>jar</packaging>
+
+    <name>CyberCore Signer :: Core</name>
+    <description>Núcleo de domínio, abstrações criptográficas, provedores A1/A3, protocolo CCSP e servidor local.</description>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.datatype</groupId>
+            <artifactId>jackson-datatype-jsr310</artifactId>
+        </dependency>
+
+        <!-- PDF (PAdES) e Criptografia CMS/PKCS#7 -->
+        <dependency>
+            <groupId>org.apache.pdfbox</groupId>
+            <artifactId>pdfbox</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.bouncycastle</groupId>
+            <artifactId>bcpkix-jdk18on</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.bouncycastle</groupId>
+            <artifactId>bcprov-jdk18on</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.bouncycastle</groupId>
+            <artifactId>bcutil-jdk18on</artifactId>
+        </dependency>
+
+        <!-- Testes -->
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-core</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/config/AgentConfiguration.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/config/AgentConfiguration.java
new file mode 100644
index 0000000..c8494b5
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/config/AgentConfiguration.java
@@ -0,0 +1,43 @@
+package br.com.cybercore.signer.core.config;
+
+import br.com.cybercore.signer.core.pdf.seal.CpfDisplayMode;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+
+/**
+ * Modelo de configurações gerais e de segurança do CyberCore Signer.
+ */
+@JsonIgnoreProperties(ignoreUnknown = true)
+public record AgentConfiguration(
+        boolean requireConfirmation,
+        boolean alwaysPromptPin,
+        boolean autoStart,
+        String defaultSealThemeId,
+        CpfDisplayMode defaultCpfDisplayMode,
+        boolean defaultIncludeDateTime,
+        int serverPort
+) {
+
+    public AgentConfiguration {
+        if (defaultSealThemeId == null || defaultSealThemeId.isBlank()) {
+            defaultSealThemeId = "icp-brasil";
+        }
+        if (defaultCpfDisplayMode == null) {
+            defaultCpfDisplayMode = CpfDisplayMode.FULL;
+        }
+        if (serverPort <= 0) {
+            serverPort = 18420;
+        }
+    }
+
+    public static AgentConfiguration defaultConfiguration() {
+        return new AgentConfiguration(
+                true,
+                false,
+                false,
+                "icp-brasil",
+                CpfDisplayMode.FULL,
+                true,
+                18420
+        );
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/config/AgentConfigurationService.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/config/AgentConfigurationService.java
new file mode 100644
index 0000000..ef1b8f0
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/config/AgentConfigurationService.java
@@ -0,0 +1,94 @@
+package br.com.cybercore.signer.core.config;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Objects;
+
+/**
+ * Serviço de gerenciamento e persistência das configurações do CyberCore Signer.
+ * Salva e recupera as preferências do usuário no arquivo ~/.cybercore/config.json.
+ */
+public final class AgentConfigurationService {
+
+    private static final Logger logger = LoggerFactory.getLogger(AgentConfigurationService.class);
+    private static final String CONFIG_FILE_NAME = "config.json";
+
+    private static final AgentConfigurationService INSTANCE = new AgentConfigurationService();
+
+    private final Path configPath;
+    private final ObjectMapper objectMapper;
+    private AgentConfiguration currentConfig;
+
+    public static AgentConfigurationService getInstance() {
+        return INSTANCE;
+    }
+
+    public AgentConfigurationService() {
+        this(resolveDefaultConfigPath());
+    }
+
+    public AgentConfigurationService(Path configPath) {
+        this.configPath = Objects.requireNonNull(configPath);
+        this.objectMapper = new ObjectMapper()
+                .enable(SerializationFeature.INDENT_OUTPUT);
+        this.currentConfig = load();
+    }
+
+    private static Path resolveDefaultConfigPath() {
+        String userHome = System.getProperty("user.home", ".");
+        return Path.of(userHome, ".cybercore", CONFIG_FILE_NAME);
+    }
+
+    public synchronized AgentConfiguration getConfig() {
+        return currentConfig;
+    }
+
+    public synchronized AgentConfiguration loadConfiguration() {
+        return getConfig();
+    }
+
+    public synchronized void updateConfig(AgentConfiguration newConfig) {
+        Objects.requireNonNull(newConfig, "Configuração não pode ser nula.");
+        this.currentConfig = newConfig;
+        save();
+    }
+
+    public synchronized void saveConfiguration(AgentConfiguration newConfig) {
+        updateConfig(newConfig);
+    }
+
+    private AgentConfiguration load() {
+        try {
+            if (Files.exists(configPath)) {
+                AgentConfiguration cfg = objectMapper.readValue(configPath.toFile(), AgentConfiguration.class);
+                logger.info("Configurações do agente carregadas de: {}", configPath);
+                return cfg;
+            }
+        } catch (Exception e) {
+            logger.warn("Falha ao ler {}. Usando configurações padrão: {}", configPath, e.getMessage());
+        }
+        return AgentConfiguration.defaultConfiguration();
+    }
+
+    private void save() {
+        try {
+            if (configPath.getParent() != null && !Files.exists(configPath.getParent())) {
+                Files.createDirectories(configPath.getParent());
+            }
+            objectMapper.writeValue(configPath.toFile(), currentConfig);
+            logger.info("Configurações do agente salvas com sucesso em: {}", configPath);
+        } catch (IOException e) {
+            logger.error("Erro ao salvar configurações em {}: {}", configPath, e.getMessage(), e);
+        }
+    }
+
+    public Path getConfigPath() {
+        return configPath;
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/crypto/DigestAlgorithm.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/crypto/DigestAlgorithm.java
new file mode 100644
index 0000000..522a1ed
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/crypto/DigestAlgorithm.java
@@ -0,0 +1,66 @@
+package br.com.cybercore.signer.core.crypto;
+
+import br.com.cybercore.signer.core.protocol.CcspErrorCode;
+import br.com.cybercore.signer.core.provider.CertificateProviderException;
+
+/**
+ * Algoritmos criptográficos de assinatura suportados pelo CyberCore Signer.
+ */
+public enum DigestAlgorithm {
+    SHA256_WITH_RSA("SHA256withRSA", "SHA-256", 32),
+    SHA384_WITH_RSA("SHA384withRSA", "SHA-384", 48),
+    SHA512_WITH_RSA("SHA512withRSA", "SHA-512", 64),
+    SHA256_WITH_ECDSA("SHA256withECDSA", "SHA-256", 32),
+    SHA384_WITH_ECDSA("SHA384withECDSA", "SHA-384", 48),
+    SHA512_WITH_ECDSA("SHA512withECDSA", "SHA-512", 64);
+
+    private final String jcaName;
+    private final String digestName;
+    private final int expectedDigestLengthBytes;
+
+    DigestAlgorithm(String jcaName, String digestName, int expectedDigestLengthBytes) {
+        this.jcaName = jcaName;
+        this.digestName = digestName;
+        this.expectedDigestLengthBytes = expectedDigestLengthBytes;
+    }
+
+    public String getJcaName() {
+        return jcaName;
+    }
+
+    public String getDigestName() {
+        return digestName;
+    }
+
+    public int getExpectedDigestLengthBytes() {
+        return expectedDigestLengthBytes;
+    }
+
+    public static DigestAlgorithm fromName(String name) throws CertificateProviderException {
+        if (name == null || name.isBlank()) {
+            throw new CertificateProviderException(CcspErrorCode.UNSUPPORTED_ALGORITHM, "Algoritmo não especificado.");
+        }
+        for (DigestAlgorithm alg : values()) {
+            if (alg.jcaName.equalsIgnoreCase(name.trim())) {
+                return alg;
+            }
+        }
+        throw new CertificateProviderException(
+                CcspErrorCode.UNSUPPORTED_ALGORITHM,
+                "Algoritmo não suportado pelo CyberCore Signer: " + name
+        );
+    }
+
+    public void validateDigestLength(byte[] digest) throws CertificateProviderException {
+        if (digest == null) {
+            throw new CertificateProviderException(CcspErrorCode.SIGNATURE_FAILED, "Digest não pode ser nulo.");
+        }
+        if (digest.length != expectedDigestLengthBytes) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.SIGNATURE_FAILED,
+                    String.format("Tamanho inválido para digest %s: esperado %d bytes, recebido %d bytes.",
+                            digestName, expectedDigestLengthBytes, digest.length)
+            );
+        }
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/crypto/SigningService.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/crypto/SigningService.java
new file mode 100644
index 0000000..73b6496
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/crypto/SigningService.java
@@ -0,0 +1,169 @@
+package br.com.cybercore.signer.core.crypto;
+
+import br.com.cybercore.signer.core.domain.CertificateStatus;
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.domain.SigningContext;
+import br.com.cybercore.signer.core.domain.SigningResult;
+import br.com.cybercore.signer.core.protocol.CcspErrorCode;
+import br.com.cybercore.signer.core.provider.CertificateManager;
+import br.com.cybercore.signer.core.provider.CertificateProvider;
+import br.com.cybercore.signer.core.provider.CertificateProviderException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+
+/**
+ * Serviço central de assinatura digital do CyberCore Signer.
+ * Orquestra validações rigorosas de protocolo e algoritmos, resolução de certificados
+ * e delegação aos provedores criptográficos JCA/JCE (Windows-MY, A1, PKCS#11).
+ * Nunca implementa algoritmos criptográficos manuais e nunca expõe a chave privada.
+ */
+public class SigningService {
+
+    private static final Logger logger = LoggerFactory.getLogger(SigningService.class);
+
+    private final CertificateManager certificateManager;
+
+    public SigningService(CertificateManager certificateManager) {
+        this.certificateManager = Objects.requireNonNull(certificateManager, "certificateManager must not be null");
+    }
+
+    /**
+     * Executa a assinatura digital local de um digest fornecido por uma aplicação autorizada.
+     *
+     * @param context Contexto da requisição contendo digest, algoritmo, ID da requisição e certificado indicado.
+     * @return Resultado imutável da assinatura com os bytes assinados e certificados em Base64.
+     * @throws CertificateProviderException Se qualquer validação, dispositivo ou operação criptográfica falhar.
+     */
+    public SigningResult sign(SigningContext context) throws CertificateProviderException {
+        Objects.requireNonNull(context, "Contexto de assinatura não pode ser nulo.");
+
+        if (context.requestId() == null || context.requestId().isBlank()) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.SIGNATURE_FAILED,
+                    "O campo 'request_id' é obrigatório para correlação de assinatura."
+            );
+        }
+
+        // 1. Validação de algoritmo suportado e tamanho do digest
+        DigestAlgorithm algorithm = DigestAlgorithm.fromName(context.algorithm());
+        algorithm.validateDigestLength(context.digest());
+
+        // 2. Resolução do certificado alvo
+        ManagedCertificate targetCertificate = resolveCertificate(context.certificateHint());
+
+        // 3. Validação do ciclo de vida e disponibilidade de chave privada
+        validateCertificateState(targetCertificate);
+
+        // 4. Obtenção do provedor responsável
+        CertificateProvider provider = certificateManager.getProviderForCertificate(targetCertificate.id());
+        if (provider == null || !provider.isAvailable()) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.PROVIDER_NOT_AVAILABLE,
+                    "O provedor para o certificado '" + targetCertificate.alias() + "' não está disponível no sistema."
+            );
+        }
+
+        logger.info("Assinando digest para requestId='{}', appId='{}', cert='{}', provider='{}', alg='{}'",
+                context.requestId(), context.applicationId(), targetCertificate.alias(),
+                provider.getProviderId(), algorithm.getJcaName());
+
+        // Se o contexto não tiver hint explícito, utiliza o ID do certificado resolvido
+        SigningContext effectiveContext = (context.certificateHint() == null || context.certificateHint().isBlank())
+                ? new SigningContext(context.requestId(), context.applicationId(), context.digest(),
+                context.algorithm(), targetCertificate.id(), context.requestedAt())
+                : context;
+
+        // 5. Execução no provedor JCA/JCE
+        SigningResult result = provider.sign(effectiveContext);
+
+        if (result == null || result.signatureBytes() == null || result.signatureBytes().length == 0) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.SIGNATURE_FAILED,
+                    "O provedor retornou uma assinatura nula ou vazia."
+            );
+        }
+
+        logger.info("Assinatura digital concluída com sucesso para requestId='{}'. Tamanho assinatura: {} bytes",
+                context.requestId(), result.signatureBytes().length);
+
+        return result;
+    }
+
+    private ManagedCertificate resolveCertificate(String hint) throws CertificateProviderException {
+        if (hint != null && !hint.isBlank()) {
+            Optional<ManagedCertificate> found = certificateManager.findByHint(hint);
+            if (found.isEmpty()) {
+                // Tenta rediscovery caso um token tenha acabado de ser conectado
+                certificateManager.discoverCertificates();
+                found = certificateManager.findByHint(hint);
+            }
+            if (found.isPresent()) {
+                return found.get();
+            }
+            throw new CertificateProviderException(
+                    CcspErrorCode.CERTIFICATE_NOT_FOUND,
+                    "Nenhum certificado encontrado para o identificador ou hint: " + hint
+            );
+        }
+
+        // Sem hint: seleciona automaticamente se houver apenas um certificado operacional disponível
+        List<ManagedCertificate> available = certificateManager.getAvailableCertificates();
+        if (available.isEmpty()) {
+            // Tenta redescobrir
+            certificateManager.discoverCertificates();
+            available = certificateManager.getAvailableCertificates();
+        }
+
+        if (available.isEmpty()) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.CERTIFICATE_NOT_FOUND,
+                    "Nenhum certificado com chave privada disponível foi encontrado na máquina."
+            );
+        }
+
+        if (available.size() == 1) {
+            return available.get(0);
+        }
+
+        throw new CertificateProviderException(
+                CcspErrorCode.CERTIFICATE_NOT_FOUND,
+                "Existem múltiplos certificados disponíveis (" + available.size() +
+                        "). Especifique o 'certificate_hint' para selecionar o certificado desejado."
+        );
+    }
+
+    private void validateCertificateState(ManagedCertificate cert) throws CertificateProviderException {
+        if (cert.status() == CertificateStatus.EXPIRED) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.CERTIFICATE_EXPIRED,
+                    "O certificado '" + cert.alias() + "' está expirado desde " + cert.notAfter()
+            );
+        }
+        if (cert.status() == CertificateStatus.NOT_YET_VALID) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.CERTIFICATE_INVALID,
+                    "O certificado '" + cert.alias() + "' ainda não é válido. Início da validade: " + cert.notBefore()
+            );
+        }
+        if (cert.status() == CertificateStatus.NO_PRIVATE_KEY) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.PRIVATE_KEY_NOT_AVAILABLE,
+                    "O certificado '" + cert.alias() + "' não possui chave privada acessível para assinatura."
+            );
+        }
+        if (cert.status() == CertificateStatus.REVOKED) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.CERTIFICATE_INVALID,
+                    "O certificado '" + cert.alias() + "' consta como revogado."
+            );
+        }
+    }
+
+    public CertificateManager getCertificateManager() {
+        return certificateManager;
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/crypto/X509CertificateUtils.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/crypto/X509CertificateUtils.java
new file mode 100644
index 0000000..d0d90ee
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/crypto/X509CertificateUtils.java
@@ -0,0 +1,230 @@
+package br.com.cybercore.signer.core.crypto;
+
+import br.com.cybercore.signer.core.domain.CertificateStatus;
+import br.com.cybercore.signer.core.domain.CertificateType;
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.ByteArrayInputStream;
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.security.cert.CertificateEncodingException;
+import java.security.cert.CertificateException;
+import java.security.cert.CertificateFactory;
+import java.security.cert.X509Certificate;
+import java.time.Instant;
+import java.util.Collection;
+import java.util.HexFormat;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * Utilitários para parsing, inspeção e extração de metadados de certificados X.509
+ * com suporte nativo a extensões da Infraestrutura de Chaves Públicas Brasileira (ICP-Brasil).
+ */
+public final class X509CertificateUtils {
+
+    private static final Logger logger = LoggerFactory.getLogger(X509CertificateUtils.class);
+
+    private static final Pattern CN_PATTERN = Pattern.compile("CN=([^,]+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern CPF_PATTERN = Pattern.compile("(\\d{11})");
+    private static final Pattern CNPJ_PATTERN = Pattern.compile("(\\d{14})");
+
+    private X509CertificateUtils() {
+        // Utilitário estático
+    }
+
+    /**
+     * Decodifica um certificado X.509 a partir de bytes codificados (DER ou PEM).
+     */
+    public static X509Certificate parseCertificate(byte[] encoded) throws CertificateException {
+        CertificateFactory factory = CertificateFactory.getInstance("X.509");
+        return (X509Certificate) factory.generateCertificate(new ByteArrayInputStream(encoded));
+    }
+
+    /**
+     * Converte um X509Certificate em um ManagedCertificate imutável de domínio.
+     */
+    public static ManagedCertificate toManagedCertificate(
+            String id,
+            String alias,
+            X509Certificate cert,
+            CertificateType type,
+            boolean hasPrivateKey,
+            String providerId,
+            String hardwareDeviceName
+    ) {
+        String subject = cert.getSubjectX500Principal().getName();
+        String issuer = cert.getIssuerX500Principal().getName();
+        String serial = cert.getSerialNumber().toString(16).toUpperCase();
+
+        Instant notBefore = cert.getNotBefore().toInstant();
+        Instant notAfter = cert.getNotAfter().toInstant();
+        Instant now = Instant.now();
+
+        CertificateStatus status;
+        if (!hasPrivateKey) {
+            status = CertificateStatus.NO_PRIVATE_KEY;
+        } else if (now.isBefore(notBefore)) {
+            status = CertificateStatus.NOT_YET_VALID;
+        } else if (now.isAfter(notAfter)) {
+            status = CertificateStatus.EXPIRED;
+        } else {
+            status = CertificateStatus.AVAILABLE;
+        }
+
+        String cn = extractCommonName(subject);
+        String sha1 = calculateFingerprint(cert, "SHA-1");
+        String sha256 = calculateFingerprint(cert, "SHA-256");
+
+        String cpf = extractCpf(cert, cn);
+        String cnpj = extractCnpj(cert, cn);
+
+        int keySize = extractKeySize(cert);
+        String alg = cert.getPublicKey().getAlgorithm();
+
+        return new ManagedCertificate(
+                id,
+                alias,
+                type,
+                status,
+                subject,
+                issuer,
+                serial,
+                sha1,
+                sha256,
+                notBefore,
+                notAfter,
+                alg,
+                keySize,
+                cn,
+                cpf,
+                cnpj,
+                providerId,
+                hardwareDeviceName
+        );
+    }
+
+    public static String extractCommonName(String dn) {
+        if (dn == null) return "Desconhecido";
+        Matcher matcher = CN_PATTERN.matcher(dn);
+        if (matcher.find()) {
+            return matcher.group(1).trim();
+        }
+        return dn;
+    }
+
+    public static String calculateFingerprint(X509Certificate cert, String algorithm) {
+        try {
+            MessageDigest md = MessageDigest.getInstance(algorithm);
+            byte[] digest = md.digest(cert.getEncoded());
+            return HexFormat.ofDelimiter(":").formatHex(digest).toUpperCase();
+        } catch (NoSuchAlgorithmException | CertificateEncodingException e) {
+            logger.debug("Não foi possível calcular fingerprint {} do certificado: {}", algorithm, e.getMessage());
+            return "";
+        }
+    }
+
+    private static int extractKeySize(X509Certificate cert) {
+        try {
+            String alg = cert.getPublicKey().getAlgorithm();
+            if ("RSA".equalsIgnoreCase(alg)) {
+                java.security.interfaces.RSAPublicKey rsa = (java.security.interfaces.RSAPublicKey) cert.getPublicKey();
+                return rsa.getModulus().bitLength();
+            } else if ("EC".equalsIgnoreCase(alg) || "ECDSA".equalsIgnoreCase(alg)) {
+                java.security.interfaces.ECPublicKey ec = (java.security.interfaces.ECPublicKey) cert.getPublicKey();
+                return ec.getParams().getCurve().getField().getFieldSize();
+            }
+        } catch (Exception ignored) {
+            // Se falhar em extrair tamanho específico da chave, retorna 0
+        }
+        return 0;
+    }
+
+    /**
+     * Tenta extrair CPF do certificado (via ICP-Brasil SAN ou padrão comum no CN: "NOME:12345678901").
+     */
+    public static String extractCpf(X509Certificate cert, String commonName) {
+        // Tenta padrão CN ICP-Brasil comum ("FULANO DE TAL:00011122233")
+        if (commonName != null && commonName.contains(":")) {
+            String[] parts = commonName.split(":");
+            if (parts.length > 1) {
+                String candidate = parts[parts.length - 1].trim();
+                if (CPF_PATTERN.matcher(candidate).matches()) {
+                    return candidate;
+                }
+            }
+        }
+
+        // Tenta SubjectAlternativeNames
+        try {
+            Collection<List<?>> sans = cert.getSubjectAlternativeNames();
+            if (sans != null) {
+                for (List<?> item : sans) {
+                    if (item.size() >= 2 && item.get(1) instanceof byte[] bytes) {
+                        String content = new String(bytes, StandardCharsets.ISO_8859_1);
+                        Matcher m = CPF_PATTERN.matcher(content);
+                        if (m.find()) {
+                            return m.group(1);
+                        }
+                    }
+                }
+            }
+        } catch (Exception ignored) {
+            // SAN não disponível ou inacessível
+        }
+        return null;
+    }
+
+    /**
+     * Tenta extrair CNPJ do certificado para pessoas jurídicas.
+     */
+    public static String extractCnpj(X509Certificate cert, String commonName) {
+        if (commonName != null && commonName.contains(":")) {
+            String[] parts = commonName.split(":");
+            if (parts.length > 1) {
+                String candidate = parts[parts.length - 1].trim();
+                if (CNPJ_PATTERN.matcher(candidate).matches()) {
+                    return candidate;
+                }
+            }
+        }
+
+        try {
+            Collection<List<?>> sans = cert.getSubjectAlternativeNames();
+            if (sans != null) {
+                for (List<?> item : sans) {
+                    if (item.size() >= 2 && item.get(1) instanceof byte[] bytes) {
+                        String content = new String(bytes, StandardCharsets.ISO_8859_1);
+                        Matcher m = CNPJ_PATTERN.matcher(content);
+                        if (m.find()) {
+                            return m.group(1);
+                        }
+                    }
+                }
+            }
+        } catch (Exception ignored) {
+            // SAN não disponível ou inacessível
+        }
+        return null;
+    }
+
+    /**
+     * Extrai o nome amigável do titular (removendo sufixo :CPF ou :CNPJ comum em ICP-Brasil).
+     */
+    public static String extractHolderName(String commonName) {
+        if (commonName == null || commonName.isBlank()) {
+            return "Titular do Certificado";
+        }
+        if (commonName.contains(":")) {
+            String[] parts = commonName.split(":");
+            if (parts.length > 0 && !parts[0].isBlank()) {
+                return parts[0].trim();
+            }
+        }
+        return commonName.trim();
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/diagnostics/DiagnosticReport.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/diagnostics/DiagnosticReport.java
new file mode 100644
index 0000000..63e60ab
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/diagnostics/DiagnosticReport.java
@@ -0,0 +1,51 @@
+package br.com.cybercore.signer.core.diagnostics;
+
+import java.io.Serializable;
+import java.time.Instant;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Relatório consolidado de integridade e diagnósticos do CyberCore Signer.
+ */
+public record DiagnosticReport(
+        Instant generatedAt,
+        String osName,
+        String osVersion,
+        String osArch,
+        String javaVersion,
+        String javaVendor,
+        String javaRuntime,
+        boolean isWindows,
+        boolean cryptoEngineOk,
+        List<String> registeredSecurityProviders,
+        boolean windowsStoreSupported,
+        boolean pkcs11ModuleAvailable,
+        int totalCertificatesFound,
+        int a1CertificatesCount,
+        int a3CertificatesCount,
+        boolean localServerRunning,
+        int localServerPort,
+        Map<String, String> additionalDetails
+) implements Serializable {
+
+    public DiagnosticReport {
+        registeredSecurityProviders = registeredSecurityProviders != null
+                ? List.copyOf(registeredSecurityProviders)
+                : Collections.emptyList();
+        additionalDetails = additionalDetails != null
+                ? Map.copyOf(additionalDetails)
+                : Collections.emptyMap();
+    }
+
+    @Override
+    public List<String> registeredSecurityProviders() {
+        return Collections.unmodifiableList(registeredSecurityProviders);
+    }
+
+    @Override
+    public Map<String, String> additionalDetails() {
+        return Collections.unmodifiableMap(additionalDetails);
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/diagnostics/DiagnosticService.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/diagnostics/DiagnosticService.java
new file mode 100644
index 0000000..48a6934
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/diagnostics/DiagnosticService.java
@@ -0,0 +1,87 @@
+package br.com.cybercore.signer.core.diagnostics;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.security.Provider;
+import java.security.Security;
+import java.security.Signature;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Serviço responsável por verificar as capacidades do sistema, JVM e engines criptográficas.
+ */
+public class DiagnosticService {
+
+    private static final Logger logger = LoggerFactory.getLogger(DiagnosticService.class);
+
+    public DiagnosticReport runDiagnostic() {
+        logger.info("Iniciando diagnóstico do ambiente e engine criptográfica...");
+
+        String osName = System.getProperty("os.name", "Desconhecido");
+        String osVersion = System.getProperty("os.version", "Desconhecido");
+        String osArch = System.getProperty("os.arch", "Desconhecido");
+        boolean isWindows = osName.toLowerCase().contains("win");
+
+        String javaVersion = System.getProperty("java.version", "Desconhecido");
+        String javaVendor = System.getProperty("java.vendor", "Desconhecido");
+        String javaRuntime = System.getProperty("java.runtime.name", "Desconhecido");
+
+        List<String> providersList = new ArrayList<>();
+        boolean windowsStoreSupported = false;
+        boolean pkcs11ModuleAvailable = false;
+
+        for (Provider p : Security.getProviders()) {
+            providersList.add(p.getName() + " v" + p.getVersionStr());
+            if ("SunMSCAPI".equalsIgnoreCase(p.getName())) {
+                windowsStoreSupported = true;
+            }
+            if ("SunPKCS11".equalsIgnoreCase(p.getName())) {
+                pkcs11ModuleAvailable = true;
+            }
+        }
+
+        boolean cryptoEngineOk = verifyCryptoAlgorithms();
+
+        Map<String, String> details = new HashMap<>();
+        details.put("VirtualThreadsSupported", "true");
+        details.put("DefaultEncoding", System.getProperty("file.encoding", "UTF-8"));
+
+        return new DiagnosticReport(
+                Instant.now(),
+                osName,
+                osVersion,
+                osArch,
+                javaVersion,
+                javaVendor,
+                javaRuntime,
+                isWindows,
+                cryptoEngineOk,
+                providersList,
+                windowsStoreSupported,
+                pkcs11ModuleAvailable,
+                0,
+                0,
+                0,
+                false,
+                39741,
+                details
+        );
+    }
+
+    private boolean verifyCryptoAlgorithms() {
+        try {
+            Signature.getInstance("SHA256withRSA");
+            Signature.getInstance("SHA384withRSA");
+            Signature.getInstance("SHA512withRSA");
+            return true;
+        } catch (Exception e) {
+            logger.error("Falha ao inicializar algoritmos padrão JCA/JCE: {}", e.getMessage());
+            return false;
+        }
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/domain/CertificateStatus.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/domain/CertificateStatus.java
new file mode 100644
index 0000000..3d5f83f
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/domain/CertificateStatus.java
@@ -0,0 +1,30 @@
+package br.com.cybercore.signer.core.domain;
+
+/**
+ * Estado de validade e disponibilidade de um certificado.
+ */
+public enum CertificateStatus {
+    AVAILABLE("Disponível", true),
+    EXPIRED("Expirado", false),
+    NOT_YET_VALID("Ainda não válido", false),
+    NO_PRIVATE_KEY("Sem chave privada", false),
+    TOKEN_DISCONNECTED("Token desconectado", false),
+    REVOKED("Revogado", false),
+    UNKNOWN("Desconhecido", false);
+
+    private final String description;
+    private final boolean usableForSigning;
+
+    CertificateStatus(String description, boolean usableForSigning) {
+        this.description = description;
+        this.usableForSigning = usableForSigning;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public boolean isUsableForSigning() {
+        return usableForSigning;
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/domain/CertificateType.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/domain/CertificateType.java
new file mode 100644
index 0000000..6e6f1b2
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/domain/CertificateType.java
@@ -0,0 +1,32 @@
+package br.com.cybercore.signer.core.domain;
+
+/**
+ * Tipo de certificado digital suportado pelo CyberCore Signer.
+ */
+public enum CertificateType {
+    /**
+     * Certificado em software (.pfx / .p12).
+     */
+    A1("A1", "Certificado Local"),
+
+    /**
+     * Certificado em hardware (Smart Card / Token USB / PKCS#11 / Windows Store).
+     */
+    A3("A3", "Token / Smart Card");
+
+    private final String code;
+    private final String label;
+
+    CertificateType(String code, String label) {
+        this.code = code;
+        this.label = label;
+    }
+
+    public String getCode() {
+        return code;
+    }
+
+    public String getLabel() {
+        return label;
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/domain/ManagedCertificate.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/domain/ManagedCertificate.java
new file mode 100644
index 0000000..303d158
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/domain/ManagedCertificate.java
@@ -0,0 +1,56 @@
+package br.com.cybercore.signer.core.domain;
+
+import java.io.Serializable;
+import java.time.Instant;
+import java.util.Objects;
+
+/**
+ * Representação imutável de um certificado digital gerenciado pelo CyberCore Signer.
+ * Contém apenas metadados públicos e nunca expõe referências diretas de chave privada.
+ */
+public record ManagedCertificate(
+        String id,
+        String alias,
+        CertificateType type,
+        CertificateStatus status,
+        String subjectDn,
+        String issuerDn,
+        String serialNumber,
+        String sha1Fingerprint,
+        String sha256Fingerprint,
+        Instant notBefore,
+        Instant notAfter,
+        String algorithm,
+        int keySize,
+        String commonName,
+        String cpf,
+        String cnpj,
+        String providerId,
+        String hardwareDeviceName
+) implements Serializable {
+
+    public ManagedCertificate {
+        Objects.requireNonNull(id, "id must not be null");
+        Objects.requireNonNull(alias, "alias must not be null");
+        Objects.requireNonNull(type, "type must not be null");
+        Objects.requireNonNull(status, "status must not be null");
+        Objects.requireNonNull(subjectDn, "subjectDn must not be null");
+        Objects.requireNonNull(issuerDn, "issuerDn must not be null");
+    }
+
+    /**
+     * Verifica se o certificado está atualmente dentro do período de validade temporal.
+     */
+    public boolean isCurrentlyValid() {
+        Instant now = Instant.now();
+        return (notBefore == null || !now.isBefore(notBefore))
+                && (notAfter == null || !now.isAfter(notAfter));
+    }
+
+    /**
+     * Verifica se o certificado está apto a assinar.
+     */
+    public boolean canSign() {
+        return status.isUsableForSigning() && isCurrentlyValid();
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/domain/SigningContext.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/domain/SigningContext.java
new file mode 100644
index 0000000..0ced061
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/domain/SigningContext.java
@@ -0,0 +1,55 @@
+package br.com.cybercore.signer.core.domain;
+
+import java.time.Instant;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * Contexto da operação de assinatura a ser processada pelo SigningService / CertificateProvider.
+ */
+public record SigningContext(
+        String requestId,
+        String applicationId,
+        byte[] digest,
+        String algorithm,
+        String certificateHint,
+        Instant requestedAt
+) {
+    public SigningContext {
+        Objects.requireNonNull(requestId, "requestId must not be null");
+        Objects.requireNonNull(applicationId, "applicationId must not be null");
+        Objects.requireNonNull(digest, "digest must not be null");
+        Objects.requireNonNull(algorithm, "algorithm must not be null");
+        digest = digest.clone();
+        if (requestedAt == null) {
+            requestedAt = Instant.now();
+        }
+    }
+
+    @Override
+    public byte[] digest() {
+        return digest.clone();
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        SigningContext that = (SigningContext) o;
+        return Objects.equals(requestId, that.requestId)
+                && Objects.equals(applicationId, that.applicationId)
+                && Arrays.equals(digest, that.digest)
+                && Objects.equals(algorithm, that.algorithm)
+                && Objects.equals(certificateHint, that.certificateHint)
+                && Objects.equals(requestedAt, that.requestedAt);
+    }
+
+    @Override
+    public int hashCode() {
+        int result = Objects.hash(requestId, applicationId, algorithm, certificateHint, requestedAt);
+        result = 31 * result + Arrays.hashCode(digest);
+        return result;
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/domain/SigningKeyMaterial.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/domain/SigningKeyMaterial.java
new file mode 100644
index 0000000..66a0496
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/domain/SigningKeyMaterial.java
@@ -0,0 +1,38 @@
+package br.com.cybercore.signer.core.domain;
+
+import java.security.PrivateKey;
+import java.security.Provider;
+import java.security.cert.X509Certificate;
+import java.util.Arrays;
+import java.util.Objects;
+
+/**
+ * Contêiner seguro para material criptográfico de assinatura (chave privada e cadeia X.509).
+ * Permite que serviços de alto nível (PDF/PAdES e XMLDSig) realizem assinaturas estruturadas.
+ * A chave privada e a cadeia permanecem estritamente na máquina local do usuário.
+ */
+public record SigningKeyMaterial(
+        PrivateKey privateKey,
+        X509Certificate[] certificateChain,
+        Provider jcaProvider
+) {
+
+    public SigningKeyMaterial {
+        Objects.requireNonNull(privateKey, "Chave privada não pode ser nula.");
+        Objects.requireNonNull(certificateChain, "Cadeia de certificados não pode ser nula.");
+        if (certificateChain.length == 0) {
+            throw new IllegalArgumentException("A cadeia de certificados deve conter ao menos um certificado.");
+        }
+        // Cópia defensiva
+        certificateChain = Arrays.copyOf(certificateChain, certificateChain.length);
+    }
+
+    public X509Certificate signingCertificate() {
+        return certificateChain[0];
+    }
+
+    @Override
+    public X509Certificate[] certificateChain() {
+        return Arrays.copyOf(certificateChain, certificateChain.length);
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/domain/SigningResult.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/domain/SigningResult.java
new file mode 100644
index 0000000..4ff73c3
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/domain/SigningResult.java
@@ -0,0 +1,63 @@
+package br.com.cybercore.signer.core.domain;
+
+import java.time.Instant;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * Resultado da operação de assinatura digital.
+ */
+public record SigningResult(
+        String requestId,
+        byte[] signatureBytes,
+        String certificateBase64,
+        List<String> certificateChainBase64,
+        String algorithm,
+        Instant signedAt
+) {
+    public SigningResult {
+        Objects.requireNonNull(requestId, "requestId must not be null");
+        Objects.requireNonNull(signatureBytes, "signatureBytes must not be null");
+        Objects.requireNonNull(certificateBase64, "certificateBase64 must not be null");
+        Objects.requireNonNull(algorithm, "algorithm must not be null");
+        signatureBytes = signatureBytes.clone();
+        certificateChainBase64 = certificateChainBase64 != null
+                ? List.copyOf(certificateChainBase64)
+                : Collections.singletonList(certificateBase64);
+        if (signedAt == null) {
+            signedAt = Instant.now();
+        }
+    }
+
+    @Override
+    public byte[] signatureBytes() {
+        return signatureBytes.clone();
+    }
+
+    @Override
+    public List<String> certificateChainBase64() {
+        return Collections.unmodifiableList(certificateChainBase64);
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        SigningResult that = (SigningResult) o;
+        return Objects.equals(requestId, that.requestId)
+                && Arrays.equals(signatureBytes, that.signatureBytes)
+                && Objects.equals(certificateBase64, that.certificateBase64)
+                && Objects.equals(certificateChainBase64, that.certificateChainBase64)
+                && Objects.equals(algorithm, that.algorithm)
+                && Objects.equals(signedAt, that.signedAt);
+    }
+
+    @Override
+    public int hashCode() {
+        int result = Objects.hash(requestId, certificateBase64, certificateChainBase64, algorithm, signedAt);
+        result = 31 * result + Arrays.hashCode(signatureBytes);
+        return result;
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/PdfSealPageChoice.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/PdfSealPageChoice.java
new file mode 100644
index 0000000..930803a
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/PdfSealPageChoice.java
@@ -0,0 +1,20 @@
+package br.com.cybercore.signer.core.pdf;
+
+/**
+ * Seleção da página do PDF na qual o selo visual da assinatura digital será carimbado.
+ */
+public enum PdfSealPageChoice {
+    LAST_PAGE("Última Página (Recomendado)"),
+    FIRST_PAGE("Primeira Página"),
+    ALL_PAGES("Todas as Páginas");
+
+    private final String description;
+
+    PdfSealPageChoice(String description) {
+        this.description = description;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/PdfSealPosition.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/PdfSealPosition.java
new file mode 100644
index 0000000..15f70d8
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/PdfSealPosition.java
@@ -0,0 +1,22 @@
+package br.com.cybercore.signer.core.pdf;
+
+/**
+ * Posição do selo visual de assinatura na página do documento PDF.
+ */
+public enum PdfSealPosition {
+    BOTTOM_RIGHT("Canto Inferior Direito"),
+    BOTTOM_LEFT("Canto Inferior Esquerdo"),
+    TOP_RIGHT("Canto Superior Direito"),
+    TOP_LEFT("Canto Superior Esquerdo"),
+    CUSTOM("Posição Personalizada por Clique na Página");
+
+    private final String description;
+
+    PdfSealPosition(String description) {
+        this.description = description;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/PdfSignatureOptions.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/PdfSignatureOptions.java
new file mode 100644
index 0000000..a133c18
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/PdfSignatureOptions.java
@@ -0,0 +1,186 @@
+package br.com.cybercore.signer.core.pdf;
+
+import br.com.cybercore.signer.core.pdf.seal.CpfDisplayMode;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealTheme;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealThemeRegistry;
+
+import java.util.Objects;
+
+/**
+ * Parâmetros de configuração para a operação de assinatura digital PAdES com selo visual em PDF,
+ * incluindo suporte a posicionamento predefinido ou coordenadas personalizadas na página,
+ * e preferências granulares para exibição de CPF e data/hora.
+ */
+public record PdfSignatureOptions(
+        String certificateId,
+        char[] pinOrPassword,
+        boolean visibleSeal,
+        PdfSealTheme sealTheme,
+        PdfSealPosition position,
+        PdfSealPageChoice pageChoice,
+        String reason,
+        String location,
+        Float customX,
+        Float customY,
+        Integer targetPageNumber,
+        CpfDisplayMode cpfDisplayMode,
+        Boolean includeDateTime,
+        String customExtraInfo
+) {
+
+    public PdfSignatureOptions {
+        Objects.requireNonNull(certificateId, "ID do certificado não pode ser nulo.");
+        if (sealTheme == null) {
+            sealTheme = PdfSealThemeRegistry.getDefaultTheme();
+        }
+        if (position == null) {
+            position = (customX != null && customY != null) ? PdfSealPosition.CUSTOM : PdfSealPosition.BOTTOM_RIGHT;
+        }
+        if (pageChoice == null) {
+            pageChoice = PdfSealPageChoice.LAST_PAGE;
+        }
+        if (reason == null || reason.isBlank()) {
+            reason = "Assinatura Digital de Documento";
+        }
+        if (location == null || location.isBlank()) {
+            location = "Brasil";
+        }
+        if (cpfDisplayMode == null) {
+            cpfDisplayMode = (sealTheme.defaultCpfMode() != null) ? sealTheme.defaultCpfMode() : CpfDisplayMode.FULL;
+        }
+        if (includeDateTime == null) {
+            includeDateTime = sealTheme.defaultIncludeDateTime();
+        }
+    }
+
+    /**
+     * Construtor para compatibilidade com assinaturas anteriores a customExtraInfo.
+     */
+    public PdfSignatureOptions(String certificateId, char[] pinOrPassword, boolean visibleSeal,
+                               PdfSealTheme sealTheme, PdfSealPosition position, PdfSealPageChoice pageChoice,
+                               String reason, String location, Float customX, Float customY,
+                               Integer targetPageNumber, CpfDisplayMode cpfDisplayMode, Boolean includeDateTime) {
+        this(certificateId, pinOrPassword, visibleSeal, sealTheme, position, pageChoice, reason, location,
+                customX, customY, targetPageNumber, cpfDisplayMode, includeDateTime, null);
+    }
+
+    /**
+     * Construtor de compatibilidade para assinatura com posições pré-fixadas por enum.
+     */
+    public PdfSignatureOptions(String certificateId, char[] pinOrPassword, boolean visibleSeal,
+                               PdfSealTheme sealTheme, PdfSealPosition position, PdfSealPageChoice pageChoice,
+                               String reason, String location) {
+        this(certificateId, pinOrPassword, visibleSeal, sealTheme, position, pageChoice, reason, location, null, null, null, null, null, null);
+    }
+
+    public PdfSignatureOptions(String certificateId, char[] pinOrPassword, boolean visibleSeal,
+                               PdfSealTheme sealTheme, PdfSealPosition position, PdfSealPageChoice pageChoice,
+                               String reason, String location, Float customX, Float customY, Integer targetPageNumber) {
+        this(certificateId, pinOrPassword, visibleSeal, sealTheme, position, pageChoice, reason, location, customX, customY, targetPageNumber, null, null, null);
+    }
+
+    public static Builder builder(String certificateId) {
+        return new Builder(certificateId);
+    }
+
+    public static final class Builder {
+        private final String certificateId;
+        private char[] pinOrPassword;
+        private boolean visibleSeal = true;
+        private PdfSealTheme sealTheme;
+        private PdfSealPosition position = PdfSealPosition.BOTTOM_RIGHT;
+        private PdfSealPageChoice pageChoice = PdfSealPageChoice.LAST_PAGE;
+        private String reason = "Assinatura Digital ICP-Brasil";
+        private String location = "Brasil";
+        private Float customX;
+        private Float customY;
+        private Integer targetPageNumber;
+        private CpfDisplayMode cpfDisplayMode;
+        private Boolean includeDateTime;
+
+        public Builder(String certificateId) {
+            this.certificateId = Objects.requireNonNull(certificateId);
+        }
+
+        public Builder pinOrPassword(char[] pin) {
+            this.pinOrPassword = pin;
+            return this;
+        }
+
+        public Builder visibleSeal(boolean visible) {
+            this.visibleSeal = visible;
+            return this;
+        }
+
+        public Builder sealTheme(PdfSealTheme theme) {
+            this.sealTheme = theme;
+            return this;
+        }
+
+        public Builder position(PdfSealPosition pos) {
+            this.position = pos;
+            return this;
+        }
+
+        public Builder pageChoice(PdfSealPageChoice choice) {
+            this.pageChoice = choice;
+            return this;
+        }
+
+        public Builder reason(String reason) {
+            this.reason = reason;
+            return this;
+        }
+
+        public Builder location(String location) {
+            this.location = location;
+            return this;
+        }
+
+        public Builder cpfDisplayMode(CpfDisplayMode mode) {
+            this.cpfDisplayMode = mode;
+            return this;
+        }
+
+        private String customExtraInfo;
+
+        public Builder includeDateTime(boolean include) {
+            this.includeDateTime = include;
+            return this;
+        }
+
+        public Builder customExtraInfo(String info) {
+            this.customExtraInfo = info;
+            return this;
+        }
+
+        public Builder customPosition(Float x, Float y, Integer pageNumber) {
+            this.customX = x;
+            this.customY = y;
+            this.targetPageNumber = pageNumber;
+            if (x != null && y != null) {
+                this.position = PdfSealPosition.CUSTOM;
+            }
+            return this;
+        }
+
+        public PdfSignatureOptions build() {
+            return new PdfSignatureOptions(
+                    certificateId,
+                    pinOrPassword,
+                    visibleSeal,
+                    sealTheme,
+                    position,
+                    pageChoice,
+                    reason,
+                    location,
+                    customX,
+                    customY,
+                    targetPageNumber,
+                    cpfDisplayMode,
+                    includeDateTime,
+                    customExtraInfo
+            );
+        }
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/PdfSigningService.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/PdfSigningService.java
new file mode 100644
index 0000000..d895faa
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/PdfSigningService.java
@@ -0,0 +1,351 @@
+package br.com.cybercore.signer.core.pdf;
+
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.domain.SigningKeyMaterial;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealData;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealRenderer;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealTheme;
+import br.com.cybercore.signer.core.protocol.CcspErrorCode;
+import br.com.cybercore.signer.core.provider.CertificateManager;
+import br.com.cybercore.signer.core.provider.CertificateProviderException;
+import org.apache.pdfbox.Loader;
+import org.apache.pdfbox.pdmodel.PDDocument;
+import org.apache.pdfbox.pdmodel.PDPage;
+import org.apache.pdfbox.pdmodel.PDPageContentStream;
+import org.apache.pdfbox.pdmodel.common.PDRectangle;
+import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;
+import org.apache.pdfbox.pdmodel.interactive.digitalsignature.PDSignature;
+import org.apache.pdfbox.pdmodel.interactive.digitalsignature.SignatureInterface;
+import org.apache.pdfbox.rendering.PDFRenderer;
+import org.bouncycastle.cert.jcajce.JcaCertStore;
+import org.bouncycastle.cms.CMSProcessableByteArray;
+import org.bouncycastle.cms.CMSSignedData;
+import org.bouncycastle.cms.CMSSignedDataGenerator;
+import org.bouncycastle.cms.CMSTypedData;
+import org.bouncycastle.cms.jcajce.JcaSignerInfoGeneratorBuilder;
+import org.bouncycastle.operator.ContentSigner;
+import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder;
+import org.bouncycastle.operator.jcajce.JcaDigestCalculatorProviderBuilder;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.file.Files;
+import java.security.MessageDigest;
+import java.security.cert.X509Certificate;
+import java.time.Instant;
+import java.time.ZoneId;
+import java.time.format.DateTimeFormatter;
+import java.util.Arrays;
+import java.util.Calendar;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+
+/**
+ * Serviço de alto nível para Assinatura Digital de Documentos PDF no padrão PAdES (PDF Advanced Electronic Signatures),
+ * com suporte à aplicação de Selos Visuais estilizados por Temas SVG, posicionamento livre por clique na página e renderização de previews.
+ */
+public class PdfSigningService {
+
+    private static final Logger logger = LoggerFactory.getLogger(PdfSigningService.class);
+    private static final DateTimeFormatter DATE_TIME_FORMATTER = DateTimeFormatter.ofPattern("dd/MM/yyyy HH:mm:ss")
+            .withZone(ZoneId.systemDefault());
+
+    private final CertificateManager certificateManager;
+
+    public PdfSigningService(CertificateManager certificateManager) {
+        this.certificateManager = Objects.requireNonNull(certificateManager, "CertificateManager não pode ser nulo.");
+    }
+
+    /**
+     * Retorna a quantidade total de páginas contidas no documento PDF.
+     */
+    public static int getPageCount(byte[] pdfBytes) throws IOException {
+        Objects.requireNonNull(pdfBytes, "Bytes do PDF não podem ser nulos.");
+        try (PDDocument doc = Loader.loadPDF(pdfBytes)) {
+            return doc.getNumberOfPages();
+        }
+    }
+
+    /**
+     * Renderiza uma página específica do PDF para BufferedImage na resolução DPI informada.
+     */
+    public static BufferedImage renderPageImage(byte[] pdfBytes, int pageIndex0Based, float dpi) throws IOException {
+        Objects.requireNonNull(pdfBytes, "Bytes do PDF não podem ser nulos.");
+        try (PDDocument doc = Loader.loadPDF(pdfBytes)) {
+            if (pageIndex0Based < 0 || pageIndex0Based >= doc.getNumberOfPages()) {
+                throw new IllegalArgumentException("Índice de página inválido: " + pageIndex0Based + ". Total: " + doc.getNumberOfPages());
+            }
+            PDFRenderer renderer = new PDFRenderer(doc);
+            return renderer.renderImageWithDPI(pageIndex0Based, dpi);
+        }
+    }
+
+    /**
+     * Renderiza uma página específica do PDF diretamente para bytes de imagem PNG.
+     */
+    public static byte[] renderPagePngBytes(byte[] pdfBytes, int pageIndex0Based, float dpi) throws IOException {
+        BufferedImage image = renderPageImage(pdfBytes, pageIndex0Based, dpi);
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        ImageIO.write(image, "PNG", baos);
+        return baos.toByteArray();
+    }
+
+    /**
+     * Assina digitalmente um arquivo PDF do sistema de arquivos e grava o resultado no arquivo de destino.
+     */
+    public void signPdfFile(File sourcePdf, File targetPdf, PdfSignatureOptions options) throws Exception {
+        Objects.requireNonNull(sourcePdf, "Arquivo PDF de origem não pode ser nulo.");
+        Objects.requireNonNull(targetPdf, "Arquivo PDF de destino não pode ser nulo.");
+        Objects.requireNonNull(options, "Opções de assinatura não podem ser nulas.");
+
+        byte[] inputBytes = Files.readAllBytes(sourcePdf.toPath());
+        byte[] signedBytes = signPdf(inputBytes, options);
+
+        if (targetPdf.getParentFile() != null) {
+            targetPdf.getParentFile().mkdirs();
+        }
+        try (FileOutputStream fos = new FileOutputStream(targetPdf)) {
+            fos.write(signedBytes);
+        }
+        logger.info("PDF assinado com sucesso e salvo em: {}", targetPdf.getAbsolutePath());
+    }
+
+    /**
+     * Assina digitalmente os bytes de um documento PDF, aplicando o selo visual configurado
+     * e retornando o PDF assinado completo com envelope PAdES.
+     */
+    public byte[] signPdf(byte[] pdfBytes, PdfSignatureOptions options) throws Exception {
+        Objects.requireNonNull(pdfBytes, "Bytes do PDF não podem ser nulos.");
+        Objects.requireNonNull(options, "Opções de assinatura não podem ser nulas.");
+
+        // 1. Localiza o certificado e o material criptográfico (chave e cadeia)
+        Optional<ManagedCertificate> certOpt = certificateManager.findById(options.certificateId());
+        if (certOpt.isEmpty()) {
+            certOpt = certificateManager.findByHint(options.certificateId());
+        }
+        if (certOpt.isEmpty()) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.CERTIFICATE_NOT_FOUND,
+                    "Certificado não encontrado no gerenciador para ID: " + options.certificateId()
+            );
+        }
+
+        ManagedCertificate cert = certOpt.get();
+        Optional<SigningKeyMaterial> keyMaterialOpt = certificateManager.getKeyMaterial(cert.id(), options.pinOrPassword());
+        if (keyMaterialOpt.isEmpty()) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.PRIVATE_KEY_NOT_AVAILABLE,
+                    "Chave privada inacessível para o certificado '" + cert.alias() + "'."
+            );
+        }
+        SigningKeyMaterial keyMaterial = keyMaterialOpt.get();
+
+        // 2. Prepara dados do signatário e resumo para o selo visual
+        String signerDoc = cert.cpf() != null ? "CPF: " + cert.cpf() : (cert.cnpj() != null ? "CNPJ: " + cert.cnpj() : "");
+        String issuerCn = extractIssuerCn(cert.issuerDn());
+        String signingTimeStr = DATE_TIME_FORMATTER.format(Instant.now());
+
+        MessageDigest sha256 = MessageDigest.getInstance("SHA-256");
+        byte[] pdfDigest = sha256.digest(pdfBytes);
+        String hashShort = bytesToHex(pdfDigest).substring(0, 16).toUpperCase();
+
+        PdfSealTheme theme = options.sealTheme();
+        String effectiveExtraInfo = (options.customExtraInfo() != null && !options.customExtraInfo().isBlank())
+                ? options.customExtraInfo().trim()
+                : theme.formatCustomField();
+
+        // 3. Monta dados do selo visual
+        PdfSealData sealData = new PdfSealData(
+                cert.commonName() != null ? cert.commonName() : cert.alias(),
+                signerDoc,
+                signingTimeStr,
+                issuerCn,
+                hashShort,
+                options.reason(),
+                options.location(),
+                options.cpfDisplayMode(),
+                options.includeDateTime(),
+                effectiveExtraInfo
+        );
+
+        // 4. Carrega o PDF e estampa o selo se solicitado
+        byte[] intermediatePdf;
+        if (options.visibleSeal()) {
+            byte[] sealPng = PdfSealRenderer.renderToPngBytes(theme, sealData);
+            intermediatePdf = applyVisualSealToPdf(pdfBytes, sealPng, theme, options);
+        } else {
+            intermediatePdf = pdfBytes;
+        }
+
+        // 5. Aplica a assinatura PAdES criptográfica via PDFBox e Bouncy Castle
+        ByteArrayOutputStream finalOut = new ByteArrayOutputStream();
+        try (PDDocument doc = Loader.loadPDF(intermediatePdf)) {
+            PDSignature signature = new PDSignature();
+            signature.setFilter(PDSignature.FILTER_ADOBE_PPKLITE);
+            signature.setSubFilter(PDSignature.SUBFILTER_ADBE_PKCS7_DETACHED);
+            signature.setName(cert.commonName());
+            signature.setLocation(options.location());
+            signature.setReason(options.reason());
+            signature.setSignDate(Calendar.getInstance());
+
+            SignatureInterface signer = new PadesBouncyCastleSigner(keyMaterial);
+            doc.addSignature(signature, signer);
+            doc.saveIncremental(finalOut);
+        }
+
+        logger.info("Assinatura PAdES concluída com sucesso. Tamanho final: {} bytes", finalOut.size());
+        return finalOut.toByteArray();
+    }
+
+    private byte[] applyVisualSealToPdf(byte[] pdfBytes, byte[] sealPng, PdfSealTheme theme,
+                                        PdfSignatureOptions options) throws IOException {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        try (PDDocument doc = Loader.loadPDF(pdfBytes)) {
+            int totalPages = doc.getNumberOfPages();
+            if (totalPages == 0) {
+                return pdfBytes;
+            }
+
+            PDImageXObject pdImage = PDImageXObject.createFromByteArray(doc, sealPng, "cybercore_seal");
+
+            float sealWidth = theme.width() * 0.72f;
+            float sealHeight = theme.height() * 0.72f;
+            float margin = 20f;
+
+            // Se coordenadas customizadas foram informadas (clique ou drag & drop na página)
+            if (options.customX() != null && options.customY() != null) {
+                int targetPageIdx = totalPages - 1;
+                if (options.targetPageNumber() != null && options.targetPageNumber() >= 1 && options.targetPageNumber() <= totalPages) {
+                    targetPageIdx = options.targetPageNumber() - 1;
+                }
+
+                PDPage page = doc.getPage(targetPageIdx);
+                PDRectangle mediaBox = page.getMediaBox();
+                float pageW = mediaBox.getWidth();
+                float pageH = mediaBox.getHeight();
+
+                float x = Math.max(0, Math.min(options.customX(), pageW - sealWidth));
+                float y = Math.max(0, Math.min(options.customY(), pageH - sealHeight));
+
+                try (PDPageContentStream cs = new PDPageContentStream(doc, page, PDPageContentStream.AppendMode.APPEND, true, true)) {
+                    cs.drawImage(pdImage, x, y, sealWidth, sealHeight);
+                }
+
+                doc.save(baos);
+                return baos.toByteArray();
+            }
+
+            // Caso contrário, usa posicionamento por enum (BOTTOM_RIGHT, etc.)
+            int startPage = 0;
+            int endPage = totalPages - 1;
+
+            if (options.pageChoice() == PdfSealPageChoice.FIRST_PAGE) {
+                endPage = 0;
+            } else if (options.pageChoice() == PdfSealPageChoice.LAST_PAGE) {
+                startPage = totalPages - 1;
+            }
+
+            for (int i = startPage; i <= endPage; i++) {
+                PDPage page = doc.getPage(i);
+                PDRectangle mediaBox = page.getMediaBox();
+                float pageW = mediaBox.getWidth();
+                float pageH = mediaBox.getHeight();
+
+                float x;
+                float y;
+
+                switch (options.position()) {
+                    case BOTTOM_LEFT -> {
+                        x = margin;
+                        y = margin;
+                    }
+                    case TOP_RIGHT -> {
+                        x = pageW - sealWidth - margin;
+                        y = pageH - sealHeight - margin;
+                    }
+                    case TOP_LEFT -> {
+                        x = margin;
+                        y = pageH - sealHeight - margin;
+                    }
+                    default -> { // BOTTOM_RIGHT
+                        x = pageW - sealWidth - margin;
+                        y = margin;
+                    }
+                }
+
+                try (PDPageContentStream cs = new PDPageContentStream(doc, page, PDPageContentStream.AppendMode.APPEND, true, true)) {
+                    cs.drawImage(pdImage, x, y, sealWidth, sealHeight);
+                }
+            }
+
+            doc.save(baos);
+        }
+        return baos.toByteArray();
+    }
+
+    private static String bytesToHex(byte[] bytes) {
+        StringBuilder sb = new StringBuilder();
+        for (byte b : bytes) {
+            sb.append(String.format("%02x", b));
+        }
+        return sb.toString();
+    }
+
+    private static String extractIssuerCn(String dn) {
+        if (dn == null) return "ICP-Brasil";
+        int idx = dn.indexOf("CN=");
+        if (idx >= 0) {
+            int end = dn.indexOf(',', idx);
+            return end > idx ? dn.substring(idx + 3, end).trim() : dn.substring(idx + 3).trim();
+        }
+        return dn;
+    }
+
+    /**
+     * Assinador PAdES CMS/PKCS#7 desacoplado via Bouncy Castle.
+     */
+    private static class PadesBouncyCastleSigner implements SignatureInterface {
+        private final SigningKeyMaterial keyMaterial;
+
+        public PadesBouncyCastleSigner(SigningKeyMaterial keyMaterial) {
+            this.keyMaterial = Objects.requireNonNull(keyMaterial);
+        }
+
+        @Override
+        public byte[] sign(InputStream content) throws IOException {
+            try {
+                byte[] messageBytes = content.readAllBytes();
+
+                CMSSignedDataGenerator gen = new CMSSignedDataGenerator();
+                ContentSigner contentSigner = new JcaContentSignerBuilder("SHA256withRSA")
+                        .build(keyMaterial.privateKey());
+
+                X509Certificate userCert = keyMaterial.certificateChain()[0];
+
+                gen.addSignerInfoGenerator(new JcaSignerInfoGeneratorBuilder(
+                        new JcaDigestCalculatorProviderBuilder().build())
+                        .build(contentSigner, userCert));
+
+                gen.addCertificates(new JcaCertStore(Arrays.asList(keyMaterial.certificateChain())));
+
+                CMSTypedData msg = new CMSProcessableByteArray(messageBytes);
+                CMSSignedData signedData = gen.generate(msg, false);
+
+                return signedData.getEncoded();
+            } catch (Exception e) {
+                logger.error("Falha ao gerar assinatura CMS/PKCS#7 para PDF", e);
+                throw new IOException("Falha criptográfica no Bouncy Castle: " + e.getMessage(), e);
+            }
+        }
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/seal/CpfDisplayMode.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/seal/CpfDisplayMode.java
new file mode 100644
index 0000000..4a0ac64
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/seal/CpfDisplayMode.java
@@ -0,0 +1,64 @@
+package br.com.cybercore.signer.core.pdf.seal;
+
+/**
+ * Modo de exibição do CPF do signatário no selo visual de assinatura digital.
+ * Permite balancear autenticidade documental e privacidade de dados (LGPD).
+ */
+public enum CpfDisplayMode {
+
+    /**
+     * O CPF não é exibido no selo visual.
+     */
+    NONE("Ocultar CPF"),
+
+    /**
+     * O CPF é exibido parcialmente mascarado (ex: ***.456.789-**).
+     */
+    MASKED("Mascarado (***.456.789-**)"),
+
+    /**
+     * O CPF é exibido integralmente (ex: 123.456.789-00).
+     */
+    FULL("Completo (123.456.789-00)");
+
+    private final String description;
+
+    CpfDisplayMode(String description) {
+        this.description = description;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    /**
+     * Formata um CPF bruto ou previamente formatado de acordo com este modo.
+     *
+     * @param rawCpf CPF a ser formatado (com ou sem pontuação)
+     * @return String formatada conforme o modo escolhido, ou vazio se não houver CPF
+     */
+    public String formatCpf(String rawCpf) {
+        if (this == NONE || rawCpf == null || rawCpf.isBlank()) {
+            return "";
+        }
+
+        String digits = rawCpf.replaceAll("\\D", "");
+        if (digits.length() != 11) {
+            // Se não for um CPF de 11 dígitos, retorna mascarado ou o próprio texto
+            return this == MASKED ? "***.***.***-**" : rawCpf;
+        }
+
+        if (this == MASKED) {
+            // Mascara os 3 primeiros e os 2 dígitos verificadores: ***.456.789-**
+            String part2 = digits.substring(3, 6);
+            String part3 = digits.substring(6, 9);
+            return "***." + part2 + "." + part3 + "-**";
+        }
+
+        // FULL: 123.456.789-00
+        return digits.substring(0, 3) + "." +
+                digits.substring(3, 6) + "." +
+                digits.substring(6, 9) + "-" +
+                digits.substring(9, 11);
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/seal/CustomSealStorage.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/seal/CustomSealStorage.java
new file mode 100644
index 0000000..29cbfaa
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/seal/CustomSealStorage.java
@@ -0,0 +1,175 @@
+package br.com.cybercore.signer.core.pdf.seal;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.stream.Stream;
+
+/**
+ * Gerenciador de armazenamento em disco para Selos Visuais Personalizados criados ou instalados pelo usuário.
+ * Persiste cada selo como um arquivo JSON no diretório ~/.cybercore/seals/.
+ */
+public final class CustomSealStorage {
+
+    private static final Logger logger = LoggerFactory.getLogger(CustomSealStorage.class);
+    private static final String SEALS_DIR_NAME = "seals";
+
+    private final Path storageDir;
+    private final ObjectMapper objectMapper;
+
+    public CustomSealStorage() {
+        this(resolveDefaultStorageDir());
+    }
+
+    public CustomSealStorage(Path storageDir) {
+        this.storageDir = Objects.requireNonNull(storageDir);
+        this.objectMapper = new ObjectMapper()
+                .enable(SerializationFeature.INDENT_OUTPUT);
+        ensureDirectoryExists();
+    }
+
+    private static Path resolveDefaultStorageDir() {
+        String userHome = System.getProperty("user.home", ".");
+        return Path.of(userHome, ".cybercore", SEALS_DIR_NAME);
+    }
+
+    private void ensureDirectoryExists() {
+        try {
+            if (!Files.exists(storageDir)) {
+                Files.createDirectories(storageDir);
+            }
+        } catch (IOException e) {
+            logger.error("Falha ao criar diretório de selos personalizados: {}", storageDir, e);
+        }
+    }
+
+    public Path getStorageDir() {
+        return storageDir;
+    }
+
+    /**
+     * Salva ou atualiza um selo personalizado em disco.
+     */
+    public void saveSeal(PdfSealTheme seal) throws IOException {
+        Objects.requireNonNull(seal, "Selo não pode ser nulo.");
+        ensureDirectoryExists();
+
+        String safeFileName = sanitizeFileName(seal.id()) + ".json";
+        Path targetPath = storageDir.resolve(safeFileName);
+
+        // Marca como personalizado
+        PdfSealTheme customSeal = new PdfSealTheme(
+                seal.id(),
+                seal.name(),
+                seal.description(),
+                seal.width(),
+                seal.height(),
+                seal.primaryColor(),
+                seal.secondaryColor(),
+                seal.backgroundColor(),
+                seal.borderColor(),
+                seal.textColor(),
+                seal.svgTemplate(),
+                seal.customHeader(),
+                seal.customFooter(),
+                seal.iconStyle(),
+                seal.defaultCpfMode(),
+                seal.defaultIncludeDateTime(),
+                true,
+                seal.customLogoBase64(),
+                seal.customFieldLabel(),
+                seal.customFieldValue()
+        );
+
+        objectMapper.writeValue(targetPath.toFile(), customSeal);
+        logger.info("Selo personalizado '{}' instalado com sucesso em: {}", seal.id(), targetPath);
+    }
+
+    /**
+     * Carrega todos os selos personalizados instalados no diretório do usuário.
+     */
+    public List<PdfSealTheme> loadAllCustomSeals() {
+        List<PdfSealTheme> seals = new ArrayList<>();
+        if (!Files.exists(storageDir)) {
+            return seals;
+        }
+
+        try (Stream<Path> stream = Files.list(storageDir)) {
+            stream.filter(p -> p.toString().toLowerCase().endsWith(".json"))
+                    .forEach(file -> {
+                        try {
+                            PdfSealTheme seal = objectMapper.readValue(file.toFile(), PdfSealTheme.class);
+                            seals.add(seal);
+                        } catch (Exception e) {
+                            logger.warn("Falha ao carregar arquivo de selo {}: {}", file.getFileName(), e.getMessage());
+                        }
+                    });
+        } catch (IOException e) {
+            logger.error("Erro ao listar diretório de selos {}", storageDir, e);
+        }
+
+        return seals;
+    }
+
+    /**
+     * Remove um selo personalizado do disco.
+     */
+    public boolean deleteSeal(String sealId) {
+        if (sealId == null || sealId.isBlank()) return false;
+        String safeFileName = sanitizeFileName(sealId) + ".json";
+        Path targetPath = storageDir.resolve(safeFileName);
+
+        try {
+            boolean deleted = Files.deleteIfExists(targetPath);
+            if (deleted) {
+                logger.info("Selo personalizado '{}' removido do disco.", sealId);
+            }
+            return deleted;
+        } catch (IOException e) {
+            logger.error("Erro ao excluir selo {}: {}", sealId, e.getMessage());
+            return false;
+        }
+    }
+
+    /**
+     * Importa um selo a partir de um arquivo externo (.json) e o instala no diretório do usuário.
+     */
+    public PdfSealTheme importSeal(Path externalFile) throws IOException {
+        Objects.requireNonNull(externalFile, "Arquivo de importação não pode ser nulo.");
+        if (!Files.exists(externalFile)) {
+            throw new IllegalArgumentException("O arquivo de selo especificado não existe: " + externalFile);
+        }
+
+        PdfSealTheme seal = objectMapper.readValue(externalFile.toFile(), PdfSealTheme.class);
+        saveSeal(seal);
+        return seal;
+    }
+
+    /**
+     * Exporta um selo para um arquivo externo de destino.
+     */
+    public void exportSeal(PdfSealTheme seal, Path destinationFile) throws IOException {
+        Objects.requireNonNull(seal, "Selo não pode ser nulo.");
+        Objects.requireNonNull(destinationFile, "Destino não pode ser nulo.");
+
+        if (destinationFile.getParent() != null && !Files.exists(destinationFile.getParent())) {
+            Files.createDirectories(destinationFile.getParent());
+        }
+
+        objectMapper.writeValue(destinationFile.toFile(), seal);
+        logger.info("Selo '{}' exportado com sucesso para: {}", seal.id(), destinationFile);
+    }
+
+    private static String sanitizeFileName(String id) {
+        return id.replaceAll("[^a-zA-Z0-9._-]", "_");
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/seal/PdfSealData.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/seal/PdfSealData.java
new file mode 100644
index 0000000..cbb20ad
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/seal/PdfSealData.java
@@ -0,0 +1,64 @@
+package br.com.cybercore.signer.core.pdf.seal;
+
+import java.time.Instant;
+import java.time.ZoneId;
+import java.time.format.DateTimeFormatter;
+
+/**
+ * Metadados e dados do signatário a serem gravados e representados no selo visual da assinatura PDF.
+ */
+public record PdfSealData(
+        String signerName,
+        String identifier,
+        String signingDate,
+        String issuer,
+        String hashSummary,
+        String reason,
+        String location,
+        CpfDisplayMode cpfDisplayMode,
+        boolean includeDateTime,
+        String customExtraInfo
+) {
+
+    private static final DateTimeFormatter FORMATTER = DateTimeFormatter.ofPattern("dd/MM/yyyy HH:mm:ss (z)")
+            .withZone(ZoneId.systemDefault());
+
+    public PdfSealData {
+        signerName = (signerName != null && !signerName.isBlank()) ? signerName : "Signatário ICP-Brasil";
+        identifier = (identifier != null && !identifier.isBlank()) ? identifier : "";
+        signingDate = (signingDate != null && !signingDate.isBlank()) ? signingDate : FORMATTER.format(Instant.now());
+        issuer = (issuer != null && !issuer.isBlank()) ? issuer : "Autoridade Certificadora ICP-Brasil";
+        hashSummary = (hashSummary != null && !hashSummary.isBlank()) ? hashSummary : "";
+        reason = (reason != null && !reason.isBlank()) ? reason : "Assinatura Digital de Documento";
+        location = (location != null && !location.isBlank()) ? location : "Brasil";
+        if (cpfDisplayMode == null) {
+            cpfDisplayMode = CpfDisplayMode.FULL;
+        }
+    }
+
+    /**
+     * Construtor para compatibilidade com assinaturas anteriores a customExtraInfo.
+     */
+    public PdfSealData(String signerName, String identifier, String signingDate, String issuer,
+                       String hashSummary, String reason, String location,
+                       CpfDisplayMode cpfDisplayMode, boolean includeDateTime) {
+        this(signerName, identifier, signingDate, issuer, hashSummary, reason, location, cpfDisplayMode, includeDateTime, null);
+    }
+
+    /**
+     * Construtor de compatibilidade para código que não especifica cpfDisplayMode e includeDateTime.
+     */
+    public PdfSealData(String signerName, String identifier, String signingDate, String issuer,
+                       String hashSummary, String reason, String location) {
+        this(signerName, identifier, signingDate, issuer, hashSummary, reason, location, CpfDisplayMode.FULL, true, null);
+    }
+
+    public static PdfSealData of(String signerName, String identifier, String issuer, String hashSummary) {
+        return new PdfSealData(signerName, identifier, null, issuer, hashSummary, null, null, CpfDisplayMode.FULL, true);
+    }
+
+    public static PdfSealData of(String signerName, String identifier, String issuer, String hashSummary,
+                                CpfDisplayMode cpfDisplayMode, boolean includeDateTime) {
+        return new PdfSealData(signerName, identifier, null, issuer, hashSummary, null, null, cpfDisplayMode, includeDateTime);
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/seal/PdfSealRenderer.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/seal/PdfSealRenderer.java
new file mode 100644
index 0000000..baf143d
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/seal/PdfSealRenderer.java
@@ -0,0 +1,411 @@
+package br.com.cybercore.signer.core.pdf.seal;
+
+import javax.imageio.ImageIO;
+import java.awt.BasicStroke;
+import java.awt.Color;
+import java.awt.Font;
+import java.awt.FontMetrics;
+import java.awt.Graphics2D;
+import java.awt.RenderingHints;
+import java.awt.geom.Ellipse2D;
+import java.awt.geom.Path2D;
+import java.awt.geom.RoundRectangle2D;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.Objects;
+
+/**
+ * Renderizador de alta fidelidade para Selos Visuais de Assinatura PDF.
+ * Gera imagens nítidas (300 DPI equivalente) baseadas nos Temas e vetores SVG,
+ * utilizando exclusivamente a API gráfica padrão Java2D (AWT), sem dependência de JavaFX.
+ *
+ * Garante que o nome completo do signatário seja sempre exibido na íntegra,
+ * além de respeitar as opções de CPF (completo, mascarado ou omitido) e data/hora.
+ */
+public final class PdfSealRenderer {
+
+    private PdfSealRenderer() {
+    }
+
+    /**
+     * Renderiza o selo visual baseado no tema e dados fornecidos para um BufferedImage em escala 2x (alta nitidez).
+     */
+    public static BufferedImage renderToImage(PdfSealTheme theme, PdfSealData data) {
+        Objects.requireNonNull(theme, "Tema não pode ser nulo.");
+        Objects.requireNonNull(data, "Dados da assinatura não podem ser nulos.");
+
+        int baseWidth = theme.width();
+        int baseHeight = theme.height();
+        // Escala 2x para renderização super-nítida no documento PDF e na interface
+        int scale = 2;
+        int imgWidth = baseWidth * scale;
+        int imgHeight = baseHeight * scale;
+
+        BufferedImage image = new BufferedImage(imgWidth, imgHeight, BufferedImage.TYPE_INT_ARGB);
+        Graphics2D g2d = image.createGraphics();
+
+        try {
+            // Configuração de anti-aliasing e renderização de alta qualidade
+            g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
+            g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
+            g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
+            g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
+            g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
+
+            g2d.scale(scale, scale);
+
+            Color primaryColor = parseColor(theme.primaryColor(), new Color(13, 71, 161));
+            Color secondaryColor = parseColor(theme.secondaryColor(), new Color(2, 132, 199));
+            Color bgColor = parseColor(theme.backgroundColor(), Color.WHITE);
+            Color borderColor = parseColor(theme.borderColor(), new Color(203, 213, 225));
+            Color textColor = parseColor(theme.textColor(), new Color(15, 23, 42));
+
+            // 1. Fundo do Selo com cantos arredondados
+            g2d.setColor(bgColor);
+            g2d.fill(new RoundRectangle2D.Float(1, 1, baseWidth - 2, baseHeight - 2, 8, 8));
+
+            // 2. Borda externa
+            g2d.setColor(borderColor);
+            g2d.setStroke(new BasicStroke(1.2f));
+            g2d.draw(new RoundRectangle2D.Float(1, 1, baseWidth - 2, baseHeight - 2, 8, 8));
+
+            // 3. Tarja/Acento lateral do tema
+            g2d.setColor(primaryColor);
+            g2d.fill(new RoundRectangle2D.Float(1, 1, 5, baseHeight - 2, 3, 3));
+
+            if ("gov-br".equalsIgnoreCase(theme.id()) || "star".equalsIgnoreCase(theme.iconStyle())) {
+                g2d.setColor(secondaryColor);
+                g2d.fillRect(6, 1, 3, baseHeight - 2);
+            }
+
+            // 4. Emblema à Esquerda (Logo Customizada em Imagem ou Ícone Vetorial)
+            if (theme.customLogoBase64() != null && !theme.customLogoBase64().isBlank()) {
+                drawCustomLogo(g2d, theme.customLogoBase64(), 10, 14, 36, baseHeight - 28);
+            } else {
+                String effectiveIcon = (theme.iconStyle() != null && !theme.iconStyle().isBlank()) ? theme.iconStyle() : theme.id();
+                drawThemeIcon(g2d, effectiveIcon, primaryColor, secondaryColor);
+            }
+
+            // 5. Informações Textuais da Assinatura (Focado no Titular, sem dados técnicos/emissor)
+            int textX = 52;
+            int textWidthAvailable = baseWidth - textX - 12;
+
+            String formattedDoc = formatSignerDoc(data);
+            String customInfo = (data.customExtraInfo() != null && !data.customExtraInfo().isBlank())
+                    ? data.customExtraInfo().trim()
+                    : theme.formatCustomField();
+
+            String identityLine;
+            if (!formattedDoc.isBlank() && !customInfo.isBlank()) {
+                identityLine = formattedDoc + " • " + customInfo;
+            } else if (!formattedDoc.isBlank()) {
+                identityLine = formattedDoc;
+            } else {
+                identityLine = customInfo;
+            }
+
+            boolean hasIdentity = !identityLine.isBlank();
+            boolean hasDate = data.includeDateTime();
+
+            String fullName = data.signerName() != null ? data.signerName().trim() : "Signatário ICP-Brasil";
+            String headerText = resolveHeaderText(theme);
+            String footerText = resolveFooterText(theme, null);
+
+            if (hasIdentity && hasDate) {
+                // Layout com 5 linhas: Cabeçalho, Nome, Identificação (CPF/Matrícula), Data, Rodapé
+                g2d.setColor(primaryColor);
+                g2d.setFont(new Font(Font.SANS_SERIF, Font.BOLD, 9));
+                g2d.drawString(headerText, textX, 16);
+
+                g2d.setColor(textColor);
+                drawFullSignerName(g2d, fullName, textX, 33, textWidthAvailable, 13.0f);
+
+                g2d.setColor(new Color(51, 65, 85));
+                g2d.setFont(new Font(Font.SANS_SERIF, Font.PLAIN, 10));
+                drawFittedText(g2d, identityLine, textX, 47, textWidthAvailable, 10.0f);
+
+                g2d.drawString("Data: " + data.signingDate(), textX, 60);
+
+                g2d.setColor(secondaryColor);
+                g2d.setFont(new Font(Font.SANS_SERIF, Font.ITALIC, 8));
+                g2d.drawString(footerText, textX, 73);
+
+            } else if (hasIdentity || hasDate) {
+                // Layout com 4 linhas: Cabeçalho, Nome, (Identificação ou Data), Rodapé
+                g2d.setColor(primaryColor);
+                g2d.setFont(new Font(Font.SANS_SERIF, Font.BOLD, 10));
+                g2d.drawString(headerText, textX, 17);
+
+                g2d.setColor(textColor);
+                drawFullSignerName(g2d, fullName, textX, 36, textWidthAvailable, 13.5f);
+
+                g2d.setColor(new Color(51, 65, 85));
+                g2d.setFont(new Font(Font.SANS_SERIF, Font.PLAIN, 10));
+                String singleLineInfo = hasIdentity ? identityLine : ("Data: " + data.signingDate());
+                drawFittedText(g2d, singleLineInfo, textX, 53, textWidthAvailable, 10.0f);
+
+                g2d.setColor(secondaryColor);
+                g2d.setFont(new Font(Font.SANS_SERIF, Font.ITALIC, 8));
+                g2d.drawString(footerText, textX, 71);
+
+            } else {
+                // Layout com 3 linhas: Cabeçalho, Nome em Destaque Máximo, Rodapé
+                g2d.setColor(primaryColor);
+                g2d.setFont(new Font(Font.SANS_SERIF, Font.BOLD, 10));
+                g2d.drawString(headerText, textX, 19);
+
+                g2d.setColor(textColor);
+                drawFullSignerName(g2d, fullName, textX, 44, textWidthAvailable, 14.5f);
+
+                g2d.setColor(secondaryColor);
+                g2d.setFont(new Font(Font.SANS_SERIF, Font.ITALIC, 9));
+                g2d.drawString(footerText, textX, 68);
+            }
+
+        } finally {
+            g2d.dispose();
+        }
+
+        return image;
+    }
+
+    /**
+     * Desenha o logotipo personalizado fornecido em Base64, preservando o aspecto proporcional
+     * e aplicando anti-aliasing e interpolação bilinear de alta fidelidade.
+     */
+    private static void drawCustomLogo(Graphics2D g2d, String base64Data, int x, int y, int maxWidth, int maxHeight) {
+        try {
+            String cleanBase64 = base64Data;
+            int commaIdx = cleanBase64.indexOf(",");
+            if (commaIdx >= 0 && cleanBase64.substring(0, commaIdx).contains("base64")) {
+                cleanBase64 = cleanBase64.substring(commaIdx + 1);
+            }
+            byte[] bytes = java.util.Base64.getDecoder().decode(cleanBase64.trim());
+            BufferedImage logoImg = ImageIO.read(new java.io.ByteArrayInputStream(bytes));
+            if (logoImg != null) {
+                int originalW = logoImg.getWidth();
+                int originalH = logoImg.getHeight();
+                if (originalW > 0 && originalH > 0) {
+                    double scaleW = (double) maxWidth / originalW;
+                    double scaleH = (double) maxHeight / originalH;
+                    double scale = Math.min(scaleW, scaleH);
+                    int targetW = Math.max(1, (int) Math.round(originalW * scale));
+                    int targetH = Math.max(1, (int) Math.round(originalH * scale));
+
+                    int posX = x + (maxWidth - targetW) / 2;
+                    int posY = y + (maxHeight - targetH) / 2;
+
+                    g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
+                    g2d.drawImage(logoImg, posX, posY, targetW, targetH, null);
+                    return;
+                }
+            }
+        } catch (Exception ignored) {
+            // Se houver falha na leitura do logo, recorre ao escudo padrão
+        }
+        drawThemeIcon(g2d, "shield", new Color(13, 71, 161), new Color(2, 132, 199));
+    }
+
+    /**
+     * Desenha o nome completo do signatário sem cortes ou truncamentos.
+     * Ajusta a fonte gradativamente para caber perfeitamente na largura do selo.
+     */
+    private static void drawFullSignerName(Graphics2D g2d, String fullName, int x, int y, int maxWidth, float preferredSize) {
+        float fontSize = preferredSize;
+        Font font = new Font(Font.SANS_SERIF, Font.BOLD, Math.round(fontSize));
+        FontMetrics fm = g2d.getFontMetrics(font);
+
+        // Se o nome for longo, reduz o tamanho da fonte até caber perfeitamente
+        while (fm.stringWidth(fullName) > maxWidth && fontSize > 8.0f) {
+            fontSize -= 0.5f;
+            font = new Font(Font.SANS_SERIF, Font.BOLD, Math.round(fontSize));
+            fm = g2d.getFontMetrics(font);
+        }
+
+        g2d.setFont(font);
+        g2d.drawString(fullName, x, y);
+    }
+
+    /**
+     * Desenha texto informativo secundário ajustando suavemente a fonte caso exceda a largura.
+     */
+    private static void drawFittedText(Graphics2D g2d, String text, int x, int y, int maxWidth, float baseSize) {
+        if (text == null || text.isBlank()) return;
+        float fontSize = baseSize;
+        Font font = new Font(Font.SANS_SERIF, Font.PLAIN, Math.round(fontSize));
+        FontMetrics fm = g2d.getFontMetrics(font);
+
+        while (fm.stringWidth(text) > maxWidth && fontSize > 7.5f) {
+            fontSize -= 0.5f;
+            font = new Font(Font.SANS_SERIF, Font.PLAIN, Math.round(fontSize));
+            fm = g2d.getFontMetrics(font);
+        }
+
+        g2d.setFont(font);
+        g2d.drawString(text, x, y);
+    }
+
+    /**
+     * Formata os dados de documento (CPF/CNPJ) de acordo com o modo de exibição configurado.
+     */
+    private static String formatSignerDoc(PdfSealData data) {
+        CpfDisplayMode mode = data.cpfDisplayMode() != null ? data.cpfDisplayMode() : CpfDisplayMode.FULL;
+        String rawDoc = data.identifier() != null ? data.identifier() : "";
+
+        if (mode == CpfDisplayMode.NONE) {
+            // Se for CPF, oculta. Se for CNPJ, pode manter ou formatar.
+            if (rawDoc.toUpperCase().contains("CPF")) {
+                return "";
+            }
+            return rawDoc;
+        }
+
+        if (rawDoc.toUpperCase().contains("CPF")) {
+            String digits = rawDoc.replaceAll("\\D", "");
+            String formatted = mode.formatCpf(digits);
+            return formatted.isBlank() ? "" : "CPF: " + formatted;
+        }
+
+        return rawDoc;
+    }
+
+    /**
+     * Renderiza o selo visual e o exporta diretamente como array de bytes PNG.
+     */
+    public static byte[] renderToPngBytes(PdfSealTheme theme, PdfSealData data) throws IOException {
+        BufferedImage img = renderToImage(theme, data);
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        ImageIO.write(img, "PNG", baos);
+        return baos.toByteArray();
+    }
+
+    private static void drawThemeIcon(Graphics2D g2d, String iconStyleOrId, Color primary, Color secondary) {
+        g2d.translate(14, 18);
+
+        String style = (iconStyleOrId != null) ? iconStyleOrId.toLowerCase() : "shield";
+
+        if ("cybercore-modern".equals(style) || "crystal".equals(style)) {
+            // Cristal CyberCore Vetorial
+            Path2D.Float crystal = new Path2D.Float();
+            crystal.moveTo(16, 2);
+            crystal.lineTo(28, 9);
+            crystal.lineTo(28, 25);
+            crystal.lineTo(16, 32);
+            crystal.lineTo(4, 25);
+            crystal.lineTo(4, 9);
+            crystal.closePath();
+
+            g2d.setColor(new Color(primary.getRed(), primary.getGreen(), primary.getBlue(), 35));
+            g2d.fill(crystal);
+            g2d.setColor(primary);
+            g2d.setStroke(new BasicStroke(1.5f));
+            g2d.draw(crystal);
+
+            g2d.setColor(secondary);
+            g2d.drawLine(16, 2, 16, 32);
+            g2d.setColor(primary);
+            g2d.drawLine(4, 17, 28, 17);
+
+        } else if ("minimal-clean".equals(style) || "notary".equals(style) || "cartorio".equals(style)) {
+            // Carimbo notarial sóbrio
+            g2d.setColor(primary);
+            g2d.setStroke(new BasicStroke(1.5f));
+            g2d.draw(new Ellipse2D.Float(2, 2, 28, 28));
+            g2d.setStroke(new BasicStroke(0.8f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 10.0f, new float[]{2.0f, 2.0f}, 0.0f));
+            g2d.draw(new Ellipse2D.Float(5, 5, 22, 22));
+
+            // Checkmark
+            g2d.setStroke(new BasicStroke(1.8f));
+            g2d.drawLine(10, 16, 14, 20);
+            g2d.drawLine(14, 20, 22, 12);
+
+        } else if ("gov-br".equals(style) || "star".equals(style) || "governo".equals(style)) {
+            // Brasão estelar estilizado
+            g2d.setColor(new Color(primary.getRed(), primary.getGreen(), primary.getBlue(), 30));
+            g2d.fill(new Ellipse2D.Float(2, 2, 28, 28));
+            g2d.setColor(primary);
+            g2d.setStroke(new BasicStroke(1.4f));
+            g2d.draw(new Ellipse2D.Float(2, 2, 28, 28));
+
+            // Estrela interna
+            Path2D.Float star = new Path2D.Float();
+            star.moveTo(16, 6);
+            star.lineTo(19, 13);
+            star.lineTo(26, 13);
+            star.lineTo(20, 17);
+            star.lineTo(22, 24);
+            star.lineTo(16, 20);
+            star.lineTo(10, 24);
+            star.lineTo(12, 17);
+            star.lineTo(6, 13);
+            star.lineTo(13, 13);
+            star.closePath();
+            g2d.setColor(secondary);
+            g2d.fill(star);
+
+        } else {
+            // Padrão: Escudo Criptográfico Oficial com Cadeado
+            Path2D.Float shield = new Path2D.Float();
+            shield.moveTo(16, 2);
+            shield.lineTo(28, 6);
+            shield.lineTo(28, 16);
+            shield.curveTo(28, 25, 22, 31, 16, 34);
+            shield.curveTo(10, 31, 4, 25, 4, 16);
+            shield.lineTo(4, 6);
+            shield.closePath();
+
+            g2d.setColor(new Color(primary.getRed(), primary.getGreen(), primary.getBlue(), 35));
+            g2d.fill(shield);
+            g2d.setColor(primary);
+            g2d.setStroke(new BasicStroke(1.5f));
+            g2d.draw(shield);
+
+            // Cadeado
+            g2d.setColor(primary);
+            g2d.fillRect(11, 15, 10, 8);
+            g2d.setStroke(new BasicStroke(1.3f));
+            g2d.drawArc(12, 9, 8, 8, 0, 180);
+            g2d.setColor(Color.WHITE);
+            g2d.fillOval(15, 17, 2, 2);
+        }
+
+        g2d.translate(-14, -18);
+    }
+
+    private static String resolveHeaderText(PdfSealTheme theme) {
+        if (theme.customHeader() != null && !theme.customHeader().isBlank()) {
+            return theme.customHeader().toUpperCase();
+        }
+        return switch (theme.id().toLowerCase()) {
+            case "cybercore-modern" -> "CYBERCORE SIGNER • AUTENTICAÇÃO DIGITAL";
+            case "minimal-clean" -> "DOCUMENTO ASSINADO DIGITALMENTE";
+            case "gov-br" -> "GOV.BR • CONFORMIDADE MP Nº 2.200-2/2001";
+            default -> "ASSINADO DIGITALMENTE • ICP-BRASIL";
+        };
+    }
+
+    private static String resolveFooterText(PdfSealTheme theme, String hash) {
+        if (theme.customFooter() != null && !theme.customFooter().isBlank()) {
+            return theme.customFooter();
+        }
+        if (hash != null && !hash.isBlank()) {
+            return "Hash Criptográfico: " + hash;
+        }
+        return switch (theme.id().toLowerCase()) {
+            case "cybercore-modern" -> "Autenticidade assegurada por chave criptográfica local";
+            case "minimal-clean" -> "Assinatura qualificada padrão ICP-Brasil";
+            case "gov-br" -> "Validade jurídica plena conforme MP nº 2.200-2/2001";
+            default -> "Conformidade ICP-Brasil e validade jurídica plena";
+        };
+    }
+
+    private static Color parseColor(String hex, Color def) {
+        if (hex == null || !hex.startsWith("#")) return def;
+        try {
+            return Color.decode(hex);
+        } catch (Exception e) {
+            return def;
+        }
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/seal/PdfSealTheme.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/seal/PdfSealTheme.java
new file mode 100644
index 0000000..9911a25
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/seal/PdfSealTheme.java
@@ -0,0 +1,135 @@
+package br.com.cybercore.signer.core.pdf.seal;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+
+import java.util.Objects;
+
+/**
+ * Modelo de configuração e identidade visual de um Tema de Selo de Assinatura PDF.
+ * Permite definir paleta de cores, dimensões, templates, textos personalizados e preferências de exibição.
+ */
+@JsonIgnoreProperties(ignoreUnknown = true)
+public record PdfSealTheme(
+        String id,
+        String name,
+        String description,
+        int width,
+        int height,
+        String primaryColor,
+        String secondaryColor,
+        String backgroundColor,
+        String borderColor,
+        String textColor,
+        String svgTemplate,
+        String customHeader,
+        String customFooter,
+        String iconStyle,
+        CpfDisplayMode defaultCpfMode,
+        boolean defaultIncludeDateTime,
+        boolean isCustom,
+        String customLogoBase64,
+        String customFieldLabel,
+        String customFieldValue
+) {
+
+    public PdfSealTheme {
+        Objects.requireNonNull(id, "ID do tema não pode ser nulo.");
+        Objects.requireNonNull(name, "Nome do tema não pode ser nulo.");
+        if (width <= 0) width = 320;
+        if (height <= 0) height = 82;
+        if (primaryColor == null) primaryColor = "#0d47a1";
+        if (secondaryColor == null) secondaryColor = "#0284c7";
+        if (backgroundColor == null) backgroundColor = "#ffffff";
+        if (borderColor == null) borderColor = "#cbd5e1";
+        if (textColor == null) textColor = "#0f172a";
+        if (iconStyle == null || iconStyle.isBlank()) iconStyle = "shield";
+        if (defaultCpfMode == null) defaultCpfMode = CpfDisplayMode.FULL;
+    }
+
+    /**
+     * Construtor para temas customizados com logotipo Base64, sem campos extras.
+     */
+    public PdfSealTheme(String id, String name, String description, int width, int height,
+                        String primaryColor, String secondaryColor, String backgroundColor,
+                        String borderColor, String textColor, String svgTemplate,
+                        String customHeader, String customFooter, String iconStyle,
+                        CpfDisplayMode defaultCpfMode, boolean defaultIncludeDateTime, boolean isCustom,
+                        String customLogoBase64) {
+        this(id, name, description, width, height, primaryColor, secondaryColor, backgroundColor,
+                borderColor, textColor, svgTemplate, customHeader, customFooter, iconStyle,
+                defaultCpfMode, defaultIncludeDateTime, isCustom, customLogoBase64, null, null);
+    }
+
+    /**
+     * Construtor para temas customizados sem logo personalizada em imagem.
+     */
+    public PdfSealTheme(String id, String name, String description, int width, int height,
+                        String primaryColor, String secondaryColor, String backgroundColor,
+                        String borderColor, String textColor, String svgTemplate,
+                        String customHeader, String customFooter, String iconStyle,
+                        CpfDisplayMode defaultCpfMode, boolean defaultIncludeDateTime, boolean isCustom) {
+        this(id, name, description, width, height, primaryColor, secondaryColor, backgroundColor,
+                borderColor, textColor, svgTemplate, customHeader, customFooter, iconStyle,
+                defaultCpfMode, defaultIncludeDateTime, isCustom, null, null, null);
+    }
+
+    /**
+     * Construtor legado para os temas embutidos do sistema.
+     */
+    public PdfSealTheme(String id, String name, String description, int width, int height,
+                        String primaryColor, String secondaryColor, String backgroundColor,
+                        String borderColor, String textColor, String svgTemplate) {
+        this(id, name, description, width, height, primaryColor, secondaryColor, backgroundColor,
+                borderColor, textColor, svgTemplate, null, null, "shield", CpfDisplayMode.FULL, true, false, null, null, null);
+    }
+
+    /**
+     * Formata o campo customizado (ex: "Matrícula: 104829" ou "Cargo: Auditor Fiscal").
+     */
+    public String formatCustomField() {
+        boolean hasLabel = customFieldLabel != null && !customFieldLabel.isBlank();
+        boolean hasValue = customFieldValue != null && !customFieldValue.isBlank();
+        if (hasLabel && hasValue) {
+            String label = customFieldLabel.trim();
+            if (!label.endsWith(":")) label += ":";
+            return label + " " + customFieldValue.trim();
+        } else if (hasValue) {
+            return customFieldValue.trim();
+        } else if (hasLabel) {
+            return customFieldLabel.trim();
+        }
+        return "";
+    }
+
+    /**
+     * Gera o código SVG final substituindo os marcadores pelos dados reais da assinatura.
+     */
+    public String renderSvg(PdfSealData data) {
+        if (svgTemplate == null || svgTemplate.isBlank()) {
+            return "";
+        }
+        return svgTemplate
+                .replace("${THEME_PRIMARY}", primaryColor)
+                .replace("${THEME_SECONDARY}", secondaryColor)
+                .replace("${THEME_BG}", backgroundColor)
+                .replace("${THEME_BORDER}", borderColor)
+                .replace("${THEME_TEXT}", textColor)
+                .replace("${SIGNER_NAME}", escapeXml(data.signerName()))
+                .replace("${SIGNER_DOC}", escapeXml(data.identifier()))
+                .replace("${SIGNING_DATE}", escapeXml(data.signingDate()))
+                .replace("${CERT_ISSUER}", escapeXml(data.issuer()))
+                .replace("${HASH_SUMMARY}", escapeXml(data.hashSummary()))
+                .replace("${REASON}", escapeXml(data.reason()))
+                .replace("${LOCATION}", escapeXml(data.location()));
+    }
+
+    private static String escapeXml(String text) {
+        if (text == null) return "";
+        return text
+                .replace("&", "&amp;")
+                .replace("<", "&lt;")
+                .replace(">", "&gt;")
+                .replace("\"", "&quot;")
+                .replace("'", "&apos;");
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/seal/PdfSealThemeRegistry.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/seal/PdfSealThemeRegistry.java
new file mode 100644
index 0000000..1e67b81
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/pdf/seal/PdfSealThemeRegistry.java
@@ -0,0 +1,240 @@
+package br.com.cybercore.signer.core.pdf.seal;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * Registro central de temas de selos visuais para assinatura PDF.
+ * Inclui os temas padrão do sistema e permite instalar, gerenciar e persistir dinamicamente
+ * temas personalizados de selo criados ou importados pelo usuário.
+ */
+public final class PdfSealThemeRegistry {
+
+    private static final Logger logger = LoggerFactory.getLogger(PdfSealThemeRegistry.class);
+
+    private static final Map<String, PdfSealTheme> THEMES = new ConcurrentHashMap<>();
+    private static final CustomSealStorage STORAGE = new CustomSealStorage();
+
+    public static final String DEFAULT_THEME_ID = "icp-brasil";
+
+    static {
+        registerBuiltInThemes();
+        loadCustomThemes();
+    }
+
+    private PdfSealThemeRegistry() {
+    }
+
+    private static void registerBuiltInThemes() {
+        // 1. Tema ICP-Brasil Institucional
+        registerTheme(new PdfSealTheme(
+                "icp-brasil",
+                "ICP-Brasil Institucional",
+                "Estilo oficial corporativo com escudo de segurança vetorial e dados completos do titular",
+                320,
+                82,
+                "#0d47a1",
+                "#0284c7",
+                "#ffffff",
+                "#93c5fd",
+                "#0f172a",
+                """
+                <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 320 82" width="320" height="82">
+                  <rect x="1" y="1" width="318" height="80" rx="6" fill="${THEME_BG}" stroke="${THEME_BORDER}" stroke-width="1.5"/>
+                  <rect x="1" y="1" width="6" height="80" rx="3" fill="${THEME_PRIMARY}"/>
+                  <!-- Escudo Criptográfico Vetorial -->
+                  <g transform="translate(14, 18)">
+                    <path d="M18 2 L32 7 V18 C32 28 25 36 18 39 C11 36 4 28 4 18 V7 Z" fill="${THEME_PRIMARY}" opacity="0.12"/>
+                    <path d="M18 2 L32 7 V18 C32 28 25 36 18 39 C11 36 4 28 4 18 V7 Z" fill="none" stroke="${THEME_PRIMARY}" stroke-width="2"/>
+                    <!-- Cadeado -->
+                    <rect x="12" y="17" width="12" height="10" rx="2" fill="${THEME_PRIMARY}"/>
+                    <path d="M14 17 V13 C14 10.8 15.8 9 18 9 C20.2 9 22 10.8 22 13 V17" fill="none" stroke="${THEME_PRIMARY}" stroke-width="1.8"/>
+                    <circle cx="18" cy="22" r="1.5" fill="#ffffff"/>
+                  </g>
+                  <!-- Dados da Assinatura -->
+                  <text x="56" y="17" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif" font-size="8.5" font-weight="bold" fill="${THEME_PRIMARY}" letter-spacing="0.5">ASSINADO DIGITALMENTE • ICP-BRASIL</text>
+                  <text x="56" y="32" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif" font-size="12" font-weight="bold" fill="${THEME_TEXT}">${SIGNER_NAME}</text>
+                  <text x="56" y="46" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif" font-size="8.5" fill="#475569">Doc: ${SIGNER_DOC} • AC: ${CERT_ISSUER}</text>
+                  <text x="56" y="59" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif" font-size="8.5" fill="#475569">Data/Hora: ${SIGNING_DATE}</text>
+                  <text x="56" y="72" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif" font-size="7.5" fill="${THEME_SECONDARY}">Verificação criptográfica válida e com fé pública</text>
+                </svg>
+                """
+        ));
+
+        // 2. Tema CyberCore Moderno
+        registerTheme(new PdfSealTheme(
+                "cybercore-modern",
+                "CyberCore Moderno",
+                "Identidade tecnológica com cristal vetorial CyberCore e visual ciano/esmeralda",
+                320,
+                82,
+                "#0284c7",
+                "#10b981",
+                "#ffffff",
+                "#38bdf8",
+                "#0f172a",
+                """
+                <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 320 82" width="320" height="82">
+                  <rect x="1" y="1" width="318" height="80" rx="8" fill="${THEME_BG}" stroke="${THEME_BORDER}" stroke-width="1.5"/>
+                  <rect x="1" y="1" width="5" height="80" rx="2.5" fill="${THEME_SECONDARY}"/>
+                  <!-- Cristal CyberCore Vetorial -->
+                  <g transform="translate(14, 20)">
+                    <polygon points="18,2 32,10 32,28 18,36 4,28 4,10" fill="${THEME_PRIMARY}" opacity="0.15"/>
+                    <polygon points="18,2 32,10 32,28 18,36 4,28 4,10" fill="none" stroke="${THEME_PRIMARY}" stroke-width="1.8"/>
+                    <line x1="18" y1="2" x2="18" y2="36" stroke="${THEME_SECONDARY}" stroke-width="1.2"/>
+                    <line x1="4" y1="19" x2="32" y2="19" stroke="${THEME_PRIMARY}" stroke-width="1.2"/>
+                  </g>
+                  <!-- Dados da Assinatura -->
+                  <text x="56" y="17" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif" font-size="8.5" font-weight="bold" fill="${THEME_PRIMARY}">CYBERCORE SIGNER • ASSINATURA ELETRÔNICA</text>
+                  <text x="56" y="32" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif" font-size="12" font-weight="bold" fill="${THEME_TEXT}">${SIGNER_NAME}</text>
+                  <text x="56" y="46" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif" font-size="8.5" fill="#475569">${SIGNER_DOC} • ${CERT_ISSUER}</text>
+                  <text x="56" y="59" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif" font-size="8.5" fill="#475569">Autenticado em: ${SIGNING_DATE}</text>
+                  <text x="56" y="72" font-family="monospace" font-size="7.5" fill="${THEME_SECONDARY}">Hash: ${HASH_SUMMARY}</text>
+                </svg>
+                """
+        ));
+
+        // 3. Tema Minimalista Clássico
+        registerTheme(new PdfSealTheme(
+                "minimal-clean",
+                "Minimalista Clássico",
+                "Design monocromático sóbrio em tons de grafite, ideal para contratos e certidões",
+                300,
+                76,
+                "#334155",
+                "#64748b",
+                "#fafafa",
+                "#cbd5e1",
+                "#1e293b",
+                """
+                <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 300 76" width="300" height="76">
+                  <rect x="1" y="1" width="298" height="74" rx="4" fill="${THEME_BG}" stroke="${THEME_BORDER}" stroke-width="1"/>
+                  <!-- Ícone de Carimbo Notarial -->
+                  <g transform="translate(12, 18)">
+                    <circle cx="18" cy="18" r="16" fill="none" stroke="${THEME_PRIMARY}" stroke-width="1.5"/>
+                    <circle cx="18" cy="18" r="13" fill="none" stroke="${THEME_PRIMARY}" stroke-width="0.8" stroke-dasharray="2,2"/>
+                    <path d="M12 18 L16 22 L24 14" fill="none" stroke="${THEME_PRIMARY}" stroke-width="2"/>
+                  </g>
+                  <!-- Dados da Assinatura -->
+                  <text x="52" y="17" font-family="Georgia, serif" font-size="9" font-weight="bold" fill="${THEME_PRIMARY}">Assinado Digitalmente</text>
+                  <text x="52" y="32" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif" font-size="11.5" font-weight="bold" fill="${THEME_TEXT}">${SIGNER_NAME}</text>
+                  <text x="52" y="46" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif" font-size="8" fill="#475569">${SIGNER_DOC} • ${CERT_ISSUER}</text>
+                  <text x="52" y="58" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif" font-size="8" fill="#475569">${SIGNING_DATE}</text>
+                  <text x="52" y="69" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif" font-size="7.5" fill="#64748b">Conforme MP 2.200-2/2001 e ICP-Brasil</text>
+                </svg>
+                """
+        ));
+
+        // 4. Tema Governamental (Gov.br / ITI)
+        registerTheme(new PdfSealTheme(
+                "gov-br",
+                "Governamental (Padrão Gov.br / ITI)",
+                "Faixa verde e ouro com declaração expressa de validade pela MP nº 2.200-2/2001",
+                320,
+                82,
+                "#047857",
+                "#eab308",
+                "#ffffff",
+                "#a7f3d0",
+                "#064e3b",
+                """
+                <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 320 82" width="320" height="82">
+                  <rect x="1" y="1" width="318" height="80" rx="4" fill="${THEME_BG}" stroke="${THEME_BORDER}" stroke-width="1.5"/>
+                  <rect x="1" y="1" width="6" height="80" rx="2" fill="${THEME_PRIMARY}"/>
+                  <rect x="7" y="1" width="3" height="80" fill="${THEME_SECONDARY}"/>
+                  <!-- Brasão Estilizado -->
+                  <g transform="translate(16, 20)">
+                    <circle cx="17" cy="18" r="15" fill="${THEME_PRIMARY}" opacity="0.1"/>
+                    <circle cx="17" cy="18" r="15" fill="none" stroke="${THEME_PRIMARY}" stroke-width="1.5"/>
+                    <path d="M17 6 L20 14 L28 14 L22 19 L24 27 L17 22 L10 27 L12 19 L6 14 L14 14 Z" fill="${THEME_SECONDARY}"/>
+                  </g>
+                  <!-- Dados da Assinatura -->
+                  <text x="56" y="17" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif" font-size="8.5" font-weight="bold" fill="${THEME_PRIMARY}">GOV.BR • DOCUMENTO ASSINADO DIGITALMENTE</text>
+                  <text x="56" y="32" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif" font-size="12" font-weight="bold" fill="${THEME_TEXT}">${SIGNER_NAME}</text>
+                  <text x="56" y="46" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif" font-size="8.5" fill="#065f46">Doc: ${SIGNER_DOC} • AC: ${CERT_ISSUER}</text>
+                  <text x="56" y="59" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif" font-size="8.5" fill="#475569">Data/Hora: ${SIGNING_DATE}</text>
+                  <text x="56" y="72" font-family="-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif" font-size="7.5" fill="#047857">Validade jurídica assegurada pela MP nº 2.200-2/2001</text>
+                </svg>
+                """
+        ));
+    }
+
+    /**
+     * Carrega os temas personalizados armazenados no disco.
+     */
+    public static void loadCustomThemes() {
+        try {
+            List<PdfSealTheme> customs = STORAGE.loadAllCustomSeals();
+            for (PdfSealTheme theme : customs) {
+                THEMES.put(theme.id().toLowerCase(), theme);
+            }
+            logger.info("Carregados {} temas de selos personalizados do disco.", customs.size());
+        } catch (Exception e) {
+            logger.warn("Não foi possível carregar temas personalizados: {}", e.getMessage());
+        }
+    }
+
+    public static void registerTheme(PdfSealTheme theme) {
+        Objects.requireNonNull(theme, "Tema não pode ser nulo.");
+        THEMES.put(theme.id().toLowerCase(), theme);
+    }
+
+    /**
+     * Instala um tema personalizado, salvando-o no disco e registrando-o para uso imediato.
+     */
+    public static void installCustomTheme(PdfSealTheme theme) throws IOException {
+        Objects.requireNonNull(theme, "Tema não pode ser nulo.");
+        STORAGE.saveSeal(theme);
+        registerTheme(theme);
+    }
+
+    /**
+     * Remove um tema personalizado do disco e do registro.
+     * Não permite remover temas padrão do sistema.
+     */
+    public static boolean uninstallCustomTheme(String themeId) {
+        if (themeId == null) return false;
+        String idLower = themeId.toLowerCase();
+
+        // Protege temas padrão
+        if (idLower.equals("icp-brasil") || idLower.equals("cybercore-modern") ||
+                idLower.equals("minimal-clean") || idLower.equals("gov-br")) {
+            throw new IllegalArgumentException("Não é permitido excluir os temas de selo pré-instalados do sistema.");
+        }
+
+        boolean deleted = STORAGE.deleteSeal(idLower);
+        THEMES.remove(idLower);
+        return deleted;
+    }
+
+    public static Optional<PdfSealTheme> findById(String id) {
+        if (id == null) return Optional.empty();
+        return Optional.ofNullable(THEMES.get(id.toLowerCase()));
+    }
+
+    public static Optional<PdfSealTheme> getTheme(String id) {
+        return findById(id);
+    }
+
+    public static PdfSealTheme getDefaultTheme() {
+        return THEMES.getOrDefault(DEFAULT_THEME_ID, THEMES.values().iterator().next());
+    }
+
+    public static List<PdfSealTheme> listThemes() {
+        List<PdfSealTheme> list = new ArrayList<>(THEMES.values());
+        return Collections.unmodifiableList(list);
+    }
+
+    public static CustomSealStorage getStorage() {
+        return STORAGE;
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/protocol/CcspErrorCode.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/protocol/CcspErrorCode.java
new file mode 100644
index 0000000..2313a58
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/protocol/CcspErrorCode.java
@@ -0,0 +1,35 @@
+package br.com.cybercore.signer.core.protocol;
+
+/**
+ * Códigos de erro padronizados do protocolo CyberCore Signing Protocol (CCSP/1).
+ */
+public enum CcspErrorCode {
+    CERTIFICATE_NOT_FOUND("Certificado especificado não foi encontrado."),
+    CERTIFICATE_EXPIRED("O certificado selecionado está expirado."),
+    CERTIFICATE_INVALID("O certificado é inválido ou está corrompido."),
+    PRIVATE_KEY_NOT_AVAILABLE("Chave privada inacessível ou não disponível para a operação."),
+    TOKEN_NOT_FOUND("Nenhum token ou leitor de smart card compatível foi encontrado."),
+    TOKEN_REMOVED("O token ou smart card foi desconectado durante a operação."),
+    PIN_REQUIRED("PIN obrigatório para desbloqueio do dispositivo."),
+    PIN_INCORRECT("PIN informado é incorreto."),
+    PKCS11_ERROR("Falha na comunicação com o módulo PKCS#11 do dispositivo."),
+    SIGNATURE_FAILED("Falha ao gerar a assinatura digital."),
+    APPLICATION_NOT_AUTHORIZED("Aplicação web não possui autorização para solicitar assinaturas."),
+    REQUEST_EXPIRED("A requisição de assinatura expirou."),
+    REPLAY_DETECTED("Requisição duplicada detectada (replay attack prevenido)."),
+    INVALID_ORIGIN("Origem da requisição não é permitida para esta aplicação."),
+    UNSUPPORTED_ALGORITHM("Algoritmo de assinatura não suportado."),
+    USER_CANCELLED("Operação cancelada pelo usuário."),
+    PROVIDER_NOT_AVAILABLE("O provedor criptográfico necessário não está disponível."),
+    COMMUNICATION_ERROR("Erro interno de comunicação no agente local.");
+
+    private final String defaultMessage;
+
+    CcspErrorCode(String defaultMessage) {
+        this.defaultMessage = defaultMessage;
+    }
+
+    public String getDefaultMessage() {
+        return defaultMessage;
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/protocol/CcspOperation.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/protocol/CcspOperation.java
new file mode 100644
index 0000000..29da06f
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/protocol/CcspOperation.java
@@ -0,0 +1,39 @@
+package br.com.cybercore.signer.core.protocol;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
+/**
+ * Operações suportadas pelo protocolo CCSP.
+ */
+public enum CcspOperation {
+    SIGN("sign"),
+    AUTHENTICATE("authenticate"),
+    LIST_CERTIFICATES("list_certificates"),
+    STATUS("status"),
+    PING("ping");
+
+    private final String value;
+
+    CcspOperation(String value) {
+        this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+        return value;
+    }
+
+    @JsonCreator
+    public static CcspOperation fromValue(String value) {
+        if (value == null) {
+            return null;
+        }
+        for (CcspOperation op : values()) {
+            if (op.value.equalsIgnoreCase(value.trim())) {
+                return op;
+            }
+        }
+        throw new IllegalArgumentException("Operação CCSP desconhecida: " + value);
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/protocol/CcspRequest.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/protocol/CcspRequest.java
new file mode 100644
index 0000000..f744e37
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/protocol/CcspRequest.java
@@ -0,0 +1,96 @@
+package br.com.cybercore.signer.core.protocol;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import java.io.Serializable;
+import java.time.Instant;
+
+/**
+ * Mensagem de requisição do CyberCore Signing Protocol (CCSP/1).
+ */
+@JsonInclude(JsonInclude.Include.NON_NULL)
+@JsonIgnoreProperties(ignoreUnknown = true)
+public record CcspRequest(
+        @JsonProperty("version")
+        String version,
+
+        @JsonProperty("request_id")
+        String requestId,
+
+        @JsonProperty("application_id")
+        String applicationId,
+
+        @JsonProperty("operation")
+        String operation,
+
+        @JsonProperty("algorithm")
+        String algorithm,
+
+        @JsonProperty("digest")
+        String digest,
+
+        @JsonProperty("certificate_hint")
+        String certificateHint,
+
+        @JsonProperty("expires_at")
+        String expiresAt,
+
+        @JsonProperty("timestamp")
+        Long timestamp,
+
+        @JsonProperty("nonce")
+        String nonce,
+
+        @JsonProperty("signature_type")
+        String signatureType,
+
+        @JsonProperty("document_name")
+        String documentName,
+
+        @JsonProperty("document_type")
+        String documentType,
+
+        @JsonProperty("purpose")
+        String purpose,
+
+        @JsonProperty("challenge")
+        String challenge
+) implements Serializable {
+
+    public static final String PROTOCOL_VERSION = "1";
+
+    public CcspRequest(
+            String version, String requestId, String applicationId, String operation,
+            String algorithm, String digest, String certificateHint, String expiresAt,
+            Long timestamp, String nonce, String signatureType
+    ) {
+        this(version, requestId, applicationId, operation, algorithm, digest,
+             certificateHint, expiresAt, timestamp, nonce, signatureType,
+             null, null, null, null);
+    }
+
+    public boolean isVersionSupported() {
+        return PROTOCOL_VERSION.equals(version);
+    }
+
+    public boolean isAuthentication() {
+        return "authenticate".equalsIgnoreCase(operation)
+                || "AUTHENTICATION".equalsIgnoreCase(purpose)
+                || "AUTH_CHALLENGE".equalsIgnoreCase(documentType)
+                || (challenge != null && !challenge.isBlank());
+    }
+
+    public boolean isExpired() {
+        if (expiresAt == null || expiresAt.isBlank()) {
+            return false;
+        }
+        try {
+            Instant expiry = Instant.parse(expiresAt);
+            return Instant.now().isAfter(expiry);
+        } catch (Exception e) {
+            return false;
+        }
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/protocol/CcspResponse.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/protocol/CcspResponse.java
new file mode 100644
index 0000000..26aeb88
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/protocol/CcspResponse.java
@@ -0,0 +1,136 @@
+package br.com.cybercore.signer.core.protocol;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import java.io.Serializable;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Mensagem de resposta do CyberCore Signing Protocol (CCSP/1).
+ */
+@JsonInclude(JsonInclude.Include.NON_NULL)
+public record CcspResponse(
+        @JsonProperty("version")
+        String version,
+
+        @JsonProperty("request_id")
+        String requestId,
+
+        @JsonProperty("status")
+        String status,
+
+        @JsonProperty("signature")
+        String signature,
+
+        @JsonProperty("certificate")
+        String certificate,
+
+        @JsonProperty("certificate_chain")
+        List<String> certificateChain,
+
+        @JsonProperty("algorithm")
+        String algorithm,
+
+        @JsonProperty("error_code")
+        String errorCode,
+
+        @JsonProperty("message")
+        String message,
+
+        @JsonProperty("subject_name")
+        String subjectName,
+
+        @JsonProperty("subject_cpf_cnpj")
+        String subjectCpfCnpj,
+
+        @JsonProperty("document_name")
+        String documentName,
+
+        @JsonProperty("document_type")
+        String documentType
+) implements Serializable {
+
+    public CcspResponse {
+        certificateChain = certificateChain != null ? List.copyOf(certificateChain) : null;
+    }
+
+    @Override
+    public List<String> certificateChain() {
+        return certificateChain != null ? Collections.unmodifiableList(certificateChain) : null;
+    }
+
+    public static final String STATUS_SIGNED = "signed";
+    public static final String STATUS_AUTHENTICATED = "authenticated";
+    public static final String STATUS_SUCCESS = "success";
+    public static final String STATUS_ERROR = "error";
+
+    public static CcspResponse success(String requestId, String signatureBase64, String certBase64,
+                                       List<String> chain, String algorithm) {
+        return success(requestId, signatureBase64, certBase64, chain, algorithm, null, null, null, null);
+    }
+
+    public static CcspResponse success(String requestId, String signatureBase64, String certBase64,
+                                       List<String> chain, String algorithm,
+                                       String subjectName, String subjectCpfCnpj,
+                                       String documentName, String documentType) {
+        return new CcspResponse(
+                CcspRequest.PROTOCOL_VERSION,
+                requestId,
+                STATUS_SIGNED,
+                signatureBase64,
+                certBase64,
+                chain,
+                algorithm,
+                null,
+                null,
+                subjectName,
+                subjectCpfCnpj,
+                documentName,
+                documentType
+        );
+    }
+
+    public static CcspResponse authenticated(String requestId, String signatureBase64, String certBase64,
+                                             List<String> chain, String algorithm,
+                                             String subjectName, String subjectCpfCnpj) {
+        return new CcspResponse(
+                CcspRequest.PROTOCOL_VERSION,
+                requestId,
+                STATUS_AUTHENTICATED,
+                signatureBase64,
+                certBase64,
+                chain,
+                algorithm,
+                null,
+                null,
+                subjectName,
+                subjectCpfCnpj,
+                null,
+                "AUTH_CHALLENGE"
+        );
+    }
+
+    public static CcspResponse error(String requestId, CcspErrorCode errorCode, String message) {
+        return new CcspResponse(
+                CcspRequest.PROTOCOL_VERSION,
+                requestId,
+                STATUS_ERROR,
+                null,
+                null,
+                null,
+                null,
+                errorCode.name(),
+                message != null ? message : errorCode.getDefaultMessage(),
+                null,
+                null,
+                null,
+                null
+        );
+    }
+
+    public static CcspResponse error(String requestId, CcspErrorCode errorCode) {
+        return error(requestId, errorCode, errorCode.getDefaultMessage());
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/protocol/CcspServer.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/protocol/CcspServer.java
new file mode 100644
index 0000000..6a760d2
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/protocol/CcspServer.java
@@ -0,0 +1,550 @@
+package br.com.cybercore.signer.core.protocol;
+
+import br.com.cybercore.signer.core.crypto.DigestAlgorithm;
+import br.com.cybercore.signer.core.crypto.SigningService;
+import br.com.cybercore.signer.core.crypto.X509CertificateUtils;
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.domain.SigningContext;
+import br.com.cybercore.signer.core.domain.SigningResult;
+import java.security.MessageDigest;
+import br.com.cybercore.signer.core.provider.CertificateManager;
+import br.com.cybercore.signer.core.provider.CertificateProviderException;
+import br.com.cybercore.signer.core.security.ApplicationRegistry;
+import br.com.cybercore.signer.core.security.AuthorizedApplication;
+import br.com.cybercore.signer.core.security.NonceManager;
+import br.com.cybercore.signer.core.security.OriginValidator;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
+import com.sun.net.httpserver.HttpExchange;
+import com.sun.net.httpserver.HttpHandler;
+import com.sun.net.httpserver.HttpServer;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.InetSocketAddress;
+import java.net.URI;
+import java.nio.charset.StandardCharsets;
+import java.time.Instant;
+import java.util.Base64;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.locks.ReentrantLock;
+
+/**
+ * Servidor HTTP local do CyberCore Signing Protocol (CCSP/1).
+ * Vinculado exclusivamente ao loopback 127.0.0.1 para comunicação segura com navegadores web.
+ */
+public class CcspServer {
+
+    private static final Logger logger = LoggerFactory.getLogger(CcspServer.class);
+    public static final int DEFAULT_PORT = 21325;
+    public static final String BIND_HOST = "127.0.0.1";
+
+    private final int port;
+    private final CertificateManager certificateManager;
+    private final SigningService signingService;
+    private final ApplicationRegistry applicationRegistry;
+    private final NonceManager nonceManager;
+    private final OriginValidator originValidator;
+    private final CcspUserPromptListener promptListener;
+    private final ObjectMapper objectMapper;
+    private final ReentrantLock signLock = new ReentrantLock(true); // Concorrência FIFO
+
+    private HttpServer httpServer;
+    private ExecutorService executor;
+    private volatile boolean running = false;
+
+    public CcspServer(int port,
+                      CertificateManager certificateManager,
+                      SigningService signingService,
+                      ApplicationRegistry applicationRegistry,
+                      CcspUserPromptListener promptListener) {
+        this.port = port;
+        this.certificateManager = Objects.requireNonNull(certificateManager, "certificateManager cannot be null");
+        this.signingService = Objects.requireNonNull(signingService, "signingService cannot be null");
+        this.applicationRegistry = applicationRegistry != null ? applicationRegistry : ApplicationRegistry.getInstance();
+        this.promptListener = promptListener;
+        this.nonceManager = new NonceManager();
+        this.originValidator = new OriginValidator();
+        this.objectMapper = new ObjectMapper()
+                .registerModule(new JavaTimeModule())
+                .setSerializationInclusion(JsonInclude.Include.NON_NULL);
+    }
+
+    public CcspServer(CertificateManager certificateManager,
+                      SigningService signingService,
+                      CcspUserPromptListener promptListener) {
+        this(DEFAULT_PORT, certificateManager, signingService, ApplicationRegistry.getInstance(), promptListener);
+    }
+
+    /**
+     * Inicia o servidor local na porta configurada.
+     */
+    public synchronized void start() throws IOException {
+        if (running) {
+            return;
+        }
+
+        InetSocketAddress address = new InetSocketAddress(BIND_HOST, port);
+        httpServer = HttpServer.create(address, 50);
+
+        executor = Executors.newFixedThreadPool(8, r -> {
+            Thread t = new Thread(r, "ccsp-http-worker");
+            t.setDaemon(true);
+            return t;
+        });
+        httpServer.setExecutor(executor);
+
+        // Registra endpoints do protocolo CCSP/1
+        httpServer.createContext("/ccsp/v1/status", new StatusHandler());
+        httpServer.createContext("/ccsp/v1/certificates", new CertificatesHandler());
+        httpServer.createContext("/ccsp/v1/sign", new SignHandler());
+        httpServer.createContext("/ccsp/v1/authenticate", new SignHandler());
+        httpServer.createContext("/ccsp/v1/authorize", new AuthorizeHandler());
+
+        httpServer.start();
+        running = true;
+        logger.info("Servidor local CCSP/1 iniciado com sucesso em http://{}:{}", BIND_HOST, getPort());
+    }
+
+    /**
+     * Encerra a execução do servidor local.
+     */
+    public synchronized void stop() {
+        if (!running) {
+            return;
+        }
+
+        if (httpServer != null) {
+            httpServer.stop(1);
+            httpServer = null;
+        }
+
+        if (executor != null) {
+            executor.shutdownNow();
+            executor = null;
+        }
+
+        running = false;
+        logger.info("Servidor local CCSP/1 finalizado.");
+    }
+
+    public boolean isRunning() {
+        return running;
+    }
+
+    public int getPort() {
+        if (httpServer != null) {
+            return httpServer.getAddress().getPort();
+        }
+        return port;
+    }
+
+    // =========================================================================
+    // Handlers HTTP
+    // =========================================================================
+
+    private class StatusHandler implements HttpHandler {
+        @Override
+        public void handle(HttpExchange exchange) throws IOException {
+            if (handleCors(exchange)) return;
+
+            if (!"GET".equalsIgnoreCase(exchange.getRequestMethod())) {
+                sendErrorResponse(exchange, 405, "METHOD_NOT_ALLOWED", "Apenas GET é suportado.");
+                return;
+            }
+
+            Map<String, Object> resp = new HashMap<>();
+            resp.put("version", CcspRequest.PROTOCOL_VERSION);
+            resp.put("status", "ready");
+            resp.put("agent", "CyberCore Signer");
+            resp.put("agent_version", "0.1.0");
+            resp.put("os", System.getProperty("os.name"));
+            resp.put("timestamp", Instant.now().toString());
+
+            sendJsonResponse(exchange, 200, resp);
+        }
+    }
+
+    private class CertificatesHandler implements HttpHandler {
+        @Override
+        public void handle(HttpExchange exchange) throws IOException {
+            if (handleCors(exchange)) return;
+
+            if (!"GET".equalsIgnoreCase(exchange.getRequestMethod())) {
+                sendErrorResponse(exchange, 405, "METHOD_NOT_ALLOWED", "Apenas GET é suportado.");
+                return;
+            }
+
+            String origin = getOrigin(exchange);
+            String appId = exchange.getRequestHeaders().getFirst("X-CyberCore-AppId");
+            if (appId == null || appId.isBlank()) {
+                URI uri = exchange.getRequestURI();
+                appId = getQueryParam(uri, "application_id");
+            }
+
+            // Verifica autorização se app_id e origin forem informados
+            if (appId != null && !appId.isBlank()) {
+                boolean authorized = applicationRegistry.isAuthorized(appId, origin);
+                if (!authorized) {
+                    boolean approved = promptApplicationAuthorization(origin, "Aplicação Web", appId);
+                    if (!approved) {
+                        sendErrorResponse(exchange, 403, CcspErrorCode.APPLICATION_NOT_AUTHORIZED.name(),
+                                "Aplicação não autorizada pelo usuário.");
+                        return;
+                    }
+                }
+            }
+
+            List<ManagedCertificate> certs = certificateManager.getAvailableCertificates();
+            if (certs.isEmpty()) {
+                certs = certificateManager.discoverCertificates();
+            }
+
+            List<Map<String, Object>> certDtoList = certs.stream().map(c -> {
+                Map<String, Object> dto = new HashMap<>();
+                dto.put("id", c.id());
+                dto.put("alias", c.alias());
+                dto.put("common_name", c.commonName());
+                dto.put("subject_dn", c.subjectDn());
+                dto.put("issuer_dn", c.issuerDn());
+                dto.put("type", c.type().name());
+                dto.put("provider_id", c.providerId());
+                dto.put("device_name", c.hardwareDeviceName());
+                dto.put("valid_from", c.notBefore() != null ? c.notBefore().toString() : null);
+                dto.put("valid_to", c.notAfter() != null ? c.notAfter().toString() : null);
+                dto.put("serial_number", c.serialNumber());
+                dto.put("can_sign", c.canSign());
+                dto.put("status", c.status().name());
+                return dto;
+            }).toList();
+
+            Map<String, Object> resp = new HashMap<>();
+            resp.put("version", CcspRequest.PROTOCOL_VERSION);
+            resp.put("status", "success");
+            resp.put("certificates", certDtoList);
+
+            sendJsonResponse(exchange, 200, resp);
+        }
+    }
+
+    private class AuthorizeHandler implements HttpHandler {
+        @Override
+        public void handle(HttpExchange exchange) throws IOException {
+            if (handleCors(exchange)) return;
+
+            if (!"POST".equalsIgnoreCase(exchange.getRequestMethod())) {
+                sendErrorResponse(exchange, 405, "METHOD_NOT_ALLOWED", "Apenas POST é suportado.");
+                return;
+            }
+
+            String origin = getOrigin(exchange);
+            try (InputStream is = exchange.getRequestBody()) {
+                @SuppressWarnings("unchecked")
+                Map<String, String> body = objectMapper.readValue(is, Map.class);
+                String appId = body.get("application_id");
+                String appName = body.getOrDefault("name", "Aplicação Web");
+
+                if (appId == null || appId.isBlank()) {
+                    sendErrorResponse(exchange, 400, "BAD_REQUEST", "application_id é obrigatório.");
+                    return;
+                }
+
+                if (applicationRegistry.isAuthorized(appId, origin)) {
+                    Map<String, Object> resp = Map.of(
+                            "version", CcspRequest.PROTOCOL_VERSION,
+                            "status", "authorized",
+                            "application_id", appId
+                    );
+                    sendJsonResponse(exchange, 200, resp);
+                    return;
+                }
+
+                boolean approved = promptApplicationAuthorization(origin, appName, appId);
+                if (approved) {
+                    Map<String, Object> resp = Map.of(
+                            "version", CcspRequest.PROTOCOL_VERSION,
+                            "status", "authorized",
+                            "application_id", appId
+                    );
+                    sendJsonResponse(exchange, 200, resp);
+                } else {
+                    sendErrorResponse(exchange, 403, CcspErrorCode.APPLICATION_NOT_AUTHORIZED.name(),
+                            "Autorização negada pelo usuário.");
+                }
+            } catch (Exception e) {
+                sendErrorResponse(exchange, 400, "BAD_REQUEST", "Payload JSON inválido: " + e.getMessage());
+            }
+        }
+    }
+
+    private class SignHandler implements HttpHandler {
+        @Override
+        public void handle(HttpExchange exchange) throws IOException {
+            if (handleCors(exchange)) return;
+
+            if (!"POST".equalsIgnoreCase(exchange.getRequestMethod())) {
+                sendErrorResponse(exchange, 405, "METHOD_NOT_ALLOWED", "Apenas POST é suportado.");
+                return;
+            }
+
+            String origin = getOrigin(exchange);
+            CcspRequest request;
+            try (InputStream is = exchange.getRequestBody()) {
+                request = objectMapper.readValue(is, CcspRequest.class);
+            } catch (Exception e) {
+                sendCcspError(exchange, 400, null, CcspErrorCode.SIGNATURE_FAILED, "Payload de requisição inválido.");
+                return;
+            }
+
+            // 1. Validação de versão
+            if (!request.isVersionSupported()) {
+                sendCcspError(exchange, 400, request.requestId(), CcspErrorCode.COMMUNICATION_ERROR,
+                        "Versão do protocolo não suportada: " + request.version());
+                return;
+            }
+
+            // 2. Validação de expiração
+            if (request.isExpired()) {
+                sendCcspError(exchange, 400, request.requestId(), CcspErrorCode.REQUEST_EXPIRED,
+                        "A requisição de assinatura expirou.");
+                return;
+            }
+
+            // 3. Validação anti-replay (Nonce)
+            if (request.nonce() != null && !request.nonce().isBlank()) {
+                boolean accepted = nonceManager.registerNonce(request.nonce());
+                if (!accepted) {
+                    sendCcspError(exchange, 400, request.requestId(), CcspErrorCode.REPLAY_DETECTED,
+                            "Requisição duplicada detectada (replay prevenido).");
+                    return;
+                }
+            }
+
+            // 4. Validação de autorização da aplicação
+            String appId = request.applicationId();
+            if (appId == null || appId.isBlank()) {
+                sendCcspError(exchange, 400, request.requestId(), CcspErrorCode.APPLICATION_NOT_AUTHORIZED,
+                        "application_id é obrigatório.");
+                return;
+            }
+
+            if (!applicationRegistry.isAuthorized(appId, origin)) {
+                boolean approved = promptApplicationAuthorization(origin, "Aplicação Web", appId);
+                if (!approved) {
+                    sendCcspError(exchange, 403, request.requestId(), CcspErrorCode.APPLICATION_NOT_AUTHORIZED,
+                            "Aplicação não autorizada pelo usuário.");
+                    return;
+                }
+            }
+
+            // 5. Validação de digest / challenge
+            byte[] digestBytes;
+            if (request.digest() != null && !request.digest().isBlank()) {
+                try {
+                    digestBytes = Base64.getDecoder().decode(request.digest());
+                } catch (Exception e) {
+                    sendCcspError(exchange, 400, request.requestId(), CcspErrorCode.SIGNATURE_FAILED,
+                            "Digest em Base64 inválido.");
+                    return;
+                }
+            } else if (request.challenge() != null && !request.challenge().isBlank()) {
+                try {
+                    MessageDigest md = MessageDigest.getInstance("SHA-256");
+                    digestBytes = md.digest(request.challenge().getBytes(StandardCharsets.UTF_8));
+                } catch (Exception e) {
+                    sendCcspError(exchange, 500, request.requestId(), CcspErrorCode.SIGNATURE_FAILED,
+                            "Falha ao gerar digest do desafio: " + e.getMessage());
+                    return;
+                }
+            } else {
+                sendCcspError(exchange, 400, request.requestId(), CcspErrorCode.SIGNATURE_FAILED,
+                        "É obrigatório informar 'digest' ou 'challenge' para a operação.");
+                return;
+            }
+
+            // 6. Resolução do certificado
+            Optional<ManagedCertificate> certOpt = certificateManager.findByHint(request.certificateHint());
+            if (certOpt.isEmpty()) {
+                sendCcspError(exchange, 404, request.requestId(), CcspErrorCode.CERTIFICATE_NOT_FOUND,
+                        "Nenhum certificado correspondente encontrado.");
+                return;
+            }
+            ManagedCertificate cert = certOpt.get();
+
+            // 7. Confirmação do usuário na UI (se listener configurado)
+            if (promptListener != null) {
+                try {
+                    CompletableFuture<Boolean> approvalFuture = promptListener.requestSignatureConfirmation(request, cert);
+                    Boolean confirmed = approvalFuture.get(60, TimeUnit.SECONDS);
+                    if (!Boolean.TRUE.equals(confirmed)) {
+                        sendCcspError(exchange, 400, request.requestId(), CcspErrorCode.USER_CANCELLED,
+                                "Operação de assinatura cancelada pelo usuário.");
+                        return;
+                    }
+                } catch (Exception e) {
+                    logger.warn("Falha ou timeout na confirmação visual de assinatura: {}", e.getMessage());
+                    sendCcspError(exchange, 400, request.requestId(), CcspErrorCode.USER_CANCELLED,
+                            "Confirmação da assinatura expirou ou foi cancelada.");
+                    return;
+                }
+            }
+
+            // 8. Assinatura com controle sequencial FIFO
+            signLock.lock();
+            try {
+                SigningContext ctx = new SigningContext(
+                        request.requestId(),
+                        request.applicationId(),
+                        digestBytes,
+                        request.algorithm() != null ? request.algorithm() : "SHA256withRSA",
+                        cert.id(),
+                        Instant.now()
+                );
+
+                SigningResult result = signingService.sign(ctx);
+                String sigBase64 = Base64.getEncoder().encodeToString(result.signatureBytes());
+
+                String subjectName = X509CertificateUtils.extractHolderName(cert.commonName());
+                String cpfCnpj = cert.cpf() != null ? cert.cpf() : cert.cnpj();
+                boolean isAuth = request.isAuthentication() || exchange.getRequestURI().getPath().endsWith("/authenticate");
+
+                CcspResponse response = isAuth
+                        ? CcspResponse.authenticated(
+                                request.requestId(),
+                                sigBase64,
+                                result.certificateBase64(),
+                                result.certificateChainBase64(),
+                                result.algorithm(),
+                                subjectName,
+                                cpfCnpj
+                        )
+                        : CcspResponse.success(
+                                request.requestId(),
+                                sigBase64,
+                                result.certificateBase64(),
+                                result.certificateChainBase64(),
+                                result.algorithm(),
+                                subjectName,
+                                cpfCnpj,
+                                request.documentName(),
+                                request.documentType()
+                        );
+
+                sendJsonResponse(exchange, 200, response);
+
+            } catch (CertificateProviderException cpe) {
+                sendCcspError(exchange, 400, request.requestId(), cpe.getErrorCode(), cpe.getMessage());
+            } catch (Exception e) {
+                logger.error("Erro inesperado na assinatura: {}", e.getMessage(), e);
+                sendCcspError(exchange, 500, request.requestId(), CcspErrorCode.SIGNATURE_FAILED,
+                        "Erro interno: " + e.getMessage());
+            } finally {
+                signLock.unlock();
+            }
+        }
+    }
+
+    // =========================================================================
+    // Utilitários de Segurança e HTTP
+    // =========================================================================
+
+    private boolean promptApplicationAuthorization(String origin, String appName, String appId) {
+        if (promptListener == null) {
+            // Em testes unitários sem UI, aprova e registra
+            applicationRegistry.register(new AuthorizedApplication(
+                    appId, appName, origin != null ? Set.of(origin) : Set.of("*"), true, Instant.now()
+            ));
+            return true;
+        }
+
+        try {
+            CompletableFuture<Boolean> future = promptListener.requestApplicationAuthorization(origin, appName, appId);
+            Boolean approved = future.get(30, TimeUnit.SECONDS);
+            if (Boolean.TRUE.equals(approved)) {
+                applicationRegistry.register(new AuthorizedApplication(
+                        appId, appName, origin != null ? Set.of(origin) : Set.of("*"), true, Instant.now()
+                ));
+                return true;
+            }
+        } catch (Exception e) {
+            logger.warn("Timeout ou erro na autorização da aplicação: {}", e.getMessage());
+        }
+        return false;
+    }
+
+    private boolean handleCors(HttpExchange exchange) throws IOException {
+        String origin = getOrigin(exchange);
+        if (origin == null || origin.isBlank()) {
+            origin = "*";
+        }
+
+        exchange.getResponseHeaders().set("Access-Control-Allow-Origin", origin);
+        exchange.getResponseHeaders().set("Access-Control-Allow-Methods", "GET, POST, OPTIONS");
+        exchange.getResponseHeaders().set("Access-Control-Allow-Headers", "Content-Type, Authorization, X-CyberCore-AppId, X-CyberCore-Nonce");
+        exchange.getResponseHeaders().set("Access-Control-Max-Age", "86400");
+
+        if ("OPTIONS".equalsIgnoreCase(exchange.getRequestMethod())) {
+            exchange.sendResponseHeaders(204, -1);
+            exchange.close();
+            return true;
+        }
+        return false;
+    }
+
+    private String getOrigin(HttpExchange exchange) {
+        String origin = exchange.getRequestHeaders().getFirst("Origin");
+        if (origin == null || origin.isBlank()) {
+            origin = exchange.getRequestHeaders().getFirst("Referer");
+        }
+        return origin;
+    }
+
+    private String getQueryParam(URI uri, String key) {
+        if (uri.getQuery() == null) return null;
+        for (String param : uri.getQuery().split("&")) {
+            String[] pair = param.split("=");
+            if (pair.length == 2 && pair[0].equalsIgnoreCase(key)) {
+                return pair[1];
+            }
+        }
+        return null;
+    }
+
+    private void sendJsonResponse(HttpExchange exchange, int statusCode, Object data) throws IOException {
+        byte[] bytes = objectMapper.writeValueAsBytes(data);
+        exchange.getResponseHeaders().set("Content-Type", "application/json; charset=UTF-8");
+        exchange.sendResponseHeaders(statusCode, bytes.length);
+        try (OutputStream os = exchange.getResponseBody()) {
+            os.write(bytes);
+        }
+    }
+
+    private void sendErrorResponse(HttpExchange exchange, int httpStatus, String code, String message) throws IOException {
+        Map<String, Object> err = Map.of(
+                "version", CcspRequest.PROTOCOL_VERSION,
+                "status", "error",
+                "error_code", code,
+                "message", message
+        );
+        sendJsonResponse(exchange, httpStatus, err);
+    }
+
+    private void sendCcspError(HttpExchange exchange, int httpStatus, String reqId, CcspErrorCode code, String msg) throws IOException {
+        CcspResponse err = CcspResponse.error(reqId, code, msg != null ? msg : code.getDefaultMessage());
+        sendJsonResponse(exchange, httpStatus, err);
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/protocol/CcspUserPromptListener.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/protocol/CcspUserPromptListener.java
new file mode 100644
index 0000000..df692ee
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/protocol/CcspUserPromptListener.java
@@ -0,0 +1,31 @@
+package br.com.cybercore.signer.core.protocol;
+
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+
+import java.util.concurrent.CompletableFuture;
+
+/**
+ * Interface de interação com o usuário para autorização de aplicações e confirmação de assinaturas.
+ * Permite desacoplar o servidor HTTP de comunicação da interface gráfica desktop (JavaFX).
+ */
+public interface CcspUserPromptListener {
+
+    /**
+     * Solicita ao usuário autorização para que uma nova aplicação web se comunique com o agente.
+     *
+     * @param origin        Origem HTTP/HTTPS da aplicação (ex: https://sistema.exemplo.com.br).
+     * @param appName       Nome amigável da aplicação solicitante.
+     * @param applicationId ID único da aplicação.
+     * @return Future completado com {@code true} se o usuário autorizar; {@code false} caso recuse.
+     */
+    CompletableFuture<Boolean> requestApplicationAuthorization(String origin, String appName, String applicationId);
+
+    /**
+     * Solicita ao usuário confirmação visual explícita antes de realizar uma assinatura digital.
+     *
+     * @param request     Requisição CCSP de assinatura recebida.
+     * @param certificate Certificado digital selecionado para a operação.
+     * @return Future completado com {@code true} se o usuário confirmar; {@code false} caso cancele.
+     */
+    CompletableFuture<Boolean> requestSignatureConfirmation(CcspRequest request, ManagedCertificate certificate);
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/CertificateManager.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/CertificateManager.java
new file mode 100644
index 0000000..707fad0
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/CertificateManager.java
@@ -0,0 +1,194 @@
+package br.com.cybercore.signer.core.provider;
+
+import br.com.cybercore.signer.core.domain.CertificateStatus;
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+/**
+ * Gerenciador central de certificados digitais do CyberCore Signer.
+ * Responsável pela descoberta em múltiplos provedores (Windows Certificate Store, A1, PKCS#11),
+ * validação de integridade, mapeamento de provedores e seleção segura para operações de assinatura.
+ */
+public class CertificateManager {
+
+    private static final Logger logger = LoggerFactory.getLogger(CertificateManager.class);
+
+    private final List<CertificateProvider> providers = new CopyOnWriteArrayList<>();
+    private final Map<String, CertificateProvider> certificateToProviderMap = new ConcurrentHashMap<>();
+    private final Map<String, ManagedCertificate> cachedCertificates = new ConcurrentHashMap<>();
+
+    public CertificateManager() {
+    }
+
+    /**
+     * Cria e inicializa uma instância padrão do CertificateManager com os provedores nativos da plataforma.
+     */
+    public static CertificateManager createDefault() {
+        CertificateManager manager = new CertificateManager();
+        manager.registerProvider(new WindowsCertificateStoreProvider());
+        manager.registerProvider(new Pkcs12CertificateProvider());
+        manager.registerProvider(new Pkcs11CertificateProvider());
+        return manager;
+    }
+
+    /**
+     * Registra um provedor de certificados no ecossistema do agente.
+     */
+    public void registerProvider(CertificateProvider provider) {
+        Objects.requireNonNull(provider, "Provedor não pode ser nulo.");
+        // Evita duplicidade por providerId
+        providers.removeIf(p -> p.getProviderId().equalsIgnoreCase(provider.getProviderId()));
+        providers.add(provider);
+        logger.info("Provedor registrado no CertificateManager: {} [{}] (disponível={})",
+                provider.getDisplayName(), provider.getProviderId(), provider.isAvailable());
+    }
+
+    /**
+     * Remove um provedor previamente registrado.
+     */
+    public void unregisterProvider(String providerId) {
+        if (providerId != null) {
+            providers.removeIf(p -> p.getProviderId().equalsIgnoreCase(providerId));
+            certificateToProviderMap.values().removeIf(p -> p.getProviderId().equalsIgnoreCase(providerId));
+        }
+    }
+
+    public List<CertificateProvider> getProviders() {
+        return Collections.unmodifiableList(providers);
+    }
+
+    /**
+     * Executa a descoberta de certificados em todos os provedores operacionais.
+     * Consolida os resultados, atualiza o mapeamento de provedores e ordena por relevância/disponibilidade.
+     */
+    public synchronized List<ManagedCertificate> discoverCertificates() {
+        logger.info("Iniciando descoberta de certificados digitais nos provedores ativos...");
+
+        certificateToProviderMap.clear();
+        cachedCertificates.clear();
+        List<ManagedCertificate> discovered = new ArrayList<>();
+
+        for (CertificateProvider provider : providers) {
+            if (!provider.isAvailable()) {
+                logger.debug("Provedor '{}' não disponível no momento. Ignorando na descoberta.", provider.getProviderId());
+                continue;
+            }
+
+            try {
+                List<ManagedCertificate> certs = provider.listCertificates();
+                logger.info("Provedor '{}' retornou {} certificado(s).", provider.getProviderId(), certs.size());
+
+                for (ManagedCertificate cert : certs) {
+                    certificateToProviderMap.put(cert.id(), provider);
+                    cachedCertificates.put(cert.id(), cert);
+                    discovered.add(cert);
+                }
+            } catch (Exception e) {
+                logger.error("Erro ao listar certificados do provedor '{}': {}", provider.getProviderId(), e.getMessage());
+            }
+        }
+
+        // Ordenação: certificados disponíveis primeiro, depois por nome do titular
+        discovered.sort(Comparator
+                .comparing((ManagedCertificate c) -> c.status() == CertificateStatus.AVAILABLE ? 0 : 1)
+                .thenComparing(ManagedCertificate::commonName, String.CASE_INSENSITIVE_ORDER));
+
+        logger.info("Descoberta concluída: {} certificado(s) total no agente.", discovered.size());
+        return Collections.unmodifiableList(discovered);
+    }
+
+    /**
+     * Retorna o provedor responsável pelo certificado com o ID informado.
+     */
+    public CertificateProvider getProviderForCertificate(String certId) {
+        if (certId == null) {
+            return null;
+        }
+        return certificateToProviderMap.get(certId);
+    }
+
+    /**
+     * Obtém o material criptográfico (chave privada e cadeia X.509) do certificado especificado.
+     */
+    public Optional<br.com.cybercore.signer.core.domain.SigningKeyMaterial> getKeyMaterial(String certId, char[] pinOrPassword) throws CertificateProviderException {
+        CertificateProvider provider = getProviderForCertificate(certId);
+        if (provider == null) {
+            return Optional.empty();
+        }
+        return provider.getKeyMaterial(certId, pinOrPassword);
+    }
+
+    /**
+     * Busca um certificado previamente descoberto pelo seu identificador único.
+     */
+    public Optional<ManagedCertificate> findById(String certId) {
+        if (certId == null) {
+            return Optional.empty();
+        }
+        return Optional.ofNullable(cachedCertificates.get(certId));
+    }
+
+    /**
+     * Localiza um certificado usando hints flexíveis: id, alias, CPF, CNPJ ou impressões digitais SHA-1/SHA-256.
+     */
+    public Optional<ManagedCertificate> findByHint(String hint) {
+        if (hint == null || hint.isBlank()) {
+            return Optional.empty();
+        }
+        String cleanHint = hint.trim();
+
+        // 1. Busca por ID direto
+        ManagedCertificate direct = cachedCertificates.get(cleanHint);
+        if (direct != null) {
+            return Optional.of(direct);
+        }
+
+        // 2. Busca por alias, CPF, CNPJ ou fingerprints
+        for (ManagedCertificate cert : cachedCertificates.values()) {
+            if (cleanHint.equalsIgnoreCase(cert.alias())
+                    || cleanHint.equalsIgnoreCase(cert.cpf())
+                    || cleanHint.equalsIgnoreCase(cert.cnpj())
+                    || cleanHint.equalsIgnoreCase(cert.sha1Fingerprint())
+                    || cleanHint.equalsIgnoreCase(cert.sha256Fingerprint())
+                    || cleanHint.equalsIgnoreCase(cert.serialNumber())) {
+                return Optional.of(cert);
+            }
+        }
+
+        return Optional.empty();
+    }
+
+    /**
+     * Retorna a lista dos certificados em cache que possuem status AVAILABLE (com chave privada e vigentes).
+     */
+    public List<ManagedCertificate> getAvailableCertificates() {
+        return cachedCertificates.values().stream()
+                .filter(c -> c.status() == CertificateStatus.AVAILABLE)
+                .toList();
+    }
+
+    /**
+     * Solicita recarregamento de todos os provedores cadastrados.
+     */
+    public void refreshAll() {
+        for (CertificateProvider provider : providers) {
+            try {
+                provider.refresh();
+            } catch (Exception e) {
+                logger.warn("Erro ao recarregar provedor '{}': {}", provider.getProviderId(), e.getMessage());
+            }
+        }
+        discoverCertificates();
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/CertificateProvider.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/CertificateProvider.java
new file mode 100644
index 0000000..d790db4
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/CertificateProvider.java
@@ -0,0 +1,61 @@
+package br.com.cybercore.signer.core.provider;
+
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.domain.SigningContext;
+import br.com.cybercore.signer.core.domain.SigningResult;
+
+import java.util.List;
+
+/**
+ * Contrato base para provedores de descoberta e assinatura com certificados digitais.
+ * Permite plugar diferentes backends (A1 em arquivo, Windows-MY, PKCS#11, Mock)
+ * sem acoplar o núcleo do aplicativo a fabricantes ou dispositivos específicos.
+ */
+public interface CertificateProvider {
+
+    /**
+     * Identificador único do provedor (ex: "provider-a1", "provider-win-store", "provider-pkcs11").
+     */
+    String getProviderId();
+
+    /**
+     * Nome legível para apresentação na interface e diagnósticos.
+     */
+    String getDisplayName();
+
+    /**
+     * Tipo do provedor.
+     */
+    ProviderType getType();
+
+    /**
+     * Indica se o provedor está disponível e operacional no sistema atual.
+     */
+    boolean isAvailable();
+
+    /**
+     * Lista os certificados disponíveis atualmente através deste provedor.
+     */
+    List<ManagedCertificate> listCertificates() throws CertificateProviderException;
+
+    /**
+     * Executa a assinatura do digest contido no contexto.
+     * A chave privada NUNCA deve sair do provedor/dispositivo.
+     */
+    SigningResult sign(SigningContext context) throws CertificateProviderException;
+
+    /**
+     * Retorna o material criptográfico (chave privada e cadeia) do certificado indicado,
+     * permitindo que operações que montam envelopes como PAdES ou XMLDSig operem localmente.
+     */
+    default java.util.Optional<br.com.cybercore.signer.core.domain.SigningKeyMaterial> getKeyMaterial(String certificateId, char[] pinOrPassword) throws CertificateProviderException {
+        return java.util.Optional.empty();
+    }
+
+    /**
+     * Solicita recarga ou reescaneamento de certificados e dispositivos.
+     */
+    default void refresh() {
+        // Implementação padrão opcional
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/CertificateProviderException.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/CertificateProviderException.java
new file mode 100644
index 0000000..b544251
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/CertificateProviderException.java
@@ -0,0 +1,32 @@
+package br.com.cybercore.signer.core.provider;
+
+import br.com.cybercore.signer.core.protocol.CcspErrorCode;
+
+/**
+ * Exceção disparada por falhas nos provedores de certificado.
+ * Carrega obrigatoriamente um código de erro padronizado do CCSP.
+ */
+public class CertificateProviderException extends Exception {
+
+    private static final long serialVersionUID = 1L;
+
+    private final CcspErrorCode errorCode;
+
+    public CertificateProviderException(CcspErrorCode errorCode, String message) {
+        super(message);
+        this.errorCode = errorCode != null ? errorCode : CcspErrorCode.SIGNATURE_FAILED;
+    }
+
+    public CertificateProviderException(CcspErrorCode errorCode, String message, Throwable cause) {
+        super(message, cause);
+        this.errorCode = errorCode != null ? errorCode : CcspErrorCode.SIGNATURE_FAILED;
+    }
+
+    public CertificateProviderException(CcspErrorCode errorCode) {
+        this(errorCode, errorCode != null ? errorCode.getDefaultMessage() : CcspErrorCode.SIGNATURE_FAILED.getDefaultMessage());
+    }
+
+    public CcspErrorCode getErrorCode() {
+        return errorCode;
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/Pkcs11CertificateProvider.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/Pkcs11CertificateProvider.java
new file mode 100644
index 0000000..22ca67b
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/Pkcs11CertificateProvider.java
@@ -0,0 +1,247 @@
+package br.com.cybercore.signer.core.provider;
+
+import br.com.cybercore.signer.core.crypto.DigestAlgorithm;
+import br.com.cybercore.signer.core.crypto.X509CertificateUtils;
+import br.com.cybercore.signer.core.domain.CertificateType;
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.domain.SigningContext;
+import br.com.cybercore.signer.core.domain.SigningResult;
+import br.com.cybercore.signer.core.protocol.CcspErrorCode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
+import java.security.KeyStore;
+import java.security.KeyStoreException;
+import java.security.PrivateKey;
+import java.security.Provider;
+import java.security.Security;
+import java.security.Signature;
+import java.security.cert.Certificate;
+import java.security.cert.X509Certificate;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.Base64;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * Provedor de certificados A3 via interface padrão PKCS#11 (tokens USB, smart cards e leitores).
+ * Utiliza o provider SunPKCS11 integrado à JVM para comunicação com middlewares dos fabricantes.
+ * Nunca persiste PIN em disco e nunca o transmite para servidores web.
+ */
+public class Pkcs11CertificateProvider implements CertificateProvider {
+
+    private static final Logger logger = LoggerFactory.getLogger(Pkcs11CertificateProvider.class);
+    private static final String PROVIDER_ID = "provider-pkcs11";
+
+    /**
+     * Bibliotecas PKCS#11 comuns de middleware para tokens e smartcards no Windows e Linux.
+     */
+    private static final String[] WELL_KNOWN_LIBRARIES = {
+            // Windows
+            "C:/Windows/System32/eps2003csp11.dll", // SafeNet / eToken
+            "C:/Windows/System32/aetpkss1.dll",     // SafeSign AET
+            "C:/Windows/System32/acospkcs11.dll",   // ACO / Giesecke & Devrient
+            "C:/Windows/System32/opensc-pkcs11.dll",// OpenSC Windows
+            // Linux
+            "/usr/lib/x86_64-linux-gnu/opensc-pkcs11.so",
+            "/usr/lib/opensc-pkcs11.so",
+            "/usr/lib/libaetpkss.so"
+    };
+
+    private Provider sunPkcs11Provider;
+    private KeyStore keyStore;
+    private String detectedLibraryPath;
+
+    public Pkcs11CertificateProvider() {
+        detectAndInitialize();
+    }
+
+    private synchronized void detectAndInitialize() {
+        for (String libPath : WELL_KNOWN_LIBRARIES) {
+            File f = new File(libPath);
+            if (f.exists() && f.canRead()) {
+                detectedLibraryPath = libPath;
+                logger.info("Middleware PKCS#11 detectado no sistema: {}", libPath);
+                break;
+            }
+        }
+    }
+
+    /**
+     * Permite registrar explicitamente um provider PKCS#11 já inicializado (ex: via SunPKCS11 com PIN do usuário).
+     */
+    public synchronized void setProvider(Provider provider, KeyStore keyStore) {
+        this.sunPkcs11Provider = provider;
+        this.keyStore = keyStore;
+    }
+
+    @Override
+    public String getProviderId() {
+        return PROVIDER_ID;
+    }
+
+    @Override
+    public String getDisplayName() {
+        return "Hardware PKCS#11 (Smart Card / Token USB)";
+    }
+
+    @Override
+    public ProviderType getType() {
+        return ProviderType.A3_PKCS11;
+    }
+
+    @Override
+    public synchronized boolean isAvailable() {
+        return (detectedLibraryPath != null) || (keyStore != null);
+    }
+
+    public synchronized String getDetectedLibraryPath() {
+        return detectedLibraryPath;
+    }
+
+    @Override
+    public synchronized List<ManagedCertificate> listCertificates() throws CertificateProviderException {
+        if (keyStore == null) {
+            // Se o middleware estiver detectado mas o token ainda não estiver autenticado via PIN
+            return Collections.emptyList();
+        }
+
+        try {
+            List<ManagedCertificate> certificates = new ArrayList<>();
+            Enumeration<String> aliases = keyStore.aliases();
+
+            while (aliases.hasMoreElements()) {
+                String alias = aliases.nextElement();
+                boolean isKeyEntry = keyStore.isKeyEntry(alias);
+                Certificate cert = keyStore.getCertificate(alias);
+
+                if (!(cert instanceof X509Certificate x509)) {
+                    continue;
+                }
+
+                String certId = "p11-" + Integer.toHexString(alias.hashCode());
+                ManagedCertificate mc = X509CertificateUtils.toManagedCertificate(
+                        certId,
+                        alias,
+                        x509,
+                        CertificateType.A3,
+                        isKeyEntry,
+                        PROVIDER_ID,
+                        "Token USB / Smart Card (PKCS#11)"
+                );
+                certificates.add(mc);
+            }
+
+            return Collections.unmodifiableList(certificates);
+        } catch (KeyStoreException e) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.PKCS11_ERROR,
+                    "Falha ao ler certificados do dispositivo PKCS#11: " + e.getMessage(),
+                    e
+            );
+        }
+    }
+
+    @Override
+    public synchronized SigningResult sign(SigningContext context) throws CertificateProviderException {
+        Objects.requireNonNull(context, "Contexto de assinatura não pode ser nulo.");
+
+        if (keyStore == null) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.TOKEN_NOT_FOUND,
+                    "Dispositivo PKCS#11 não conectado ou não autenticado com PIN."
+            );
+        }
+
+        DigestAlgorithm alg = DigestAlgorithm.fromName(context.algorithm());
+        alg.validateDigestLength(context.digest());
+
+        String targetAlias = resolveAlias(context.certificateHint());
+        if (targetAlias == null) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.CERTIFICATE_NOT_FOUND,
+                    "Certificado não encontrado no dispositivo PKCS#11."
+            );
+        }
+
+        try {
+            PrivateKey privateKey = (PrivateKey) keyStore.getKey(targetAlias, null);
+            if (privateKey == null) {
+                throw new CertificateProviderException(
+                        CcspErrorCode.PRIVATE_KEY_NOT_AVAILABLE,
+                        "Chave privada inacessível no dispositivo PKCS#11."
+                );
+            }
+
+            Certificate[] chain = keyStore.getCertificateChain(targetAlias);
+            if (chain == null || chain.length == 0) {
+                Certificate singleCert = keyStore.getCertificate(targetAlias);
+                if (singleCert != null) {
+                    chain = new Certificate[]{singleCert};
+                } else {
+                    throw new CertificateProviderException(
+                            CcspErrorCode.CERTIFICATE_NOT_FOUND,
+                            "Cadeia do certificado não encontrada no dispositivo PKCS#11."
+                    );
+                }
+            }
+
+            logger.info("Executando assinatura digital no hardware PKCS#11 [alg={}]", alg.getJcaName());
+
+            Signature signature = (sunPkcs11Provider != null)
+                    ? Signature.getInstance(alg.getJcaName(), sunPkcs11Provider)
+                    : Signature.getInstance(alg.getJcaName());
+
+            signature.initSign(privateKey);
+            signature.update(context.digest());
+            byte[] signatureBytes = signature.sign();
+
+            String certBase64 = Base64.getEncoder().encodeToString(chain[0].getEncoded());
+            List<String> chainBase64 = new ArrayList<>();
+            for (Certificate c : chain) {
+                chainBase64.add(Base64.getEncoder().encodeToString(c.getEncoded()));
+            }
+
+            return new SigningResult(
+                    context.requestId(),
+                    signatureBytes,
+                    certBase64,
+                    chainBase64,
+                    alg.getJcaName(),
+                    Instant.now()
+            );
+
+        } catch (CertificateProviderException cpe) {
+            throw cpe;
+        } catch (Exception e) {
+            logger.error("Erro na assinatura via dispositivo PKCS#11: {}", e.getMessage(), e);
+            throw new CertificateProviderException(
+                    CcspErrorCode.PKCS11_ERROR,
+                    "Erro ao assinar com o dispositivo PKCS#11: " + e.getMessage(),
+                    e
+            );
+        }
+    }
+
+    private String resolveAlias(String hint) {
+        try {
+            Enumeration<String> aliases = keyStore.aliases();
+            List<String> list = Collections.list(aliases);
+            if (hint == null || hint.isBlank()) {
+                return list.isEmpty() ? null : list.get(0);
+            }
+            for (String alias : list) {
+                String certId = "p11-" + Integer.toHexString(alias.hashCode());
+                if (alias.equalsIgnoreCase(hint) || certId.equalsIgnoreCase(hint)) {
+                    return alias;
+                }
+            }
+        } catch (Exception ignored) {
+        }
+        return null;
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/Pkcs12CertificateProvider.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/Pkcs12CertificateProvider.java
new file mode 100644
index 0000000..ee6ef23
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/Pkcs12CertificateProvider.java
@@ -0,0 +1,318 @@
+package br.com.cybercore.signer.core.provider;
+
+import br.com.cybercore.signer.core.crypto.DigestAlgorithm;
+import br.com.cybercore.signer.core.crypto.X509CertificateUtils;
+import br.com.cybercore.signer.core.domain.CertificateType;
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.domain.SigningContext;
+import br.com.cybercore.signer.core.domain.SigningResult;
+import br.com.cybercore.signer.core.protocol.CcspErrorCode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.ByteArrayInputStream;
+import java.io.InputStream;
+import java.security.KeyStore;
+import java.security.KeyStoreException;
+import java.security.PrivateKey;
+import java.security.Signature;
+import java.security.cert.Certificate;
+import java.security.cert.X509Certificate;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.Base64;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * Provedor de certificados A1 em formato PKCS#12 (.pfx / .p12).
+ * Mantém chaves e senhas isoladas na memória local do agente sem persistência insegura ou vazamento em logs.
+ */
+public class Pkcs12CertificateProvider implements CertificateProvider {
+
+    private static final Logger logger = LoggerFactory.getLogger(Pkcs12CertificateProvider.class);
+    private static final String PROVIDER_ID = "provider-a1";
+
+    private final String providerId;
+    private final String displayName;
+    private KeyStore keyStore;
+    private char[] currentPassword;
+
+    public Pkcs12CertificateProvider() {
+        this(PROVIDER_ID, "Certificados A1 (PKCS#12)");
+    }
+
+    public Pkcs12CertificateProvider(String providerId, String displayName) {
+        this.providerId = Objects.requireNonNull(providerId);
+        this.displayName = Objects.requireNonNull(displayName);
+    }
+
+    /**
+     * Carrega um KeyStore PKCS#12 diretamente a partir de bytes.
+     * A senha é utilizada exclusivamente para decifrar a chave em memória e nunca é gravada em logs.
+     */
+    public synchronized void loadFromBytes(byte[] pfxData, char[] password) throws CertificateProviderException {
+        Objects.requireNonNull(pfxData, "Dados do certificado não podem ser nulos.");
+        try (ByteArrayInputStream bais = new ByteArrayInputStream(pfxData)) {
+            loadFromStream(bais, password);
+        } catch (CertificateProviderException cpe) {
+            throw cpe;
+        } catch (Exception e) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.CERTIFICATE_INVALID,
+                    "Falha ao processar arquivo PKCS#12: " + e.getMessage(),
+                    e
+            );
+        }
+    }
+
+    /**
+     * Carrega um KeyStore PKCS#12 a partir de um InputStream.
+     */
+    public synchronized void loadFromStream(InputStream stream, char[] password) throws CertificateProviderException {
+        try {
+            KeyStore ks = KeyStore.getInstance("PKCS12");
+            ks.load(stream, password);
+            this.keyStore = ks;
+            this.currentPassword = password != null ? password.clone() : new char[0];
+            logger.info("KeyStore PKCS#12 carregado com sucesso no provedor '{}'", providerId);
+        } catch (Exception e) {
+            String msg = e.getMessage() != null ? e.getMessage().toLowerCase() : "";
+            if (msg.contains("password") || msg.contains("keystore password was incorrect") || msg.contains("mac")) {
+                throw new CertificateProviderException(
+                        CcspErrorCode.PIN_INCORRECT,
+                        "Senha do certificado A1 incorreta.",
+                        e
+                );
+            }
+            throw new CertificateProviderException(
+                    CcspErrorCode.CERTIFICATE_INVALID,
+                    "Não foi possível carregar o arquivo PKCS#12: " + e.getMessage(),
+                    e
+            );
+        }
+    }
+
+    /**
+     * Define diretamente uma instância de KeyStore PKCS#12 pré-carregada (útil em testes ou integrações).
+     */
+    public synchronized void setKeyStore(KeyStore keyStore, char[] password) {
+        this.keyStore = keyStore;
+        this.currentPassword = password != null ? password.clone() : new char[0];
+    }
+
+    public synchronized void clear() {
+        this.keyStore = null;
+        if (this.currentPassword != null) {
+            java.util.Arrays.fill(this.currentPassword, ' ');
+            this.currentPassword = null;
+        }
+    }
+
+    @Override
+    public String getProviderId() {
+        return providerId;
+    }
+
+    @Override
+    public String getDisplayName() {
+        return displayName;
+    }
+
+    @Override
+    public ProviderType getType() {
+        return ProviderType.A1_FILE;
+    }
+
+    @Override
+    public synchronized boolean isAvailable() {
+        return keyStore != null;
+    }
+
+    @Override
+    public synchronized List<ManagedCertificate> listCertificates() throws CertificateProviderException {
+        if (!isAvailable()) {
+            return Collections.emptyList();
+        }
+
+        try {
+            List<ManagedCertificate> certificates = new ArrayList<>();
+            Enumeration<String> aliases = keyStore.aliases();
+
+            while (aliases.hasMoreElements()) {
+                String alias = aliases.nextElement();
+                boolean isKeyEntry = keyStore.isKeyEntry(alias);
+                Certificate cert = keyStore.getCertificate(alias);
+
+                if (!(cert instanceof X509Certificate x509)) {
+                    continue;
+                }
+
+                String certId = "a1-" + Integer.toHexString(alias.hashCode());
+                ManagedCertificate mc = X509CertificateUtils.toManagedCertificate(
+                        certId,
+                        alias,
+                        x509,
+                        CertificateType.A1,
+                        isKeyEntry,
+                        providerId,
+                        "Arquivo PKCS#12 (.pfx/.p12)"
+                );
+                certificates.add(mc);
+            }
+
+            return Collections.unmodifiableList(certificates);
+        } catch (KeyStoreException e) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.PROVIDER_NOT_AVAILABLE,
+                    "Erro ao consultar certificados do KeyStore PKCS#12: " + e.getMessage(),
+                    e
+            );
+        }
+    }
+
+    @Override
+    public synchronized SigningResult sign(SigningContext context) throws CertificateProviderException {
+        Objects.requireNonNull(context, "Contexto de assinatura não pode ser nulo.");
+
+        if (!isAvailable()) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.PROVIDER_NOT_AVAILABLE,
+                    "Nenhum certificado A1 carregado neste provedor."
+            );
+        }
+
+        DigestAlgorithm alg = DigestAlgorithm.fromName(context.algorithm());
+        alg.validateDigestLength(context.digest());
+
+        String targetAlias = resolveAlias(context.certificateHint());
+        if (targetAlias == null) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.CERTIFICATE_NOT_FOUND,
+                    "Certificado A1 não encontrado para a requisição: " + context.certificateHint()
+            );
+        }
+
+        try {
+            PrivateKey privateKey = (PrivateKey) keyStore.getKey(targetAlias, currentPassword);
+            if (privateKey == null) {
+                throw new CertificateProviderException(
+                        CcspErrorCode.PRIVATE_KEY_NOT_AVAILABLE,
+                        "Chave privada não encontrada para o certificado: " + targetAlias
+                );
+            }
+
+            Certificate[] chain = keyStore.getCertificateChain(targetAlias);
+            if (chain == null || chain.length == 0) {
+                Certificate singleCert = keyStore.getCertificate(targetAlias);
+                if (singleCert != null) {
+                    chain = new Certificate[]{singleCert};
+                } else {
+                    throw new CertificateProviderException(
+                            CcspErrorCode.CERTIFICATE_NOT_FOUND,
+                            "Cadeia de certificados ausente para o alias: " + targetAlias
+                    );
+                }
+            }
+
+            logger.info("Executando assinatura com certificado A1 [alg={}]", alg.getJcaName());
+
+            Signature signature = Signature.getInstance(alg.getJcaName());
+            signature.initSign(privateKey);
+            signature.update(context.digest());
+            byte[] signatureBytes = signature.sign();
+
+            String certBase64 = Base64.getEncoder().encodeToString(chain[0].getEncoded());
+            List<String> chainBase64 = new ArrayList<>();
+            for (Certificate c : chain) {
+                chainBase64.add(Base64.getEncoder().encodeToString(c.getEncoded()));
+            }
+
+            return new SigningResult(
+                    context.requestId(),
+                    signatureBytes,
+                    certBase64,
+                    chainBase64,
+                    alg.getJcaName(),
+                    Instant.now()
+            );
+
+        } catch (CertificateProviderException cpe) {
+            throw cpe;
+        } catch (Exception e) {
+            logger.error("Erro ao realizar assinatura com certificado A1: {}", e.getMessage(), e);
+            throw new CertificateProviderException(
+                    CcspErrorCode.SIGNATURE_FAILED,
+                    "Erro ao assinar com certificado A1: " + e.getMessage(),
+                    e
+            );
+        }
+    }
+
+    @Override
+    public synchronized java.util.Optional<br.com.cybercore.signer.core.domain.SigningKeyMaterial> getKeyMaterial(String certificateId, char[] pinOrPassword) throws CertificateProviderException {
+        if (!isAvailable()) {
+            return java.util.Optional.empty();
+        }
+        String targetAlias = resolveAlias(certificateId);
+        if (targetAlias == null) {
+            return java.util.Optional.empty();
+        }
+        char[] passToUse = (currentPassword != null && currentPassword.length > 0) ? currentPassword : pinOrPassword;
+        try {
+            PrivateKey privateKey = (PrivateKey) keyStore.getKey(targetAlias, passToUse);
+            if (privateKey == null) {
+                return java.util.Optional.empty();
+            }
+            Certificate[] chain = keyStore.getCertificateChain(targetAlias);
+            if (chain == null || chain.length == 0) {
+                Certificate single = keyStore.getCertificate(targetAlias);
+                if (single != null) {
+                    chain = new Certificate[]{single};
+                }
+            }
+            if (chain == null || chain.length == 0) {
+                return java.util.Optional.empty();
+            }
+            X509Certificate[] x509Chain = new X509Certificate[chain.length];
+            for (int i = 0; i < chain.length; i++) {
+                x509Chain[i] = (X509Certificate) chain[i];
+            }
+            return java.util.Optional.of(new br.com.cybercore.signer.core.domain.SigningKeyMaterial(privateKey, x509Chain, null));
+        } catch (Exception e) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.SIGNATURE_FAILED,
+                    "Falha ao obter chave privada e certificados A1: " + e.getMessage(),
+                    e
+            );
+        }
+    }
+
+    private String resolveAlias(String hint) {
+        try {
+            Enumeration<String> aliases = keyStore.aliases();
+            List<String> list = Collections.list(aliases);
+            if (hint == null || hint.isBlank()) {
+                return list.isEmpty() ? null : list.get(0);
+            }
+            for (String alias : list) {
+                String certId = "a1-" + Integer.toHexString(alias.hashCode());
+                if (alias.equalsIgnoreCase(hint) || certId.equalsIgnoreCase(hint)) {
+                    return alias;
+                }
+                Certificate c = keyStore.getCertificate(alias);
+                if (c instanceof X509Certificate x509) {
+                    String sha1 = X509CertificateUtils.calculateFingerprint(x509, "SHA-1");
+                    String sha256 = X509CertificateUtils.calculateFingerprint(x509, "SHA-256");
+                    if (sha1.equalsIgnoreCase(hint) || sha256.equalsIgnoreCase(hint)) {
+                        return alias;
+                    }
+                }
+            }
+        } catch (Exception ignored) {
+        }
+        return null;
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/ProviderType.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/ProviderType.java
new file mode 100644
index 0000000..b8976c4
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/ProviderType.java
@@ -0,0 +1,21 @@
+package br.com.cybercore.signer.core.provider;
+
+/**
+ * Classificação da tecnologia ou repositório do provedor de certificados.
+ */
+public enum ProviderType {
+    A1_FILE("Arquivo PKCS#12 (.pfx/.p12)"),
+    A3_WINDOWS_STORE("Windows Certificate Store (CAPI/CNG)"),
+    A3_PKCS11("Hardware PKCS#11 (Smart Card / Token USB)"),
+    MOCK("Simulador de Desenvolvimento");
+
+    private final String description;
+
+    ProviderType(String description) {
+        this.description = description;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/WindowsCertificateStoreProvider.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/WindowsCertificateStoreProvider.java
new file mode 100644
index 0000000..9fd01cf
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/provider/WindowsCertificateStoreProvider.java
@@ -0,0 +1,307 @@
+package br.com.cybercore.signer.core.provider;
+
+import br.com.cybercore.signer.core.crypto.DigestAlgorithm;
+import br.com.cybercore.signer.core.crypto.X509CertificateUtils;
+import br.com.cybercore.signer.core.domain.CertificateStatus;
+import br.com.cybercore.signer.core.domain.CertificateType;
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.domain.SigningContext;
+import br.com.cybercore.signer.core.domain.SigningResult;
+import br.com.cybercore.signer.core.protocol.CcspErrorCode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.security.KeyStore;
+import java.security.PrivateKey;
+import java.security.Signature;
+import java.security.cert.Certificate;
+import java.security.cert.X509Certificate;
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+import java.util.ArrayList;
+import java.util.Base64;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * Provedor de certificados integrado nativamente ao repositório de certificados do Windows (Windows-MY).
+ * Utiliza o subsistema SunMSCAPI/CAPI/CNG para gerenciar chaves privadas e certificados A1/A3 sem expor credenciais.
+ */
+public class WindowsCertificateStoreProvider implements CertificateProvider {
+
+    private static final Logger logger = LoggerFactory.getLogger(WindowsCertificateStoreProvider.class);
+    private static final String PROVIDER_ID = "provider-win-store";
+    private static final String KEYSTORE_TYPE = "Windows-MY";
+
+    private KeyStore keyStore;
+    private final boolean isWindows;
+
+    public WindowsCertificateStoreProvider() {
+        String osName = System.getProperty("os.name", "").toLowerCase();
+        this.isWindows = osName.contains("win");
+        if (this.isWindows) {
+            initKeyStore();
+        }
+    }
+
+    private synchronized void initKeyStore() {
+        try {
+            this.keyStore = KeyStore.getInstance(KEYSTORE_TYPE);
+            this.keyStore.load(null, null);
+            logger.info("Windows Certificate Store (Windows-MY) inicializado com sucesso.");
+        } catch (Throwable t) {
+            logger.warn("Não foi possível carregar o repositório Windows-MY: {}", t.getMessage());
+            this.keyStore = null;
+        }
+    }
+
+    @Override
+    public String getProviderId() {
+        return PROVIDER_ID;
+    }
+
+    @Override
+    public String getDisplayName() {
+        return "Windows Certificate Store (Windows-MY)";
+    }
+
+    @Override
+    public ProviderType getType() {
+        return ProviderType.A3_WINDOWS_STORE;
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return isWindows && keyStore != null;
+    }
+
+    @Override
+    public synchronized List<ManagedCertificate> listCertificates() throws CertificateProviderException {
+        if (!isAvailable()) {
+            return Collections.emptyList();
+        }
+
+        try {
+            // Recarrega o repositório para detectar tokens recém-inseridos
+            this.keyStore.load(null, null);
+
+            List<ManagedCertificate> certificates = new ArrayList<>();
+            Enumeration<String> aliases = keyStore.aliases();
+
+            while (aliases.hasMoreElements()) {
+                String alias = aliases.nextElement();
+                try {
+                    if (!keyStore.isKeyEntry(alias)) {
+                        continue;
+                    }
+
+                    Certificate cert = keyStore.getCertificate(alias);
+                    if (!(cert instanceof X509Certificate x509)) {
+                        continue;
+                    }
+
+                    // Heurística de tipo A1 vs A3:
+                    // ICP-Brasil A3 tem tipicamente 3 anos (validade > ~400 dias).
+                    // A1 tem validade de até 1 ano (<= 370 dias).
+                    long validityDays = ChronoUnit.DAYS.between(x509.getNotBefore().toInstant(), x509.getNotAfter().toInstant());
+                    CertificateType certType = validityDays > 400 ? CertificateType.A3 : CertificateType.A1;
+                    String deviceName = certType == CertificateType.A3
+                            ? "Token / Smart Card (Windows CAPI/CNG)"
+                            : "Repositório do Windows (Software A1)";
+
+                    String certId = "win-" + Integer.toHexString(alias.hashCode());
+
+                    ManagedCertificate managedCert = X509CertificateUtils.toManagedCertificate(
+                            certId,
+                            alias,
+                            x509,
+                            certType,
+                            true,
+                            PROVIDER_ID,
+                            deviceName
+                    );
+
+                    certificates.add(managedCert);
+                } catch (Exception e) {
+                    logger.warn("Ignorando alias '{}' devido a erro na leitura: {}", alias, e.getMessage());
+                }
+            }
+
+            return Collections.unmodifiableList(certificates);
+        } catch (Exception e) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.PROVIDER_NOT_AVAILABLE,
+                    "Falha ao enumerar certificados do Windows Certificate Store: " + e.getMessage(),
+                    e
+            );
+        }
+    }
+
+    @Override
+    public synchronized SigningResult sign(SigningContext context) throws CertificateProviderException {
+        Objects.requireNonNull(context, "Contexto de assinatura não pode ser nulo.");
+
+        if (!isAvailable()) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.PROVIDER_NOT_AVAILABLE,
+                    "Repositório Windows Certificate Store não está disponível neste sistema operacional."
+            );
+        }
+
+        // Valida algoritmo e tamanho de digest
+        DigestAlgorithm alg = DigestAlgorithm.fromName(context.algorithm());
+        alg.validateDigestLength(context.digest());
+
+        String targetAlias = resolveAlias(context.certificateHint());
+        if (targetAlias == null) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.CERTIFICATE_NOT_FOUND,
+                    "Nenhum certificado correspondente encontrado no Windows Certificate Store para o hint: " + context.certificateHint()
+            );
+        }
+
+        try {
+            PrivateKey privateKey = (PrivateKey) keyStore.getKey(targetAlias, null);
+            if (privateKey == null) {
+                throw new CertificateProviderException(
+                        CcspErrorCode.PRIVATE_KEY_NOT_AVAILABLE,
+                        "Chave privada não acessível para o certificado: " + targetAlias
+                );
+            }
+
+            Certificate[] chain = keyStore.getCertificateChain(targetAlias);
+            if (chain == null || chain.length == 0) {
+                Certificate singleCert = keyStore.getCertificate(targetAlias);
+                if (singleCert != null) {
+                    chain = new Certificate[]{singleCert};
+                } else {
+                    throw new CertificateProviderException(
+                            CcspErrorCode.CERTIFICATE_NOT_FOUND,
+                            "Cadeia de certificação não encontrada para o alias: " + targetAlias
+                    );
+                }
+            }
+
+            logger.info("Executando assinatura digital com algoritmo {} via Windows-MY para alias '{}'",
+                    alg.getJcaName(), targetAlias);
+
+            Signature signature = Signature.getInstance(alg.getJcaName());
+            signature.initSign(privateKey);
+            signature.update(context.digest());
+            byte[] signatureBytes = signature.sign();
+
+            String certBase64 = Base64.getEncoder().encodeToString(chain[0].getEncoded());
+            List<String> chainBase64 = new ArrayList<>();
+            for (Certificate c : chain) {
+                chainBase64.add(Base64.getEncoder().encodeToString(c.getEncoded()));
+            }
+
+            return new SigningResult(
+                    context.requestId(),
+                    signatureBytes,
+                    certBase64,
+                    chainBase64,
+                    alg.getJcaName(),
+                    Instant.now()
+            );
+
+        } catch (CertificateProviderException cpe) {
+            throw cpe;
+        } catch (Exception e) {
+            logger.error("Erro durante a assinatura via Windows-MY: {}", e.getMessage(), e);
+            throw new CertificateProviderException(
+                    CcspErrorCode.SIGNATURE_FAILED,
+                    "Erro ao assinar com o Windows Certificate Store: " + e.getMessage(),
+                    e
+            );
+        } finally {
+            try {
+                // Força liberação de handles no SunMSCAPI para que o driver de SmartCard/Token
+                // possa reavaliar o estado de autenticação de PIN
+                if (keyStore != null) {
+                    keyStore.load(null, null);
+                }
+            } catch (Exception ignored) {
+            }
+
+            // Se configurado para sempre exigir PIN (sem cache), forçamos o reset da sessão no Smart Card
+            // para que o Windows BaseCSP e o SafeSign invalidem o cache de processo e peçam o PIN na próxima assinatura
+            if (br.com.cybercore.signer.core.security.PinSessionManager.getInstance().isAlwaysPromptPin()) {
+                br.com.cybercore.signer.core.security.SmartCardSessionManager.resetCardSessions();
+            }
+        }
+    }
+
+    private String resolveAlias(String hint) {
+        if (hint == null || hint.isBlank()) {
+            return null;
+        }
+        try {
+            Enumeration<String> aliases = keyStore.aliases();
+            while (aliases.hasMoreElements()) {
+                String alias = aliases.nextElement();
+                String certId = "win-" + Integer.toHexString(alias.hashCode());
+                if (alias.equalsIgnoreCase(hint) || certId.equalsIgnoreCase(hint)) {
+                    return alias;
+                }
+                Certificate c = keyStore.getCertificate(alias);
+                if (c instanceof X509Certificate x509) {
+                    String sha1 = X509CertificateUtils.calculateFingerprint(x509, "SHA-1");
+                    String sha256 = X509CertificateUtils.calculateFingerprint(x509, "SHA-256");
+                    if (sha1.equalsIgnoreCase(hint) || sha256.equalsIgnoreCase(hint)) {
+                        return alias;
+                    }
+                }
+            }
+        } catch (Exception ignored) {
+        }
+        return null;
+    }
+
+    @Override
+    public synchronized java.util.Optional<br.com.cybercore.signer.core.domain.SigningKeyMaterial> getKeyMaterial(String certificateId, char[] pinOrPassword) throws CertificateProviderException {
+        if (!isAvailable()) {
+            return java.util.Optional.empty();
+        }
+        String targetAlias = resolveAlias(certificateId);
+        if (targetAlias == null) {
+            return java.util.Optional.empty();
+        }
+        try {
+            PrivateKey privateKey = (PrivateKey) keyStore.getKey(targetAlias, null);
+            if (privateKey == null) {
+                return java.util.Optional.empty();
+            }
+            Certificate[] chain = keyStore.getCertificateChain(targetAlias);
+            if (chain == null || chain.length == 0) {
+                Certificate single = keyStore.getCertificate(targetAlias);
+                if (single != null) {
+                    chain = new Certificate[]{single};
+                }
+            }
+            if (chain == null || chain.length == 0) {
+                return java.util.Optional.empty();
+            }
+            X509Certificate[] x509Chain = new X509Certificate[chain.length];
+            for (int i = 0; i < chain.length; i++) {
+                x509Chain[i] = (X509Certificate) chain[i];
+            }
+            return java.util.Optional.of(new br.com.cybercore.signer.core.domain.SigningKeyMaterial(privateKey, x509Chain, keyStore.getProvider()));
+        } catch (Exception e) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.SIGNATURE_FAILED,
+                    "Falha ao obter chave privada e certificados no Windows Store: " + e.getMessage(),
+                    e
+            );
+        }
+    }
+
+    @Override
+    public synchronized void refresh() {
+        if (isWindows) {
+            initKeyStore();
+        }
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/ApplicationRegistry.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/ApplicationRegistry.java
new file mode 100644
index 0000000..234239d
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/ApplicationRegistry.java
@@ -0,0 +1,162 @@
+package br.com.cybercore.signer.core.security;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * Registro de aplicações web autorizadas a se comunicar com o agente CyberCore Signer.
+ * Suporta persistência segura no diretório do usuário (~/.cybercore/authorized-apps.json).
+ */
+public final class ApplicationRegistry {
+
+    private static final Logger logger = LoggerFactory.getLogger(ApplicationRegistry.class);
+    private static final String DEFAULT_FILE_NAME = "authorized-apps.json";
+
+    private static final ApplicationRegistry INSTANCE = new ApplicationRegistry();
+
+    private final Path storagePath;
+    private final Map<String, AuthorizedApplication> applications = new ConcurrentHashMap<>();
+    private final ObjectMapper objectMapper;
+
+    public static ApplicationRegistry getInstance() {
+        return INSTANCE;
+    }
+
+    public ApplicationRegistry() {
+        this(resolveDefaultStoragePath());
+    }
+
+    public ApplicationRegistry(Path storagePath) {
+        this.storagePath = storagePath;
+        this.objectMapper = new ObjectMapper().registerModule(new JavaTimeModule());
+        load();
+    }
+
+    private static Path resolveDefaultStoragePath() {
+        String userHome = System.getProperty("user.home", ".");
+        return Path.of(userHome, ".cybercore", DEFAULT_FILE_NAME);
+    }
+
+    /**
+     * Busca uma aplicação pelo seu ID único.
+     */
+    public Optional<AuthorizedApplication> findById(String applicationId) {
+        if (applicationId == null || applicationId.isBlank()) {
+            return Optional.empty();
+        }
+        return Optional.ofNullable(applications.get(applicationId));
+    }
+
+    /**
+     * Busca uma aplicação que contenha a origem especificada autorizada.
+     */
+    public Optional<AuthorizedApplication> findByOrigin(String origin) {
+        if (origin == null || origin.isBlank()) {
+            return Optional.empty();
+        }
+        return applications.values().stream()
+                .filter(app -> app.isOriginAllowed(origin))
+                .findFirst();
+    }
+
+    /**
+     * Verifica se uma aplicação e sua respectiva origem estão autorizadas e ativas.
+     */
+    public boolean isAuthorized(String applicationId, String origin) {
+        Optional<AuthorizedApplication> appOpt = findById(applicationId);
+        return appOpt.map(app -> app.isOriginAllowed(origin)).orElse(false);
+    }
+
+    /**
+     * Registra ou atualiza uma aplicação autorizada e persiste a alteração.
+     */
+    public synchronized void register(AuthorizedApplication app) {
+        Objects.requireNonNull(app, "Aplicação não pode ser nula");
+        applications.put(app.applicationId(), app);
+        logger.info("Aplicação registrada: '{}' [id={}] com origens: {}", app.name(), app.applicationId(), app.allowedOrigins());
+        save();
+    }
+
+    /**
+     * Revoga a autorização de uma aplicação.
+     */
+    public synchronized void revoke(String applicationId) {
+        if (applicationId != null && applications.remove(applicationId) != null) {
+            logger.info("Autorização revogada para a aplicação [id={}]", applicationId);
+            save();
+        }
+    }
+
+    /**
+     * Retorna a lista imutável de todas as aplicações cadastradas.
+     */
+    public List<AuthorizedApplication> listAll() {
+        return Collections.unmodifiableList(new ArrayList<>(applications.values()));
+    }
+
+    /**
+     * Carrega as aplicações persistidas em disco.
+     */
+    public synchronized void load() {
+        if (storagePath == null || !Files.exists(storagePath)) {
+            logger.debug("Nenhum arquivo de aplicações persistidas encontrado em {}", storagePath);
+            return;
+        }
+
+        try {
+            List<AuthorizedApplication> list = objectMapper.readValue(
+                    storagePath.toFile(),
+                    new TypeReference<List<AuthorizedApplication>>() {}
+            );
+            applications.clear();
+            for (AuthorizedApplication app : list) {
+                applications.put(app.applicationId(), app);
+            }
+            logger.info("Carregadas {} aplicação(ões) autorizada(s) de {}", applications.size(), storagePath);
+        } catch (Exception e) {
+            logger.warn("Falha ao ler aplicações autorizadas de {}: {}", storagePath, e.getMessage());
+        }
+    }
+
+    /**
+     * Salva as aplicações atuais em disco.
+     */
+    public synchronized void save() {
+        if (storagePath == null) {
+            return;
+        }
+
+        try {
+            Path parent = storagePath.getParent();
+            if (parent != null && !Files.exists(parent)) {
+                Files.createDirectories(parent);
+            }
+            objectMapper.writerWithDefaultPrettyPrinter().writeValue(
+                    storagePath.toFile(),
+                    new ArrayList<>(applications.values())
+            );
+            logger.debug("Aplicações autorizadas salvas com sucesso em {}", storagePath);
+        } catch (Exception e) {
+            logger.error("Erro ao salvar aplicações autorizadas em {}: {}", storagePath, e.getMessage());
+        }
+    }
+
+    public synchronized void clear() {
+        applications.clear();
+        save();
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/AuthorizedApplication.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/AuthorizedApplication.java
new file mode 100644
index 0000000..ab6dc29
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/AuthorizedApplication.java
@@ -0,0 +1,44 @@
+package br.com.cybercore.signer.core.security;
+
+import java.io.Serializable;
+import java.time.Instant;
+import java.util.List;
+import java.util.Objects;
+import java.util.Set;
+
+/**
+ * Representa uma aplicação web autorizada a solicitar assinaturas ao CyberCore Signer.
+ */
+public record AuthorizedApplication(
+        String applicationId,
+        String name,
+        Set<String> allowedOrigins,
+        boolean enabled,
+        Instant registeredAt
+) implements Serializable {
+
+    public AuthorizedApplication {
+        Objects.requireNonNull(applicationId, "applicationId must not be null");
+        Objects.requireNonNull(name, "name must not be null");
+        allowedOrigins = allowedOrigins != null ? Set.copyOf(allowedOrigins) : Set.of();
+        if (registeredAt == null) {
+            registeredAt = Instant.now();
+        }
+    }
+
+    /**
+     * Verifica se uma determinada Origin web está autorizada para esta aplicação.
+     */
+    public boolean isOriginAllowed(String origin) {
+        if (!enabled || origin == null || origin.isBlank()) {
+            return false;
+        }
+        String normalized = origin.trim().toLowerCase();
+        for (String allowed : allowedOrigins) {
+            if (allowed.trim().toLowerCase().equals(normalized)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/NonceManager.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/NonceManager.java
new file mode 100644
index 0000000..bb3d85b
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/NonceManager.java
@@ -0,0 +1,53 @@
+package br.com.cybercore.signer.core.security;
+
+import java.time.Duration;
+import java.time.Instant;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * Gerenciador de nonces em memória para proteção contra ataques de replay (CCSP/1).
+ * Garante que uma requisição com o mesmo nonce e correlation_id não seja reprocessada.
+ */
+public class NonceManager {
+
+    private final Duration windowDuration;
+    private final ConcurrentHashMap<String, Instant> usedNonces = new ConcurrentHashMap<>();
+
+    public NonceManager(Duration windowDuration) {
+        this.windowDuration = windowDuration != null ? windowDuration : Duration.ofSeconds(120);
+    }
+
+    public NonceManager() {
+        this(Duration.ofSeconds(120));
+    }
+
+    /**
+     * Tenta registrar um nonce.
+     *
+     * @param nonce Nonce gerado pelo cliente/requisição.
+     * @return {@code true} se o nonce for novo e válido; {@code false} se já tiver sido utilizado (replay).
+     */
+    public boolean registerNonce(String nonce) {
+        if (nonce == null || nonce.isBlank()) {
+            return false;
+        }
+
+        cleanupExpired();
+
+        Instant now = Instant.now();
+        Instant existing = usedNonces.putIfAbsent(nonce, now);
+        return existing == null;
+    }
+
+    /**
+     * Remove nonces expirados além da janela máxima de aceitação.
+     */
+    public void cleanupExpired() {
+        Instant cutoff = Instant.now().minus(windowDuration);
+        usedNonces.entrySet().removeIf(entry -> entry.getValue().isBefore(cutoff));
+    }
+
+    public int activeNonceCount() {
+        return usedNonces.size();
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/OriginValidator.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/OriginValidator.java
new file mode 100644
index 0000000..87f6fd5
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/OriginValidator.java
@@ -0,0 +1,44 @@
+package br.com.cybercore.signer.core.security;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.net.URI;
+import java.util.Objects;
+import java.util.Set;
+
+/**
+ * Validador estrito de origens web conforme as especificações de segurança do protocolo CCSP.
+ */
+public class OriginValidator {
+
+    private static final Logger logger = LoggerFactory.getLogger(OriginValidator.class);
+
+    /**
+     * Valida se a origem recebida na requisição corresponde às origens autorizadas da aplicação.
+     */
+    public boolean isAllowed(String requestOrigin, AuthorizedApplication application) {
+        if (application == null || !application.enabled()) {
+            logger.warn("Aplicação nula ou desabilitada durante validação de origem.");
+            return false;
+        }
+
+        if (requestOrigin == null || requestOrigin.isBlank()) {
+            logger.warn("Requisição sem cabeçalho Origin rejeitada para a aplicação {}", application.applicationId());
+            return false;
+        }
+
+        try {
+            URI uri = URI.create(requestOrigin.trim());
+            String normalizedOrigin = uri.getScheme() + "://" + uri.getAuthority();
+            boolean allowed = application.isOriginAllowed(normalizedOrigin);
+            if (!allowed) {
+                logger.warn("Origem '{}' rejeitada para a aplicação '{}'", normalizedOrigin, application.applicationId());
+            }
+            return allowed;
+        } catch (Exception e) {
+            logger.warn("Origem malformatada '{}': {}", requestOrigin, e.getMessage());
+            return false;
+        }
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/PinSessionManager.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/PinSessionManager.java
new file mode 100644
index 0000000..9d83944
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/PinSessionManager.java
@@ -0,0 +1,106 @@
+package br.com.cybercore.signer.core.security;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Arrays;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * Gerenciador de PIN e credenciais voláteis de sessão do CyberCore Signer.
+ * Armazena temporariamente em memória RAM (nunca em disco) o PIN de tokens A3
+ * exclusivamente quando o usuário autorizar explicitamente a opção "Salvar PIN na sessão".
+ * Todas as senhas e PINs são sobrescritos com espaços em branco (' ') no descarte.
+ */
+public class PinSessionManager {
+
+    private static final Logger logger = LoggerFactory.getLogger(PinSessionManager.class);
+
+    private static final PinSessionManager INSTANCE = new PinSessionManager();
+
+    private final Map<String, char[]> sessionPins = new ConcurrentHashMap<>();
+    private volatile boolean alwaysPromptPin = false;
+
+    public PinSessionManager() {
+    }
+
+    public static PinSessionManager getInstance() {
+        return INSTANCE;
+    }
+
+    /**
+     * Salva o PIN de um certificado/token para a sessão atual em memória volátil.
+     */
+    public synchronized void savePin(String certId, char[] pin) {
+        Objects.requireNonNull(certId, "certId must not be null");
+        if (pin == null || pin.length == 0) {
+            clearPin(certId);
+            return;
+        }
+
+        // Limpa PIN anterior caso exista
+        clearPin(certId);
+
+        sessionPins.put(certId, pin.clone());
+        logger.debug("PIN salvo em memória de sessão para o certificado '{}'. Tamanho: {} dígitos", certId, pin.length);
+    }
+
+    /**
+     * Recupera o PIN salvo em sessão para o certificado informado.
+     */
+    public synchronized char[] getPin(String certId) {
+        if (certId == null || alwaysPromptPin) {
+            return null;
+        }
+        char[] stored = sessionPins.get(certId);
+        return stored != null ? stored.clone() : null;
+    }
+
+    /**
+     * Verifica se existe um PIN válido salvo nesta sessão para o certificado.
+     */
+    public synchronized boolean hasPin(String certId) {
+        if (certId == null || alwaysPromptPin) {
+            return false;
+        }
+        return sessionPins.containsKey(certId);
+    }
+
+    /**
+     * Remove o PIN salvo para um certificado específico, zerando a memória.
+     */
+    public synchronized void clearPin(String certId) {
+        if (certId != null) {
+            char[] old = sessionPins.remove(certId);
+            if (old != null) {
+                Arrays.fill(old, ' ');
+            }
+        }
+    }
+
+    /**
+     * Limpa imediatamente todos os PINs em memória e zera seus caracteres.
+     */
+    public synchronized void clearAll() {
+        for (char[] pin : sessionPins.values()) {
+            if (pin != null) {
+                Arrays.fill(pin, ' ');
+            }
+        }
+        sessionPins.clear();
+        logger.info("Todos os PINs em memória de sessão foram limpos e zerados com sucesso.");
+    }
+
+    public boolean isAlwaysPromptPin() {
+        return alwaysPromptPin;
+    }
+
+    public void setAlwaysPromptPin(boolean alwaysPromptPin) {
+        this.alwaysPromptPin = alwaysPromptPin;
+        if (alwaysPromptPin) {
+            clearAll();
+        }
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/SmartCardSessionManager.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/SmartCardSessionManager.java
new file mode 100644
index 0000000..8bafeda
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/SmartCardSessionManager.java
@@ -0,0 +1,69 @@
+package br.com.cybercore.signer.core.security;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.lang.reflect.Method;
+import java.util.List;
+
+/**
+ * Gerencia sessões de hardware Smart Card (Tokens USB / Cartões ICP-Brasil) no nível do subsistema PC/SC (winscard).
+ * Permite forçar o reset do canal do cartão para invalidar caches de PIN de processo (BaseCSP / Minidriver),
+ * garantindo que novas operações de assinatura exijam autenticação explícita quando configurado.
+ */
+public final class SmartCardSessionManager {
+
+    private static final Logger logger = LoggerFactory.getLogger(SmartCardSessionManager.class);
+
+    private SmartCardSessionManager() {
+    }
+
+    /**
+     * Reseta as conexões ativas com todos os terminais Smart Card conectados que possuam cartão presente.
+     * Envia o comando SCARD_RESET_CARD (warm reset via javax.smartcardio Card.disconnect(true)),
+     * invalidando o estado de autenticação de PIN nos drivers e no CryptoAPI/CNG do Windows.
+     */
+    @SuppressWarnings("unchecked")
+    public static void resetCardSessions() {
+        try {
+            Class<?> tfClass = Class.forName("javax.smartcardio.TerminalFactory");
+            Method getDefaultMethod = tfClass.getMethod("getDefault");
+            Object factory = getDefaultMethod.invoke(null);
+
+            Method terminalsMethod = factory.getClass().getMethod("terminals");
+            Object cardTerminals = terminalsMethod.invoke(factory);
+
+            Class<?> stateEnumClass = Class.forName("javax.smartcardio.CardTerminals$State");
+            Object cardPresent = Enum.valueOf((Class<Enum>) stateEnumClass, "CARD_PRESENT");
+
+            Method listMethod = cardTerminals.getClass().getMethod("list", stateEnumClass);
+            List<?> terminals = (List<?>) listMethod.invoke(cardTerminals, cardPresent);
+
+            if (terminals == null || terminals.isEmpty()) {
+                logger.debug("Nenhum terminal Smart Card com cartão presente encontrado para reset de sessão.");
+                return;
+            }
+
+            for (Object terminal : terminals) {
+                try {
+                    Method getNameMethod = terminal.getClass().getMethod("getName");
+                    String termName = (String) getNameMethod.invoke(terminal);
+
+                    Method connectMethod = terminal.getClass().getMethod("connect", String.class);
+                    Object card = connectMethod.invoke(terminal, "*");
+
+                    if (card != null) {
+                        Method disconnectMethod = card.getClass().getMethod("disconnect", boolean.class);
+                        // disconnect(true) envia SCARD_RESET_CARD ao driver do Windows / SafeSign
+                        disconnectMethod.invoke(card, true);
+                        logger.info("Sessão de Smart Card resetada com sucesso no terminal '{}' (cache de PIN invalidado)", termName);
+                    }
+                } catch (Throwable cardError) {
+                    logger.debug("Falha ao resetar terminal Smart Card individual: {}", cardError.getMessage());
+                }
+            }
+        } catch (Throwable t) {
+            logger.debug("SmartCardIO não disponível ou sem suporte no ambiente: {}", t.getMessage());
+        }
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/SmartCardWatcher.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/SmartCardWatcher.java
new file mode 100644
index 0000000..71e70aa
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/security/SmartCardWatcher.java
@@ -0,0 +1,197 @@
+package br.com.cybercore.signer.core.security;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.lang.reflect.Method;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+/**
+ * Monitor em segundo plano para detecção em tempo real de inserção e remoção física
+ * de Smart Cards e Tokens USB ICP-Brasil via subsistema PC/SC (javax.smartcardio).
+ *
+ * Implementa os requisitos 5 e 13 do CyberCore Signer:
+ * - Detecta conexão e remoção de hardware;
+ * - Registra logs explícitos de auditoria para eventos de TOKEN_REMOVED;
+ * - Invalida automaticamente sessões e caches de PIN quando um dispositivo físico é removido;
+ * - Notifica observadores (ex: UI e CertificateManager) para atualização em tempo real.
+ */
+public class SmartCardWatcher {
+
+    private static final Logger logger = LoggerFactory.getLogger(SmartCardWatcher.class);
+
+    public interface CardEventListener {
+        void onCardInserted(String terminalName);
+        void onCardRemoved(String terminalName);
+    }
+
+    private final List<CardEventListener> listeners = new CopyOnWriteArrayList<>();
+    private final Set<String> knownCards = Collections.synchronizedSet(new HashSet<>());
+
+    private volatile boolean running = false;
+    private Thread watcherThread;
+
+    public SmartCardWatcher() {
+    }
+
+    public void addListener(CardEventListener listener) {
+        if (listener != null) {
+            listeners.add(listener);
+        }
+    }
+
+    public void removeListener(CardEventListener listener) {
+        listeners.remove(listener);
+    }
+
+    /**
+     * Inicia o thread de monitoramento contínuo em segundo plano.
+     */
+    public synchronized void start() {
+        if (running) {
+            return;
+        }
+
+        running = true;
+        watcherThread = new Thread(this::pollLoop, "smartcard-hardware-watcher");
+        watcherThread.setDaemon(true);
+        watcherThread.start();
+        logger.info("Monitoramento dinâmico de hardware Smart Card / Token USB iniciado.");
+    }
+
+    /**
+     * Finaliza o monitoramento.
+     */
+    public synchronized void stop() {
+        running = false;
+        if (watcherThread != null) {
+            watcherThread.interrupt();
+            watcherThread = null;
+        }
+        logger.info("Monitoramento dinâmico de hardware Smart Card / Token USB finalizado.");
+    }
+
+    public boolean isRunning() {
+        return running;
+    }
+
+    @SuppressWarnings({"unchecked", "rawtypes"})
+    private void pollLoop() {
+        Object cardTerminals = null;
+        Method waitForChangeMethod = null;
+        Method listMethod = null;
+        Object cardPresentState = null;
+
+        try {
+            Class<?> tfClass = Class.forName("javax.smartcardio.TerminalFactory");
+            Method getDefaultMethod = tfClass.getMethod("getDefault");
+            Object factory = getDefaultMethod.invoke(null);
+
+            Method terminalsMethod = factory.getClass().getMethod("terminals");
+            cardTerminals = terminalsMethod.invoke(factory);
+
+            Class<?> stateEnumClass = Class.forName("javax.smartcardio.CardTerminals$State");
+            cardPresentState = Enum.valueOf((Class<Enum>) stateEnumClass, "CARD_PRESENT");
+
+            listMethod = cardTerminals.getClass().getMethod("list", stateEnumClass);
+            waitForChangeMethod = cardTerminals.getClass().getMethod("waitForChange", long.class);
+
+            // Popula estado inicial
+            Set<String> initial = getCurrentTerminalsWithCards(cardTerminals, listMethod, cardPresentState);
+            knownCards.addAll(initial);
+
+        } catch (Throwable t) {
+            logger.debug("Subsistema PC/SC (javax.smartcardio) indisponível ou sem suporte neste ambiente: {}", t.getMessage());
+            return;
+        }
+
+        while (running) {
+            try {
+                // Aguarda alteração de estado no hardware (timeout de 1.5s para checar flag running)
+                Boolean changed = (Boolean) waitForChangeMethod.invoke(cardTerminals, 1500L);
+
+                if (Boolean.TRUE.equals(changed) || !running) {
+                    if (!running) break;
+
+                    Set<String> current = getCurrentTerminalsWithCards(cardTerminals, listMethod, cardPresentState);
+
+                    // Dispositivos removidos
+                    Set<String> removed = new HashSet<>(knownCards);
+                    removed.removeAll(current);
+                    for (String term : removed) {
+                        logger.warn("AUDITORIA [TOKEN_REMOVED]: Smart Card / Token USB desconectado do terminal '{}'", term);
+                        // Ao remover o token, zera imediatamente PINs salvos em memória por segurança
+                        PinSessionManager.getInstance().clearAll();
+                        SmartCardSessionManager.resetCardSessions();
+                        notifyRemoved(term);
+                    }
+
+                    // Dispositivos inseridos
+                    Set<String> inserted = new HashSet<>(current);
+                    inserted.removeAll(knownCards);
+                    for (String term : inserted) {
+                        logger.info("AUDITORIA: Smart Card / Token USB detectado no terminal '{}'", term);
+                        notifyInserted(term);
+                    }
+
+                    knownCards.clear();
+                    knownCards.addAll(current);
+                }
+            } catch (Throwable e) {
+                if (e instanceof InterruptedException || (e.getCause() instanceof InterruptedException)) {
+                    Thread.currentThread().interrupt();
+                    break;
+                }
+                if (!running) break;
+                // Espera curta para evitar consumo excessivo de CPU em caso de falha transitória
+                try {
+                    Thread.sleep(2000);
+                } catch (InterruptedException ie) {
+                    Thread.currentThread().interrupt();
+                    break;
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private Set<String> getCurrentTerminalsWithCards(Object cardTerminals, Method listMethod, Object state) {
+        Set<String> result = new HashSet<>();
+        try {
+            List<?> terminals = (List<?>) listMethod.invoke(cardTerminals, state);
+            if (terminals != null) {
+                for (Object t : terminals) {
+                    Method getName = t.getClass().getMethod("getName");
+                    String name = (String) getName.invoke(t);
+                    result.add(name);
+                }
+            }
+        } catch (Throwable ignored) {
+        }
+        return result;
+    }
+
+    private void notifyInserted(String terminal) {
+        for (CardEventListener listener : listeners) {
+            try {
+                listener.onCardInserted(terminal);
+            } catch (Throwable t) {
+                logger.error("Erro no listener onCardInserted: {}", t.getMessage());
+            }
+        }
+    }
+
+    private void notifyRemoved(String terminal) {
+        for (CardEventListener listener : listeners) {
+            try {
+                listener.onCardRemoved(terminal);
+            } catch (Throwable t) {
+                logger.error("Erro no listener onCardRemoved: {}", t.getMessage());
+            }
+        }
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/validation/SignatureValidationService.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/validation/SignatureValidationService.java
new file mode 100644
index 0000000..f4fe8f6
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/validation/SignatureValidationService.java
@@ -0,0 +1,417 @@
+package br.com.cybercore.signer.core.validation;
+
+import br.com.cybercore.signer.core.crypto.X509CertificateUtils;
+import org.apache.pdfbox.Loader;
+import org.apache.pdfbox.pdmodel.PDDocument;
+import org.apache.pdfbox.pdmodel.interactive.digitalsignature.PDSignature;
+import org.bouncycastle.cert.X509CertificateHolder;
+import org.bouncycastle.cert.jcajce.JcaX509CertificateConverter;
+import org.bouncycastle.cms.CMSProcessableByteArray;
+import org.bouncycastle.cms.CMSSignedData;
+import org.bouncycastle.cms.SignerInformation;
+import org.bouncycastle.cms.SignerInformationStore;
+import org.bouncycastle.cms.jcajce.JcaSimpleSignerInfoVerifierBuilder;
+import org.bouncycastle.util.Store;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.w3c.dom.Document;
+import org.w3c.dom.NodeList;
+
+import javax.xml.crypto.dsig.XMLSignature;
+import javax.xml.crypto.dsig.XMLSignatureFactory;
+import javax.xml.crypto.dsig.dom.DOMValidateContext;
+import javax.xml.parsers.DocumentBuilderFactory;
+import java.io.ByteArrayInputStream;
+import java.security.cert.X509Certificate;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Date;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * Serviço especializado para Validação Criptográfica de Assinaturas Digitais.
+ * Suporta Assinaturas Destacadas (Detached CMS/PKCS#7) e Assinaturas Incorporadas
+ * (PAdES em PDF, CMS/P7M com conteúdo encapsulado e XMLDSig).
+ */
+public final class SignatureValidationService {
+
+    private static final Logger logger = LoggerFactory.getLogger(SignatureValidationService.class);
+    private static final JcaX509CertificateConverter CERT_CONVERTER = new JcaX509CertificateConverter();
+
+    /**
+     * Valida uma Assinatura Destacada (Detached).
+     * Requer os bytes do documento original e os bytes do arquivo de assinatura (.p7s / .sig).
+     */
+    public ValidationResult validateDetached(byte[] originalContent, byte[] signatureBytes, String docName) {
+        if (originalContent == null || originalContent.length == 0) {
+            return new ValidationResult(
+                    ValidationStatus.ERROR,
+                    ValidationType.DETACHED_CMS,
+                    "Documento original não informado ou vazio.",
+                    List.of(),
+                    null,
+                    docName
+            );
+        }
+
+        if (signatureBytes == null || signatureBytes.length == 0) {
+            return new ValidationResult(
+                    ValidationStatus.ERROR,
+                    ValidationType.DETACHED_CMS,
+                    "Arquivo de assinatura (.p7s) não informado ou vazio.",
+                    List.of(),
+                    null,
+                    docName
+            );
+        }
+
+        try {
+            CMSSignedData signedData = new CMSSignedData(new CMSProcessableByteArray(originalContent), signatureBytes);
+            return processCmsSignatures(signedData, ValidationType.DETACHED_CMS, null, docName);
+        } catch (Exception e) {
+            logger.warn("Erro ao processar assinatura destacada: {}", e.getMessage());
+            return new ValidationResult(
+                    ValidationStatus.INVALID,
+                    ValidationType.DETACHED_CMS,
+                    "Falha ao decodificar pacote CMS/PKCS#7: " + e.getMessage(),
+                    List.of(),
+                    null,
+                    docName
+            );
+        }
+    }
+
+    /**
+     * Valida uma Assinatura Incorporada / Anexada (Attached / Enveloped / Embedded).
+     * O arquivo assinado contém os dados e a assinatura juntos (PDF, P7M/CMS com dados, ou XML).
+     */
+    public ValidationResult validateAttached(byte[] signedFileBytes, String fileName) {
+        if (signedFileBytes == null || signedFileBytes.length == 0) {
+            return new ValidationResult(
+                    ValidationStatus.ERROR,
+                    ValidationType.UNKNOWN,
+                    "Arquivo assinado não informado ou vazio.",
+                    List.of(),
+                    null,
+                    fileName
+            );
+        }
+
+        String nameLower = (fileName != null) ? fileName.toLowerCase() : "";
+
+        // 1. Verificação se é documento PDF
+        if (nameLower.endsWith(".pdf") || isPdfBytes(signedFileBytes)) {
+            return validatePdf(signedFileBytes, fileName);
+        }
+
+        // 2. Verificação se é documento XML
+        if (nameLower.endsWith(".xml") || isXmlBytes(signedFileBytes)) {
+            return validateXml(signedFileBytes, fileName);
+        }
+
+        // 3. Verificação se é CMS incorporado (P7M / P7S com dados embutidos)
+        try {
+            CMSSignedData signedData = new CMSSignedData(signedFileBytes);
+            if (signedData.getSignedContent() != null) {
+                Object contentObj = signedData.getSignedContent().getContent();
+                byte[] extracted = null;
+                if (contentObj instanceof byte[] b) {
+                    extracted = b;
+                }
+                return processCmsSignatures(signedData, ValidationType.ATTACHED_CMS, extracted, fileName);
+            } else {
+                return new ValidationResult(
+                        ValidationStatus.WARNING,
+                        ValidationType.DETACHED_CMS,
+                        "O arquivo de assinatura selecionado é do tipo Destacado (Detached) e não contém o documento embutido. Selecione o Documento Original para validar.",
+                        List.of(),
+                        null,
+                        fileName
+                );
+            }
+        } catch (Exception e) {
+            logger.warn("Não foi possível decodificar como CMS: {}", e.getMessage());
+        }
+
+        return new ValidationResult(
+                ValidationStatus.ERROR,
+                ValidationType.UNKNOWN,
+                "Formato de arquivo assinado não reconhecido (esperado .pdf, .p7m, .p7s ou .xml).",
+                List.of(),
+                null,
+                fileName
+        );
+    }
+
+    /**
+     * Validação de assinaturas embutidas em documentos PDF (PAdES).
+     */
+    private ValidationResult validatePdf(byte[] pdfBytes, String fileName) {
+        try (PDDocument document = Loader.loadPDF(pdfBytes)) {
+            List<PDSignature> signatures = document.getSignatureDictionaries();
+
+            if (signatures == null || signatures.isEmpty()) {
+                return new ValidationResult(
+                        ValidationStatus.INVALID,
+                        ValidationType.PADES_PDF,
+                        "Nenhuma assinatura digital encontrada no documento PDF.",
+                        List.of(),
+                        null,
+                        fileName
+                );
+            }
+
+            List<ValidationSignerInfo> signerInfos = new ArrayList<>();
+            boolean allValid = true;
+
+            for (PDSignature sig : signatures) {
+                byte[] contents = sig.getContents(pdfBytes);
+                byte[] signedByteRange = sig.getSignedContent(pdfBytes);
+
+                if (contents == null || signedByteRange == null) {
+                    continue;
+                }
+
+                CMSSignedData cms = new CMSSignedData(new CMSProcessableByteArray(signedByteRange), contents);
+                ValidationResult cmsRes = processCmsSignatures(cms, ValidationType.PADES_PDF, null, fileName);
+
+                if (!cmsRes.isValid()) {
+                    allValid = false;
+                }
+
+                for (ValidationSignerInfo info : cmsRes.signers()) {
+                    String dateStr = (sig.getSignDate() != null)
+                            ? new SimpleDateFormat("dd/MM/yyyy HH:mm:ss").format(sig.getSignDate().getTime())
+                            : info.signingTime();
+
+                    signerInfos.add(new ValidationSignerInfo(
+                            (sig.getName() != null && !sig.getName().isBlank()) ? sig.getName() : info.signerName(),
+                            info.identifier(),
+                            info.issuer(),
+                            dateStr,
+                            info.digestValid(),
+                            info.signatureValid(),
+                            info.algorithm(),
+                            info.certificateSubject(),
+                            (sig.getReason() != null ? "Motivo: " + sig.getReason() : "Assinatura PAdES embutida no PDF")
+                    ));
+                }
+            }
+
+            ValidationStatus status = allValid ? ValidationStatus.VALID : ValidationStatus.INVALID;
+            String msg = allValid
+                    ? String.format("PDF assinado e íntegro com %d assinatura(s) digital(is) válida(s).", signerInfos.size())
+                    : "Assinatura(s) do PDF contêm falha de integridade ou autenticidade.";
+
+            return new ValidationResult(status, ValidationType.PADES_PDF, msg, signerInfos, null, fileName);
+
+        } catch (Exception e) {
+            logger.error("Falha ao validar documento PDF: {}", e.getMessage(), e);
+            return new ValidationResult(
+                    ValidationStatus.ERROR,
+                    ValidationType.PADES_PDF,
+                    "Erro ao analisar documento PDF: " + e.getMessage(),
+                    List.of(),
+                    null,
+                    fileName
+            );
+        }
+    }
+
+    /**
+     * Validação de assinaturas embutidas em documentos XML (XMLDSig).
+     */
+    private ValidationResult validateXml(byte[] xmlBytes, String fileName) {
+        try {
+            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
+            dbf.setNamespaceAware(true);
+            Document doc = dbf.newDocumentBuilder().parse(new ByteArrayInputStream(xmlBytes));
+
+            NodeList nl = doc.getElementsByTagNameNS(XMLSignature.XMLNS, "Signature");
+            if (nl.getLength() == 0) {
+                return new ValidationResult(
+                        ValidationStatus.INVALID,
+                        ValidationType.XML_DSIG,
+                        "Nenhum elemento <Signature> XMLDSig encontrado no documento.",
+                        List.of(),
+                        null,
+                        fileName
+                );
+            }
+
+            XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM");
+            List<ValidationSignerInfo> signers = new ArrayList<>();
+            boolean allValid = true;
+
+            for (int i = 0; i < nl.getLength(); i++) {
+                DOMValidateContext valContext = new DOMValidateContext(new KeyValueKeySelector(), nl.item(i));
+                XMLSignature signature = fac.unmarshalXMLSignature(valContext);
+                boolean coreValidity = signature.validate(valContext);
+
+                if (!coreValidity) {
+                    allValid = false;
+                }
+
+                signers.add(new ValidationSignerInfo(
+                        "Signatário XML #" + (i + 1),
+                        "",
+                        "Assinatura Enveloped XML",
+                        new SimpleDateFormat("dd/MM/yyyy HH:mm:ss").format(new Date()),
+                        coreValidity,
+                        coreValidity,
+                        signature.getSignedInfo().getSignatureMethod().getAlgorithm(),
+                        "XMLDSig Element",
+                        "Validade estrutural e criptográfica: " + (coreValidity ? "OK" : "FALHA")
+                ));
+            }
+
+            ValidationStatus status = allValid ? ValidationStatus.VALID : ValidationStatus.INVALID;
+            String msg = allValid ? "Documento XML assinado e válido conforme padrão W3C XML-DSig." : "Assinatura XML inválida ou com integridade violada.";
+            return new ValidationResult(status, ValidationType.XML_DSIG, msg, signers, null, fileName);
+
+        } catch (Exception e) {
+            logger.error("Erro ao validar XML: {}", e.getMessage(), e);
+            return new ValidationResult(
+                    ValidationStatus.ERROR,
+                    ValidationType.XML_DSIG,
+                    "Erro ao processar assinatura XML: " + e.getMessage(),
+                    List.of(),
+                    null,
+                    fileName
+            );
+        }
+    }
+
+    /**
+     * Processa e valida criptograficamente os signatários de um pacote CMSSignedData.
+     */
+    @SuppressWarnings("unchecked")
+    private ValidationResult processCmsSignatures(CMSSignedData signedData, ValidationType type,
+                                                  byte[] extractedContent, String docName) {
+        List<ValidationSignerInfo> signers = new ArrayList<>();
+        boolean allValid = true;
+
+        Store<X509CertificateHolder> certStore = signedData.getCertificates();
+        SignerInformationStore signerStore = signedData.getSignerInfos();
+
+        for (SignerInformation signer : signerStore.getSigners()) {
+            boolean sigValid = false;
+            String signerName = "Signatário Criptográfico";
+            String identifier = "";
+            String issuer = "Desconhecido";
+            String subject = "";
+            String signingTime = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss").format(new Date());
+
+            try {
+                Collection<X509CertificateHolder> matches = certStore.getMatches(signer.getSID());
+                if (!matches.isEmpty()) {
+                    X509CertificateHolder certHolder = matches.iterator().next();
+                    X509Certificate cert = CERT_CONVERTER.getCertificate(certHolder);
+
+                    subject = cert.getSubjectX500Principal().getName();
+                    issuer = cert.getIssuerX500Principal().getName();
+                    signerName = X509CertificateUtils.extractCommonName(subject);
+
+                    String cpf = X509CertificateUtils.extractCpf(cert, signerName);
+                    if (cpf != null) {
+                        identifier = "CPF: " + cpf;
+                    } else {
+                        String cnpj = X509CertificateUtils.extractCnpj(cert, signerName);
+                        if (cnpj != null) {
+                            identifier = "CNPJ: " + cnpj;
+                        }
+                    }
+
+                    // Validação Criptográfica real com a chave pública do certificado
+                    sigValid = signer.verify(new JcaSimpleSignerInfoVerifierBuilder().build(cert));
+                }
+            } catch (Exception e) {
+                logger.warn("Falha ao verificar assinatura de {}: {}", signerName, e.getMessage());
+                sigValid = false;
+            }
+
+            if (!sigValid) {
+                allValid = false;
+            }
+
+            signers.add(new ValidationSignerInfo(
+                    signerName,
+                    identifier,
+                    issuer,
+                    signingTime,
+                    sigValid,
+                    sigValid,
+                    signer.getDigestAlgOID(),
+                    subject,
+                    sigValid ? "Integridade e assinatura conferidas com sucesso." : "Falha na validação criptográfica do resumo ou chave."
+            ));
+        }
+
+        if (signers.isEmpty()) {
+            return new ValidationResult(
+                    ValidationStatus.INVALID,
+                    type,
+                    "Nenhum signatário encontrado no arquivo de assinatura.",
+                    List.of(),
+                    extractedContent,
+                    docName
+            );
+        }
+
+        ValidationStatus status = allValid ? ValidationStatus.VALID : ValidationStatus.INVALID;
+        String summary = allValid
+                ? "Assinatura criptográfica válida e integridade do documento confirmada."
+                : "Uma ou mais assinaturas criptográficas falharam na validação.";
+
+        return new ValidationResult(status, type, summary, signers, extractedContent, docName);
+    }
+
+    private static boolean isPdfBytes(byte[] bytes) {
+        if (bytes.length < 5) return false;
+        return bytes[0] == '%' && bytes[1] == 'P' && bytes[2] == 'D' && bytes[3] == 'F';
+    }
+
+    private static boolean isXmlBytes(byte[] bytes) {
+        if (bytes.length < 5) return false;
+        // Pula possíveis BOM
+        int offset = 0;
+        if (bytes.length > 3 && (bytes[0] == (byte) 0xEF && bytes[1] == (byte) 0xBB && bytes[2] == (byte) 0xBF)) {
+            offset = 3;
+        }
+        while (offset < bytes.length && Character.isWhitespace(bytes[offset])) {
+            offset++;
+        }
+        return offset < bytes.length && bytes[offset] == '<';
+    }
+
+    /**
+     * KeySelector simples para resolução de chave pública em assinaturas XML via KeyInfo.
+     */
+    private static class KeyValueKeySelector extends javax.xml.crypto.KeySelector {
+        @Override
+        public javax.xml.crypto.KeySelectorResult select(javax.xml.crypto.dsig.keyinfo.KeyInfo keyInfo,
+                                                         Purpose purpose,
+                                                         javax.xml.crypto.AlgorithmMethod method,
+                                                         javax.xml.crypto.XMLCryptoContext context) {
+            if (keyInfo == null) return () -> null;
+            for (Object info : keyInfo.getContent()) {
+                if (info instanceof javax.xml.crypto.dsig.keyinfo.KeyValue kv) {
+                    try {
+                        java.security.PublicKey pk = kv.getPublicKey();
+                        return () -> pk;
+                    } catch (Exception ignored) {
+                    }
+                } else if (info instanceof javax.xml.crypto.dsig.keyinfo.X509Data x509Data) {
+                    for (Object o : x509Data.getContent()) {
+                        if (o instanceof X509Certificate cert) {
+                            return cert::getPublicKey;
+                        }
+                    }
+                }
+            }
+            return () -> null;
+        }
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/validation/ValidationResult.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/validation/ValidationResult.java
new file mode 100644
index 0000000..003cc16
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/validation/ValidationResult.java
@@ -0,0 +1,19 @@
+package br.com.cybercore.signer.core.validation;
+
+import java.util.List;
+
+/**
+ * Resultado completo da validação de uma assinatura digital (incorporada ou destacada).
+ */
+public record ValidationResult(
+        ValidationStatus status,
+        ValidationType type,
+        String summaryMessage,
+        List<ValidationSignerInfo> signers,
+        byte[] extractedContent,
+        String documentName
+) {
+    public boolean isValid() {
+        return status == ValidationStatus.VALID;
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/validation/ValidationSignerInfo.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/validation/ValidationSignerInfo.java
new file mode 100644
index 0000000..4836c49
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/validation/ValidationSignerInfo.java
@@ -0,0 +1,20 @@
+package br.com.cybercore.signer.core.validation;
+
+/**
+ * Informações e resultado da validação criptográfica de um signatário individual.
+ */
+public record ValidationSignerInfo(
+        String signerName,
+        String identifier,
+        String issuer,
+        String signingTime,
+        boolean digestValid,
+        boolean signatureValid,
+        String algorithm,
+        String certificateSubject,
+        String details
+) {
+    public boolean isValid() {
+        return digestValid && signatureValid;
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/validation/ValidationStatus.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/validation/ValidationStatus.java
new file mode 100644
index 0000000..88bb35c
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/validation/ValidationStatus.java
@@ -0,0 +1,21 @@
+package br.com.cybercore.signer.core.validation;
+
+/**
+ * Status do resultado da validação criptográfica.
+ */
+public enum ValidationStatus {
+    VALID("VÁLIDA"),
+    INVALID("INVÁLIDA"),
+    WARNING("VÁLIDA COM RESSALVAS"),
+    ERROR("ERRO DE PROCESSAMENTO");
+
+    private final String description;
+
+    ValidationStatus(String description) {
+        this.description = description;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/validation/ValidationType.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/validation/ValidationType.java
new file mode 100644
index 0000000..8be237c
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/validation/ValidationType.java
@@ -0,0 +1,28 @@
+package br.com.cybercore.signer.core.validation;
+
+/**
+ * Tipos de assinatura digital suportados para validação.
+ */
+public enum ValidationType {
+    DETACHED_CMS("Assinatura Destacada (CAdES / PKCS#7)", false),
+    ATTACHED_CMS("Assinatura Incorporada (CMS / P7M)", true),
+    PADES_PDF("Assinatura Incorporada em PDF (PAdES)", true),
+    XML_DSIG("Assinatura Incorporada em XML (XML-DSig)", true),
+    UNKNOWN("Formato Desconhecido", false);
+
+    private final String description;
+    private final boolean isEmbedded;
+
+    ValidationType(String description, boolean isEmbedded) {
+        this.description = description;
+        this.isEmbedded = isEmbedded;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public boolean isEmbedded() {
+        return isEmbedded;
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/xml/XmlSignatureOptions.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/xml/XmlSignatureOptions.java
new file mode 100644
index 0000000..75424ef
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/xml/XmlSignatureOptions.java
@@ -0,0 +1,32 @@
+package br.com.cybercore.signer.core.xml;
+
+import java.util.Objects;
+
+/**
+ * Parâmetros de configuração para a operação de assinatura digital XMLDSig.
+ */
+public record XmlSignatureOptions(
+        String certificateId,
+        char[] pinOrPassword,
+        String targetElementTag,
+        String targetElementId,
+        String signatureAlgorithm
+) {
+
+    public static final String DEFAULT_ALGORITHM = "http://www.w3.org/2001/04/xmldsig-more#rsa-sha256";
+
+    public XmlSignatureOptions {
+        Objects.requireNonNull(certificateId, "ID do certificado não pode ser nulo.");
+        if (signatureAlgorithm == null || signatureAlgorithm.isBlank()) {
+            signatureAlgorithm = DEFAULT_ALGORITHM;
+        }
+    }
+
+    public static XmlSignatureOptions wholeDocument(String certificateId, char[] pinOrPassword) {
+        return new XmlSignatureOptions(certificateId, pinOrPassword, null, null, DEFAULT_ALGORITHM);
+    }
+
+    public static XmlSignatureOptions forElement(String certificateId, char[] pinOrPassword, String tag, String id) {
+        return new XmlSignatureOptions(certificateId, pinOrPassword, tag, id, DEFAULT_ALGORITHM);
+    }
+}
diff --git a/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/xml/XmlSigningService.java b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/xml/XmlSigningService.java
new file mode 100644
index 0000000..9699515
--- /dev/null
+++ b/modules/cybercore-core/src/main/java/br/com/cybercore/signer/core/xml/XmlSigningService.java
@@ -0,0 +1,290 @@
+package br.com.cybercore.signer.core.xml;
+
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.domain.SigningKeyMaterial;
+import br.com.cybercore.signer.core.protocol.CcspErrorCode;
+import br.com.cybercore.signer.core.provider.CertificateManager;
+import br.com.cybercore.signer.core.provider.CertificateProviderException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+
+import javax.xml.crypto.AlgorithmMethod;
+import javax.xml.crypto.KeySelector;
+import javax.xml.crypto.KeySelectorException;
+import javax.xml.crypto.KeySelectorResult;
+import javax.xml.crypto.XMLCryptoContext;
+import javax.xml.crypto.dsig.CanonicalizationMethod;
+import javax.xml.crypto.dsig.DigestMethod;
+import javax.xml.crypto.dsig.Reference;
+import javax.xml.crypto.dsig.SignatureMethod;
+import javax.xml.crypto.dsig.SignedInfo;
+import javax.xml.crypto.dsig.Transform;
+import javax.xml.crypto.dsig.XMLSignature;
+import javax.xml.crypto.dsig.XMLSignatureFactory;
+import javax.xml.crypto.dsig.dom.DOMSignContext;
+import javax.xml.crypto.dsig.dom.DOMValidateContext;
+import javax.xml.crypto.dsig.keyinfo.KeyInfo;
+import javax.xml.crypto.dsig.keyinfo.KeyInfoFactory;
+import javax.xml.crypto.dsig.keyinfo.X509Data;
+import javax.xml.crypto.dsig.spec.C14NMethodParameterSpec;
+import javax.xml.crypto.dsig.spec.TransformParameterSpec;
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.transform.OutputKeys;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.dom.DOMSource;
+import javax.xml.transform.stream.StreamResult;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.nio.file.Files;
+import java.security.Key;
+import java.security.PublicKey;
+import java.security.cert.X509Certificate;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+
+/**
+ * Serviço de alto nível para Assinatura Digital de Documentos XML segundo o padrão W3C XMLDSig e ICP-Brasil.
+ * Suporta assinatura enveloped de documento completo e assinatura de elementos por ID (NF-e, SPED, etc.).
+ * Utiliza o suporte de fábrica nativo e seguro da plataforma Java (javax.xml.crypto.dsig).
+ */
+public class XmlSigningService {
+
+    private static final Logger logger = LoggerFactory.getLogger(XmlSigningService.class);
+
+    private final CertificateManager certificateManager;
+
+    public XmlSigningService(CertificateManager certificateManager) {
+        this.certificateManager = Objects.requireNonNull(certificateManager, "CertificateManager não pode ser nulo.");
+    }
+
+    /**
+     * Assina digitalmente um arquivo XML e grava no arquivo de destino.
+     */
+    public void signXmlFile(File sourceXml, File targetXml, XmlSignatureOptions options) throws Exception {
+        Objects.requireNonNull(sourceXml, "Arquivo XML de origem não pode ser nulo.");
+        Objects.requireNonNull(targetXml, "Arquivo XML de destino não pode ser nulo.");
+        Objects.requireNonNull(options, "Opções de assinatura não podem ser nulas.");
+
+        byte[] inputBytes = Files.readAllBytes(sourceXml.toPath());
+        byte[] signedBytes = signXml(inputBytes, options);
+
+        if (targetXml.getParentFile() != null) {
+            targetXml.getParentFile().mkdirs();
+        }
+        try (FileOutputStream fos = new FileOutputStream(targetXml)) {
+            fos.write(signedBytes);
+        }
+        logger.info("XML assinado com sucesso e salvo em: {}", targetXml.getAbsolutePath());
+    }
+
+    /**
+     * Assina digitalmente o documento XML contido em bytes segundo as opções configuradas.
+     */
+    public byte[] signXml(byte[] xmlBytes, XmlSignatureOptions options) throws Exception {
+        Objects.requireNonNull(xmlBytes, "Bytes do XML não podem ser nulos.");
+        Objects.requireNonNull(options, "Opções de assinatura não podem ser nulas.");
+
+        // 1. Resolução do Certificado e Chave Privada
+        Optional<ManagedCertificate> certOpt = certificateManager.findById(options.certificateId());
+        if (certOpt.isEmpty()) {
+            certOpt = certificateManager.findByHint(options.certificateId());
+        }
+        if (certOpt.isEmpty()) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.CERTIFICATE_NOT_FOUND,
+                    "Certificado com ID '" + options.certificateId() + "' não encontrado."
+            );
+        }
+        ManagedCertificate cert = certOpt.get();
+
+        Optional<SigningKeyMaterial> keyMaterialOpt = certificateManager.getKeyMaterial(cert.id(), options.pinOrPassword());
+        if (keyMaterialOpt.isEmpty()) {
+            throw new CertificateProviderException(
+                    CcspErrorCode.PRIVATE_KEY_NOT_AVAILABLE,
+                    "Chave privada inacessível para o certificado '" + cert.alias() + "'."
+            );
+        }
+        SigningKeyMaterial keyMaterial = keyMaterialOpt.get();
+
+        logger.info("Iniciando assinatura XMLDSig com certificado '{}' [tipo={}]", cert.commonName(), cert.type());
+
+        // 2. Parse Seguro do XML (Prevenção rigorosa de XXE)
+        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
+        dbf.setNamespaceAware(true);
+        dbf.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
+        dbf.setFeature("http://xml.org/sax/features/external-general-entities", false);
+        dbf.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
+        dbf.setXIncludeAware(false);
+        dbf.setExpandEntityReferences(false);
+
+        DocumentBuilder db = dbf.newDocumentBuilder();
+        Document doc = db.parse(new ByteArrayInputStream(xmlBytes));
+
+        // 3. Configuração do XMLSignatureFactory
+        XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM");
+
+        // Transformações padrão: Enveloped + C14N
+        List<Transform> transforms = new ArrayList<>();
+        transforms.add(fac.newTransform(Transform.ENVELOPED, (TransformParameterSpec) null));
+        transforms.add(fac.newTransform(CanonicalizationMethod.INCLUSIVE, (TransformParameterSpec) null));
+
+        // Determinação da Referência e Ponto de Inserção
+        Reference ref;
+        Node insertionParent;
+
+        if (options.targetElementId() != null && !options.targetElementId().isBlank()) {
+            String elemId = options.targetElementId();
+            Element targetElement = findElementById(doc, elemId, options.targetElementTag());
+            if (targetElement == null) {
+                throw new IllegalArgumentException("Elemento XML com ID '" + elemId + "' não encontrado no documento.");
+            }
+            targetElement.setIdAttribute("Id", true);
+            ref = fac.newReference("#" + elemId, fac.newDigestMethod(DigestMethod.SHA256, null), transforms, null, null);
+            insertionParent = (targetElement.getParentNode() != null) ? targetElement.getParentNode() : doc.getDocumentElement();
+        } else if (options.targetElementTag() != null && !options.targetElementTag().isBlank()) {
+            NodeList list = doc.getElementsByTagName(options.targetElementTag());
+            if (list.getLength() == 0) {
+                list = doc.getElementsByTagNameNS("*", options.targetElementTag());
+            }
+            if (list.getLength() > 0 && list.item(0) instanceof Element elem && elem.hasAttribute("Id")) {
+                String idVal = elem.getAttribute("Id");
+                elem.setIdAttribute("Id", true);
+                ref = fac.newReference("#" + idVal, fac.newDigestMethod(DigestMethod.SHA256, null), transforms, null, null);
+                insertionParent = (elem.getParentNode() != null) ? elem.getParentNode() : doc.getDocumentElement();
+            } else {
+                ref = fac.newReference("", fac.newDigestMethod(DigestMethod.SHA256, null), transforms, null, null);
+                insertionParent = doc.getDocumentElement();
+            }
+        } else {
+            // Assinatura Enveloped do documento completo
+            ref = fac.newReference("", fac.newDigestMethod(DigestMethod.SHA256, null), transforms, null, null);
+            insertionParent = doc.getDocumentElement();
+        }
+
+        // 4. Montagem do SignedInfo
+        SignedInfo si = fac.newSignedInfo(
+                fac.newCanonicalizationMethod(CanonicalizationMethod.INCLUSIVE, (C14NMethodParameterSpec) null),
+                fac.newSignatureMethod(options.signatureAlgorithm(), null),
+                Collections.singletonList(ref)
+        );
+
+        // 5. Inclusão da Cadeia de Certificados no KeyInfo
+        KeyInfoFactory kif = fac.getKeyInfoFactory();
+        List<Object> x509Content = new ArrayList<>();
+        x509Content.add(keyMaterial.signingCertificate());
+        X509Data x509Data = kif.newX509Data(x509Content);
+        KeyInfo ki = kif.newKeyInfo(Collections.singletonList(x509Data));
+
+        // 6. Execução da Assinatura DOM
+        DOMSignContext dsc = new DOMSignContext(keyMaterial.privateKey(), insertionParent);
+        if (keyMaterial.jcaProvider() != null) {
+            dsc.setProperty("org.jcp.xml.dsig.internal.dom.SignatureProvider", keyMaterial.jcaProvider());
+        }
+
+        XMLSignature signature = fac.newXMLSignature(si, ki);
+        signature.sign(dsc);
+
+        // 7. Serialização do XML Assinado
+        TransformerFactory tf = TransformerFactory.newInstance();
+        Transformer trans = tf.newTransformer();
+        trans.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "no");
+        trans.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
+        trans.setOutputProperty(OutputKeys.INDENT, "no");
+
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        trans.transform(new DOMSource(doc), new StreamResult(baos));
+
+        logger.info("Assinatura XMLDSig gerada com sucesso. Tamanho: {} bytes", baos.size());
+        return baos.toByteArray();
+    }
+
+    /**
+     * Valida a integridade criptográfica de um documento XML assinado com XMLDSig.
+     */
+    public boolean validateXmlSignature(byte[] signedXmlBytes) throws Exception {
+        Objects.requireNonNull(signedXmlBytes, "Bytes do XML assinado não podem ser nulos.");
+
+        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
+        dbf.setNamespaceAware(true);
+        dbf.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
+
+        Document doc = dbf.newDocumentBuilder().parse(new ByteArrayInputStream(signedXmlBytes));
+
+        // Registra nós com atributo Id/id/ID para que o ResourceResolver do XMLDSig localize a referência
+        NodeList allElements = doc.getElementsByTagName("*");
+        for (int i = 0; i < allElements.getLength(); i++) {
+            if (allElements.item(i) instanceof Element e) {
+                if (e.hasAttribute("Id")) {
+                    e.setIdAttribute("Id", true);
+                } else if (e.hasAttribute("id")) {
+                    e.setIdAttribute("id", true);
+                } else if (e.hasAttribute("ID")) {
+                    e.setIdAttribute("ID", true);
+                }
+            }
+        }
+
+        NodeList nl = doc.getElementsByTagNameNS(XMLSignature.XMLNS, "Signature");
+        if (nl.getLength() == 0) {
+            nl = doc.getElementsByTagName("Signature");
+        }
+        if (nl.getLength() == 0) {
+            throw new IllegalArgumentException("Nenhum elemento <Signature> encontrado no XML para validação.");
+        }
+
+        Element sigElement = (Element) nl.item(0);
+
+        XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM");
+        DOMValidateContext valContext = new DOMValidateContext(new X509KeySelector(), sigElement);
+
+        XMLSignature signature = fac.unmarshalXMLSignature(valContext);
+        return signature.validate(valContext);
+    }
+
+    private static Element findElementById(Document doc, String id, String hintTag) {
+        if (hintTag != null && !hintTag.isBlank()) {
+            NodeList nl = doc.getElementsByTagName(hintTag);
+            for (int i = 0; i < nl.getLength(); i++) {
+                if (nl.item(i) instanceof Element e && id.equals(e.getAttribute("Id"))) {
+                    return e;
+                }
+            }
+        }
+        return doc.getElementById(id);
+    }
+
+    /**
+     * Seletor de chave pública baseado no certificado X.509 embutido no KeyInfo.
+     */
+    private static class X509KeySelector extends KeySelector {
+        @Override
+        public KeySelectorResult select(KeyInfo keyInfo, KeySelector.Purpose purpose,
+                                        AlgorithmMethod method, XMLCryptoContext context) throws KeySelectorException {
+            if (keyInfo == null) {
+                throw new KeySelectorException("Elemento KeyInfo ausente na assinatura XML.");
+            }
+            for (Object info : keyInfo.getContent()) {
+                if (info instanceof X509Data x509Data) {
+                    for (Object o : x509Data.getContent()) {
+                        if (o instanceof X509Certificate cert) {
+                            PublicKey pk = cert.getPublicKey();
+                            return () -> pk;
+                        }
+                    }
+                }
+            }
+            throw new KeySelectorException("Nenhuma chave pública X.509 encontrada no KeyInfo da assinatura.");
+        }
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/config/AgentConfigurationServiceTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/config/AgentConfigurationServiceTest.java
new file mode 100644
index 0000000..3a8c986
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/config/AgentConfigurationServiceTest.java
@@ -0,0 +1,47 @@
+package br.com.cybercore.signer.core.config;
+
+import br.com.cybercore.signer.core.pdf.seal.CpfDisplayMode;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+import java.nio.file.Path;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@DisplayName("Testes de Configurações do Agente (AgentConfigurationService)")
+class AgentConfigurationServiceTest {
+
+    @TempDir
+    Path tempDir;
+
+    @Test
+    @DisplayName("Deve salvar e recuperar configurações personalizadas do agente")
+    void shouldSaveAndLoadConfigurations() {
+        Path configFile = tempDir.resolve("config.json");
+        AgentConfigurationService service = new AgentConfigurationService(configFile);
+
+        AgentConfiguration customConfig = new AgentConfiguration(
+                false,
+                true,
+                true,
+                "cybercore-modern",
+                CpfDisplayMode.MASKED,
+                false,
+                18420
+        );
+
+        service.updateConfig(customConfig);
+
+        // Novo serviço lendo o mesmo arquivo
+        AgentConfigurationService reloadedService = new AgentConfigurationService(configFile);
+        AgentConfiguration loaded = reloadedService.getConfig();
+
+        assertThat(loaded.requireConfirmation()).isFalse();
+        assertThat(loaded.alwaysPromptPin()).isTrue();
+        assertThat(loaded.autoStart()).isTrue();
+        assertThat(loaded.defaultSealThemeId()).isEqualTo("cybercore-modern");
+        assertThat(loaded.defaultCpfDisplayMode()).isEqualTo(CpfDisplayMode.MASKED);
+        assertThat(loaded.defaultIncludeDateTime()).isFalse();
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/crypto/DigestAlgorithmTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/crypto/DigestAlgorithmTest.java
new file mode 100644
index 0000000..9b49317
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/crypto/DigestAlgorithmTest.java
@@ -0,0 +1,45 @@
+package br.com.cybercore.signer.core.crypto;
+
+import br.com.cybercore.signer.core.protocol.CcspErrorCode;
+import br.com.cybercore.signer.core.provider.CertificateProviderException;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+class DigestAlgorithmTest {
+
+    @Test
+    @DisplayName("Deve identificar algoritmos suportados pelo nome JCA")
+    void shouldFindSupportedAlgorithm() throws Exception {
+        DigestAlgorithm alg = DigestAlgorithm.fromName("SHA256withRSA");
+        assertThat(alg).isEqualTo(DigestAlgorithm.SHA256_WITH_RSA);
+        assertThat(alg.getExpectedDigestLengthBytes()).isEqualTo(32);
+
+        DigestAlgorithm algEc = DigestAlgorithm.fromName("SHA384withECDSA");
+        assertThat(algEc).isEqualTo(DigestAlgorithm.SHA384_WITH_ECDSA);
+        assertThat(algEc.getExpectedDigestLengthBytes()).isEqualTo(48);
+    }
+
+    @Test
+    @DisplayName("Deve lançar CertificateProviderException para algoritmo desconhecido")
+    void shouldFailOnUnknownAlgorithm() {
+        assertThatThrownBy(() -> DigestAlgorithm.fromName("MD5withRSA"))
+                .isInstanceOf(CertificateProviderException.class)
+                .hasFieldOrPropertyWithValue("errorCode", CcspErrorCode.UNSUPPORTED_ALGORITHM);
+    }
+
+    @Test
+    @DisplayName("Deve validar comprimento correto do hash digest")
+    void shouldValidateDigestLength() throws Exception {
+        DigestAlgorithm alg = DigestAlgorithm.SHA256_WITH_RSA;
+        byte[] validSha256 = new byte[32];
+        alg.validateDigestLength(validSha256);
+
+        byte[] invalidLength = new byte[16];
+        assertThatThrownBy(() -> alg.validateDigestLength(invalidLength))
+                .isInstanceOf(CertificateProviderException.class)
+                .hasFieldOrPropertyWithValue("errorCode", CcspErrorCode.SIGNATURE_FAILED);
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/crypto/SigningServiceTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/crypto/SigningServiceTest.java
new file mode 100644
index 0000000..4f46c5a
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/crypto/SigningServiceTest.java
@@ -0,0 +1,147 @@
+package br.com.cybercore.signer.core.crypto;
+
+import br.com.cybercore.signer.core.domain.CertificateStatus;
+import br.com.cybercore.signer.core.domain.CertificateType;
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.domain.SigningContext;
+import br.com.cybercore.signer.core.domain.SigningResult;
+import br.com.cybercore.signer.core.protocol.CcspErrorCode;
+import br.com.cybercore.signer.core.provider.CertificateManager;
+import br.com.cybercore.signer.core.provider.CertificateProvider;
+import br.com.cybercore.signer.core.provider.CertificateProviderException;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+class SigningServiceTest {
+
+    private CertificateManager certificateManager;
+    private CertificateProvider mockProvider;
+    private SigningService signingService;
+    private ManagedCertificate validCert;
+
+    @BeforeEach
+    void setUp() throws Exception {
+        certificateManager = new CertificateManager();
+        mockProvider = mock(CertificateProvider.class);
+        when(mockProvider.getProviderId()).thenReturn("provider-mock");
+        when(mockProvider.isAvailable()).thenReturn(true);
+
+        validCert = new ManagedCertificate(
+                "cert-valid", "João da Silva", CertificateType.A3, CertificateStatus.AVAILABLE,
+                "CN=João da Silva:12345678909, O=ICP-Brasil, C=BR", "CN=AC Certisign, C=BR",
+                "ABC1234", "sha1_val", "sha256_val",
+                Instant.now().minus(30, ChronoUnit.DAYS), Instant.now().plus(300, ChronoUnit.DAYS),
+                "RSA", 2048, "João da Silva", "12345678909", null, "provider-mock", "Token USB"
+        );
+
+        when(mockProvider.listCertificates()).thenReturn(List.of(validCert));
+        certificateManager.registerProvider(mockProvider);
+        certificateManager.discoverCertificates();
+
+        signingService = new SigningService(certificateManager);
+    }
+
+    @Test
+    @DisplayName("Deve executar assinatura com sucesso delegando ao provider")
+    void shouldSignSuccessfully() throws Exception {
+        byte[] digest = new byte[32]; // SHA-256 digest
+        SigningContext context = new SigningContext(
+                "req-uuid-1", "app-erp", digest, "SHA256withRSA", "cert-valid", Instant.now()
+        );
+
+        SigningResult expectedResult = new SigningResult(
+                "req-uuid-1", new byte[]{1, 2, 3, 4}, "certBase64",
+                List.of("certBase64"), "SHA256withRSA", Instant.now()
+        );
+
+        when(mockProvider.sign(any())).thenReturn(expectedResult);
+
+        SigningResult actual = signingService.sign(context);
+
+        assertThat(actual).isNotNull();
+        assertThat(actual.requestId()).isEqualTo("req-uuid-1");
+        assertThat(actual.signatureBytes()).isEqualTo(new byte[]{1, 2, 3, 4});
+    }
+
+    @Test
+    @DisplayName("Deve rejeitar requisição sem request_id")
+    void shouldRejectMissingRequestId() {
+        byte[] digest = new byte[32];
+
+        assertThatThrownBy(() -> new SigningContext(
+                null, "app-erp", digest, "SHA256withRSA", "cert-valid", Instant.now()
+        )).isInstanceOf(NullPointerException.class);
+    }
+
+    @Test
+    @DisplayName("Deve falhar ao tentar assinar com algoritmo não suportado")
+    void shouldFailOnUnsupportedAlgorithm() {
+        byte[] digest = new byte[32];
+        SigningContext context = new SigningContext(
+                "req-2", "app-erp", digest, "MD5withRSA", "cert-valid", Instant.now()
+        );
+
+        assertThatThrownBy(() -> signingService.sign(context))
+                .isInstanceOf(CertificateProviderException.class)
+                .hasFieldOrPropertyWithValue("errorCode", CcspErrorCode.UNSUPPORTED_ALGORITHM);
+    }
+
+    @Test
+    @DisplayName("Deve falhar se o certificado estiver expirado")
+    void shouldFailOnExpiredCertificate() throws Exception {
+        ManagedCertificate expiredCert = new ManagedCertificate(
+                "cert-exp", "Maria Expirada", CertificateType.A1, CertificateStatus.EXPIRED,
+                "CN=Maria Expirada, C=BR", "CN=AC Raiz, C=BR",
+                "EXP123", "sha1_exp", "sha256_exp",
+                Instant.now().minus(300, ChronoUnit.DAYS), Instant.now().minus(10, ChronoUnit.DAYS),
+                "RSA", 2048, "Maria Expirada", null, null, "provider-mock", null
+        );
+
+        when(mockProvider.listCertificates()).thenReturn(List.of(expiredCert));
+        certificateManager.discoverCertificates();
+
+        byte[] digest = new byte[32];
+        SigningContext context = new SigningContext(
+                "req-3", "app-erp", digest, "SHA256withRSA", "cert-exp", Instant.now()
+        );
+
+        assertThatThrownBy(() -> signingService.sign(context))
+                .isInstanceOf(CertificateProviderException.class)
+                .hasFieldOrPropertyWithValue("errorCode", CcspErrorCode.CERTIFICATE_EXPIRED);
+    }
+
+    @Test
+    @DisplayName("Deve falhar se o certificado não possuir chave privada")
+    void shouldFailWhenPrivateKeyNotAvailable() throws Exception {
+        ManagedCertificate noKeyCert = new ManagedCertificate(
+                "cert-nokey", "Certificado Público", CertificateType.A1, CertificateStatus.NO_PRIVATE_KEY,
+                "CN=Certificado Público, C=BR", "CN=AC Raiz, C=BR",
+                "NOKEY123", "sha1_nokey", "sha256_nokey",
+                Instant.now().minus(10, ChronoUnit.DAYS), Instant.now().plus(300, ChronoUnit.DAYS),
+                "RSA", 2048, "Certificado Público", null, null, "provider-mock", null
+        );
+
+        when(mockProvider.listCertificates()).thenReturn(List.of(noKeyCert));
+        certificateManager.discoverCertificates();
+
+        byte[] digest = new byte[32];
+        SigningContext context = new SigningContext(
+                "req-4", "app-erp", digest, "SHA256withRSA", "cert-nokey", Instant.now()
+        );
+
+        assertThatThrownBy(() -> signingService.sign(context))
+                .isInstanceOf(CertificateProviderException.class)
+                .hasFieldOrPropertyWithValue("errorCode", CcspErrorCode.PRIVATE_KEY_NOT_AVAILABLE);
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/diagnostics/DiagnosticServiceTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/diagnostics/DiagnosticServiceTest.java
new file mode 100644
index 0000000..418b012
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/diagnostics/DiagnosticServiceTest.java
@@ -0,0 +1,22 @@
+package br.com.cybercore.signer.core.diagnostics;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class DiagnosticServiceTest {
+
+    @Test
+    @DisplayName("Deve gerar relatório de diagnóstico com sucesso e validar crypto engine")
+    void shouldGenerateDiagnosticReport() {
+        DiagnosticService service = new DiagnosticService();
+        DiagnosticReport report = service.runDiagnostic();
+
+        assertThat(report).isNotNull();
+        assertThat(report.cryptoEngineOk()).isTrue();
+        assertThat(report.javaVersion()).isNotBlank();
+        assertThat(report.registeredSecurityProviders()).isNotEmpty();
+        assertThat(report.additionalDetails()).containsKey("VirtualThreadsSupported");
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/pdf/PdfSigningServiceTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/pdf/PdfSigningServiceTest.java
new file mode 100644
index 0000000..6c061fc
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/pdf/PdfSigningServiceTest.java
@@ -0,0 +1,218 @@
+package br.com.cybercore.signer.core.pdf;
+
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealTheme;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealThemeRegistry;
+import br.com.cybercore.signer.core.provider.CertificateManager;
+import br.com.cybercore.signer.core.provider.Pkcs12CertificateProvider;
+import org.apache.pdfbox.Loader;
+import org.apache.pdfbox.pdmodel.PDDocument;
+import org.apache.pdfbox.pdmodel.PDPage;
+import org.apache.pdfbox.pdmodel.PDPageContentStream;
+import org.apache.pdfbox.pdmodel.font.PDType1Font;
+import org.apache.pdfbox.pdmodel.font.Standard14Fonts;
+import org.apache.pdfbox.pdmodel.interactive.digitalsignature.PDSignature;
+import org.bouncycastle.asn1.x500.X500Name;
+import org.bouncycastle.cert.X509v3CertificateBuilder;
+import org.bouncycastle.cert.jcajce.JcaX509CertificateConverter;
+import org.bouncycastle.cert.jcajce.JcaX509v3CertificateBuilder;
+import org.bouncycastle.operator.ContentSigner;
+import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.io.ByteArrayOutputStream;
+import java.math.BigInteger;
+import java.security.KeyPair;
+import java.security.KeyPairGenerator;
+import java.security.KeyStore;
+import java.security.cert.Certificate;
+import java.security.cert.X509Certificate;
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+import java.util.Date;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class PdfSigningServiceTest {
+
+    private CertificateManager certificateManager;
+    private PdfSigningService pdfSigningService;
+    private String testCertId;
+
+    @BeforeEach
+    void setUp() throws Exception {
+        certificateManager = new CertificateManager();
+
+        // Gera par de chaves e certificado X.509 em memória
+        KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
+        kpg.initialize(2048);
+        KeyPair kp = kpg.generateKeyPair();
+
+        long now = System.currentTimeMillis();
+        Date notBefore = new Date(now - 100000);
+        Date notAfter = new Date(now + 365L * 24 * 3600 * 1000);
+
+        X500Name subject = new X500Name("CN=Joao da Silva:12345678900, O=CyberCore Testes, C=BR");
+        X509v3CertificateBuilder certBuilder = new JcaX509v3CertificateBuilder(
+                subject,
+                BigInteger.valueOf(System.currentTimeMillis()),
+                notBefore,
+                notAfter,
+                subject,
+                kp.getPublic()
+        );
+
+        ContentSigner signer = new JcaContentSignerBuilder("SHA256withRSA").build(kp.getPrivate());
+        X509Certificate cert = new JcaX509CertificateConverter().getCertificate(certBuilder.build(signer));
+
+        // Cria KeyStore PKCS12 em memória
+        KeyStore ks = KeyStore.getInstance("PKCS12");
+        ks.load(null, null);
+        char[] pwd = "password123".toCharArray();
+        ks.setKeyEntry("test-cert", kp.getPrivate(), pwd, new Certificate[]{cert});
+
+        Pkcs12CertificateProvider provider = new Pkcs12CertificateProvider("test-provider", "Provedor de Teste");
+        provider.setKeyStore(ks, pwd);
+        certificateManager.registerProvider(provider);
+
+        List<ManagedCertificate> list = certificateManager.discoverCertificates();
+        assertThat(list).isNotEmpty();
+        this.testCertId = list.get(0).id();
+
+        this.pdfSigningService = new PdfSigningService(certificateManager);
+    }
+
+    private byte[] createSamplePdf() throws Exception {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        try (PDDocument doc = new PDDocument()) {
+            PDPage page = new PDPage();
+            doc.addPage(page);
+
+            try (PDPageContentStream cs = new PDPageContentStream(doc, page)) {
+                cs.beginText();
+                cs.setFont(new PDType1Font(Standard14Fonts.FontName.HELVETICA_BOLD), 14);
+                cs.newLineAtOffset(100, 700);
+                cs.showText("Documento de Contrato de Teste - CyberCore Signer");
+                cs.endText();
+            }
+            doc.save(baos);
+        }
+        return baos.toByteArray();
+    }
+
+    @Test
+    @DisplayName("Deve assinar documento PDF aplicando selo visual com o tema ICP-Brasil")
+    void shouldSignPdfWithIcpBrasilVisualSeal() throws Exception {
+        byte[] originalPdf = createSamplePdf();
+
+        PdfSealTheme theme = PdfSealThemeRegistry.findById("icp-brasil").orElseThrow();
+        PdfSignatureOptions options = PdfSignatureOptions.builder(testCertId)
+                .sealTheme(theme)
+                .visibleSeal(true)
+                .position(PdfSealPosition.BOTTOM_RIGHT)
+                .pageChoice(PdfSealPageChoice.LAST_PAGE)
+                .reason("Aprovação Contratual")
+                .location("Brasília, DF")
+                .build();
+
+        byte[] signedPdf = pdfSigningService.signPdf(originalPdf, options);
+
+        assertThat(signedPdf).isNotNull();
+        assertThat(signedPdf.length).isGreaterThan(originalPdf.length);
+
+        // Valida se o PDF possui a assinatura PDSignature incorporada
+        try (PDDocument signedDoc = Loader.loadPDF(signedPdf)) {
+            List<PDSignature> signatures = signedDoc.getSignatureDictionaries();
+            assertThat(signatures).hasSize(1);
+
+            PDSignature sig = signatures.get(0);
+            assertThat(sig.getName()).contains("Joao da Silva");
+            assertThat(sig.getReason()).isEqualTo("Aprovação Contratual");
+            assertThat(sig.getLocation()).isEqualTo("Brasília, DF");
+        }
+    }
+
+    @Test
+    @DisplayName("Deve suportar todos os temas de selos visuais em SVG (CyberCore, Minimalista, Gov.br)")
+    void shouldSupportAllVisualSealThemes() throws Exception {
+        byte[] originalPdf = createSamplePdf();
+
+        for (PdfSealTheme theme : PdfSealThemeRegistry.listThemes()) {
+            PdfSignatureOptions options = PdfSignatureOptions.builder(testCertId)
+                    .sealTheme(theme)
+                    .visibleSeal(true)
+                    .position(PdfSealPosition.BOTTOM_LEFT)
+                    .build();
+
+            byte[] signed = pdfSigningService.signPdf(originalPdf, options);
+            assertThat(signed).isNotNull();
+
+            try (PDDocument doc = Loader.loadPDF(signed)) {
+                assertThat(doc.getSignatureDictionaries()).hasSize(1);
+            }
+        }
+    }
+
+    @Test
+    @DisplayName("Deve assinar PDF no modo invisível (sem selo gráfico)")
+    void shouldSignPdfInvisibleWithoutSeal() throws Exception {
+        byte[] originalPdf = createSamplePdf();
+
+        PdfSignatureOptions options = PdfSignatureOptions.builder(testCertId)
+                .visibleSeal(false)
+                .build();
+
+        byte[] signedPdf = pdfSigningService.signPdf(originalPdf, options);
+
+        try (PDDocument doc = Loader.loadPDF(signedPdf)) {
+            assertThat(doc.getSignatureDictionaries()).hasSize(1);
+        }
+    }
+
+    @Test
+    @DisplayName("Deve assinar PDF com coordenadas customizadas e página específica")
+    void shouldSignPdfWithCustomCoordinatesAndPage() throws Exception {
+        byte[] originalPdf = createSamplePdf();
+
+        PdfSignatureOptions options = PdfSignatureOptions.builder(testCertId)
+                .visibleSeal(true)
+                .customPosition(120.5f, 250.0f, 1)
+                .reason("Assinatura em local personalizado")
+                .location("São Paulo, SP")
+                .build();
+
+        assertThat(options.position()).isEqualTo(PdfSealPosition.CUSTOM);
+        assertThat(options.customX()).isEqualTo(120.5f);
+        assertThat(options.customY()).isEqualTo(250.0f);
+        assertThat(options.targetPageNumber()).isEqualTo(1);
+
+        byte[] signedPdf = pdfSigningService.signPdf(originalPdf, options);
+        assertThat(signedPdf).isNotNull();
+
+        try (PDDocument doc = Loader.loadPDF(signedPdf)) {
+            assertThat(doc.getSignatureDictionaries()).hasSize(1);
+            PDSignature sig = doc.getSignatureDictionaries().get(0);
+            assertThat(sig.getReason()).isEqualTo("Assinatura em local personalizado");
+        }
+    }
+
+    @Test
+    @DisplayName("Deve contar páginas e renderizar imagem da página do PDF")
+    void shouldCountPagesAndRenderPageImage() throws Exception {
+        byte[] originalPdf = createSamplePdf();
+
+        int count = PdfSigningService.getPageCount(originalPdf);
+        assertThat(count).isEqualTo(1);
+
+        java.awt.image.BufferedImage img = PdfSigningService.renderPageImage(originalPdf, 0, 72f);
+        assertThat(img).isNotNull();
+        assertThat(img.getWidth()).isGreaterThan(100);
+        assertThat(img.getHeight()).isGreaterThan(100);
+
+        byte[] pngBytes = PdfSigningService.renderPagePngBytes(originalPdf, 0, 72f);
+        assertThat(pngBytes).isNotEmpty();
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/pdf/seal/CpfDisplayModeTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/pdf/seal/CpfDisplayModeTest.java
new file mode 100644
index 0000000..9787008
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/pdf/seal/CpfDisplayModeTest.java
@@ -0,0 +1,31 @@
+package br.com.cybercore.signer.core.pdf.seal;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@DisplayName("Testes do Modo de Exibição de CPF nos Selos (CpfDisplayMode)")
+class CpfDisplayModeTest {
+
+    @Test
+    @DisplayName("Deve formatar CPF completo com pontuação padrão")
+    void shouldFormatFullCpf() {
+        String formatted = CpfDisplayMode.FULL.formatCpf("12345678900");
+        assertThat(formatted).isEqualTo("123.456.789-00");
+    }
+
+    @Test
+    @DisplayName("Deve formatar CPF mascarado protegendo dados sensíveis")
+    void shouldFormatMaskedCpf() {
+        String formatted = CpfDisplayMode.MASKED.formatCpf("12345678900");
+        assertThat(formatted).isEqualTo("***.456.789-**");
+    }
+
+    @Test
+    @DisplayName("Deve omitir CPF quando o modo for NONE")
+    void shouldOmitCpfWhenNone() {
+        String formatted = CpfDisplayMode.NONE.formatCpf("12345678900");
+        assertThat(formatted).isEmpty();
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/pdf/seal/CustomSealStorageTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/pdf/seal/CustomSealStorageTest.java
new file mode 100644
index 0000000..09017ee
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/pdf/seal/CustomSealStorageTest.java
@@ -0,0 +1,137 @@
+package br.com.cybercore.signer.core.pdf.seal;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+import java.io.IOException;
+import java.nio.file.Path;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@DisplayName("Testes de Armazenamento e Instalação de Selos Personalizados (CustomSealStorage)")
+class CustomSealStorageTest {
+
+    @TempDir
+    Path tempDir;
+
+    @Test
+    @DisplayName("Deve salvar, listar e excluir selos personalizados com sucesso")
+    void shouldSaveListAndDeleteCustomSeal() throws IOException {
+        CustomSealStorage storage = new CustomSealStorage(tempDir);
+
+        PdfSealTheme customTheme = new PdfSealTheme(
+                "selo-meu-escritorio",
+                "Meu Escritório de Advocacia",
+                "Selo personalizado com brasão dourado e fundo escuro",
+                320,
+                82,
+                "#b45309",
+                "#d97706",
+                "#ffffff",
+                "#fde68a",
+                "#1f2937",
+                null,
+                "ADVOCACIA SILVA • ASSINADO DIGITALMENTE",
+                "Validade jurídica plena conforme MP nº 2.200-2/2001",
+                "notary",
+                CpfDisplayMode.MASKED,
+                true,
+                true
+        );
+
+        storage.saveSeal(customTheme);
+
+        List<PdfSealTheme> seals = storage.loadAllCustomSeals();
+        assertThat(seals).hasSize(1);
+
+        PdfSealTheme loaded = seals.get(0);
+        assertThat(loaded.id()).isEqualTo("selo-meu-escritorio");
+        assertThat(loaded.name()).isEqualTo("Meu Escritório de Advocacia");
+        assertThat(loaded.customHeader()).isEqualTo("ADVOCACIA SILVA • ASSINADO DIGITALMENTE");
+        assertThat(loaded.defaultCpfMode()).isEqualTo(CpfDisplayMode.MASKED);
+        assertThat(loaded.isCustom()).isTrue();
+
+        boolean deleted = storage.deleteSeal("selo-meu-escritorio");
+        assertThat(deleted).isTrue();
+        assertThat(storage.loadAllCustomSeals()).isEmpty();
+    }
+
+    @Test
+    @DisplayName("Deve salvar e carregar selo customizado com logotipo em imagem Base64")
+    void shouldSaveAndLoadCustomSealWithCustomLogo() throws IOException {
+        CustomSealStorage storage = new CustomSealStorage(tempDir);
+
+        String sampleBase64 = "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8BQDwAEhQGAhKmMIQAAAABJRU5ErkJggg==";
+
+        PdfSealTheme customWithLogo = new PdfSealTheme(
+                "selo-logo-propria",
+                "Selo com Logo Própria",
+                "Selo para empresa com logotipo PNG em Base64",
+                320,
+                82,
+                "#1e3a8a",
+                "#3b82f6",
+                "#ffffff",
+                "#93c5fd",
+                "#172554",
+                null,
+                "MEU ESCRITÓRIO • ASSINADO DIGITALMENTE",
+                "Validade jurídica plena conforme MP nº 2.200-2/2001",
+                "shield",
+                CpfDisplayMode.FULL,
+                true,
+                true,
+                sampleBase64
+        );
+
+        storage.saveSeal(customWithLogo);
+
+        List<PdfSealTheme> seals = storage.loadAllCustomSeals();
+        assertThat(seals).hasSize(1);
+        PdfSealTheme loaded = seals.get(0);
+        assertThat(loaded.id()).isEqualTo("selo-logo-propria");
+        assertThat(loaded.customLogoBase64()).isEqualTo(sampleBase64);
+        assertThat(loaded.isCustom()).isTrue();
+    }
+
+    @Test
+    @DisplayName("Deve salvar e carregar selo customizado com campos customizados (ex: Matrícula / Cargo / OAB)")
+    void shouldSaveAndLoadCustomSealWithCustomFields() throws IOException {
+        CustomSealStorage storage = new CustomSealStorage(tempDir);
+
+        PdfSealTheme customWithFields = new PdfSealTheme(
+                "selo-servidor-publico",
+                "Selo Servidor Público",
+                "Selo para auditores e servidores com matrícula funcional",
+                320,
+                82,
+                "#065f46",
+                "#059669",
+                "#ffffff",
+                "#a7f3d0",
+                "#064e3b",
+                null,
+                "TRIBUNAL DE CONTAS • AUDITORIA FISCAL",
+                "Autenticidade ICP-Brasil conferida",
+                "shield",
+                CpfDisplayMode.MASKED,
+                true,
+                true,
+                null,
+                "Matrícula",
+                "984210-AUD"
+        );
+
+        storage.saveSeal(customWithFields);
+
+        List<PdfSealTheme> seals = storage.loadAllCustomSeals();
+        assertThat(seals).hasSize(1);
+        PdfSealTheme loaded = seals.get(0);
+        assertThat(loaded.id()).isEqualTo("selo-servidor-publico");
+        assertThat(loaded.customFieldLabel()).isEqualTo("Matrícula");
+        assertThat(loaded.customFieldValue()).isEqualTo("984210-AUD");
+        assertThat(loaded.formatCustomField()).isEqualTo("Matrícula: 984210-AUD");
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/pdf/seal/PdfSealRendererTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/pdf/seal/PdfSealRendererTest.java
new file mode 100644
index 0000000..f9233f1
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/pdf/seal/PdfSealRendererTest.java
@@ -0,0 +1,140 @@
+package br.com.cybercore.signer.core.pdf.seal;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.awt.image.BufferedImage;
+import java.io.IOException;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@DisplayName("Testes de Renderização de Selos Visuais (PdfSealRenderer)")
+class PdfSealRendererTest {
+
+    @Test
+    @DisplayName("Deve renderizar selo visual em alta resolução com sucesso")
+    void shouldRenderSealImageInHighResolution() throws IOException {
+        PdfSealTheme theme = PdfSealThemeRegistry.getDefaultTheme();
+        PdfSealData data = new PdfSealData(
+                "Dr. Carlos Alberto de Oliveira Santos Júnior",
+                "CPF: 12345678900",
+                null,
+                "AC CyberCore JUS v5",
+                "8A7F4B2C91D0E3F5",
+                "Assinatura Digital",
+                "São Paulo, SP",
+                CpfDisplayMode.MASKED,
+                true
+        );
+
+        BufferedImage img = PdfSealRenderer.renderToImage(theme, data);
+        assertThat(img).isNotNull();
+        // Escala 2x: 320 * 2 = 640, 82 * 2 = 164
+        assertThat(img.getWidth()).isEqualTo(640);
+        assertThat(img.getHeight()).isEqualTo(164);
+
+        byte[] pngBytes = PdfSealRenderer.renderToPngBytes(theme, data);
+        assertThat(pngBytes).isNotEmpty();
+        // Header PNG: 0x89 0x50 0x4E 0x47
+        assertThat(pngBytes[0]).isEqualTo((byte) 0x89);
+        assertThat(pngBytes[1]).isEqualTo((byte) 0x50);
+        assertThat(pngBytes[2]).isEqualTo((byte) 0x4E);
+        assertThat(pngBytes[3]).isEqualTo((byte) 0x47);
+    }
+
+    @Test
+    @DisplayName("Deve renderizar selo com logotipo personalizado em Base64")
+    void shouldRenderSealWithCustomLogoBase64() throws IOException {
+        // Pixel PNG 1x1 em Base64
+        String sampleBase64 = "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8BQDwAEhQGAhKmMIQAAAABJRU5ErkJggg==";
+
+        PdfSealTheme themeWithLogo = new PdfSealTheme(
+                "custom-seal",
+                "Selo com Logo Própria",
+                "Descrição do selo",
+                320,
+                82,
+                "#0d47a1",
+                "#0284c7",
+                "#ffffff",
+                "#cbd5e1",
+                "#0f172a",
+                null,
+                "MEU ESCRITÓRIO • ASSINADO DIGITALMENTE",
+                "Validade jurídica plena conforme MP nº 2.200-2/2001",
+                "shield",
+                CpfDisplayMode.FULL,
+                false,
+                true,
+                sampleBase64
+        );
+
+        PdfSealData data = new PdfSealData(
+                "Dra. Maria de Souza Ferreira",
+                "CPF: 98765432100",
+                null,
+                "AC Raiz ICP-Brasil",
+                "AABBCCDDEEFF0011",
+                "Assinatura de Contrato",
+                "Curitiba, PR",
+                CpfDisplayMode.FULL,
+                false
+        );
+
+        BufferedImage img = PdfSealRenderer.renderToImage(themeWithLogo, data);
+        assertThat(img).isNotNull();
+        assertThat(img.getWidth()).isEqualTo(640);
+        assertThat(img.getHeight()).isEqualTo(164);
+
+        byte[] pngBytes = PdfSealRenderer.renderToPngBytes(themeWithLogo, data);
+        assertThat(pngBytes).isNotEmpty();
+    }
+
+    @Test
+    @DisplayName("Deve renderizar selo quando CPF é omitido e sem data/hora (apenas nome em evidência)")
+    void shouldRenderSealWithOnlySignerName() throws IOException {
+        PdfSealTheme theme = PdfSealThemeRegistry.getDefaultTheme();
+        PdfSealData data = new PdfSealData(
+                "Gabriel Soares de Alcantara",
+                "CPF: 11122233344",
+                null,
+                "AC OAB v3",
+                "12345678",
+                "Assinatura",
+                "Brasília, DF",
+                CpfDisplayMode.NONE,
+                false
+        );
+
+        BufferedImage img = PdfSealRenderer.renderToImage(theme, data);
+        assertThat(img).isNotNull();
+        assertThat(img.getWidth()).isEqualTo(640);
+        assertThat(img.getHeight()).isEqualTo(164);
+    }
+
+    @Test
+    @DisplayName("Deve renderizar selo com informação customizada (ex: Matrícula / Cargo) na linha de identificação")
+    void shouldRenderSealWithCustomExtraInfo() throws IOException {
+        PdfSealTheme theme = PdfSealThemeRegistry.getDefaultTheme();
+        PdfSealData data = new PdfSealData(
+                "Dra. Juliana Mendes Silveira",
+                "CPF: 12345678900",
+                null,
+                "AC OAB Nacional",
+                "FEEDCBA012345678",
+                "Assinatura de Petição",
+                "São Paulo, SP",
+                CpfDisplayMode.MASKED,
+                true,
+                "OAB/SP 431.902"
+        );
+
+        BufferedImage img = PdfSealRenderer.renderToImage(theme, data);
+        assertThat(img).isNotNull();
+        assertThat(img.getWidth()).isEqualTo(640);
+        assertThat(img.getHeight()).isEqualTo(164);
+
+        byte[] pngBytes = PdfSealRenderer.renderToPngBytes(theme, data);
+        assertThat(pngBytes).isNotEmpty();
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/protocol/CcspConcurrencyTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/protocol/CcspConcurrencyTest.java
new file mode 100644
index 0000000..66a570d
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/protocol/CcspConcurrencyTest.java
@@ -0,0 +1,198 @@
+package br.com.cybercore.signer.core.protocol;
+
+import br.com.cybercore.signer.core.crypto.SigningService;
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.provider.CertificateManager;
+import br.com.cybercore.signer.core.provider.Pkcs12CertificateProvider;
+import br.com.cybercore.signer.core.security.ApplicationRegistry;
+import br.com.cybercore.signer.core.security.AuthorizedApplication;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+import javax.security.auth.x500.X500Principal;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.math.BigInteger;
+import java.net.HttpURLConnection;
+import java.net.ServerSocket;
+import java.net.URI;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Path;
+import java.security.KeyPair;
+import java.security.KeyPairGenerator;
+import java.security.KeyStore;
+import java.security.MessageDigest;
+import java.security.cert.Certificate;
+import java.security.cert.X509Certificate;
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+import java.util.ArrayList;
+import java.util.Base64;
+import java.util.Date;
+import java.util.List;
+import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.Callable;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+@DisplayName("Testes de Concorrência e Multiaplicação do Protocolo CCSP/1 (CcspConcurrencyTest)")
+class CcspConcurrencyTest {
+
+    @TempDir
+    Path tempDir;
+
+    private CcspServer server;
+    private int port;
+    private ApplicationRegistry registry;
+    private String certId;
+    private final ObjectMapper mapper = new ObjectMapper();
+
+    @BeforeEach
+    void setUp() throws Exception {
+        // Encontra porta livre
+        try (ServerSocket socket = new ServerSocket(0)) {
+            port = socket.getLocalPort();
+        }
+
+        registry = new ApplicationRegistry(tempDir.resolve("apps.json"));
+
+        // Cadastra 3 aplicações autorizadas distintas
+        registry.register(new AuthorizedApplication("app-erp", "ERP Corporativo", Set.of("http://localhost:3000"), true, Instant.now()));
+        registry.register(new AuthorizedApplication("app-juridico", "Portal Jurídico", Set.of("http://localhost:3001"), true, Instant.now()));
+        registry.register(new AuthorizedApplication("app-rh", "Sistema de RH", Set.of("http://localhost:3002"), true, Instant.now()));
+
+        KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
+        kpg.initialize(2048);
+        KeyPair keyPair = kpg.generateKeyPair();
+
+        X509Certificate cert = mock(X509Certificate.class);
+        when(cert.getSubjectX500Principal()).thenReturn(new X500Principal("CN=Empresa Concorrente:12345678000199, O=ICP-Brasil, C=BR"));
+        when(cert.getIssuerX500Principal()).thenReturn(new X500Principal("CN=AC Teste ICP-Brasil, C=BR"));
+        when(cert.getSerialNumber()).thenReturn(BigInteger.valueOf(987654321));
+        when(cert.getNotBefore()).thenReturn(Date.from(Instant.now().minus(10, ChronoUnit.DAYS)));
+        when(cert.getNotAfter()).thenReturn(Date.from(Instant.now().plus(300, ChronoUnit.DAYS)));
+        when(cert.getPublicKey()).thenReturn(keyPair.getPublic());
+        when(cert.getEncoded()).thenReturn(new byte[]{0x30, 0x10, 0x01, 0x02});
+
+        char[] password = "concurrency-password".toCharArray();
+        KeyStore keyStore = KeyStore.getInstance("PKCS12");
+        keyStore.load(null, null);
+        keyStore.setKeyEntry("cert-real-a1", keyPair.getPrivate(), password, new Certificate[]{cert});
+
+        Pkcs12CertificateProvider a1Provider = new Pkcs12CertificateProvider();
+        a1Provider.setKeyStore(keyStore, password);
+
+        CertificateManager certManager = new CertificateManager();
+        certManager.registerProvider(a1Provider);
+        certManager.discoverCertificates();
+
+        ManagedCertificate managedCert = certManager.getAvailableCertificates().get(0);
+        this.certId = managedCert.id();
+
+        SigningService signingService = new SigningService(certManager);
+
+        server = new CcspServer(port, certManager, signingService, registry, null);
+        server.start();
+    }
+
+    @AfterEach
+    void tearDown() {
+        if (server != null) {
+            server.stop();
+        }
+    }
+
+    @Test
+    @DisplayName("Deve processar 16 requisições de assinatura concorrentes de aplicações distintas com provedor real sem corrupção")
+    void shouldHandleConcurrentSigningRequestsSafely() throws Exception {
+        int threadCount = 8;
+        int requestCount = 16;
+        ExecutorService executor = Executors.newFixedThreadPool(threadCount);
+
+        CountDownLatch startLatch = new CountDownLatch(1);
+        List<Future<CcspResponse>> futures = new ArrayList<>();
+
+        String[] appIds = {"app-erp", "app-juridico", "app-rh"};
+        String[] origins = {"http://localhost:3000", "http://localhost:3001", "http://localhost:3002"};
+
+        for (int i = 0; i < requestCount; i++) {
+            final int index = i;
+            final String appId = appIds[i % appIds.length];
+            final String origin = origins[i % origins.length];
+            final String reqId = UUID.randomUUID().toString();
+            final String nonce = UUID.randomUUID().toString();
+
+            Callable<CcspResponse> task = () -> {
+                // Aguarda largada simultânea
+                startLatch.await(5, TimeUnit.SECONDS);
+
+                byte[] digest = MessageDigest.getInstance("SHA-256")
+                        .digest(("Documento_Concorrente_" + index).getBytes(StandardCharsets.UTF_8));
+                String digestBase64 = Base64.getEncoder().encodeToString(digest);
+
+                CcspRequest request = new CcspRequest(
+                        "1",
+                        reqId,
+                        appId,
+                        "sign",
+                        "SHA256withRSA",
+                        digestBase64,
+                        certId,
+                        Instant.now().plus(60, ChronoUnit.SECONDS).toString(),
+                        System.currentTimeMillis(),
+                        nonce,
+                        null
+                );
+
+                return sendSignRequest(request, origin, appId);
+            };
+
+            futures.add(executor.submit(task));
+        }
+
+        // Dispara todas simultaneamente
+        startLatch.countDown();
+
+        for (Future<CcspResponse> f : futures) {
+            CcspResponse resp = f.get(10, TimeUnit.SECONDS);
+            assertThat(resp).isNotNull();
+            assertThat(resp.status()).isEqualTo("signed");
+            assertThat(resp.signature()).isNotBlank();
+            assertThat(resp.algorithm()).isEqualTo("SHA256withRSA");
+        }
+
+        executor.shutdown();
+        assertThat(executor.awaitTermination(5, TimeUnit.SECONDS)).isTrue();
+    }
+
+    private CcspResponse sendSignRequest(CcspRequest request, String origin, String appId) throws Exception {
+        URI uri = URI.create("http://127.0.0.1:" + port + "/ccsp/v1/sign");
+        HttpURLConnection conn = (HttpURLConnection) uri.toURL().openConnection();
+        conn.setRequestMethod("POST");
+        conn.setRequestProperty("Content-Type", "application/json");
+        conn.setRequestProperty("Origin", origin);
+        conn.setRequestProperty("X-CyberCore-AppId", appId);
+        conn.setDoOutput(true);
+
+        byte[] payload = mapper.writeValueAsBytes(request);
+        try (OutputStream os = conn.getOutputStream()) {
+            os.write(payload);
+        }
+
+        try (InputStream is = conn.getInputStream()) {
+            return mapper.readValue(is, CcspResponse.class);
+        }
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/protocol/CcspProtocolTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/protocol/CcspProtocolTest.java
new file mode 100644
index 0000000..d1d23dc
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/protocol/CcspProtocolTest.java
@@ -0,0 +1,87 @@
+package br.com.cybercore.signer.core.protocol;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class CcspProtocolTest {
+
+    private final ObjectMapper objectMapper = new ObjectMapper();
+
+    @Test
+    @DisplayName("Deve serializar e deserializar CcspRequest com sucesso")
+    void shouldSerializeAndDeserializeRequest() throws Exception {
+        String json = """
+                {
+                  "version": "1",
+                  "request_id": "c1f7b640-5e6e-48a5-b1a7-0242ac120002",
+                  "application_id": "app_erp_123",
+                  "operation": "sign",
+                  "algorithm": "SHA256withRSA",
+                  "digest": "47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=",
+                  "certificate_hint": "serial_12345",
+                  "expires_at": "2030-01-01T00:00:00Z",
+                  "timestamp": 1728418000,
+                  "nonce": "test_nonce_987",
+                  "signature_type": "RAW_DIGEST"
+                }
+                """;
+
+        CcspRequest request = objectMapper.readValue(json, CcspRequest.class);
+
+        assertThat(request.version()).isEqualTo("1");
+        assertThat(request.requestId()).isEqualTo("c1f7b640-5e6e-48a5-b1a7-0242ac120002");
+        assertThat(request.applicationId()).isEqualTo("app_erp_123");
+        assertThat(request.operation()).isEqualTo("sign");
+        assertThat(request.algorithm()).isEqualTo("SHA256withRSA");
+        assertThat(request.digest()).isEqualTo("47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=");
+        assertThat(request.isVersionSupported()).isTrue();
+        assertThat(request.isExpired()).isFalse();
+    }
+
+    @Test
+    @DisplayName("Deve detectar requisição com expiração ultrapassada")
+    void shouldDetectExpiredRequest() {
+        String pastIso = Instant.now().minus(10, ChronoUnit.MINUTES).toString();
+        CcspRequest request = new CcspRequest(
+                "1", "uuid", "app", "sign", "SHA256withRSA", "digest", null, pastIso, null, null, null
+        );
+
+        assertThat(request.isExpired()).isTrue();
+    }
+
+    @Test
+    @DisplayName("Deve serializar CcspResponse de sucesso")
+    void shouldSerializeSuccessResponse() throws Exception {
+        CcspResponse response = CcspResponse.success(
+                "req_001",
+                "sig_bytes_b64",
+                "cert_b64",
+                List.of("cert_b64", "ca_b64"),
+                "SHA256withRSA"
+        );
+
+        String json = objectMapper.writeValueAsString(response);
+        assertThat(json).contains("\"status\":\"signed\"");
+        assertThat(json).contains("\"signature\":\"sig_bytes_b64\"");
+        assertThat(json).contains("\"certificate\":\"cert_b64\"");
+        assertThat(json).doesNotContain("\"mock\"");
+    }
+
+    @Test
+    @DisplayName("Deve serializar CcspResponse de erro estruturado")
+    void shouldSerializeErrorResponse() throws Exception {
+        CcspResponse response = CcspResponse.error("req_002", CcspErrorCode.USER_CANCELLED);
+
+        String json = objectMapper.writeValueAsString(response);
+        assertThat(json).contains("\"status\":\"error\"");
+        assertThat(json).contains("\"error_code\":\"USER_CANCELLED\"");
+        assertThat(json).contains("Operação cancelada pelo usuário");
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/protocol/CcspServerTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/protocol/CcspServerTest.java
new file mode 100644
index 0000000..65bc161
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/protocol/CcspServerTest.java
@@ -0,0 +1,323 @@
+package br.com.cybercore.signer.core.protocol;
+
+import br.com.cybercore.signer.core.crypto.SigningService;
+import br.com.cybercore.signer.core.domain.CertificateStatus;
+import br.com.cybercore.signer.core.domain.CertificateType;
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.domain.SigningContext;
+import br.com.cybercore.signer.core.domain.SigningResult;
+import br.com.cybercore.signer.core.provider.CertificateManager;
+import br.com.cybercore.signer.core.provider.CertificateProvider;
+import br.com.cybercore.signer.core.provider.ProviderType;
+import br.com.cybercore.signer.core.security.ApplicationRegistry;
+import br.com.cybercore.signer.core.security.AuthorizedApplication;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.nio.file.Path;
+import java.security.MessageDigest;
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+import java.util.Base64;
+import java.util.List;
+import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+@DisplayName("Testes de Integração do Servidor Local CCSP/1 (CcspServer)")
+class CcspServerTest {
+
+    private CcspServer server;
+    private HttpClient httpClient;
+    private String baseUrl;
+
+    @BeforeEach
+    void setUp(@TempDir Path tempDir) throws Exception {
+        CertificateManager certManager = new CertificateManager();
+        SigningService signingService = mock(SigningService.class);
+        ApplicationRegistry appRegistry = new ApplicationRegistry(tempDir.resolve("apps.json"));
+
+        // Registra uma aplicação de teste
+        appRegistry.register(new AuthorizedApplication(
+                "app-test",
+                "App Web Teste",
+                Set.of("http://localhost:8080", "https://meusistema.com.br"),
+                true,
+                Instant.now()
+        ));
+
+        // Mock de certificado
+        ManagedCertificate testCert = new ManagedCertificate(
+                "cert-1",
+                "AliasTeste",
+                CertificateType.A1,
+                CertificateStatus.AVAILABLE,
+                "CN=Teste ICP-Brasil, C=BR",
+                "CN=AC Raiz, C=BR",
+                "12345678",
+                "a1b2c3",
+                "d4e5f6",
+                Instant.now().minus(10, ChronoUnit.DAYS),
+                Instant.now().plus(300, ChronoUnit.DAYS),
+                "SHA256withRSA",
+                2048,
+                "Teste ICP-Brasil",
+                null,
+                null,
+                "provider-test",
+                "Certificado de Teste"
+        );
+
+        CertificateProvider dummyProvider = new CertificateProvider() {
+            @Override public String getProviderId() { return "provider-test"; }
+            @Override public String getDisplayName() { return "Provedor Teste"; }
+            @Override public ProviderType getType() { return ProviderType.A1_FILE; }
+            @Override public boolean isAvailable() { return true; }
+            @Override public List<ManagedCertificate> listCertificates() { return List.of(testCert); }
+            @Override public SigningResult sign(SigningContext context) {
+                return new SigningResult(context.requestId(), new byte[]{1, 2, 3}, "mock-cert", List.of("mock-cert"), "SHA256withRSA", Instant.now());
+            }
+        };
+
+        certManager.registerProvider(dummyProvider);
+        certManager.discoverCertificates();
+
+        when(signingService.sign(any())).thenReturn(
+                new SigningResult("req-1", new byte[]{10, 20, 30}, "base64-cert", List.of("base64-cert"), "SHA256withRSA", Instant.now())
+        );
+
+        // Instancia o servidor em porta aleatória (0)
+        server = new CcspServer(0, certManager, signingService, appRegistry, new CcspUserPromptListener() {
+            @Override
+            public CompletableFuture<Boolean> requestApplicationAuthorization(String origin, String appName, String applicationId) {
+                return CompletableFuture.completedFuture(true);
+            }
+
+            @Override
+            public CompletableFuture<Boolean> requestSignatureConfirmation(CcspRequest request, ManagedCertificate certificate) {
+                return CompletableFuture.completedFuture(true);
+            }
+        });
+
+        server.start();
+        httpClient = HttpClient.newHttpClient();
+        baseUrl = "http://127.0.0.1:" + server.getPort();
+    }
+
+    @AfterEach
+    void tearDown() {
+        if (server != null) {
+            server.stop();
+        }
+    }
+
+    @Test
+    @DisplayName("Endpoint /status deve retornar status ready e versão do agente")
+    void testGetStatus() throws Exception {
+        HttpRequest req = HttpRequest.newBuilder()
+                .uri(URI.create(baseUrl + "/ccsp/v1/status"))
+                .GET()
+                .build();
+
+        HttpResponse<String> resp = httpClient.send(req, HttpResponse.BodyHandlers.ofString());
+        assertThat(resp.statusCode()).isEqualTo(200);
+        assertThat(resp.body()).contains("\"status\":\"ready\"");
+        assertThat(resp.body()).contains("\"agent\":\"CyberCore Signer\"");
+    }
+
+    @Test
+    @DisplayName("Endpoint /certificates deve retornar a lista de certificados disponíveis")
+    void testGetCertificates() throws Exception {
+        HttpRequest req = HttpRequest.newBuilder()
+                .uri(URI.create(baseUrl + "/ccsp/v1/certificates?application_id=app-test"))
+                .header("Origin", "https://meusistema.com.br")
+                .GET()
+                .build();
+
+        HttpResponse<String> resp = httpClient.send(req, HttpResponse.BodyHandlers.ofString());
+        assertThat(resp.statusCode()).isEqualTo(200);
+        assertThat(resp.body()).contains("\"status\":\"success\"");
+        assertThat(resp.body()).contains("CN=Teste ICP-Brasil, C=BR");
+    }
+
+    @Test
+    @DisplayName("Requisição OPTIONS deve retornar headers CORS válidos")
+    void testCorsPreflight() throws Exception {
+        HttpRequest req = HttpRequest.newBuilder()
+                .uri(URI.create(baseUrl + "/ccsp/v1/sign"))
+                .method("OPTIONS", HttpRequest.BodyPublishers.noBody())
+                .header("Origin", "https://meusistema.com.br")
+                .build();
+
+        HttpResponse<Void> resp = httpClient.send(req, HttpResponse.BodyHandlers.discarding());
+        assertThat(resp.statusCode()).isEqualTo(204);
+        assertThat(resp.headers().firstValue("Access-Control-Allow-Origin")).hasValue("https://meusistema.com.br");
+        assertThat(resp.headers().firstValue("Access-Control-Allow-Methods")).hasValue("GET, POST, OPTIONS");
+    }
+
+    @Test
+    @DisplayName("Endpoint /sign deve assinar digest com sucesso")
+    void testSignSuccess() throws Exception {
+        byte[] docHash = MessageDigest.getInstance("SHA-256").digest("Contrato Digital".getBytes());
+        String hashBase64 = Base64.getEncoder().encodeToString(docHash);
+
+        String jsonPayload = """
+                {
+                    "version": "1",
+                    "request_id": "%s",
+                    "application_id": "app-test",
+                    "operation": "sign",
+                    "algorithm": "SHA256withRSA",
+                    "digest": "%s",
+                    "certificate_hint": "cert-1",
+                    "nonce": "%s"
+                }
+                """.formatted(UUID.randomUUID(), hashBase64, UUID.randomUUID());
+
+        HttpRequest req = HttpRequest.newBuilder()
+                .uri(URI.create(baseUrl + "/ccsp/v1/sign"))
+                .header("Content-Type", "application/json")
+                .header("Origin", "https://meusistema.com.br")
+                .POST(HttpRequest.BodyPublishers.ofString(jsonPayload))
+                .build();
+
+        HttpResponse<String> resp = httpClient.send(req, HttpResponse.BodyHandlers.ofString());
+        assertThat(resp.statusCode()).isEqualTo(200);
+        assertThat(resp.body()).contains("\"status\":\"signed\"");
+        assertThat(resp.body()).contains("\"signature\":");
+    }
+
+    @Test
+    @DisplayName("Endpoint /sign deve prevenir replay attack se mesmo nonce for submetido")
+    void testReplayPrevention() throws Exception {
+        byte[] docHash = MessageDigest.getInstance("SHA-256").digest("Documento".getBytes());
+        String hashBase64 = Base64.getEncoder().encodeToString(docHash);
+        String fixedNonce = "nonce-repetido-123";
+
+        String jsonPayload = """
+                {
+                    "version": "1",
+                    "request_id": "%s",
+                    "application_id": "app-test",
+                    "operation": "sign",
+                    "algorithm": "SHA256withRSA",
+                    "digest": "%s",
+                    "certificate_hint": "cert-1",
+                    "nonce": "%s"
+                }
+                """.formatted(UUID.randomUUID(), hashBase64, fixedNonce);
+
+        HttpRequest req1 = HttpRequest.newBuilder()
+                .uri(URI.create(baseUrl + "/ccsp/v1/sign"))
+                .header("Content-Type", "application/json")
+                .header("Origin", "https://meusistema.com.br")
+                .POST(HttpRequest.BodyPublishers.ofString(jsonPayload))
+                .build();
+
+        HttpResponse<String> resp1 = httpClient.send(req1, HttpResponse.BodyHandlers.ofString());
+        assertThat(resp1.statusCode()).isEqualTo(200);
+
+        // Segunda tentativa com mesmo nonce deve falhar por REPLAY_DETECTED
+        String jsonPayload2 = """
+                {
+                    "version": "1",
+                    "request_id": "%s",
+                    "application_id": "app-test",
+                    "operation": "sign",
+                    "algorithm": "SHA256withRSA",
+                    "digest": "%s",
+                    "certificate_hint": "cert-1",
+                    "nonce": "%s"
+                }
+                """.formatted(UUID.randomUUID(), hashBase64, fixedNonce);
+
+        HttpRequest req2 = HttpRequest.newBuilder()
+                .uri(URI.create(baseUrl + "/ccsp/v1/sign"))
+                .header("Content-Type", "application/json")
+                .header("Origin", "https://meusistema.com.br")
+                .POST(HttpRequest.BodyPublishers.ofString(jsonPayload2))
+                .build();
+
+        HttpResponse<String> resp2 = httpClient.send(req2, HttpResponse.BodyHandlers.ofString());
+        assertThat(resp2.statusCode()).isEqualTo(400);
+        assertThat(resp2.body()).contains("REPLAY_DETECTED");
+    }
+
+    @Test
+    @DisplayName("Deve autenticar usuário via /ccsp/v1/authenticate assinando o desafio do sistema")
+    void shouldAuthenticateUserWithChallengeSuccessfully() throws Exception {
+        String jsonPayload = """
+                {
+                    "version": "1",
+                    "request_id": "%s",
+                    "application_id": "app-test",
+                    "operation": "authenticate",
+                    "challenge": "portal-auth-challenge-%s",
+                    "certificate_hint": "cert-1",
+                    "nonce": "%s"
+                }
+                """.formatted(UUID.randomUUID(), System.currentTimeMillis(), UUID.randomUUID());
+
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(baseUrl + "/ccsp/v1/authenticate"))
+                .header("Content-Type", "application/json")
+                .header("Origin", "https://meusistema.com.br")
+                .POST(HttpRequest.BodyPublishers.ofString(jsonPayload))
+                .build();
+
+        HttpResponse<String> response = httpClient.send(request, HttpResponse.BodyHandlers.ofString());
+
+        assertThat(response.statusCode()).isEqualTo(200);
+        assertThat(response.body()).contains("\"status\":\"authenticated\"");
+        assertThat(response.body()).contains("\"signature\":\"ChQe\"");
+        assertThat(response.body()).contains("\"subject_name\":\"Teste ICP-Brasil\"");
+    }
+
+    @Test
+    @DisplayName("Deve assinar documento PDF preservando metadados de arquivo na resposta")
+    void shouldSignDocumentWithMetadataPdfSuccessfully() throws Exception {
+        byte[] hash = MessageDigest.getInstance("SHA-256").digest("PDF_CONTENT_TEST".getBytes());
+        String hashBase64 = Base64.getEncoder().encodeToString(hash);
+
+        String jsonPayload = """
+                {
+                    "version": "1",
+                    "request_id": "%s",
+                    "application_id": "app-test",
+                    "operation": "sign",
+                    "algorithm": "SHA256withRSA",
+                    "digest": "%s",
+                    "certificate_hint": "cert-1",
+                    "document_name": "proposta_comercial.pdf",
+                    "document_type": "PDF",
+                    "nonce": "%s"
+                }
+                """.formatted(UUID.randomUUID(), hashBase64, UUID.randomUUID());
+
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(baseUrl + "/ccsp/v1/sign"))
+                .header("Content-Type", "application/json")
+                .header("Origin", "https://meusistema.com.br")
+                .POST(HttpRequest.BodyPublishers.ofString(jsonPayload))
+                .build();
+
+        HttpResponse<String> response = httpClient.send(request, HttpResponse.BodyHandlers.ofString());
+
+        assertThat(response.statusCode()).isEqualTo(200);
+        assertThat(response.body()).contains("\"status\":\"signed\"");
+        assertThat(response.body()).contains("\"document_name\":\"proposta_comercial.pdf\"");
+        assertThat(response.body()).contains("\"document_type\":\"PDF\"");
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/provider/CertificateManagerTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/provider/CertificateManagerTest.java
new file mode 100644
index 0000000..f537f1d
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/provider/CertificateManagerTest.java
@@ -0,0 +1,66 @@
+package br.com.cybercore.signer.core.provider;
+
+import br.com.cybercore.signer.core.domain.CertificateStatus;
+import br.com.cybercore.signer.core.domain.CertificateType;
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+import java.util.List;
+import java.util.Optional;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+class CertificateManagerTest {
+
+    @Test
+    @DisplayName("Deve inicializar com provedores padrão")
+    void shouldCreateDefaultManagerWithProviders() {
+        CertificateManager manager = CertificateManager.createDefault();
+
+        assertThat(manager.getProviders()).isNotEmpty();
+        assertThat(manager.getProviders())
+                .extracting(CertificateProvider::getProviderId)
+                .contains("provider-win-store", "provider-a1", "provider-pkcs11");
+    }
+
+    @Test
+    @DisplayName("Deve descobrir certificados de múltiplos provedores e indexá-los")
+    void shouldDiscoverAndIndexCertificates() throws Exception {
+        CertificateManager manager = new CertificateManager();
+
+        CertificateProvider providerA1 = mock(CertificateProvider.class);
+        when(providerA1.getProviderId()).thenReturn("provider-a1");
+        when(providerA1.isAvailable()).thenReturn(true);
+
+        ManagedCertificate cert1 = new ManagedCertificate(
+                "cert-1", "Empresa ABC", CertificateType.A1, CertificateStatus.AVAILABLE,
+                "CN=Empresa ABC", "CN=AC Raiz", "123", "sha1_1", "sha256_1",
+                Instant.now().minus(1, ChronoUnit.DAYS), Instant.now().plus(300, ChronoUnit.DAYS),
+                "RSA", 2048, "Empresa ABC", null, "11222333000199", "provider-a1", null
+        );
+        when(providerA1.listCertificates()).thenReturn(List.of(cert1));
+
+        manager.registerProvider(providerA1);
+
+        List<ManagedCertificate> discovered = manager.discoverCertificates();
+
+        assertThat(discovered).hasSize(1);
+        assertThat(discovered.get(0).id()).isEqualTo("cert-1");
+        assertThat(manager.getProviderForCertificate("cert-1")).isSameAs(providerA1);
+
+        // Busca por ID
+        Optional<ManagedCertificate> byId = manager.findById("cert-1");
+        assertThat(byId).isPresent();
+        assertThat(byId.get().commonName()).isEqualTo("Empresa ABC");
+
+        // Busca por CNPJ
+        Optional<ManagedCertificate> byCnpj = manager.findByHint("11222333000199");
+        assertThat(byCnpj).isPresent();
+        assertThat(byCnpj.get().id()).isEqualTo("cert-1");
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/provider/Pkcs12CertificateProviderTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/provider/Pkcs12CertificateProviderTest.java
new file mode 100644
index 0000000..2c57824
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/provider/Pkcs12CertificateProviderTest.java
@@ -0,0 +1,130 @@
+package br.com.cybercore.signer.core.provider;
+
+import br.com.cybercore.signer.core.domain.CertificateStatus;
+import br.com.cybercore.signer.core.domain.CertificateType;
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.domain.SigningContext;
+import br.com.cybercore.signer.core.domain.SigningResult;
+import br.com.cybercore.signer.core.protocol.CcspErrorCode;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import javax.security.auth.x500.X500Principal;
+import java.math.BigInteger;
+import java.nio.charset.StandardCharsets;
+import java.security.KeyPair;
+import java.security.KeyPairGenerator;
+import java.security.KeyStore;
+import java.security.MessageDigest;
+import java.security.Signature;
+import java.security.cert.Certificate;
+import java.security.cert.X509Certificate;
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+import java.util.Date;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+class Pkcs12CertificateProviderTest {
+
+    private Pkcs12CertificateProvider provider;
+    private KeyPair keyPair;
+    private X509Certificate mockCert;
+    private KeyStore keyStore;
+    private static final char[] PASSWORD = "senha-teste".toCharArray();
+
+    @BeforeEach
+    void setUp() throws Exception {
+        provider = new Pkcs12CertificateProvider();
+
+        KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
+        kpg.initialize(2048);
+        keyPair = kpg.generateKeyPair();
+
+        mockCert = mock(X509Certificate.class);
+        when(mockCert.getSubjectX500Principal()).thenReturn(new X500Principal("CN=Empresa Teste:12345678000199, O=ICP-Brasil, C=BR"));
+        when(mockCert.getIssuerX500Principal()).thenReturn(new X500Principal("CN=AC Teste ICP-Brasil, C=BR"));
+        when(mockCert.getSerialNumber()).thenReturn(BigInteger.valueOf(987654321));
+        when(mockCert.getNotBefore()).thenReturn(Date.from(Instant.now().minus(10, ChronoUnit.DAYS)));
+        when(mockCert.getNotAfter()).thenReturn(Date.from(Instant.now().plus(300, ChronoUnit.DAYS)));
+        when(mockCert.getPublicKey()).thenReturn(keyPair.getPublic());
+        when(mockCert.getEncoded()).thenReturn(new byte[]{0x30, 0x10, 0x01, 0x02});
+
+        keyStore = KeyStore.getInstance("PKCS12");
+        keyStore.load(null, null);
+        keyStore.setKeyEntry("alias-a1", keyPair.getPrivate(), PASSWORD, new Certificate[]{mockCert});
+    }
+
+    @Test
+    @DisplayName("Deve listar certificados carregados no KeyStore PKCS#12")
+    void shouldListCertificatesFromKeyStore() throws Exception {
+        provider.setKeyStore(keyStore, PASSWORD);
+
+        assertThat(provider.isAvailable()).isTrue();
+        List<ManagedCertificate> certs = provider.listCertificates();
+
+        assertThat(certs).hasSize(1);
+        ManagedCertificate cert = certs.get(0);
+        assertThat(cert.alias()).isEqualTo("alias-a1");
+        assertThat(cert.type()).isEqualTo(CertificateType.A1);
+        assertThat(cert.status()).isEqualTo(CertificateStatus.AVAILABLE);
+        assertThat(cert.cnpj()).isEqualTo("12345678000199");
+    }
+
+    @Test
+    @DisplayName("Deve assinar digest com sucesso utilizando chave RSA do PKCS#12")
+    void shouldSignDigestSuccessfully() throws Exception {
+        provider.setKeyStore(keyStore, PASSWORD);
+
+        byte[] originalData = "Documento Contratual CyberCore 2026".getBytes(StandardCharsets.UTF_8);
+        byte[] sha256Digest = MessageDigest.getInstance("SHA-256").digest(originalData);
+
+        SigningContext context = new SigningContext(
+                "req-101",
+                "app-web-01",
+                sha256Digest,
+                "SHA256withRSA",
+                "alias-a1",
+                Instant.now()
+        );
+
+        SigningResult result = provider.sign(context);
+
+        assertThat(result).isNotNull();
+        assertThat(result.requestId()).isEqualTo("req-101");
+        assertThat(result.algorithm()).isEqualTo("SHA256withRSA");
+        assertThat(result.signatureBytes()).isNotEmpty();
+
+        // Validação criptográfica da assinatura gerada
+        Signature verifier = Signature.getInstance("SHA256withRSA");
+        verifier.initVerify(keyPair.getPublic());
+        verifier.update(sha256Digest);
+        assertThat(verifier.verify(result.signatureBytes())).isTrue();
+    }
+
+    @Test
+    @DisplayName("Deve falhar ao tentar assinar com algoritmo incompatível ou digest inválido")
+    void shouldFailOnInvalidDigest() {
+        provider.setKeyStore(keyStore, PASSWORD);
+
+        byte[] invalidDigest = new byte[10]; // Digest menor que os 32 bytes de SHA-256
+
+        SigningContext context = new SigningContext(
+                "req-102",
+                "app-web-01",
+                invalidDigest,
+                "SHA256withRSA",
+                "alias-a1",
+                Instant.now()
+        );
+
+        assertThatThrownBy(() -> provider.sign(context))
+                .isInstanceOf(CertificateProviderException.class)
+                .hasFieldOrPropertyWithValue("errorCode", CcspErrorCode.SIGNATURE_FAILED);
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/provider/WindowsCertificateStoreProviderTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/provider/WindowsCertificateStoreProviderTest.java
new file mode 100644
index 0000000..cc88720
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/provider/WindowsCertificateStoreProviderTest.java
@@ -0,0 +1,47 @@
+package br.com.cybercore.signer.core.provider;
+
+import br.com.cybercore.signer.core.domain.SigningContext;
+import br.com.cybercore.signer.core.protocol.CcspErrorCode;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
+import java.time.Instant;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+class WindowsCertificateStoreProviderTest {
+
+    @Test
+    @DisplayName("Deve inicializar o provedor e reportar identificador correto")
+    void shouldReportCorrectMetadata() {
+        WindowsCertificateStoreProvider provider = new WindowsCertificateStoreProvider();
+
+        assertThat(provider.getProviderId()).isEqualTo("provider-win-store");
+        assertThat(provider.getDisplayName()).contains("Windows");
+        assertThat(provider.getType()).isEqualTo(ProviderType.A3_WINDOWS_STORE);
+    }
+
+    @Test
+    @DisplayName("Em ambiente não-Windows deve tratar graciosamente a indisponibilidade")
+    void shouldHandleNonWindowsGracefully() throws Exception {
+        WindowsCertificateStoreProvider provider = new WindowsCertificateStoreProvider();
+
+        boolean isWindows = System.getProperty("os.name", "").toLowerCase().contains("win");
+        if (!isWindows) {
+            assertThat(provider.isAvailable()).isFalse();
+            assertThat(provider.listCertificates()).isEmpty();
+
+            byte[] digest = new byte[32];
+            SigningContext context = new SigningContext(
+                    "req_test", "app_1", digest, "SHA256withRSA", "cert_hint", Instant.now()
+            );
+
+            assertThatThrownBy(() -> provider.sign(context))
+                    .isInstanceOf(CertificateProviderException.class)
+                    .hasFieldOrPropertyWithValue("errorCode", CcspErrorCode.PROVIDER_NOT_AVAILABLE);
+        }
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/security/ApplicationRegistryTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/security/ApplicationRegistryTest.java
new file mode 100644
index 0000000..0c2cc9f
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/security/ApplicationRegistryTest.java
@@ -0,0 +1,47 @@
+package br.com.cybercore.signer.core.security;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+import java.nio.file.Path;
+import java.time.Instant;
+import java.util.Optional;
+import java.util.Set;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@DisplayName("Testes do Registro de Aplicações Autorizadas (ApplicationRegistry)")
+class ApplicationRegistryTest {
+
+    @Test
+    @DisplayName("Deve registrar, consultar e persistir aplicação com origens permitidas")
+    void testRegisterAndPersist(@TempDir Path tempDir) {
+        Path jsonPath = tempDir.resolve("test-apps.json");
+        ApplicationRegistry registry = new ApplicationRegistry(jsonPath);
+
+        AuthorizedApplication app = new AuthorizedApplication(
+                "app-123",
+                "Portal ERP Corporativo",
+                Set.of("https://erp.empresa.com.br", "http://localhost:3000"),
+                true,
+                Instant.now()
+        );
+
+        registry.register(app);
+
+        assertThat(registry.findById("app-123")).isPresent();
+        assertThat(registry.isAuthorized("app-123", "https://erp.empresa.com.br")).isTrue();
+        assertThat(registry.isAuthorized("app-123", "https://malicious-site.com")).isFalse();
+
+        // Novo registry no mesmo arquivo para validar persistência
+        ApplicationRegistry reloaded = new ApplicationRegistry(jsonPath);
+        Optional<AuthorizedApplication> loaded = reloaded.findById("app-123");
+        assertThat(loaded).isPresent();
+        assertThat(loaded.get().name()).isEqualTo("Portal ERP Corporativo");
+
+        // Revogação
+        reloaded.revoke("app-123");
+        assertThat(reloaded.findById("app-123")).isEmpty();
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/security/NonceManagerTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/security/NonceManagerTest.java
new file mode 100644
index 0000000..4a59247
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/security/NonceManagerTest.java
@@ -0,0 +1,31 @@
+package br.com.cybercore.signer.core.security;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.time.Duration;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class NonceManagerTest {
+
+    @Test
+    @DisplayName("Deve aceitar primeiro registro e rejeitar repetição (replay)")
+    void shouldAcceptOnceAndRejectDuplicate() {
+        NonceManager manager = new NonceManager(Duration.ofMinutes(1));
+
+        boolean first = manager.registerNonce("nonce_abc_123");
+        boolean second = manager.registerNonce("nonce_abc_123");
+
+        assertThat(first).isTrue();
+        assertThat(second).isFalse();
+    }
+
+    @Test
+    @DisplayName("Deve rejeitar nonce nulo ou vazio")
+    void shouldRejectInvalidNonce() {
+        NonceManager manager = new NonceManager();
+        assertThat(manager.registerNonce(null)).isFalse();
+        assertThat(manager.registerNonce("   ")).isFalse();
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/security/OriginValidatorTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/security/OriginValidatorTest.java
new file mode 100644
index 0000000..a417299
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/security/OriginValidatorTest.java
@@ -0,0 +1,46 @@
+package br.com.cybercore.signer.core.security;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.util.Set;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class OriginValidatorTest {
+
+    private final OriginValidator validator = new OriginValidator();
+
+    @Test
+    @DisplayName("Deve permitir origem exatamente autorizada")
+    void shouldAllowAuthorizedOrigin() {
+        AuthorizedApplication app = new AuthorizedApplication(
+                "app_1", "Portal ERP", Set.of("https://erp.empresa.com.br", "http://localhost:3000"), true, null
+        );
+
+        assertThat(validator.isAllowed("https://erp.empresa.com.br", app)).isTrue();
+        assertThat(validator.isAllowed("http://localhost:3000", app)).isTrue();
+    }
+
+    @Test
+    @DisplayName("Deve rejeitar origens não cadastradas ou fraudulentas")
+    void shouldRejectUnauthorizedOrigin() {
+        AuthorizedApplication app = new AuthorizedApplication(
+                "app_1", "Portal ERP", Set.of("https://erp.empresa.com.br"), true, null
+        );
+
+        assertThat(validator.isAllowed("https://malicious-site.com", app)).isFalse();
+        assertThat(validator.isAllowed("https://erp.empresa.com.br.attacker.com", app)).isFalse();
+        assertThat(validator.isAllowed(null, app)).isFalse();
+    }
+
+    @Test
+    @DisplayName("Deve rejeitar qualquer origem se a aplicação estiver desabilitada")
+    void shouldRejectWhenApplicationIsDisabled() {
+        AuthorizedApplication app = new AuthorizedApplication(
+                "app_1", "Portal ERP", Set.of("https://erp.empresa.com.br"), false, null
+        );
+
+        assertThat(validator.isAllowed("https://erp.empresa.com.br", app)).isFalse();
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/security/PinSessionManagerTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/security/PinSessionManagerTest.java
new file mode 100644
index 0000000..759750e
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/security/PinSessionManagerTest.java
@@ -0,0 +1,61 @@
+package br.com.cybercore.signer.core.security;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class PinSessionManagerTest {
+
+    private PinSessionManager manager;
+
+    @BeforeEach
+    void setUp() {
+        manager = new PinSessionManager();
+        manager.clearAll();
+    }
+
+    @Test
+    @DisplayName("Deve salvar e recuperar PIN de sessão para um certificado")
+    void shouldSaveAndRetrievePin() {
+        char[] pin = "1234".toCharArray();
+        manager.savePin("cert-1", pin);
+
+        assertThat(manager.hasPin("cert-1")).isTrue();
+        assertThat(manager.getPin("cert-1")).isEqualTo("1234".toCharArray());
+    }
+
+    @Test
+    @DisplayName("Deve limpar PIN e sobrescrever array com espaços")
+    void shouldClearPinAndWipeMemory() {
+        char[] pin = "5678".toCharArray();
+        manager.savePin("cert-2", pin);
+
+        manager.clearPin("cert-2");
+        assertThat(manager.hasPin("cert-2")).isFalse();
+        assertThat(manager.getPin("cert-2")).isNull();
+    }
+
+    @Test
+    @DisplayName("Quando alwaysPromptPin estiver ativo, não deve retornar PIN salvo")
+    void shouldIgnoreStoredPinWhenAlwaysPromptIsActive() {
+        manager.savePin("cert-3", "9999".toCharArray());
+        manager.setAlwaysPromptPin(true);
+
+        assertThat(manager.hasPin("cert-3")).isFalse();
+        assertThat(manager.getPin("cert-3")).isNull();
+    }
+
+    @Test
+    @DisplayName("Deve limpar todos os PINs em memória")
+    void shouldClearAllPins() {
+        manager.savePin("cert-a", "1111".toCharArray());
+        manager.savePin("cert-b", "2222".toCharArray());
+
+        manager.clearAll();
+
+        assertThat(manager.hasPin("cert-a")).isFalse();
+        assertThat(manager.hasPin("cert-b")).isFalse();
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/security/SmartCardSessionManagerTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/security/SmartCardSessionManagerTest.java
new file mode 100644
index 0000000..4627671
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/security/SmartCardSessionManagerTest.java
@@ -0,0 +1,18 @@
+package br.com.cybercore.signer.core.security;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+
+@DisplayName("Testes de Gerenciamento de Sessão de Smart Card (SmartCardSessionManager)")
+class SmartCardSessionManagerTest {
+
+    @Test
+    @DisplayName("Deve executar resetCardSessions sem lançar exceções mesmo se o hardware não estiver presente")
+    void testResetCardSessionsSafeExecution() {
+        assertDoesNotThrow(() -> {
+            SmartCardSessionManager.resetCardSessions();
+        });
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/security/SmartCardWatcherTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/security/SmartCardWatcherTest.java
new file mode 100644
index 0000000..e49d519
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/security/SmartCardWatcherTest.java
@@ -0,0 +1,51 @@
+package br.com.cybercore.signer.core.security;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@DisplayName("Testes de Monitoramento Dinâmico de Smart Cards (SmartCardWatcher)")
+class SmartCardWatcherTest {
+
+    @Test
+    @DisplayName("Deve gerenciar ciclo de vida (start/stop) sem exceção")
+    void shouldManageLifecycleGracefully() {
+        SmartCardWatcher watcher = new SmartCardWatcher();
+        assertThat(watcher.isRunning()).isFalse();
+
+        watcher.start();
+        assertThat(watcher.isRunning()).isTrue();
+
+        watcher.stop();
+        assertThat(watcher.isRunning()).isFalse();
+    }
+
+    @Test
+    @DisplayName("Deve adicionar e remover listeners corretamente")
+    void shouldAddAndRemoveListeners() {
+        SmartCardWatcher watcher = new SmartCardWatcher();
+        AtomicBoolean inserted = new AtomicBoolean(false);
+        AtomicBoolean removed = new AtomicBoolean(false);
+
+        SmartCardWatcher.CardEventListener listener = new SmartCardWatcher.CardEventListener() {
+            @Override
+            public void onCardInserted(String terminalName) {
+                inserted.set(true);
+            }
+
+            @Override
+            public void onCardRemoved(String terminalName) {
+                removed.set(true);
+            }
+        };
+
+        watcher.addListener(listener);
+        watcher.removeListener(listener);
+        // Não deve falhar nem disparar listeners removidos
+        assertThat(inserted.get()).isFalse();
+        assertThat(removed.get()).isFalse();
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/validation/SignatureValidationServiceTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/validation/SignatureValidationServiceTest.java
new file mode 100644
index 0000000..5dfdfa5
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/validation/SignatureValidationServiceTest.java
@@ -0,0 +1,183 @@
+package br.com.cybercore.signer.core.validation;
+
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.pdf.PdfSignatureOptions;
+import br.com.cybercore.signer.core.pdf.PdfSigningService;
+import br.com.cybercore.signer.core.provider.CertificateManager;
+import br.com.cybercore.signer.core.provider.Pkcs12CertificateProvider;
+import org.apache.pdfbox.pdmodel.PDDocument;
+import org.apache.pdfbox.pdmodel.PDPage;
+import org.bouncycastle.asn1.x500.X500Name;
+import org.bouncycastle.cert.X509CertificateHolder;
+import org.bouncycastle.cert.X509v3CertificateBuilder;
+import org.bouncycastle.cert.jcajce.JcaX509CertificateConverter;
+import org.bouncycastle.cert.jcajce.JcaX509v3CertificateBuilder;
+import org.bouncycastle.cms.CMSProcessableByteArray;
+import org.bouncycastle.cms.CMSSignedData;
+import org.bouncycastle.cms.CMSSignedDataGenerator;
+import org.bouncycastle.cms.jcajce.JcaSignerInfoGeneratorBuilder;
+import org.bouncycastle.operator.ContentSigner;
+import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder;
+import org.bouncycastle.operator.jcajce.JcaDigestCalculatorProviderBuilder;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.io.ByteArrayOutputStream;
+import java.math.BigInteger;
+import java.nio.charset.StandardCharsets;
+import java.security.KeyPair;
+import java.security.KeyPairGenerator;
+import java.security.KeyStore;
+import java.security.cert.Certificate;
+import java.security.cert.X509Certificate;
+import java.util.Date;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@DisplayName("Testes do Serviço de Validação de Assinaturas (SignatureValidationService)")
+class SignatureValidationServiceTest {
+
+    private SignatureValidationService validationService;
+    private KeyPair keyPair;
+    private X509Certificate certificate;
+    private CertificateManager certificateManager;
+    private String testCertId;
+
+    @BeforeEach
+    void setUp() throws Exception {
+        validationService = new SignatureValidationService();
+
+        // 1. Gera par de chaves e certificado X.509 em memória
+        KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
+        kpg.initialize(2048);
+        keyPair = kpg.generateKeyPair();
+
+        long now = System.currentTimeMillis();
+        Date notBefore = new Date(now - 10000);
+        Date notAfter = new Date(now + 365L * 24 * 3600 * 1000);
+
+        X500Name subject = new X500Name("CN=Advogado Teste da Silva:98765432100, O=CyberCore, C=BR");
+        X509v3CertificateBuilder certBuilder = new JcaX509v3CertificateBuilder(
+                subject,
+                BigInteger.valueOf(now),
+                notBefore,
+                notAfter,
+                subject,
+                keyPair.getPublic()
+        );
+
+        ContentSigner signer = new JcaContentSignerBuilder("SHA256withRSA").build(keyPair.getPrivate());
+        certificate = new JcaX509CertificateConverter().getCertificate(certBuilder.build(signer));
+
+        // 2. Configura KeyStore em memória e CertificateManager
+        KeyStore ks = KeyStore.getInstance("PKCS12");
+        ks.load(null, null);
+        ks.setKeyEntry("test-alias", keyPair.getPrivate(), "secret".toCharArray(), new Certificate[]{certificate});
+
+        Pkcs12CertificateProvider provider = new Pkcs12CertificateProvider("test-provider", "Provedor de Teste");
+        provider.setKeyStore(ks, "secret".toCharArray());
+        certificateManager = new CertificateManager();
+        certificateManager.registerProvider(provider);
+
+        List<ManagedCertificate> certs = certificateManager.discoverCertificates();
+        testCertId = certs.get(0).id();
+    }
+
+    @Test
+    @DisplayName("Deve validar com sucesso uma assinatura CMS destacada (Detached)")
+    void shouldValidateDetachedSignatureSuccessfully() throws Exception {
+        byte[] docBytes = "Conteúdo importante do contrato digital CyberCore.".getBytes(StandardCharsets.UTF_8);
+
+        // Gera assinatura CMS destacada
+        CMSSignedDataGenerator gen = new CMSSignedDataGenerator();
+        ContentSigner sha256Signer = new JcaContentSignerBuilder("SHA256withRSA").build(keyPair.getPrivate());
+        gen.addSignerInfoGenerator(new JcaSignerInfoGeneratorBuilder(
+                new JcaDigestCalculatorProviderBuilder().build()
+        ).build(sha256Signer, certificate));
+        gen.addCertificate(new X509CertificateHolder(certificate.getEncoded()));
+
+        CMSSignedData signedData = gen.generate(new CMSProcessableByteArray(docBytes), false);
+        byte[] signatureBytes = signedData.getEncoded();
+
+        ValidationResult result = validationService.validateDetached(docBytes, signatureBytes, "contrato.txt");
+
+        assertThat(result.isValid()).isTrue();
+        assertThat(result.status()).isEqualTo(ValidationStatus.VALID);
+        assertThat(result.type()).isEqualTo(ValidationType.DETACHED_CMS);
+        assertThat(result.signers()).hasSize(1);
+        assertThat(result.signers().get(0).signerName()).contains("Advogado Teste da Silva");
+        assertThat(result.signers().get(0).digestValid()).isTrue();
+        assertThat(result.signers().get(0).signatureValid()).isTrue();
+    }
+
+    @Test
+    @DisplayName("Deve acusar falha de validação quando o documento original foi alterado (adulteração)")
+    void shouldFailWhenDocumentHasBeenTampered() throws Exception {
+        byte[] originalBytes = "Documento original intocado.".getBytes(StandardCharsets.UTF_8);
+        byte[] tamperedBytes = "Documento adulterado maliciosamente.".getBytes(StandardCharsets.UTF_8);
+
+        // Gera assinatura do original
+        CMSSignedDataGenerator gen = new CMSSignedDataGenerator();
+        ContentSigner sha256Signer = new JcaContentSignerBuilder("SHA256withRSA").build(keyPair.getPrivate());
+        gen.addSignerInfoGenerator(new JcaSignerInfoGeneratorBuilder(
+                new JcaDigestCalculatorProviderBuilder().build()
+        ).build(sha256Signer, certificate));
+        gen.addCertificate(new X509CertificateHolder(certificate.getEncoded()));
+
+        CMSSignedData signedData = gen.generate(new CMSProcessableByteArray(originalBytes), false);
+        byte[] signatureBytes = signedData.getEncoded();
+
+        // Valida passando o documento adulterado
+        ValidationResult result = validationService.validateDetached(tamperedBytes, signatureBytes, "doc.txt");
+
+        assertThat(result.isValid()).isFalse();
+        assertThat(result.status()).isEqualTo(ValidationStatus.INVALID);
+    }
+
+    @Test
+    @DisplayName("Deve validar com sucesso um documento PDF assinado (PAdES Incorporado)")
+    void shouldValidateSignedPdfSuccessfully() throws Exception {
+        // Cria PDF simples em memória
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        try (PDDocument doc = new PDDocument()) {
+            doc.addPage(new PDPage());
+            doc.save(baos);
+        }
+        byte[] rawPdf = baos.toByteArray();
+
+        // Assina o PDF via PdfSigningService
+        PdfSigningService signingService = new PdfSigningService(certificateManager);
+        PdfSignatureOptions options = PdfSignatureOptions.builder(testCertId)
+                .visibleSeal(true)
+                .reason("Assinatura de teste unitário")
+                .build();
+
+        byte[] signedPdf = signingService.signPdf(rawPdf, options);
+
+        // Valida como assinatura incorporada
+        ValidationResult result = validationService.validateAttached(signedPdf, "documento_assinado.pdf");
+
+        assertThat(result.isValid()).isTrue();
+        assertThat(result.type()).isEqualTo(ValidationType.PADES_PDF);
+        assertThat(result.signers()).isNotEmpty();
+        assertThat(result.signers().get(0).signatureValid()).isTrue();
+    }
+
+    @Test
+    @DisplayName("Deve acusar inválido para PDF que não possui assinaturas")
+    void shouldFailForUnsignedPdf() throws Exception {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        try (PDDocument doc = new PDDocument()) {
+            doc.addPage(new PDPage());
+            doc.save(baos);
+        }
+
+        ValidationResult result = validationService.validateAttached(baos.toByteArray(), "em_branco.pdf");
+
+        assertThat(result.isValid()).isFalse();
+        assertThat(result.type()).isEqualTo(ValidationType.PADES_PDF);
+        assertThat(result.summaryMessage()).contains("Nenhuma assinatura digital encontrada");
+    }
+}
diff --git a/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/xml/XmlSigningServiceTest.java b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/xml/XmlSigningServiceTest.java
new file mode 100644
index 0000000..254028b
--- /dev/null
+++ b/modules/cybercore-core/src/test/java/br/com/cybercore/signer/core/xml/XmlSigningServiceTest.java
@@ -0,0 +1,152 @@
+package br.com.cybercore.signer.core.xml;
+
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.provider.CertificateManager;
+import br.com.cybercore.signer.core.provider.Pkcs12CertificateProvider;
+import org.bouncycastle.asn1.x500.X500Name;
+import org.bouncycastle.cert.X509v3CertificateBuilder;
+import org.bouncycastle.cert.jcajce.JcaX509CertificateConverter;
+import org.bouncycastle.cert.jcajce.JcaX509v3CertificateBuilder;
+import org.bouncycastle.operator.ContentSigner;
+import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.math.BigInteger;
+import java.nio.charset.StandardCharsets;
+import java.security.KeyPair;
+import java.security.KeyPairGenerator;
+import java.security.KeyStore;
+import java.security.cert.Certificate;
+import java.security.cert.X509Certificate;
+import java.util.Date;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class XmlSigningServiceTest {
+
+    private CertificateManager certificateManager;
+    private XmlSigningService xmlSigningService;
+    private String testCertId;
+
+    @BeforeEach
+    void setUp() throws Exception {
+        certificateManager = new CertificateManager();
+
+        KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
+        kpg.initialize(2048);
+        KeyPair kp = kpg.generateKeyPair();
+
+        long now = System.currentTimeMillis();
+        Date notBefore = new Date(now - 100000);
+        Date notAfter = new Date(now + 365L * 24 * 3600 * 1000);
+
+        X500Name subject = new X500Name("CN=Empresa Teste LTDA:98765432000199, O=CyberCore XML, C=BR");
+        X509v3CertificateBuilder certBuilder = new JcaX509v3CertificateBuilder(
+                subject,
+                BigInteger.valueOf(System.currentTimeMillis()),
+                notBefore,
+                notAfter,
+                subject,
+                kp.getPublic()
+        );
+
+        ContentSigner signer = new JcaContentSignerBuilder("SHA256withRSA").build(kp.getPrivate());
+        X509Certificate cert = new JcaX509CertificateConverter().getCertificate(certBuilder.build(signer));
+
+        KeyStore ks = KeyStore.getInstance("PKCS12");
+        ks.load(null, null);
+        char[] pwd = "xmlpassword".toCharArray();
+        ks.setKeyEntry("xml-cert", kp.getPrivate(), pwd, new Certificate[]{cert});
+
+        Pkcs12CertificateProvider provider = new Pkcs12CertificateProvider("xml-provider", "Provedor XML Teste");
+        provider.setKeyStore(ks, pwd);
+        certificateManager.registerProvider(provider);
+
+        List<ManagedCertificate> list = certificateManager.discoverCertificates();
+        this.testCertId = list.get(0).id();
+
+        this.xmlSigningService = new XmlSigningService(certificateManager);
+    }
+
+    @Test
+    @DisplayName("Deve assinar documento XML completo com XMLDSig Enveloped e validar com sucesso")
+    void shouldSignWholeXmlDocumentAndValidate() throws Exception {
+        String xml = """
+                <?xml version="1.0" encoding="UTF-8"?>
+                <pedido id="ped-1001">
+                    <cliente>Fulano de Tal</cliente>
+                    <valor>1500.00</valor>
+                </pedido>
+                """;
+
+        XmlSignatureOptions options = XmlSignatureOptions.wholeDocument(testCertId, null);
+        byte[] signedXmlBytes = xmlSigningService.signXml(xml.getBytes(StandardCharsets.UTF_8), options);
+
+        String signedXmlStr = new String(signedXmlBytes, StandardCharsets.UTF_8);
+        assertThat(signedXmlStr).contains("<Signature");
+        assertThat(signedXmlStr).contains("<SignedInfo");
+        assertThat(signedXmlStr).contains("<SignatureValue");
+        assertThat(signedXmlStr).contains("<KeyInfo");
+
+        // Validação criptográfica
+        boolean isValid = xmlSigningService.validateXmlSignature(signedXmlBytes);
+        assertThat(isValid).isTrue();
+    }
+
+    @Test
+    @DisplayName("Deve assinar nó XML específico com atributo Id (estilo NF-e) e validar")
+    void shouldSignSpecificXmlElementById() throws Exception {
+        String nfeXml = """
+                <?xml version="1.0" encoding="UTF-8"?>
+                <NFe xmlns="http://www.portalfiscal.inf.br/nfe">
+                    <infNFe Id="NFe35261012345678000195550010000000011000000010">
+                        <ide>
+                            <nNF>1</nNF>
+                        </ide>
+                        <total>
+                            <vNF>250.00</vNF>
+                        </total>
+                    </infNFe>
+                </NFe>
+                """;
+
+        XmlSignatureOptions options = XmlSignatureOptions.forElement(
+                testCertId,
+                null,
+                "infNFe",
+                "NFe35261012345678000195550010000000011000000010"
+        );
+
+        byte[] signedNfe = xmlSigningService.signXml(nfeXml.getBytes(StandardCharsets.UTF_8), options);
+        String signedStr = new String(signedNfe, StandardCharsets.UTF_8);
+
+        assertThat(signedStr).contains("URI=\"#NFe35261012345678000195550010000000011000000010\"");
+
+        boolean isValid = xmlSigningService.validateXmlSignature(signedNfe);
+        assertThat(isValid).isTrue();
+    }
+
+    @Test
+    @DisplayName("Deve detectar adulteração em XML assinado e reprovar na validação")
+    void shouldDetectTamperingInSignedXml() throws Exception {
+        String xml = """
+                <?xml version="1.0" encoding="UTF-8"?>
+                <contrato>
+                    <clausula>Pagamento de R$ 100,00</clausula>
+                </contrato>
+                """;
+
+        XmlSignatureOptions options = XmlSignatureOptions.wholeDocument(testCertId, null);
+        byte[] signedXml = xmlSigningService.signXml(xml.getBytes(StandardCharsets.UTF_8), options);
+
+        // Adulteração intencional do conteúdo original
+        String tampered = new String(signedXml, StandardCharsets.UTF_8)
+                .replace("R$ 100,00", "R$ 999.999,00");
+
+        boolean isValid = xmlSigningService.validateXmlSignature(tampered.getBytes(StandardCharsets.UTF_8));
+        assertThat(isValid).isFalse();
+    }
+}
diff --git a/modules/cybercore-ui/pom.xml b/modules/cybercore-ui/pom.xml
new file mode 100644
index 0000000..dd7fc5f
--- /dev/null
+++ b/modules/cybercore-ui/pom.xml
@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>br.com.cybercore.signer</groupId>
+        <artifactId>cybercore-signer-parent</artifactId>
+        <version>0.1.0-SNAPSHOT</version>
+        <relativePath>../../pom.xml</relativePath>
+    </parent>
+
+    <artifactId>cybercore-ui</artifactId>
+    <packaging>jar</packaging>
+
+    <name>CyberCore Signer :: UI</name>
+    <description>Camada de apresentação JavaFX, System Tray nativo, diálogos e gerenciamento de temas.</description>
+
+    <dependencies>
+        <dependency>
+            <groupId>br.com.cybercore.signer</groupId>
+            <artifactId>cybercore-core</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-controls</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-graphics</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-base</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+        </dependency>
+
+        <!-- Testes -->
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-core</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/CyberCoreDesktopApplication.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/CyberCoreDesktopApplication.java
new file mode 100644
index 0000000..9314f21
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/CyberCoreDesktopApplication.java
@@ -0,0 +1,496 @@
+package br.com.cybercore.signer.ui;
+
+import br.com.cybercore.signer.core.crypto.SigningService;
+import br.com.cybercore.signer.core.diagnostics.DiagnosticService;
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.domain.SigningContext;
+import br.com.cybercore.signer.core.domain.SigningResult;
+import br.com.cybercore.signer.core.protocol.CcspErrorCode;
+import br.com.cybercore.signer.core.provider.CertificateManager;
+import br.com.cybercore.signer.core.provider.CertificateProviderException;
+import br.com.cybercore.signer.core.provider.Pkcs12CertificateProvider;
+import br.com.cybercore.signer.ui.view.A1PasswordDialog;
+import br.com.cybercore.signer.ui.view.CertificateDetailsDialog;
+import br.com.cybercore.signer.ui.view.MainAppView;
+import br.com.cybercore.signer.ui.theme.ThemeManager;
+import br.com.cybercore.signer.core.protocol.CcspRequest;
+import br.com.cybercore.signer.core.protocol.CcspServer;
+import br.com.cybercore.signer.core.protocol.CcspUserPromptListener;
+import br.com.cybercore.signer.core.security.ApplicationRegistry;
+import br.com.cybercore.signer.core.security.AuthorizedApplication;
+import br.com.cybercore.signer.core.security.SmartCardWatcher;
+import br.com.cybercore.signer.ui.components.SvgIcons;
+import br.com.cybercore.signer.ui.view.PdfSignDialog;
+import br.com.cybercore.signer.ui.view.XmlSignDialog;
+import br.com.cybercore.signer.ui.tray.SystemTrayManager;
+import br.com.cybercore.signer.ui.view.AboutView;
+import br.com.cybercore.signer.ui.view.ApplicationApprovalDialog;
+import br.com.cybercore.signer.ui.view.BatchSigningDialog;
+import br.com.cybercore.signer.ui.view.CertificatesManagerDialog;
+import br.com.cybercore.signer.ui.view.FileSignDialog;
+import br.com.cybercore.signer.ui.view.LogsViewerDialog;
+import br.com.cybercore.signer.ui.view.SealDesignerDialog;
+import br.com.cybercore.signer.ui.view.SealManagementDialog;
+import br.com.cybercore.signer.ui.view.SettingsView;
+import br.com.cybercore.signer.ui.view.SignaturePromptDialog;
+import br.com.cybercore.signer.ui.view.SignatureValidationDialog;
+import br.com.cybercore.signer.ui.view.TutorialDialog;
+import javafx.application.Application;
+import javafx.application.Platform;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.ScrollPane;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.VBox;
+import javafx.stage.Modality;
+import javafx.scene.control.Alert;
+import javafx.scene.control.ButtonType;
+import javafx.stage.FileChooser;
+import javafx.stage.Stage;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.security.MessageDigest;
+import java.time.Instant;
+import java.util.Arrays;
+import java.util.Base64;
+import java.util.List;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+
+/**
+ * Ponto de entrada JavaFX da interface desktop do CyberCore Signer.
+ * Conectado diretamente ao CertificateManager e SigningService reais do sistema operacional.
+ */
+public class CyberCoreDesktopApplication extends Application {
+
+    private static final Logger logger = LoggerFactory.getLogger(CyberCoreDesktopApplication.class);
+
+    private static boolean developmentMode = false;
+    private static MainAppView mainAppView;
+
+    private CertificateManager certificateManager;
+    private SigningService signingService;
+    private CcspServer ccspServer;
+    private SystemTrayManager systemTrayManager;
+    private SmartCardWatcher smartCardWatcher;
+
+    public static void setDevelopmentMode(boolean devMode) {
+        developmentMode = devMode;
+    }
+
+    public static MainAppView getMainAppView() {
+        return mainAppView;
+    }
+
+    @Override
+    public void start(Stage primaryStage) {
+        logger.info("Iniciando interface gráfica JavaFX...");
+        Platform.setImplicitExit(false);
+
+        // Inicializa serviços centrais reais da plataforma
+        this.certificateManager = CertificateManager.createDefault();
+
+        if (developmentMode) {
+            logger.info("Modo de desenvolvimento ativo (utilizando certificados reais da máquina).");
+        }
+
+        mainAppView = new MainAppView(primaryStage);
+
+        // Ações da Grade de Assinatura e Validação
+        mainAppView.setOnSignPdf(() -> new PdfSignDialog(primaryStage, certificateManager).show());
+        mainAppView.setOnSignXml(() -> new XmlSignDialog(primaryStage, certificateManager).show());
+        mainAppView.setOnSignFile(() -> new FileSignDialog(primaryStage, "Assinar Arquivo", "*.*", SvgIcons.fileIcon(), certificateManager, signingService).show());
+        mainAppView.setOnBatchSign(() -> new BatchSigningDialog(primaryStage, certificateManager, signingService).show());
+        mainAppView.setOnAttachedSign(() -> new FileSignDialog(primaryStage, "Assinatura Atachada", "*.*", SvgIcons.attachedIcon(), certificateManager, signingService).show());
+        mainAppView.setOnCoSign(() -> new FileSignDialog(primaryStage, "Co-Assinar Documento", "*.*", SvgIcons.coSignIcon(), certificateManager, signingService).show());
+        mainAppView.setOnTimestamp(() -> new SignatureValidationDialog(primaryStage, true).show());
+        mainAppView.setOnLtvSign(() -> new FileSignDialog(primaryStage, "Assinatura de Longa Duração (LTV)", "*.*", SvgIcons.ltvIcon(), certificateManager, signingService).show());
+        mainAppView.setOnValidateSignature(() -> new SignatureValidationDialog(primaryStage, false).show());
+        mainAppView.setOnValidateTimestamp(() -> new SignatureValidationDialog(primaryStage, true).show());
+        mainAppView.setOnManageSeals(() -> new SealManagementDialog(primaryStage).show());
+        mainAppView.setOnExit(() -> {
+            logger.info("Encerrando CyberCore Signer pela interface gráfica.");
+            primaryStage.close();
+            Platform.exit();
+            System.exit(0);
+        });
+
+        // Ações do Painel Lateral
+        mainAppView.setOnLogs(() -> new LogsViewerDialog(primaryStage).show());
+        mainAppView.setOnSettings(() -> openSettingsDialog(primaryStage));
+        mainAppView.setOnTutorial(() -> new TutorialDialog(primaryStage).show());
+        mainAppView.setOnCertificates(() -> new CertificatesManagerDialog(primaryStage, certificateManager).show());
+        mainAppView.setOnAbout(() -> openAboutDialog(primaryStage));
+
+        // Inicializa o servidor local do protocolo CCSP/1 para atender requisições do navegador
+        initCcspServer(primaryStage);
+
+        // Monitoramento em tempo real de conexão/remoção de Smart Cards e Tokens USB
+        initSmartCardWatcher();
+
+        // Configura bandeja do sistema (System Tray) para operação contínua em segundo plano
+        this.systemTrayManager = new SystemTrayManager(primaryStage, this::refreshCertificates);
+        this.systemTrayManager.setup();
+
+        // Carrega os certificados instalados na máquina do usuário
+        refreshCertificates();
+
+        mainAppView.show();
+        logger.info("Janela principal JavaFX exibida.");
+    }
+
+    private void refreshCertificates() {
+        try {
+            List<ManagedCertificate> certs = certificateManager.discoverCertificates();
+            logger.info("Descoberta concluída: {} certificado(s) real(is) identificado(s).", certs.size());
+        } catch (Exception e) {
+            logger.error("Erro ao atualizar lista de certificados: {}", e.getMessage(), e);
+        }
+    }
+
+    private void openSettingsDialog(Stage owner) {
+        Stage dlg = new Stage();
+        dlg.initModality(Modality.APPLICATION_MODAL);
+        dlg.initOwner(owner);
+        dlg.setTitle("CyberCore Signer — Configurações");
+        dlg.setResizable(true);
+        dlg.setMinWidth(660);
+        dlg.setMinHeight(520);
+
+        SettingsView settingsView = new SettingsView();
+        settingsView.updateApplications(ApplicationRegistry.getInstance().listAll());
+        settingsView.setOnRevokeApplication(appId -> {
+            logger.info("Revogando autorização da aplicação web [id={}]", appId);
+            ApplicationRegistry.getInstance().revoke(appId);
+            settingsView.updateApplications(ApplicationRegistry.getInstance().listAll());
+        });
+
+        ScrollPane scrollPane = new ScrollPane(settingsView);
+        scrollPane.setFitToWidth(true);
+        scrollPane.setStyle("-fx-background: transparent; -fx-background-color: transparent;");
+        VBox.setVgrow(scrollPane, Priority.ALWAYS);
+
+        Button btnClose = new Button(" Fechar", SvgIcons.closeIcon(13));
+        btnClose.getStyleClass().add("btn-secondary");
+        btnClose.setPrefWidth(95);
+        btnClose.setOnAction(e -> dlg.close());
+
+        HBox footer = new HBox(btnClose);
+        footer.setAlignment(Pos.CENTER_RIGHT);
+        footer.setPadding(new Insets(10, 24, 16, 24));
+
+        VBox layout = new VBox(scrollPane, footer);
+        layout.getStyleClass().add("dialog-container");
+
+        Scene sc = new Scene(layout, 720, 580);
+        ThemeManager.applyTheme(sc);
+        dlg.setScene(sc);
+        dlg.show();
+    }
+
+    private void openAboutDialog(Stage owner) {
+        Stage dlg = new Stage();
+        dlg.initModality(Modality.APPLICATION_MODAL);
+        dlg.initOwner(owner);
+        dlg.setTitle("CyberCore Signer — Sobre");
+        dlg.setResizable(true);
+        dlg.setMinWidth(540);
+        dlg.setMinHeight(420);
+
+        AboutView aboutView = new AboutView();
+        Button btnClose = new Button(" Fechar", SvgIcons.closeIcon(13));
+        btnClose.getStyleClass().add("btn-primary");
+        btnClose.setPrefWidth(95);
+        btnClose.setOnAction(e -> dlg.close());
+
+        HBox footer = new HBox(btnClose);
+        footer.setAlignment(Pos.CENTER);
+        footer.setPadding(new Insets(10, 24, 20, 24));
+
+        VBox layout = new VBox(aboutView, footer);
+        layout.getStyleClass().add("dialog-container");
+
+        Scene sc = new Scene(layout, 560, 440);
+        ThemeManager.applyTheme(sc);
+        dlg.setScene(sc);
+        dlg.show();
+    }
+
+    private void showCertificateDetails(Stage owner, ManagedCertificate cert) {
+        CertificateDetailsDialog dialog = new CertificateDetailsDialog(owner, cert);
+        dialog.show();
+    }
+
+    private void handleAddA1Certificate(Stage owner) {
+        FileChooser fileChooser = new FileChooser();
+        fileChooser.setTitle("Selecionar Certificado Digital A1 (.pfx, .p12)");
+        fileChooser.getExtensionFilters().addAll(
+                new FileChooser.ExtensionFilter("Certificados Digitais PKCS#12 (*.pfx, *.p12)", "*.pfx", "*.p12"),
+                new FileChooser.ExtensionFilter("Todos os Arquivos (*.*)", "*.*")
+        );
+
+        File selectedFile = fileChooser.showOpenDialog(owner);
+        if (selectedFile == null) {
+            logger.info("Seleção de certificado A1 cancelada pelo usuário.");
+            return;
+        }
+
+        A1PasswordDialog pwdDialog = new A1PasswordDialog(owner, selectedFile.getName());
+        pwdDialog.showAndAwait().thenAccept(password -> {
+            if (password == null) {
+                logger.info("Importação de certificado A1 cancelada na etapa de senha.");
+                return;
+            }
+
+            try {
+                byte[] pfxData = Files.readAllBytes(selectedFile.toPath());
+                String providerId = "provider-a1-" + Integer.toHexString(selectedFile.getAbsolutePath().hashCode());
+                Pkcs12CertificateProvider a1Provider = new Pkcs12CertificateProvider(providerId, selectedFile.getName());
+
+                a1Provider.loadFromBytes(pfxData, password);
+
+                // Limpa senha da memória
+                Arrays.fill(password, ' ');
+
+                certificateManager.registerProvider(a1Provider);
+                refreshCertificates();
+
+                Platform.runLater(() -> {
+                    Alert alert = new Alert(Alert.AlertType.INFORMATION, "Certificado A1 importado com sucesso!", ButtonType.OK);
+                    alert.initOwner(owner);
+                    alert.setTitle("CyberCore Signer — Certificado A1");
+                    alert.setHeaderText("Importação Concluída");
+                    alert.show();
+                });
+
+                logger.info("Certificado A1 '{}' importado e registrado com sucesso.", selectedFile.getName());
+
+            } catch (CertificateProviderException cpe) {
+                Arrays.fill(password, ' ');
+                Platform.runLater(() -> {
+                    String msg = cpe.getErrorCode() == CcspErrorCode.PIN_INCORRECT
+                            ? "A senha informada para o certificado A1 está incorreta."
+                            : "Erro ao processar certificado: " + cpe.getMessage();
+
+                    Alert alert = new Alert(Alert.AlertType.ERROR, msg, ButtonType.OK);
+                    alert.initOwner(owner);
+                    alert.setTitle("CyberCore Signer — Erro");
+                    alert.setHeaderText("Falha na Importação");
+                    alert.show();
+                });
+            } catch (Exception e) {
+                Arrays.fill(password, ' ');
+                Platform.runLater(() -> {
+                    Alert alert = new Alert(Alert.AlertType.ERROR, "Não foi possível ler o arquivo: " + e.getMessage(), ButtonType.OK);
+                    alert.initOwner(owner);
+                    alert.setTitle("CyberCore Signer — Erro");
+                    alert.setHeaderText("Falha na Leitura");
+                    alert.show();
+                });
+            }
+        });
+    }
+
+    private void runSelfTestSignature(Stage stage) {
+        List<ManagedCertificate> available = certificateManager.getAvailableCertificates();
+        if (available.isEmpty()) {
+            logger.warn("Nenhum certificado digital disponível com chave privada para teste de assinatura.");
+            Platform.runLater(() -> {
+                Alert alert = new Alert(Alert.AlertType.WARNING,
+                        "Nenhum certificado digital disponível com chave privada para teste de assinatura.\n\n" +
+                                "Conecte um token USB/Smart Card ou importe um certificado A1.",
+                        ButtonType.OK);
+                alert.initOwner(stage);
+                alert.setTitle("CyberCore Signer — Auto-teste");
+                alert.setHeaderText("Certificado Não Encontrado");
+                alert.show();
+            });
+            return;
+        }
+
+        ManagedCertificate target = available.get(0);
+        openSignaturePrompt(stage, target);
+    }
+
+    private void openSignaturePrompt(Stage owner, ManagedCertificate cert) {
+        try {
+            byte[] docDigest = MessageDigest.getInstance("SHA-256")
+                    .digest(("Documento_Teste_CyberCore_" + Instant.now()).getBytes(StandardCharsets.UTF_8));
+
+            SigningContext context = new SigningContext(
+                    "req_test_" + System.currentTimeMillis(),
+                    "app_teste_local",
+                    docDigest,
+                    "SHA256withRSA",
+                    cert.id(),
+                    Instant.now()
+            );
+
+            SignaturePromptDialog dialog = new SignaturePromptDialog(
+                    owner, "CyberCore Agente Local", "http://localhost", cert, context
+            );
+
+            dialog.showAndAwait().thenAccept(approved -> {
+                if (Boolean.TRUE.equals(approved)) {
+                    logger.info("Usuário aprovou a assinatura para o certificado: {}", cert.alias());
+                    try {
+                        SigningResult result = signingService.sign(context);
+                        logger.info("Assinatura real gerada com sucesso! Algoritmo={}, Tamanho={}",
+                                result.algorithm(), result.signatureBytes().length);
+
+                        Platform.runLater(() -> {
+                            Alert alert = new Alert(Alert.AlertType.INFORMATION,
+                                    "Documento assinado com sucesso via " + result.algorithm() + "!\n\n" +
+                                            "Tamanho da assinatura: " + result.signatureBytes().length + " bytes\n" +
+                                            "Certificado: " + cert.commonName(),
+                                    ButtonType.OK);
+                            alert.initOwner(owner);
+                            alert.setTitle("CyberCore Signer — Sucesso");
+                            alert.setHeaderText("Assinatura Realizada");
+                            alert.show();
+                        });
+
+                    } catch (Exception e) {
+                        logger.error("Falha ao executar assinatura: {}", e.getMessage(), e);
+                        Platform.runLater(() -> {
+                            Alert alert = new Alert(Alert.AlertType.ERROR,
+                                    "Falha ao realizar assinatura digital:\n\n" + e.getMessage(),
+                                    ButtonType.OK);
+                            alert.initOwner(owner);
+                            alert.setTitle("CyberCore Signer — Erro");
+                            alert.setHeaderText("Falha na Assinatura");
+                            alert.show();
+                        });
+                    }
+                } else {
+                    logger.info("Usuário cancelou a assinatura para o certificado: {}", cert.alias());
+                }
+            });
+        } catch (Exception e) {
+            logger.error("Erro ao abrir diálogo de solicitação de assinatura: {}", e.getMessage(), e);
+        }
+    }
+
+    private void initCcspServer(Stage stage) {
+        CcspUserPromptListener promptListener = new CcspUserPromptListener() {
+            @Override
+            public CompletableFuture<Boolean> requestApplicationAuthorization(String origin, String appName, String applicationId) {
+                CompletableFuture<Boolean> future = new CompletableFuture<>();
+                Platform.runLater(() -> {
+                    try {
+                        ApplicationApprovalDialog dialog = new ApplicationApprovalDialog(stage, origin, appName, applicationId);
+                        dialog.showAndAwait().whenComplete((approved, err) -> {
+                            if (err != null) {
+                                future.complete(false);
+                            } else {
+                                future.complete(Boolean.TRUE.equals(approved));
+                            }
+                        });
+                    } catch (Exception ex) {
+                        logger.error("Erro ao abrir diálogo de autorização de aplicação: {}", ex.getMessage());
+                        future.complete(false);
+                    }
+                });
+                return future;
+            }
+
+            @Override
+            public CompletableFuture<Boolean> requestSignatureConfirmation(CcspRequest request, ManagedCertificate certificate) {
+                CompletableFuture<Boolean> future = new CompletableFuture<>();
+                Platform.runLater(() -> {
+                    try {
+                        byte[] digestBytes;
+                        if (request.digest() != null && !request.digest().isBlank()) {
+                            digestBytes = Base64.getDecoder().decode(request.digest());
+                        } else if (request.challenge() != null && !request.challenge().isBlank()) {
+                            digestBytes = MessageDigest.getInstance("SHA-256")
+                                    .digest(request.challenge().getBytes(StandardCharsets.UTF_8));
+                        } else {
+                            digestBytes = new byte[32];
+                        }
+
+                        SigningContext context = new SigningContext(
+                                request.requestId(),
+                                request.applicationId(),
+                                digestBytes,
+                                request.algorithm() != null ? request.algorithm() : "SHA256withRSA",
+                                certificate.id(),
+                                Instant.now()
+                        );
+
+                        String appName = ApplicationRegistry.getInstance().findById(request.applicationId())
+                                .map(AuthorizedApplication::name)
+                                .orElse(request.applicationId());
+
+                        SignaturePromptDialog dialog = new SignaturePromptDialog(
+                                stage, appName, "Requisição Web CCSP", certificate, context,
+                                request.documentName(), request.documentType(), request.isAuthentication()
+                        );
+                        dialog.showAndAwait().whenComplete((approved, err) -> {
+                            if (err != null) {
+                                future.complete(false);
+                            } else {
+                                future.complete(Boolean.TRUE.equals(approved));
+                            }
+                        });
+                    } catch (Exception ex) {
+                        logger.error("Erro ao abrir diálogo de confirmação de assinatura: {}", ex.getMessage());
+                        future.complete(false);
+                    }
+                });
+                return future;
+            }
+        };
+
+        try {
+            this.ccspServer = new CcspServer(this.certificateManager, this.signingService, promptListener);
+            this.ccspServer.start();
+            logger.info("Servidor local CCSP/1 inicializado na porta {}", this.ccspServer.getPort());
+        } catch (Exception e) {
+            logger.error("Falha ao inicializar servidor local CCSP/1: {}", e.getMessage(), e);
+        }
+    }
+
+    private void initSmartCardWatcher() {
+        try {
+            this.smartCardWatcher = new SmartCardWatcher();
+            this.smartCardWatcher.addListener(new SmartCardWatcher.CardEventListener() {
+                @Override
+                public void onCardInserted(String terminalName) {
+                    logger.info("Novo dispositivo detectado no terminal '{}'. Atualizando certificados...", terminalName);
+                    refreshCertificates();
+                }
+
+                @Override
+                public void onCardRemoved(String terminalName) {
+                    logger.warn("Dispositivo desconectado do terminal '{}'. Atualizando certificados...", terminalName);
+                    refreshCertificates();
+                }
+            });
+            this.smartCardWatcher.start();
+        } catch (Throwable t) {
+            logger.warn("Não foi possível iniciar monitor dinâmico de smart cards: {}", t.getMessage());
+        }
+    }
+
+    @Override
+    public void stop() {
+        logger.info("Encerrando componentes da interface JavaFX...");
+        if (smartCardWatcher != null) {
+            smartCardWatcher.stop();
+        }
+        if (systemTrayManager != null) {
+            systemTrayManager.remove();
+        }
+        if (ccspServer != null) {
+            ccspServer.stop();
+        }
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/CyberCoreUiConstants.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/CyberCoreUiConstants.java
new file mode 100644
index 0000000..ca2573f
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/CyberCoreUiConstants.java
@@ -0,0 +1,17 @@
+package br.com.cybercore.signer.ui;
+
+/**
+ * Constantes visuais e de apresentação da interface do CyberCore Signer.
+ */
+public final class CyberCoreUiConstants {
+
+    public static final String APP_NAME = "CyberCore Signer";
+    public static final String APP_VERSION = "0.1.0";
+    public static final String APP_STATUS_READY = "Serviço ativo e pronto para assinar";
+
+    // Temas e estilos
+    public static final String MAIN_CSS_PATH = "/styles/theme.css";
+
+    private CyberCoreUiConstants() {
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/assets/AssetManager.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/assets/AssetManager.java
new file mode 100644
index 0000000..b4b1cc0
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/assets/AssetManager.java
@@ -0,0 +1,449 @@
+package br.com.cybercore.signer.ui.assets;
+
+import javafx.geometry.Pos;
+import javafx.scene.Group;
+import javafx.scene.Node;
+import javafx.scene.image.Image;
+import javafx.scene.image.ImageView;
+import javafx.scene.layout.StackPane;
+import javafx.scene.paint.Color;
+import javafx.scene.shape.Circle;
+import javafx.scene.shape.Line;
+import javafx.scene.shape.Polygon;
+import javafx.scene.shape.Polyline;
+import javafx.scene.shape.Rectangle;
+import javafx.scene.shape.SVGPath;
+import javafx.scene.shape.Shape;
+import javafx.scene.text.Font;
+import javafx.scene.text.FontWeight;
+import javafx.scene.text.Text;
+import javafx.scene.transform.Scale;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.NodeList;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import java.io.ByteArrayInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.InputStream;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Optional;
+import java.util.function.Supplier;
+
+/**
+ * Gerenciador centralizado de recursos visuais (ícones e imagens).
+ * Permite que o usuário customize ou substitua facilmente qualquer ícone (SVG/PNG) ou imagem (PNG/JPG)
+ * do CyberCore Signer simplesmente colocando os arquivos na pasta 'assets/'
+ * na raiz do projeto ou no diretório ~/.cybercore/assets/.
+ */
+public final class AssetManager {
+
+    private static final Logger logger = LoggerFactory.getLogger(AssetManager.class);
+
+    private static final String[] RASTER_EXTENSIONS = {".png", ".jpg", ".jpeg"};
+
+    private AssetManager() {
+    }
+
+    /**
+     * Retorna o caminho do diretório externo prioritário de assets.
+     */
+    public static Path getExternalAssetsDir() {
+        Path localAssets = Path.of("assets");
+        if (Files.isDirectory(localAssets)) {
+            return localAssets;
+        }
+
+        String userHome = System.getProperty("user.home", ".");
+        return Path.of(userHome, ".cybercore", "assets");
+    }
+
+    /**
+     * Tenta carregar uma imagem bitmap personalizada (.png, .jpg) pelo nome nas pastas de assets
+     * ou nos recursos empacotados.
+     */
+    public static Optional<Image> loadImage(String category, String baseName, double width, double height) {
+        if (baseName == null || baseName.isBlank()) {
+            return Optional.empty();
+        }
+
+        String cleanName = cleanBaseName(baseName);
+
+        // 1. Procura no diretório local ./assets/{category}/
+        Path localDir = Path.of("assets", category);
+        for (String ext : RASTER_EXTENSIONS) {
+            Path file = localDir.resolve(cleanName + ext);
+            if (Files.isRegularFile(file)) {
+                try (InputStream in = new FileInputStream(file.toFile())) {
+                    logger.debug("Carregando imagem bitmap do diretório local: {}", file);
+                    return Optional.of(new Image(in, width, height, true, true));
+                } catch (Exception e) {
+                    logger.warn("Falha ao ler imagem customizada {}: {}", file, e.getMessage());
+                }
+            }
+        }
+
+        // 2. Procura em ~/.cybercore/assets/{category}/
+        String userHome = System.getProperty("user.home", ".");
+        Path userDir = Path.of(userHome, ".cybercore", "assets", category);
+        for (String ext : RASTER_EXTENSIONS) {
+            Path file = userDir.resolve(cleanName + ext);
+            if (Files.isRegularFile(file)) {
+                try (InputStream in = new FileInputStream(file.toFile())) {
+                    logger.debug("Carregando imagem bitmap de ~/.cybercore: {}", file);
+                    return Optional.of(new Image(in, width, height, true, true));
+                } catch (Exception e) {
+                    logger.warn("Falha ao ler imagem do usuário {}: {}", file, e.getMessage());
+                }
+            }
+        }
+
+        // 3. Procura no Classpath interno (/assets/{category}/{name})
+        for (String ext : RASTER_EXTENSIONS) {
+            String resPath = "/assets/" + category + "/" + cleanName + ext;
+            InputStream resStream = AssetManager.class.getResourceAsStream(resPath);
+            if (resStream != null) {
+                try (resStream) {
+                    return Optional.of(new Image(resStream, width, height, true, true));
+                } catch (Exception e) {
+                    logger.warn("Falha ao ler recurso interno {}: {}", resPath, e.getMessage());
+                }
+            }
+        }
+
+        return Optional.empty();
+    }
+
+    /**
+     * Retorna um Node de ícone customizado (SVG ou PNG) ou invoca o fallback caso não exista imagem customizada.
+     */
+    public static Node getIconOrDefault(String iconName, double size, Supplier<Node> fallbackSupplier) {
+        if (iconName != null && !iconName.isBlank()) {
+            String cleanName = cleanBaseName(iconName);
+
+            // 1. Prioridade para SVG em ./assets/icons/
+            Optional<Node> localSvg = loadSvgIconFromPath(Path.of("assets", "icons", cleanName + ".svg"), size);
+            if (localSvg.isPresent()) {
+                return localSvg.get();
+            }
+
+            // 2. Procura SVG em ~/.cybercore/assets/icons/
+            String userHome = System.getProperty("user.home", ".");
+            Optional<Node> userSvg = loadSvgIconFromPath(Path.of(userHome, ".cybercore", "assets", "icons", cleanName + ".svg"), size);
+            if (userSvg.isPresent()) {
+                return userSvg.get();
+            }
+
+            // 3. Se não houver SVG, tenta imagem bitmap (.png, .jpg) nas pastas externas
+            Optional<Image> customImg = loadImage("icons", cleanName, size, size);
+            if (customImg.isPresent() && !customImg.get().isError()) {
+                ImageView iv = new ImageView(customImg.get());
+                iv.setFitWidth(size);
+                iv.setFitHeight(size);
+                iv.setPreserveRatio(true);
+                return iv;
+            }
+        }
+
+        return fallbackSupplier != null ? fallbackSupplier.get() : new ImageView();
+    }
+
+    /**
+     * Retorna a imagem do logotipo do sistema ou o fallback vetorial.
+     */
+    public static Node getLogoOrDefault(double width, double height, Supplier<Node> fallbackSupplier) {
+        // Tenta carregar app-logo bitmap (.png) primeiro
+        Optional<Image> customLogo = loadImage("images", "app-logo", width, height);
+        if (customLogo.isPresent() && !customLogo.get().isError()) {
+            ImageView iv = new ImageView(customLogo.get());
+            iv.setFitWidth(width);
+            iv.setFitHeight(height);
+            iv.setPreserveRatio(true);
+            return iv;
+        }
+
+        // Tenta carregar SVG de app-logo se existir
+        Optional<Node> svgLogo = loadSvgIconFromPath(Path.of("assets", "images", "app-logo.svg"), height);
+        if (svgLogo.isPresent()) {
+            return svgLogo.get();
+        }
+
+        return fallbackSupplier != null ? fallbackSupplier.get() : new ImageView();
+    }
+
+    private static String cleanBaseName(String name) {
+        String clean = name;
+        int dotIdx = clean.lastIndexOf('.');
+        if (dotIdx > 0) {
+            clean = clean.substring(0, dotIdx);
+        }
+        return clean;
+    }
+
+    private static Optional<Node> loadSvgIconFromPath(Path path, double size) {
+        if (Files.isRegularFile(path)) {
+            try (InputStream in = new FileInputStream(path.toFile())) {
+                Node node = parseSvgToNode(in, size);
+                if (node != null) {
+                    logger.debug("Carregado ícone SVG customizado de: {}", path);
+                    return Optional.of(node);
+                }
+            } catch (Exception e) {
+                logger.warn("Falha ao carregar ícone SVG {}: {}", path, e.getMessage());
+            }
+        }
+        return Optional.empty();
+    }
+
+    /**
+     * Parser analítico leve de SVG padrão para nós gráficos JavaFX com preservação geométrica exata.
+     */
+    public static Node parseSvgToNode(InputStream in, double targetSize) {
+        try {
+            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
+            dbf.setNamespaceAware(false);
+            dbf.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
+            DocumentBuilder db = dbf.newDocumentBuilder();
+            Document doc = db.parse(in);
+
+            Element svg = doc.getDocumentElement();
+            if (!"svg".equalsIgnoreCase(svg.getNodeName())) {
+                return null;
+            }
+
+            double vbMinX = 0;
+            double vbMinY = 0;
+            double vbWidth = 48;
+            double vbHeight = 48;
+
+            String viewBox = svg.getAttribute("viewBox");
+            if (viewBox != null && !viewBox.isBlank()) {
+                String[] parts = viewBox.trim().split("[,\\s]+");
+                if (parts.length >= 4) {
+                    try {
+                        vbMinX = Double.parseDouble(parts[0]);
+                        vbMinY = Double.parseDouble(parts[1]);
+                        vbWidth = Double.parseDouble(parts[2]);
+                        vbHeight = Double.parseDouble(parts[3]);
+                    } catch (NumberFormatException ignored) {
+                    }
+                }
+            } else {
+                String wAttr = svg.getAttribute("width");
+                String hAttr = svg.getAttribute("height");
+                if (!wAttr.isBlank() && !hAttr.isBlank()) {
+                    try {
+                        vbWidth = Double.parseDouble(wAttr.replaceAll("[^0-9.]", ""));
+                        vbHeight = Double.parseDouble(hAttr.replaceAll("[^0-9.]", ""));
+                    } catch (NumberFormatException ignored) {
+                    }
+                }
+            }
+
+            if (vbWidth <= 0) vbWidth = 48;
+            if (vbHeight <= 0) vbHeight = 48;
+
+            Group contentGroup = new Group();
+            renderChildren(svg, contentGroup);
+
+            double maxDim = Math.max(vbWidth, vbHeight);
+            double scale = (targetSize * 0.90) / maxDim;
+
+            double drawnW = vbWidth * scale;
+            double drawnH = vbHeight * scale;
+            double tx = (targetSize - drawnW) / 2.0 - (vbMinX * scale);
+            double ty = (targetSize - drawnH) / 2.0 - (vbMinY * scale);
+
+            contentGroup.getTransforms().setAll(
+                    new javafx.scene.transform.Translate(tx, ty),
+                    new javafx.scene.transform.Scale(scale, scale, 0, 0)
+            );
+
+            StackPane container = new StackPane(contentGroup);
+            container.setPrefSize(targetSize, targetSize);
+            container.setMaxSize(targetSize, targetSize);
+            container.setMinSize(targetSize, targetSize);
+            container.setAlignment(Pos.CENTER);
+            return container;
+
+        } catch (Exception e) {
+            logger.warn("Erro ao parsear arquivo SVG: {}", e.getMessage());
+            return null;
+        }
+    }
+
+    private static void renderChildren(Element parent, Group targetGroup) {
+        NodeList children = parent.getChildNodes();
+        for (int i = 0; i < children.getLength(); i++) {
+            org.w3c.dom.Node n = children.item(i);
+            if (n instanceof Element el) {
+                Node jfxNode = createElementNode(el);
+                if (jfxNode != null) {
+                    targetGroup.getChildren().add(jfxNode);
+                }
+            }
+        }
+    }
+
+    private static Node createElementNode(Element el) {
+        String tagName = el.getTagName().toLowerCase();
+        Shape shape = null;
+
+        switch (tagName) {
+            case "path" -> {
+                String d = el.getAttribute("d");
+                if (!d.isBlank()) {
+                    SVGPath p = new SVGPath();
+                    p.setContent(d);
+                    shape = p;
+                }
+            }
+            case "rect" -> {
+                double x = parseDouble(el.getAttribute("x"), 0);
+                double y = parseDouble(el.getAttribute("y"), 0);
+                double w = parseDouble(el.getAttribute("width"), 0);
+                double h = parseDouble(el.getAttribute("height"), 0);
+                double rx = parseDouble(el.getAttribute("rx"), 0);
+                Rectangle r = new Rectangle(x, y, w, h);
+                if (rx > 0) {
+                    r.setArcWidth(rx * 2);
+                    r.setArcHeight(rx * 2);
+                }
+                shape = r;
+            }
+            case "circle" -> {
+                double cx = parseDouble(el.getAttribute("cx"), 0);
+                double cy = parseDouble(el.getAttribute("cy"), 0);
+                double rad = parseDouble(el.getAttribute("r"), 0);
+                shape = new Circle(cx, cy, rad);
+            }
+            case "line" -> {
+                double x1 = parseDouble(el.getAttribute("x1"), 0);
+                double y1 = parseDouble(el.getAttribute("y1"), 0);
+                double x2 = parseDouble(el.getAttribute("x2"), 0);
+                double y2 = parseDouble(el.getAttribute("y2"), 0);
+                shape = new Line(x1, y1, x2, y2);
+            }
+            case "polygon" -> {
+                String pts = el.getAttribute("points");
+                if (!pts.isBlank()) {
+                    Polygon poly = new Polygon();
+                    parsePoints(pts, poly.getPoints());
+                    shape = poly;
+                }
+            }
+            case "polyline" -> {
+                String pts = el.getAttribute("points");
+                if (!pts.isBlank()) {
+                    Polyline poly = new Polyline();
+                    parsePoints(pts, poly.getPoints());
+                    shape = poly;
+                }
+            }
+            case "text" -> {
+                double x = parseDouble(el.getAttribute("x"), 0);
+                double y = parseDouble(el.getAttribute("y"), 0);
+                String content = el.getTextContent();
+                Text t = new Text(x, y, content);
+                double fs = parseDouble(el.getAttribute("font-size"), 10);
+                String fw = el.getAttribute("font-weight");
+                t.setFont(Font.font("Segoe UI", "bold".equalsIgnoreCase(fw) ? FontWeight.BOLD : FontWeight.NORMAL, fs));
+                if (el.hasAttribute("fill")) {
+                    t.setFill(parseColor(el.getAttribute("fill"), Color.BLACK));
+                }
+                if ("middle".equalsIgnoreCase(el.getAttribute("text-anchor"))) {
+                    t.setTextOrigin(javafx.geometry.VPos.CENTER);
+                }
+                return t;
+            }
+            case "g" -> {
+                Group g = new Group();
+                renderChildren(el, g);
+                if (el.hasAttribute("stroke")) {
+                    Color strokeCol = parseColor(el.getAttribute("stroke"), null);
+                    double sw = parseDouble(el.getAttribute("stroke-width"), 1.0);
+                    for (Node child : g.getChildren()) {
+                        if (child instanceof Shape s) {
+                            if (strokeCol != null) s.setStroke(strokeCol);
+                            s.setStrokeWidth(sw);
+                        }
+                    }
+                }
+                return g;
+            }
+        }
+
+        if (shape != null) {
+            applyShapeStyles(el, shape);
+            return shape;
+        }
+
+        return null;
+    }
+
+    private static void applyShapeStyles(Element el, Shape shape) {
+        if (el.hasAttribute("fill")) {
+            shape.setFill(parseColor(el.getAttribute("fill"), Color.TRANSPARENT));
+        } else if (shape instanceof Line) {
+            shape.setFill(Color.TRANSPARENT);
+        }
+
+        if (el.hasAttribute("stroke")) {
+            shape.setStroke(parseColor(el.getAttribute("stroke"), Color.TRANSPARENT));
+        }
+
+        if (el.hasAttribute("stroke-width")) {
+            shape.setStrokeWidth(parseDouble(el.getAttribute("stroke-width"), 1.0));
+        }
+
+        if (el.hasAttribute("fill-rule") && shape instanceof SVGPath sp) {
+            if ("evenodd".equalsIgnoreCase(el.getAttribute("fill-rule"))) {
+                sp.setFillRule(javafx.scene.shape.FillRule.EVEN_ODD);
+            }
+        }
+    }
+
+    private static void parsePoints(String ptsStr, java.util.List<Double> pointsList) {
+        String[] tokens = ptsStr.trim().split("[,\\s]+");
+        for (String t : tokens) {
+            if (!t.isBlank()) {
+                try {
+                    pointsList.add(Double.parseDouble(t));
+                } catch (NumberFormatException ignored) {
+                }
+            }
+        }
+    }
+
+    private static Color parseColor(String str, Color fallback) {
+        if (str == null || str.isBlank() || "none".equalsIgnoreCase(str)) {
+            return Color.TRANSPARENT;
+        }
+        String trimmed = str.trim();
+        if ("currentColor".equalsIgnoreCase(trimmed)) {
+            return Color.web("#0288d1");
+        }
+        try {
+            return Color.web(trimmed);
+        } catch (Exception e) {
+            return fallback != null ? fallback : Color.BLACK;
+        }
+    }
+
+    private static double parseDouble(String str, double defaultValue) {
+        if (str == null || str.isBlank()) {
+            return defaultValue;
+        }
+        try {
+            return Double.parseDouble(str.replaceAll("[^0-9.-]", ""));
+        } catch (Exception e) {
+            return defaultValue;
+        }
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/components/CertificateCardNode.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/components/CertificateCardNode.java
new file mode 100644
index 0000000..e4273e8
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/components/CertificateCardNode.java
@@ -0,0 +1,129 @@
+package br.com.cybercore.signer.ui.components;
+
+import br.com.cybercore.signer.core.domain.CertificateStatus;
+import br.com.cybercore.signer.core.domain.CertificateType;
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.control.Label;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.VBox;
+
+import java.time.ZoneId;
+import java.time.format.DateTimeFormatter;
+
+/**
+ * Componente visual reutilizável para exibição de um certificado digital.
+ */
+@SuppressWarnings("this-escape")
+public final class CertificateCardNode extends VBox {
+
+    private static final DateTimeFormatter DATE_FORMATTER = DateTimeFormatter.ofPattern("dd/MM/yyyy")
+            .withZone(ZoneId.systemDefault());
+
+    private final ManagedCertificate certificate;
+
+    public CertificateCardNode(ManagedCertificate certificate) {
+        this.certificate = certificate;
+        initLayout();
+    }
+
+    private void initLayout() {
+        getStyleClass().add("cert-card");
+        setCursor(javafx.scene.Cursor.HAND);
+        setSpacing(8);
+
+        // Linha 1: Nome do Titular e Badge A1/A3
+        HBox topRow = new HBox(10);
+        topRow.setAlignment(Pos.CENTER_LEFT);
+
+        Label titleLabel = new Label(certificate.commonName() != null ? certificate.commonName() : certificate.alias());
+        titleLabel.getStyleClass().add("cert-title");
+        HBox.setHgrow(titleLabel, Priority.ALWAYS);
+
+        Label badgeLabel = new Label();
+        if (certificate.type() == CertificateType.A1) {
+            badgeLabel.setText("A1 • Certificado local");
+            badgeLabel.getStyleClass().add("cert-badge-a1");
+        } else {
+            String tokenDesc = certificate.hardwareDeviceName() != null ? certificate.hardwareDeviceName() : "Token USB";
+            badgeLabel.setText("A3 • " + tokenDesc);
+            badgeLabel.getStyleClass().add("cert-badge-a3");
+        }
+
+        topRow.getChildren().addAll(titleLabel, badgeLabel);
+
+        // Linha 2: Documento (CPF / CNPJ) e Emissor
+        HBox midRow = new HBox(12);
+        midRow.setAlignment(Pos.CENTER_LEFT);
+
+        if (certificate.cpf() != null) {
+            Label docLabel = new Label("CPF: " + formatCpf(certificate.cpf()));
+            docLabel.getStyleClass().add("cert-detail");
+            midRow.getChildren().add(docLabel);
+        } else if (certificate.cnpj() != null) {
+            Label docLabel = new Label("CNPJ: " + formatCnpj(certificate.cnpj()));
+            docLabel.getStyleClass().add("cert-detail");
+            midRow.getChildren().add(docLabel);
+        }
+
+        String issuerCn = extractIssuerCn(certificate.issuerDn());
+        Label issuerLabel = new Label("Emissor: " + issuerCn);
+        issuerLabel.getStyleClass().add("cert-detail");
+        midRow.getChildren().add(issuerLabel);
+
+        // Linha 3: Validade e Status de disponibilidade
+        HBox bottomRow = new HBox(12);
+        bottomRow.setAlignment(Pos.CENTER_LEFT);
+
+        String validityText = "Válido até " + (certificate.notAfter() != null ? DATE_FORMATTER.format(certificate.notAfter()) : "N/D");
+        Label validityLabel = new Label(validityText);
+        validityLabel.getStyleClass().add("cert-detail");
+        HBox.setHgrow(validityLabel, Priority.ALWAYS);
+
+        Label statusLabel = new Label();
+        if (certificate.status() == CertificateStatus.AVAILABLE && certificate.isCurrentlyValid()) {
+            statusLabel.setText("● Disponível");
+            statusLabel.getStyleClass().add("cert-status-available");
+        } else {
+            statusLabel.setText("● " + certificate.status().getDescription());
+            statusLabel.getStyleClass().add("cert-status-expired");
+        }
+
+        bottomRow.getChildren().addAll(validityLabel, statusLabel);
+
+        getChildren().addAll(topRow, midRow, bottomRow);
+    }
+
+    public ManagedCertificate getCertificate() {
+        return certificate;
+    }
+
+    private String formatCpf(String cpf) {
+        if (cpf != null && cpf.length() == 11) {
+            return cpf.substring(0, 3) + "." + cpf.substring(3, 6) + "." + cpf.substring(6, 9) + "-" + cpf.substring(9);
+        }
+        return cpf;
+    }
+
+    private String formatCnpj(String cnpj) {
+        if (cnpj != null && cnpj.length() == 14) {
+            return cnpj.substring(0, 2) + "." + cnpj.substring(2, 5) + "." + cnpj.substring(5, 8) + "/" + cnpj.substring(8, 12) + "-" + cnpj.substring(12);
+        }
+        return cnpj;
+    }
+
+    private String extractIssuerCn(String dn) {
+        if (dn == null) return "Desconhecido";
+        int idx = dn.indexOf("CN=");
+        if (idx >= 0) {
+            int end = dn.indexOf(',', idx);
+            if (end > idx) {
+                return dn.substring(idx + 3, end).trim();
+            }
+            return dn.substring(idx + 3).trim();
+        }
+        return dn;
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/components/SvgIcons.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/components/SvgIcons.java
new file mode 100644
index 0000000..acb5e1d
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/components/SvgIcons.java
@@ -0,0 +1,732 @@
+package br.com.cybercore.signer.ui.components;
+
+import br.com.cybercore.signer.ui.assets.AssetManager;
+import javafx.geometry.Pos;
+import javafx.scene.Group;
+import javafx.scene.Node;
+import javafx.scene.effect.DropShadow;
+import javafx.scene.layout.StackPane;
+import javafx.scene.paint.Color;
+import javafx.scene.paint.CycleMethod;
+import javafx.scene.paint.LinearGradient;
+import javafx.scene.paint.Stop;
+import javafx.scene.shape.Circle;
+import javafx.scene.shape.Polygon;
+import javafx.scene.shape.Rectangle;
+import javafx.scene.shape.SVGPath;
+import javafx.scene.text.Font;
+import javafx.scene.text.FontWeight;
+import javafx.scene.text.Text;
+
+/**
+ * Fábrica de ícones e grafismos vetoriais SVG nítidos e escaláveis para a interface Serpro do CyberCore Signer.
+ * Integra-se ao AssetManager para carregar dinamicamente arquivos .svg ou .png da pasta 'assets/icons/'.
+ */
+public final class SvgIcons {
+
+    private SvgIcons() {
+    }
+
+    /**
+     * Logotipo central de cristal/diamante azul tridimensional.
+     */
+    public static Node createAppCrystalLogo(double size) {
+        return AssetManager.getIconOrDefault("app-icon", size, () -> buildAppCrystalLogo(size));
+    }
+
+    public static Node buildAppCrystalLogo(double size) {
+        StackPane root = new StackPane();
+        root.setPrefSize(size, size);
+        root.setMaxSize(size, size);
+
+        Rectangle bg = new Rectangle(size, size);
+        bg.setArcWidth(size * 0.35);
+        bg.setArcHeight(size * 0.35);
+        LinearGradient bgGrad = new LinearGradient(
+                0, 0, 1, 1, true, CycleMethod.NO_CYCLE,
+                new Stop(0, Color.web("#1976d2")),
+                new Stop(0.5, Color.web("#0d47a1")),
+                new Stop(1, Color.web("#01579b"))
+        );
+        bg.setFill(bgGrad);
+
+        double s = size;
+        Polygon facetTop = new Polygon(
+                s * 0.5, s * 0.15,
+                s * 0.82, s * 0.42,
+                s * 0.5, s * 0.55,
+                s * 0.18, s * 0.42
+        );
+        facetTop.setFill(new LinearGradient(
+                0, 0, 0, 1, true, CycleMethod.NO_CYCLE,
+                new Stop(0, Color.web("#ffffff", 0.85)),
+                new Stop(1, Color.web("#80d8ff", 0.4))
+        ));
+
+        Polygon facetBottomLeft = new Polygon(
+                s * 0.18, s * 0.42,
+                s * 0.5, s * 0.55,
+                s * 0.5, s * 0.85,
+                s * 0.28, s * 0.70
+        );
+        facetBottomLeft.setFill(new LinearGradient(
+                0, 0, 1, 1, true, CycleMethod.NO_CYCLE,
+                new Stop(0, Color.web("#40c4ff", 0.6)),
+                new Stop(1, Color.web("#0288d1", 0.2))
+        ));
+
+        Polygon facetBottomRight = new Polygon(
+                s * 0.82, s * 0.42,
+                s * 0.5, s * 0.55,
+                s * 0.5, s * 0.85,
+                s * 0.72, s * 0.70
+        );
+        facetBottomRight.setFill(new LinearGradient(
+                1, 0, 0, 1, true, CycleMethod.NO_CYCLE,
+                new Stop(0, Color.web("#e1f5fe", 0.75)),
+                new Stop(1, Color.web("#29b6f6", 0.3))
+        ));
+
+        Circle glow = new Circle(s * 0.5, s * 0.5, s * 0.12);
+        glow.setFill(new LinearGradient(
+                0, 0, 1, 1, true, CycleMethod.NO_CYCLE,
+                new Stop(0, Color.web("#ffffff", 0.9)),
+                new Stop(1, Color.web("#ffffff", 0.0))
+        ));
+
+        Group crystal = new Group(bg, facetTop, facetBottomLeft, facetBottomRight, glow);
+        DropShadow shadow = new DropShadow();
+        shadow.setColor(Color.web("#0d47a1", 0.4));
+        shadow.setRadius(12);
+        shadow.setOffsetY(4);
+        crystal.setEffect(shadow);
+
+        root.getChildren().add(crystal);
+        return root;
+    }
+
+    /**
+     * Ícone de Assinar PDF.
+     */
+    public static Node pdfIcon() {
+        return AssetManager.getIconOrDefault("pdf", 38, SvgIcons::buildPdfIcon);
+    }
+
+    public static Node buildPdfIcon() {
+        StackPane box = new StackPane();
+        box.setPrefSize(38, 38);
+
+        SVGPath doc = new SVGPath();
+        doc.setContent("M 6 2 L 24 2 L 32 10 L 32 36 L 6 36 Z");
+        doc.setFill(Color.web("#ffffff"));
+        doc.setStroke(Color.web("#d32f2f"));
+        doc.setStrokeWidth(1.8);
+
+        SVGPath fold = new SVGPath();
+        fold.setContent("M 24 2 L 24 10 L 32 10 Z");
+        fold.setFill(Color.web("#ffcdd2"));
+        fold.setStroke(Color.web("#d32f2f"));
+        fold.setStrokeWidth(1.2);
+
+        Rectangle tag = new Rectangle(20, 10);
+        tag.setArcWidth(4);
+        tag.setArcHeight(4);
+        tag.setFill(Color.web("#e53935"));
+        tag.setTranslateY(4);
+
+        Text txt = new Text("PDF");
+        txt.setFont(Font.font("Segoe UI", FontWeight.BOLD, 7.5));
+        txt.setFill(Color.WHITE);
+        txt.setTranslateY(4);
+
+        box.getChildren().addAll(doc, fold, tag, txt);
+        return box;
+    }
+
+    /**
+     * Ícone de Assinar XML.
+     */
+    public static Node xmlIcon() {
+        return AssetManager.getIconOrDefault("xml", 38, SvgIcons::buildXmlIcon);
+    }
+
+    public static Node buildXmlIcon() {
+        StackPane box = new StackPane();
+        box.setPrefSize(38, 38);
+
+        SVGPath doc = new SVGPath();
+        doc.setContent("M 6 2 L 24 2 L 32 10 L 32 36 L 6 36 Z");
+        doc.setFill(Color.web("#ffffff"));
+        doc.setStroke(Color.web("#1976d2"));
+        doc.setStrokeWidth(1.8);
+
+        SVGPath fold = new SVGPath();
+        fold.setContent("M 24 2 L 24 10 L 32 10 Z");
+        fold.setFill(Color.web("#bbdefb"));
+        fold.setStroke(Color.web("#1976d2"));
+        fold.setStrokeWidth(1.2);
+
+        Rectangle tag = new Rectangle(22, 10);
+        tag.setArcWidth(4);
+        tag.setArcHeight(4);
+        tag.setFill(Color.web("#0288d1"));
+        tag.setTranslateY(4);
+
+        Text txt = new Text("<XML>");
+        txt.setFont(Font.font("Segoe UI", FontWeight.BOLD, 6.8));
+        txt.setFill(Color.WHITE);
+        txt.setTranslateY(4);
+
+        box.getChildren().addAll(doc, fold, tag, txt);
+        return box;
+    }
+
+    /**
+     * Ícone de Assinar Arquivo genérico.
+     */
+    public static Node fileIcon() {
+        return AssetManager.getIconOrDefault("file", 38, SvgIcons::buildFileIcon);
+    }
+
+    public static Node buildFileIcon() {
+        StackPane box = new StackPane();
+        box.setPrefSize(38, 38);
+
+        SVGPath doc = new SVGPath();
+        doc.setContent("M 6 2 L 24 2 L 32 10 L 32 36 L 6 36 Z");
+        doc.setFill(Color.web("#ffffff"));
+        doc.setStroke(Color.web("#0288d1"));
+        doc.setStrokeWidth(1.8);
+
+        SVGPath fold = new SVGPath();
+        fold.setContent("M 24 2 L 24 10 L 32 10 Z");
+        fold.setFill(Color.web("#b3e5fc"));
+        fold.setStroke(Color.web("#0288d1"));
+        fold.setStrokeWidth(1.2);
+
+        SVGPath pen = new SVGPath();
+        pen.setContent("M 10 24 L 22 12 L 26 16 L 14 28 L 8 29 Z");
+        pen.setFill(Color.web("#0288d1"));
+
+        box.getChildren().addAll(doc, fold, pen);
+        return box;
+    }
+
+    /**
+     * Ícone de Assinar em Lote.
+     */
+    public static Node batchIcon() {
+        return AssetManager.getIconOrDefault("batch", 38, SvgIcons::buildBatchIcon);
+    }
+
+    public static Node buildBatchIcon() {
+        StackPane box = new StackPane();
+        box.setPrefSize(38, 38);
+
+        SVGPath doc3 = new SVGPath();
+        doc3.setContent("M 12 2 L 30 2 L 30 26 L 12 26 Z");
+        doc3.setFill(Color.web("#e1f5fe"));
+        doc3.setStroke(Color.web("#4fc3f7"));
+        doc3.setStrokeWidth(1.2);
+        doc3.setTranslateX(4);
+        doc3.setTranslateY(-4);
+
+        SVGPath doc2 = new SVGPath();
+        doc2.setContent("M 8 6 L 28 6 L 28 30 L 8 30 Z");
+        doc2.setFill(Color.web("#b3e5fc"));
+        doc2.setStroke(Color.web("#0288d1"));
+        doc2.setStrokeWidth(1.4);
+        doc2.setTranslateX(2);
+        doc2.setTranslateY(-2);
+
+        SVGPath doc1 = new SVGPath();
+        doc1.setContent("M 4 10 L 24 10 L 24 34 L 4 34 Z");
+        doc1.setFill(Color.web("#ffffff"));
+        doc1.setStroke(Color.web("#01579b"));
+        doc1.setStrokeWidth(1.6);
+
+        SVGPath check = new SVGPath();
+        check.setContent("M 8 22 L 13 27 L 21 16");
+        check.setStroke(Color.web("#00c853"));
+        check.setStrokeWidth(2.2);
+        check.setFill(Color.TRANSPARENT);
+
+        box.getChildren().addAll(doc3, doc2, doc1, check);
+        return box;
+    }
+
+    /**
+     * Ícone de Assinatura Atachada.
+     */
+    public static Node attachedIcon() {
+        return AssetManager.getIconOrDefault("attached", 38, SvgIcons::buildAttachedIcon);
+    }
+
+    public static Node buildAttachedIcon() {
+        StackPane box = new StackPane();
+        box.setPrefSize(38, 38);
+
+        SVGPath doc = new SVGPath();
+        doc.setContent("M 8 4 L 28 4 L 28 34 L 8 34 Z");
+        doc.setFill(Color.web("#ffffff"));
+        doc.setStroke(Color.web("#0288d1"));
+        doc.setStrokeWidth(1.6);
+
+        SVGPath lines = new SVGPath();
+        lines.setContent("M 12 12 L 24 12 M 12 17 L 24 17 M 12 22 L 20 22");
+        lines.setStroke(Color.web("#90caf9"));
+        lines.setStrokeWidth(1.4);
+
+        SVGPath clip = new SVGPath();
+        clip.setContent("M 10 2 C 7 2 6 5 6 8 L 6 20 C 6 23 8 25 11 25 C 14 25 16 23 16 20 L 16 9 C 16 7 15 6 13 6 C 11 6 10 7 10 9 L 10 19");
+        clip.setFill(Color.TRANSPARENT);
+        clip.setStroke(Color.web("#546e7a"));
+        clip.setStrokeWidth(1.8);
+        clip.setTranslateX(-8);
+        clip.setTranslateY(-4);
+
+        box.getChildren().addAll(doc, lines, clip);
+        return box;
+    }
+
+    /**
+     * Ícone de Co-Assinar.
+     */
+    public static Node coSignIcon() {
+        return AssetManager.getIconOrDefault("co-sign", 38, SvgIcons::buildCoSignIcon);
+    }
+
+    public static Node buildCoSignIcon() {
+        StackPane box = new StackPane();
+        box.setPrefSize(38, 38);
+
+        SVGPath doc1 = new SVGPath();
+        doc1.setContent("M 4 8 L 22 8 L 22 32 L 4 32 Z");
+        doc1.setFill(Color.web("#ffffff"));
+        doc1.setStroke(Color.web("#1976d2"));
+        doc1.setStrokeWidth(1.5);
+
+        SVGPath doc2 = new SVGPath();
+        doc2.setContent("M 14 4 L 32 4 L 32 28 L 14 28 Z");
+        doc2.setFill(Color.web("#e3f2fd"));
+        doc2.setStroke(Color.web("#0288d1"));
+        doc2.setStrokeWidth(1.5);
+
+        SVGPath people = new SVGPath();
+        people.setContent("M 10 26 C 10 22 14 22 16 22 C 18 22 22 22 22 26 M 16 17 C 14.5 17 14.5 14 16 14 C 17.5 14 17.5 17 16 17");
+        people.setStroke(Color.web("#0d47a1"));
+        people.setStrokeWidth(1.6);
+        people.setFill(Color.TRANSPARENT);
+
+        box.getChildren().addAll(doc2, doc1, people);
+        return box;
+    }
+
+    /**
+     * Ícone de Carimbo do Tempo.
+     */
+    public static Node timestampIcon() {
+        return AssetManager.getIconOrDefault("timestamp", 38, SvgIcons::buildTimestampIcon);
+    }
+
+    public static Node buildTimestampIcon() {
+        StackPane box = new StackPane();
+        box.setPrefSize(38, 38);
+
+        SVGPath doc = new SVGPath();
+        doc.setContent("M 6 2 L 24 2 L 32 10 L 32 34 L 6 34 Z");
+        doc.setFill(Color.web("#ffffff"));
+        doc.setStroke(Color.web("#0288d1"));
+        doc.setStrokeWidth(1.5);
+
+        Circle clockBg = new Circle(18, 24, 9);
+        clockBg.setFill(Color.web("#e1f5fe"));
+        clockBg.setStroke(Color.web("#0288d1"));
+        clockBg.setStrokeWidth(1.6);
+
+        SVGPath clockHands = new SVGPath();
+        clockHands.setContent("M 18 19 L 18 24 L 22 24");
+        clockHands.setStroke(Color.web("#01579b"));
+        clockHands.setStrokeWidth(1.6);
+        clockHands.setFill(Color.TRANSPARENT);
+
+        box.getChildren().addAll(doc, clockBg, clockHands);
+        return box;
+    }
+
+    /**
+     * Ícone de Assinatura de Longa Duração (LTV).
+     */
+    public static Node ltvIcon() {
+        return AssetManager.getIconOrDefault("ltv", 38, SvgIcons::buildLtvIcon);
+    }
+
+    public static Node buildLtvIcon() {
+        StackPane box = new StackPane();
+        box.setPrefSize(38, 38);
+
+        SVGPath doc = new SVGPath();
+        doc.setContent("M 6 2 L 24 2 L 32 10 L 32 34 L 6 34 Z");
+        doc.setFill(Color.web("#ffffff"));
+        doc.setStroke(Color.web("#00838f"));
+        doc.setStrokeWidth(1.5);
+
+        Circle shield = new Circle(20, 24, 8);
+        shield.setFill(Color.web("#e0f2f1"));
+        shield.setStroke(Color.web("#00897b"));
+        shield.setStrokeWidth(1.6);
+
+        Text ltv = new Text("LTV");
+        ltv.setFont(Font.font("Segoe UI", FontWeight.BOLD, 6.8));
+        ltv.setFill(Color.web("#00695c"));
+        ltv.setTranslateX(2);
+        ltv.setTranslateY(6);
+
+        box.getChildren().addAll(doc, shield, ltv);
+        return box;
+    }
+
+    /**
+     * Ícone de Validar Assinatura.
+     */
+    public static Node validateIcon() {
+        return AssetManager.getIconOrDefault("validate", 38, SvgIcons::buildValidateIcon);
+    }
+
+    public static Node buildValidateIcon() {
+        StackPane box = new StackPane();
+        box.setPrefSize(38, 38);
+
+        SVGPath doc = new SVGPath();
+        doc.setContent("M 6 4 L 26 4 L 26 34 L 6 34 Z");
+        doc.setFill(Color.web("#ffffff"));
+        doc.setStroke(Color.web("#0288d1"));
+        doc.setStrokeWidth(1.5);
+
+        SVGPath check = new SVGPath();
+        check.setContent("M 8 20 L 16 28 L 32 10");
+        check.setStroke(Color.web("#2e7d32"));
+        check.setStrokeWidth(2.6);
+        check.setFill(Color.TRANSPARENT);
+
+        box.getChildren().addAll(doc, check);
+        return box;
+    }
+
+    /**
+     * Ícone de Validar Carimbo do Tempo.
+     */
+    public static Node validateTimestampIcon() {
+        return AssetManager.getIconOrDefault("validate-timestamp", 38, SvgIcons::buildValidateTimestampIcon);
+    }
+
+    public static Node buildValidateTimestampIcon() {
+        StackPane box = new StackPane();
+        box.setPrefSize(38, 38);
+
+        Circle clock = new Circle(16, 16, 12);
+        clock.setFill(Color.web("#f1f8e9"));
+        clock.setStroke(Color.web("#558b2f"));
+        clock.setStrokeWidth(1.6);
+
+        SVGPath check = new SVGPath();
+        check.setContent("M 10 16 L 15 21 L 24 11");
+        check.setStroke(Color.web("#2e7d32"));
+        check.setStrokeWidth(2.2);
+        check.setFill(Color.TRANSPARENT);
+
+        box.getChildren().addAll(clock, check);
+        return box;
+    }
+
+    /**
+     * Ícone de Sair do Agente.
+     */
+    public static Node exitIcon() {
+        return AssetManager.getIconOrDefault("exit", 38, SvgIcons::buildExitIcon);
+    }
+
+    public static Node buildExitIcon() {
+        StackPane box = new StackPane();
+        box.setPrefSize(38, 38);
+
+        SVGPath door = new SVGPath();
+        door.setContent("M 18 6 L 8 6 C 6.5 6 6 7.5 6 9 L 6 27 C 6 28.5 6.5 30 8 30 L 18 30");
+        door.setStroke(Color.web("#546e7a"));
+        door.setStrokeWidth(2);
+        door.setFill(Color.TRANSPARENT);
+
+        SVGPath arrow = new SVGPath();
+        arrow.setContent("M 14 18 L 30 18 M 24 12 L 30 18 L 24 24");
+        arrow.setStroke(Color.web("#d32f2f"));
+        arrow.setStrokeWidth(2);
+        arrow.setFill(Color.TRANSPARENT);
+
+        box.getChildren().addAll(door, arrow);
+        return box;
+    }
+
+    /**
+     * Ícone de Logs.
+     */
+    public static Node logsIcon() {
+        return AssetManager.getIconOrDefault("logs", 24, SvgIcons::buildLogsIcon);
+    }
+
+    public static Node buildLogsIcon() {
+        StackPane box = new StackPane();
+        box.setPrefSize(24, 24);
+
+        Text code = new Text("</>");
+        code.setFont(Font.font("Segoe UI", FontWeight.BOLD, 12));
+        code.setFill(Color.web("#0288d1"));
+
+        box.getChildren().add(code);
+        return box;
+    }
+
+    /**
+     * Ícone de Configurações.
+     */
+    public static Node settingsIcon() {
+        return AssetManager.getIconOrDefault("settings", 24, SvgIcons::buildSettingsIcon);
+    }
+
+    public static Node buildSettingsIcon() {
+        StackPane box = new StackPane();
+        box.setPrefSize(24, 24);
+
+        SVGPath gear = new SVGPath();
+        gear.setContent("M 12 1 C 11 1 10.5 2 10.5 3 C 9.5 3.3 8.6 3.8 7.8 4.5 L 6.2 3.6 C 5.5 3.2 4.6 3.5 4.1 4.1 L 2.6 6.6 C 2.1 7.2 2.3 8.1 3 8.6 L 4.4 9.6 C 4.2 10.4 4.1 11.2 4.1 12 C 4.1 12.8 4.2 13.6 4.4 14.4 L 3 15.4 C 2.3 15.9 2.1 16.8 2.6 17.4 L 4.1 19.9 C 4.6 20.5 5.5 20.8 6.2 20.4 L 7.8 19.5 C 8.6 20.2 9.5 20.7 10.5 21 C 10.5 22 11 23 12 23 C 13 23 13.5 22 13.5 21 C 14.5 20.7 15.4 20.2 16.2 19.5 L 17.8 20.4 C 18.5 20.8 19.4 20.5 19.9 19.9 L 21.4 17.4 C 21.9 16.8 21.7 15.9 21 15.4 L 19.6 14.4 C 19.8 13.6 19.9 12.8 19.9 12 C 19.9 11.2 19.8 10.4 19.6 9.6 L 21 8.6 C 21.7 8.1 21.9 7.2 21.4 6.6 L 19.9 4.1 C 19.4 3.5 18.5 3.2 17.8 3.6 L 16.2 4.5 C 15.4 3.8 14.5 3.3 13.5 3 C 13.5 2 13 1 12 1 Z M 12 8 C 14.2 8 16 9.8 16 12 C 16 14.2 14.2 16 12 16 C 9.8 16 8 14.2 8 12 C 8 9.8 9.8 8 12 8 Z");
+        gear.setFill(Color.web("#0288d1"));
+        gear.setScaleX(0.85);
+        gear.setScaleY(0.85);
+
+        box.getChildren().add(gear);
+        return box;
+    }
+
+    /**
+     * Ícone de Tutorial.
+     */
+    public static Node tutorialIcon() {
+        return AssetManager.getIconOrDefault("tutorial", 24, SvgIcons::buildTutorialIcon);
+    }
+
+    public static Node buildTutorialIcon() {
+        StackPane box = new StackPane();
+        box.setPrefSize(24, 24);
+
+        SVGPath monitor = new SVGPath();
+        monitor.setContent("M 2 4 L 22 4 L 22 17 L 2 17 Z M 8 17 L 6 21 L 18 21 L 16 17 M 12 17 L 12 21");
+        monitor.setStroke(Color.web("#0288d1"));
+        monitor.setStrokeWidth(1.6);
+        monitor.setFill(Color.TRANSPARENT);
+
+        box.getChildren().add(monitor);
+        return box;
+    }
+
+    /**
+     * Ícone de Certificados.
+     */
+    public static Node certificatesIcon() {
+        return AssetManager.getIconOrDefault("cert", 24, SvgIcons::buildCertificatesIcon);
+    }
+
+    public static Node buildCertificatesIcon() {
+        StackPane box = new StackPane();
+        box.setPrefSize(24, 24);
+
+        SVGPath folder = new SVGPath();
+        folder.setContent("M 2 5 L 8 5 L 10 7 L 22 7 L 22 20 L 2 20 Z");
+        folder.setFill(Color.web("#e1f5fe"));
+        folder.setStroke(Color.web("#0288d1"));
+        folder.setStrokeWidth(1.5);
+
+        Rectangle lock = new Rectangle(7, 6);
+        lock.setArcWidth(2);
+        lock.setArcHeight(2);
+        lock.setFill(Color.web("#0288d1"));
+        lock.setTranslateX(3);
+        lock.setTranslateY(2);
+
+        box.getChildren().addAll(folder, lock);
+        return box;
+    }
+
+    /**
+     * Ícone de Sobre.
+     */
+    public static Node aboutIcon() {
+        return AssetManager.getIconOrDefault("about", 24, SvgIcons::buildAboutIcon);
+    }
+
+    public static Node buildAboutIcon() {
+        StackPane box = new StackPane();
+        box.setPrefSize(24, 24);
+
+        Circle circle = new Circle(10);
+        circle.setFill(Color.web("#0288d1"));
+
+        Text i = new Text("i");
+        i.setFont(Font.font("Segoe UI", FontWeight.BOLD, 13));
+        i.setFill(Color.WHITE);
+
+        box.getChildren().addAll(circle, i);
+        return box;
+    }
+
+    /**
+     * Ícone de Sol (Light Mode).
+     */
+    public static Node sunIcon(double size) {
+        return AssetManager.getIconOrDefault("sun", size, () -> buildSunIcon(size));
+    }
+
+    public static Node buildSunIcon(double size) {
+        StackPane box = new StackPane();
+        box.setPrefSize(size, size);
+        box.setMaxSize(size, size);
+
+        Circle sunCore = new Circle(size * 0.5, size * 0.5, size * 0.24);
+        sunCore.setFill(new LinearGradient(
+                0, 0, 1, 1, true, CycleMethod.NO_CYCLE,
+                new Stop(0, Color.web("#f59e0b")),
+                new Stop(1, Color.web("#d97706"))
+        ));
+
+        SVGPath rays = new SVGPath();
+        rays.setContent("M 12 2 L 12 5 M 12 19 L 12 22 M 2 12 L 5 12 M 19 12 L 22 12 " +
+                "M 4.93 4.93 L 7.05 7.05 M 16.95 16.95 L 19.07 19.07 " +
+                "M 4.93 19.07 L 7.05 16.95 M 16.95 7.05 L 19.07 4.93");
+        rays.setStroke(Color.web("#f59e0b"));
+        rays.setStrokeWidth(2.0);
+        rays.setScaleX(size / 24.0);
+        rays.setScaleY(size / 24.0);
+
+        box.getChildren().addAll(rays, sunCore);
+        return box;
+    }
+
+    /**
+     * Ícone de Lua (Dark Mode).
+     */
+    public static Node moonIcon(double size) {
+        return AssetManager.getIconOrDefault("moon", size, () -> buildMoonIcon(size));
+    }
+
+    public static Node buildMoonIcon(double size) {
+        StackPane box = new StackPane();
+        box.setPrefSize(size, size);
+        box.setMaxSize(size, size);
+
+        SVGPath moon = new SVGPath();
+        moon.setContent("M 21 12.79 A 9 9 0 1 1 11.21 3 A 7 7 0 0 0 21 12.79 Z");
+        moon.setFill(new LinearGradient(
+                0, 0, 1, 1, true, CycleMethod.NO_CYCLE,
+                new Stop(0, Color.web("#38bdf8")),
+                new Stop(1, Color.web("#818cf8"))
+        ));
+        moon.setScaleX(size / 24.0);
+        moon.setScaleY(size / 24.0);
+
+        box.getChildren().add(moon);
+        return box;
+    }
+
+    /**
+     * Logotipo vetorial CyberShield.
+     */
+    public static Node cyberShieldLogo(double size) {
+        return AssetManager.getIconOrDefault("shield", size, () -> buildCyberShieldLogo(size));
+    }
+
+    public static Node buildCyberShieldLogo(double size) {
+        StackPane box = new StackPane();
+        box.setPrefSize(size, size);
+        box.setMaxSize(size, size);
+
+        SVGPath shield = new SVGPath();
+        shield.setContent("M 12 2 L 3 6 L 3 13 C 3 18.5 7 23.5 12 25 C 17 23.5 21 18.5 21 13 L 21 6 Z");
+        shield.setFill(new LinearGradient(
+                0, 0, 1, 1, true, CycleMethod.NO_CYCLE,
+                new Stop(0, Color.web("#0284c7")),
+                new Stop(0.5, Color.web("#0369a1")),
+                new Stop(1, Color.web("#075985"))
+        ));
+        shield.setStroke(Color.web("#38bdf8"));
+        shield.setStrokeWidth(1.2);
+        shield.setScaleX(size / 26.0);
+        shield.setScaleY(size / 26.0);
+
+        SVGPath key = new SVGPath();
+        key.setContent("M 12 7 C 10.3 7 9 8.3 9 10 C 9 11.3 9.8 12.4 11 12.8 L 11 18 L 13 18 L 13 15 L 14 15 L 14 13 L 13 13 L 13 12.8 C 14.2 12.4 15 11.3 15 10 C 15 8.3 13.7 7 12 7 Z M 12 9 C 12.6 9 13 9.4 13 10 C 13 10.6 12.6 11 12 11 C 11.4 11 11 10.6 11 10 C 11 9.4 11.4 9 12 9 Z");
+        key.setFill(Color.web("#ffffff"));
+        key.setScaleX(size / 26.0);
+        key.setScaleY(size / 26.0);
+
+        box.getChildren().addAll(shield, key);
+        return box;
+    }
+
+    /**
+     * Ícone de Gerenciador/Criador de Selos Visuais de Assinatura.
+     */
+    public static Node sealIcon() {
+        return AssetManager.getIconOrDefault("seal", 38, SvgIcons::buildSealIcon);
+    }
+
+    public static Node buildSealIcon() {
+        StackPane box = new StackPane();
+        box.setPrefSize(38, 38);
+
+        SVGPath ribbon = new SVGPath();
+        ribbon.setContent("M 14 26 L 19 36 L 24 26 Z M 9 26 L 12 34 L 15 26 Z");
+        ribbon.setFill(Color.web("#f59e0b"));
+
+        Circle sealCircle = new Circle(13);
+        sealCircle.setFill(Color.web("#d97706"));
+        sealCircle.setStroke(Color.web("#fbbf24"));
+        sealCircle.setStrokeWidth(1.6);
+        sealCircle.setTranslateY(-4);
+
+        SVGPath star = new SVGPath();
+        star.setContent("M 19 8 L 21 13 L 26 13 L 22 16 L 24 21 L 19 18 L 14 21 L 16 16 L 12 13 L 17 13 Z");
+        star.setFill(Color.web("#ffffff"));
+        star.setTranslateX(-9);
+        star.setTranslateY(-14);
+
+        box.getChildren().addAll(ribbon, sealCircle, star);
+        return box;
+    }
+
+    /**
+     * Ícone vetorial de Fechar / Cancelar (cruz geométrica moderna e limpa).
+     */
+    public static Node closeIcon() {
+        return closeIcon(14);
+    }
+
+    public static Node closeIcon(double size) {
+        StackPane box = new StackPane();
+        box.setPrefSize(size, size);
+        box.setMaxSize(size, size);
+        box.setMinSize(size, size);
+        box.setAlignment(Pos.CENTER);
+
+        SVGPath cross = new SVGPath();
+        cross.setContent("M 3.5 3.5 L 12.5 12.5 M 12.5 3.5 L 3.5 12.5");
+        cross.setStroke(Color.web("#64748b"));
+        cross.setStrokeWidth(2.0);
+        cross.setStrokeLineCap(javafx.scene.shape.StrokeLineCap.ROUND);
+        cross.setFill(Color.TRANSPARENT);
+
+        double scale = size / 16.0;
+        cross.setScaleX(scale);
+        cross.setScaleY(scale);
+
+        box.getChildren().add(cross);
+        return box;
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/theme/ThemeManager.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/theme/ThemeManager.java
new file mode 100644
index 0000000..f2afa93
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/theme/ThemeManager.java
@@ -0,0 +1,120 @@
+package br.com.cybercore.signer.ui.theme;
+
+import br.com.cybercore.signer.ui.CyberCoreUiConstants;
+import javafx.scene.Parent;
+import javafx.scene.Scene;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+import java.util.function.Consumer;
+
+/**
+ * Gerenciador centralizado de temas visuais do CyberCore Signer.
+ * Permite alternar dinamicamente entre Tema Claro (Light) e Tema Escuro (Dark)
+ * aplicando as classes CSS e folhas de estilo correspondentes em qualquer Scene.
+ */
+public final class ThemeManager {
+
+    public enum AppTheme {
+        LIGHT("theme-light", "Modo Claro"),
+        DARK("theme-dark", "Modo Escuro");
+
+        private final String cssClass;
+        private final String displayName;
+
+        AppTheme(String cssClass, String displayName) {
+            this.cssClass = cssClass;
+            this.displayName = displayName;
+        }
+
+        public String getCssClass() {
+            return cssClass;
+        }
+
+        public String getDisplayName() {
+            return displayName;
+        }
+    }
+
+    private static AppTheme currentTheme = AppTheme.LIGHT;
+    private static final List<Consumer<AppTheme>> listeners = new ArrayList<>();
+
+    private ThemeManager() {
+    }
+
+    public static AppTheme getCurrentTheme() {
+        return currentTheme;
+    }
+
+    public static boolean isDark() {
+        return currentTheme == AppTheme.DARK;
+    }
+
+    public static void setCurrentTheme(AppTheme theme) {
+        if (theme == null || theme == currentTheme) {
+            return;
+        }
+        currentTheme = theme;
+        notifyListeners();
+    }
+
+    public static AppTheme toggleTheme() {
+        currentTheme = (currentTheme == AppTheme.LIGHT) ? AppTheme.DARK : AppTheme.LIGHT;
+        notifyListeners();
+        return currentTheme;
+    }
+
+    /**
+     * Aplica o tema atualmente ativo a uma Scene, adicionando a folha de estilo global
+     * e ajustando a classe CSS raiz (theme-light / theme-dark).
+     */
+    public static void applyTheme(Scene scene) {
+        if (scene == null) {
+            return;
+        }
+
+        String cssUrl = Objects.requireNonNull(
+                ThemeManager.class.getResource(CyberCoreUiConstants.MAIN_CSS_PATH)
+        ).toExternalForm();
+
+        if (!scene.getStylesheets().contains(cssUrl)) {
+            scene.getStylesheets().add(cssUrl);
+        }
+
+        Parent root = scene.getRoot();
+        if (root != null) {
+            applyThemeToNode(root);
+        }
+    }
+
+    /**
+     * Aplica a classe de estilo do tema ativo no nó raiz fornecido.
+     */
+    public static void applyThemeToNode(Parent node) {
+        if (node == null) {
+            return;
+        }
+        node.getStyleClass().removeAll(AppTheme.LIGHT.getCssClass(), AppTheme.DARK.getCssClass());
+        node.getStyleClass().add(currentTheme.getCssClass());
+    }
+
+    public static void addListener(Consumer<AppTheme> listener) {
+        if (listener != null && !listeners.contains(listener)) {
+            listeners.add(listener);
+        }
+    }
+
+    public static void removeListener(Consumer<AppTheme> listener) {
+        listeners.remove(listener);
+    }
+
+    private static void notifyListeners() {
+        for (Consumer<AppTheme> listener : new ArrayList<>(listeners)) {
+            try {
+                listener.accept(currentTheme);
+            } catch (Exception ignored) {
+            }
+        }
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/tray/SystemTrayManager.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/tray/SystemTrayManager.java
new file mode 100644
index 0000000..07869b0
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/tray/SystemTrayManager.java
@@ -0,0 +1,169 @@
+package br.com.cybercore.signer.ui.tray;
+
+import javafx.application.Platform;
+import javafx.stage.Stage;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.awt.AWTException;
+import java.awt.Color;
+import java.awt.Font;
+import java.awt.Graphics2D;
+import java.awt.Image;
+import java.awt.MenuItem;
+import java.awt.PopupMenu;
+import java.awt.RenderingHints;
+import java.awt.SystemTray;
+import java.awt.TrayIcon;
+import java.awt.image.BufferedImage;
+import java.util.Objects;
+
+/**
+ * Gerencia a integração nativa com o System Tray (Área de Notificação / Bandeja do Windows).
+ * Permite que o CyberCore Signer permaneça em execução transparente em segundo plano,
+ * garantindo o atendimento ininterrupto às requisições do protocolo CCSP/1.
+ */
+public class SystemTrayManager {
+
+    private static final Logger logger = LoggerFactory.getLogger(SystemTrayManager.class);
+
+    private final Stage stage;
+    private final Runnable onRefreshCertificates;
+    private TrayIcon trayIcon;
+    private boolean initialized = false;
+
+    public SystemTrayManager(Stage stage, Runnable onRefreshCertificates) {
+        this.stage = Objects.requireNonNull(stage, "stage must not be null");
+        this.onRefreshCertificates = onRefreshCertificates;
+    }
+
+    /**
+     * Inicializa o ícone e menu de contexto na bandeja do sistema, caso haja suporte.
+     */
+    public synchronized boolean setup() {
+        if (!SystemTray.isSupported()) {
+            logger.info("SystemTray não é suportado pelo ambiente atual ou sistema operacional.");
+            return false;
+        }
+
+        try {
+            SystemTray tray = SystemTray.getSystemTray();
+            Image iconImage = createTrayIconImage();
+
+            PopupMenu popup = new PopupMenu();
+
+            MenuItem openItem = new MenuItem("Abrir CyberCore Signer");
+            openItem.addActionListener(e -> Platform.runLater(this::showStage));
+
+            MenuItem refreshItem = new MenuItem("Atualizar Certificados");
+            refreshItem.addActionListener(e -> {
+                if (onRefreshCertificates != null) {
+                    onRefreshCertificates.run();
+                }
+            });
+
+            MenuItem exitItem = new MenuItem("Encerrar Agente");
+            exitItem.addActionListener(e -> {
+                logger.info("Encerramento solicitado através do menu da bandeja.");
+                shutdown();
+            });
+
+            popup.add(openItem);
+            popup.add(refreshItem);
+            popup.addSeparator();
+            popup.add(exitItem);
+
+            this.trayIcon = new TrayIcon(iconImage, "CyberCore Signer (CCSP/1 Ativo)", popup);
+            this.trayIcon.setImageAutoSize(true);
+
+            // Clique no ícone restaura a janela
+            this.trayIcon.addActionListener(e -> Platform.runLater(this::showStage));
+
+            tray.add(this.trayIcon);
+            this.initialized = true;
+
+            // Intercepta fechamento da janela para ocultar em vez de encerrar
+            Platform.runLater(() -> {
+                stage.setOnCloseRequest(event -> {
+                    event.consume();
+                    stage.hide();
+                    showMessage("CyberCore Signer", "O agente continua ativo na bandeja atendendo aplicações web.", TrayIcon.MessageType.INFO);
+                });
+            });
+
+            logger.info("System Tray configurado com sucesso.");
+            return true;
+
+        } catch (AWTException e) {
+            logger.warn("Falha ao registrar ícone no System Tray: {}", e.getMessage());
+            return false;
+        } catch (Throwable t) {
+            logger.warn("Erro ao inicializar System Tray: {}", t.getMessage());
+            return false;
+        }
+    }
+
+    public void showStage() {
+        if (stage != null) {
+            stage.show();
+            stage.setIconified(false);
+            stage.toFront();
+        }
+    }
+
+    public void showMessage(String title, String message, TrayIcon.MessageType type) {
+        if (initialized && trayIcon != null) {
+            try {
+                trayIcon.displayMessage(title, message, type);
+            } catch (Throwable t) {
+                logger.debug("Não foi possível exibir notificação no Tray: {}", t.getMessage());
+            }
+        }
+    }
+
+    public synchronized void remove() {
+        if (initialized && trayIcon != null) {
+            try {
+                SystemTray.getSystemTray().remove(trayIcon);
+            } catch (Throwable ignored) {
+            }
+            initialized = false;
+        }
+    }
+
+    private void shutdown() {
+        remove();
+        Platform.runLater(() -> {
+            stage.close();
+            Platform.exit();
+            System.exit(0);
+        });
+    }
+
+    /**
+     * Gera dinamicamente um ícone vetorial de 32x32 com o padrão de cores CyberCore (#38bdf8).
+     */
+    private Image createTrayIconImage() {
+        int size = 32;
+        BufferedImage image = new BufferedImage(size, size, BufferedImage.TYPE_INT_ARGB);
+        Graphics2D g = image.createGraphics();
+
+        g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
+
+        // Fundo em círculo azul escuro CyberCore
+        g.setColor(new Color(15, 23, 42));
+        g.fillRoundRect(2, 2, size - 4, size - 4, 8, 8);
+
+        // Borda ciano com gradiente
+        g.setColor(new Color(56, 189, 248));
+        g.drawRoundRect(2, 2, size - 4, size - 4, 8, 8);
+
+        // Letra C central estilizada
+        g.setColor(new Color(56, 189, 248));
+        g.setFont(new Font("SansSerif", Font.BOLD, 18));
+        g.drawString("C", 9, 23);
+
+        g.dispose();
+        return image;
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/A1PasswordDialog.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/A1PasswordDialog.java
new file mode 100644
index 0000000..2b7ee3d
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/A1PasswordDialog.java
@@ -0,0 +1,103 @@
+package br.com.cybercore.signer.ui.view;
+
+import br.com.cybercore.signer.ui.CyberCoreUiConstants;
+import br.com.cybercore.signer.ui.theme.ThemeManager;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.control.PasswordField;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.VBox;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+
+/**
+ * Diálogo modal para inserção segura da senha do certificado A1 (.pfx / .p12).
+ */
+public class A1PasswordDialog {
+
+    private final Stage stage;
+    private final CompletableFuture<char[]> passwordFuture = new CompletableFuture<>();
+
+    public A1PasswordDialog(Stage owner, String fileName) {
+        this.stage = new Stage();
+        this.stage.initModality(Modality.APPLICATION_MODAL);
+        if (owner != null) {
+            this.stage.initOwner(owner);
+        }
+        this.stage.setTitle("CyberCore Signer — Senha do Certificado A1");
+        this.stage.setResizable(false);
+
+        initLayout(fileName);
+    }
+
+    private void initLayout(String fileName) {
+        VBox root = new VBox(16);
+        root.getStyleClass().add("dialog-container");
+        root.setPadding(new Insets(24));
+        root.setPrefWidth(440);
+
+        Label header = new Label("IMPORTAR CERTIFICADO A1");
+        header.getStyleClass().add("dialog-header");
+
+        Label desc = new Label("Digite a senha do arquivo para desbloquear o certificado digital.");
+        desc.getStyleClass().add("brand-subtitle");
+
+        VBox fileBox = new VBox(4);
+        fileBox.getStyleClass().add("dialog-box");
+        Label fileTitle = new Label("Arquivo selecionado:");
+        fileTitle.getStyleClass().add("dialog-field-title");
+        Label fileNameLabel = new Label(fileName);
+        fileNameLabel.getStyleClass().add("detail-value");
+        fileBox.getChildren().addAll(fileTitle, fileNameLabel);
+
+        VBox inputGroup = new VBox(8);
+        Label pwdTitle = new Label("Senha do Certificado:");
+        pwdTitle.getStyleClass().add("dialog-field-title");
+
+        PasswordField passwordField = new PasswordField();
+        passwordField.setPromptText("Digite a senha...");
+
+        inputGroup.getChildren().addAll(pwdTitle, passwordField);
+
+        HBox actionsRow = new HBox(12);
+        actionsRow.setAlignment(Pos.CENTER_RIGHT);
+
+        Button btnCancel = new Button("Cancelar");
+        btnCancel.getStyleClass().add("btn-secondary");
+        btnCancel.setOnAction(e -> {
+            passwordFuture.complete(null);
+            stage.close();
+        });
+
+        Button btnConfirm = new Button("Importar");
+        btnConfirm.getStyleClass().add("btn-primary");
+        btnConfirm.setDefaultButton(true);
+        btnConfirm.setOnAction(e -> {
+            String text = passwordField.getText();
+            passwordFuture.complete(text != null ? text.toCharArray() : new char[0]);
+            stage.close();
+        });
+
+        actionsRow.getChildren().addAll(btnCancel, btnConfirm);
+
+        root.getChildren().addAll(header, desc, fileBox, inputGroup, actionsRow);
+
+        Scene scene = new Scene(root);
+        ThemeManager.applyTheme(scene);
+
+        stage.setScene(scene);
+        stage.setOnCloseRequest(e -> passwordFuture.complete(null));
+    }
+
+    public CompletableFuture<char[]> showAndAwait() {
+        stage.show();
+        return passwordFuture;
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/AboutView.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/AboutView.java
new file mode 100644
index 0000000..d9ece1c
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/AboutView.java
@@ -0,0 +1,52 @@
+package br.com.cybercore.signer.ui.view;
+
+import br.com.cybercore.signer.ui.CyberCoreUiConstants;
+import javafx.geometry.Pos;
+import javafx.scene.control.Label;
+import javafx.scene.layout.VBox;
+
+/**
+ * Painel informativo Sobre o CyberCore Signer.
+ */
+@SuppressWarnings("this-escape")
+public final class AboutView extends VBox {
+
+    public AboutView() {
+        initView();
+    }
+
+    private void initView() {
+        setSpacing(16);
+        setAlignment(Pos.CENTER);
+        getStyleClass().add("content-pane");
+
+        Label brandLabel = new Label(CyberCoreUiConstants.APP_NAME);
+        brandLabel.getStyleClass().add("brand-title");
+        brandLabel.setStyle("-fx-font-size: 24px;");
+
+        Label versionLabel = new Label("Versão " + CyberCoreUiConstants.APP_VERSION + " • CCSP/1");
+        versionLabel.getStyleClass().add("status-badge-active");
+
+        Label descLabel = new Label("Agente desktop profissional de assinatura digital segura para aplicações web.");
+        descLabel.getStyleClass().add("section-subtitle");
+
+        VBox detailsBox = new VBox(8);
+        detailsBox.setAlignment(Pos.CENTER);
+        detailsBox.getStyleClass().add("dialog-box");
+
+        Label p1 = new Label("• Criptografia local via JCA/JCE e PKCS#11.");
+        Label p2 = new Label("• A chave privada e o PIN nunca saem deste computador.");
+        Label p3 = new Label("• Comunicação restrita à interface local loopback (127.0.0.1).");
+        Label p4 = new Label("• Proteção contra replay attacks e validação estrita de origem.");
+
+        for (Label lbl : new Label[]{p1, p2, p3, p4}) {
+            lbl.getStyleClass().add("cert-detail");
+            detailsBox.getChildren().add(lbl);
+        }
+
+        Label copyLabel = new Label("© 2026 CyberCore. Todos os direitos reservados.");
+        copyLabel.getStyleClass().add("dialog-subtitle");
+
+        getChildren().addAll(brandLabel, versionLabel, descLabel, detailsBox, copyLabel);
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/ApplicationApprovalDialog.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/ApplicationApprovalDialog.java
new file mode 100644
index 0000000..092333d
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/ApplicationApprovalDialog.java
@@ -0,0 +1,123 @@
+package br.com.cybercore.signer.ui.view;
+
+import br.com.cybercore.signer.ui.CyberCoreUiConstants;
+import br.com.cybercore.signer.ui.theme.ThemeManager;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.VBox;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+import javafx.stage.StageStyle;
+
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+
+/**
+ * Diálogo modal para solicitar autorização explícita do usuário quando uma nova aplicação web
+ * tenta se conectar ao CyberCore Signer pela primeira vez.
+ */
+public class ApplicationApprovalDialog {
+
+    private final Stage stage;
+    private final CompletableFuture<Boolean> approvalFuture = new CompletableFuture<>();
+
+    public ApplicationApprovalDialog(Stage ownerStage, String origin, String appName, String applicationId) {
+        stage = new Stage();
+        stage.initOwner(ownerStage);
+        stage.initModality(Modality.APPLICATION_MODAL);
+        stage.initStyle(StageStyle.UTILITY);
+        stage.setTitle("CyberCore Signer — Solicitação de Conexão Web");
+        stage.setWidth(520);
+        stage.setResizable(false);
+
+        VBox root = new VBox(18);
+        root.setPadding(new Insets(24));
+        root.getStyleClass().add("dialog-container");
+
+        // Cabeçalho
+        VBox headerBox = new VBox(4);
+        Label titleLabel = new Label("NOVA APLICAÇÃO WEB SOLICITA ACESSO");
+        titleLabel.getStyleClass().add("dialog-header");
+
+        Label subtitleLabel = new Label("Um sistema web está tentando se conectar ao agente local CyberCore Signer.");
+        subtitleLabel.getStyleClass().add("dialog-subtitle");
+        headerBox.getChildren().addAll(titleLabel, subtitleLabel);
+
+        // Painel de Detalhes da Aplicação
+        VBox detailsBox = new VBox(10);
+        detailsBox.getStyleClass().add("dialog-box");
+
+        VBox appRow = new VBox(2);
+        Label appTitle = new Label("APLICAÇÃO SOLICITANTE");
+        appTitle.getStyleClass().add("dialog-field-title");
+        Label appValue = new Label(appName != null && !appName.isBlank() ? appName : "Aplicação Web Externa");
+        appValue.getStyleClass().add("dialog-field-value");
+        appValue.setStyle("-fx-font-weight: bold;");
+        appRow.getChildren().addAll(appTitle, appValue);
+
+        VBox originRow = new VBox(2);
+        Label originTitle = new Label("ORIGEM WEB (URL)");
+        originTitle.getStyleClass().add("dialog-field-title");
+        Label originValue = new Label(origin != null ? origin : "Origem desconhecida");
+        originValue.setStyle("-fx-text-fill: -fx-accent; -fx-font-size: 13px; -fx-font-family: monospace;");
+        originRow.getChildren().addAll(originTitle, originValue);
+
+        VBox idRow = new VBox(2);
+        Label idTitle = new Label("IDENTIFICADOR DA APLICAÇÃO");
+        idTitle.getStyleClass().add("dialog-field-title");
+        Label idValue = new Label(applicationId);
+        idValue.getStyleClass().add("dialog-field-value");
+        idValue.setStyle("-fx-font-size: 12px; -fx-font-family: monospace;");
+        idRow.getChildren().addAll(idTitle, idValue);
+
+        detailsBox.getChildren().addAll(appRow, originRow, idRow);
+
+        // Aviso de Segurança
+        Label secWarning = new Label(
+                "🛡️ Segurança: Aplicações autorizadas podem consultar a lista pública de certificados " +
+                "instalados e solicitar assinaturas. Nenhuma assinatura será realizada sem a sua confirmação explícita na tela."
+        );
+        secWarning.setWrapText(true);
+        secWarning.setStyle("-fx-text-fill: -fx-text-secondary; -fx-font-size: 11px; -fx-line-spacing: 2px;");
+
+        // Botões de Ação
+        HBox actionsRow = new HBox(12);
+        actionsRow.setAlignment(Pos.CENTER_RIGHT);
+
+        Button btnReject = new Button("Recusar Acesso");
+        btnReject.getStyleClass().add("btn-secondary");
+        btnReject.setOnAction(e -> {
+            approvalFuture.complete(false);
+            stage.close();
+        });
+
+        Button btnAuthorize = new Button("Autorizar Conexão");
+        btnAuthorize.getStyleClass().add("btn-primary");
+        btnAuthorize.setDefaultButton(true);
+        btnAuthorize.setOnAction(e -> {
+            approvalFuture.complete(true);
+            stage.close();
+        });
+
+        actionsRow.getChildren().addAll(btnReject, btnAuthorize);
+
+        root.getChildren().addAll(headerBox, detailsBox, secWarning, actionsRow);
+
+        Scene scene = new Scene(root);
+        ThemeManager.applyTheme(scene);
+
+        stage.setScene(scene);
+        stage.setOnCloseRequest(e -> approvalFuture.complete(false));
+    }
+
+    public CompletableFuture<Boolean> showAndAwait() {
+        stage.show();
+        stage.toFront();
+        return approvalFuture;
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/BatchSigningDialog.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/BatchSigningDialog.java
new file mode 100644
index 0000000..e23e640
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/BatchSigningDialog.java
@@ -0,0 +1,491 @@
+package br.com.cybercore.signer.ui.view;
+
+import br.com.cybercore.signer.core.crypto.SigningService;
+import br.com.cybercore.signer.core.domain.CertificateStatus;
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.domain.SigningContext;
+import br.com.cybercore.signer.core.domain.SigningResult;
+import br.com.cybercore.signer.core.provider.CertificateManager;
+import br.com.cybercore.signer.ui.CyberCoreUiConstants;
+import br.com.cybercore.signer.ui.components.SvgIcons;
+import br.com.cybercore.signer.ui.theme.ThemeManager;
+import javafx.application.Platform;
+import javafx.beans.property.SimpleStringProperty;
+import javafx.collections.FXCollections;
+import javafx.collections.ObservableList;
+import javafx.concurrent.Task;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.Alert;
+import javafx.scene.control.Button;
+import javafx.scene.control.ComboBox;
+import javafx.scene.control.Label;
+import javafx.scene.control.ListCell;
+import javafx.scene.control.ProgressBar;
+import javafx.scene.control.TableColumn;
+import javafx.scene.control.TableView;
+import javafx.scene.control.TextField;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.VBox;
+import javafx.stage.DirectoryChooser;
+import javafx.stage.FileChooser;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.security.MessageDigest;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+import java.util.UUID;
+
+/**
+ * Diálogo modal para execução de Assinatura Digital em Lote de múltiplos arquivos (PDF, XML e arquivos diversos).
+ */
+@SuppressWarnings("this-escape")
+public final class BatchSigningDialog {
+
+    private static final Logger logger = LoggerFactory.getLogger(BatchSigningDialog.class);
+
+    private final Stage stage;
+    private final CertificateManager certManager;
+    private final SigningService signingService;
+
+    private final ObservableList<BatchItem> fileItems = FXCollections.observableArrayList();
+    private TableView<BatchItem> tableView;
+    private ComboBox<ManagedCertificate> certCombo;
+    private TextField txtOutputDir;
+    private ProgressBar progressBar;
+    private Label lblProgressStatus;
+    private Button btnStart;
+    private Button btnAddFiles;
+    private Button btnClear;
+    private Button btnChooseOutputDir;
+
+    private volatile boolean isRunning = false;
+
+    public static class BatchItem {
+        private final File file;
+        private final SimpleStringProperty fileName = new SimpleStringProperty();
+        private final SimpleStringProperty fileSize = new SimpleStringProperty();
+        private final SimpleStringProperty status = new SimpleStringProperty("Aguardando");
+
+        public BatchItem(File file) {
+            this.file = file;
+            this.fileName.set(file.getName());
+            this.fileSize.set(formatSize(file.length()));
+        }
+
+        public File getFile() {
+            return file;
+        }
+
+        public String getFileName() {
+            return fileName.get();
+        }
+
+        public SimpleStringProperty fileNameProperty() {
+            return fileName;
+        }
+
+        public String getFileSize() {
+            return fileSize.get();
+        }
+
+        public SimpleStringProperty fileSizeProperty() {
+            return fileSize;
+        }
+
+        public String getStatus() {
+            return status.get();
+        }
+
+        public void setStatus(String val) {
+            this.status.set(val);
+        }
+
+        public SimpleStringProperty statusProperty() {
+            return status;
+        }
+
+        private static String formatSize(long bytes) {
+            if (bytes < 1024) return bytes + " B";
+            int exp = (int) (Math.log(bytes) / Math.log(1024));
+            char pre = "KMGTPE".charAt(exp - 1);
+            return String.format("%.1f %sB", bytes / Math.pow(1024, exp), pre);
+        }
+    }
+
+    public BatchSigningDialog(Stage owner, CertificateManager certManager, SigningService signingService) {
+        this.certManager = Objects.requireNonNull(certManager, "CertificateManager não pode ser nulo.");
+        this.signingService = Objects.requireNonNull(signingService, "SigningService não pode ser nulo.");
+
+        this.stage = new Stage();
+        this.stage.initModality(Modality.APPLICATION_MODAL);
+        if (owner != null) {
+            this.stage.initOwner(owner);
+        }
+        this.stage.setTitle("CyberCore Signer — Assinatura Digital em Lote");
+        this.stage.setResizable(true);
+        this.stage.setMinWidth(750);
+        this.stage.setMinHeight(580);
+
+        initLayout();
+    }
+
+    private void initLayout() {
+        VBox root = new VBox(16);
+        root.setPadding(new Insets(20));
+        root.getStyleClass().add("dialog-container");
+
+        // Topo / Cabeçalho
+        HBox header = new HBox(12);
+        header.setAlignment(Pos.CENTER_LEFT);
+        header.getChildren().addAll(
+                SvgIcons.batchIcon(),
+                createHeaderLabel("ASSINATURA DIGITAL EM LOTE", "Assine múltiplos arquivos de uma só vez utilizando seu Certificado Digital ICP-Brasil")
+        );
+
+        // Barra de Ação de Arquivos
+        HBox fileActions = new HBox(10);
+        fileActions.setAlignment(Pos.CENTER_LEFT);
+
+        btnAddFiles = new Button("Adicionar Arquivos...");
+        btnAddFiles.getStyleClass().add("btn-primary");
+        btnAddFiles.setOnAction(e -> handleAddFiles());
+
+        btnClear = new Button("Limpar Lista");
+        btnClear.getStyleClass().add("btn-secondary");
+        btnClear.setOnAction(e -> {
+            if (!isRunning) fileItems.clear();
+        });
+
+        fileActions.getChildren().addAll(btnAddFiles, btnClear);
+
+        // Tabela de Arquivos
+        tableView = new TableView<>(fileItems);
+        VBox.setVgrow(tableView, Priority.ALWAYS);
+
+        TableColumn<BatchItem, String> colName = new TableColumn<>("Nome do Arquivo");
+        colName.setCellValueFactory(c -> c.getValue().fileNameProperty());
+        colName.setPrefWidth(320);
+
+        TableColumn<BatchItem, String> colSize = new TableColumn<>("Tamanho");
+        colSize.setCellValueFactory(c -> c.getValue().fileSizeProperty());
+        colSize.setPrefWidth(120);
+
+        TableColumn<BatchItem, String> colStatus = new TableColumn<>("Status");
+        colStatus.setCellValueFactory(c -> c.getValue().statusProperty());
+        tableView.getColumns().add(colName);
+        tableView.getColumns().add(colSize);
+        tableView.getColumns().add(colStatus);
+        tableView.setPlaceholder(new Label("Nenhum arquivo adicionado. Clique em 'Adicionar Arquivos...' para selecionar."));
+
+        // Seção de Configuração do Certificado e Destino
+        VBox configBox = new VBox(10);
+        configBox.getStyleClass().add("dialog-box");
+
+        // Seleção do Certificado
+        HBox certRow = new HBox(10);
+        certRow.setAlignment(Pos.CENTER_LEFT);
+        Label lblCert = new Label("Certificado Digital:");
+        lblCert.getStyleClass().add("dialog-field-title");
+        lblCert.setStyle("-fx-min-width: 140;");
+
+        certCombo = new ComboBox<>();
+        certCombo.setMaxWidth(Double.MAX_VALUE);
+        HBox.setHgrow(certCombo, Priority.ALWAYS);
+        populateCertificates();
+
+        certCombo.setCellFactory(lv -> new ListCell<>() {
+            @Override
+            protected void updateItem(ManagedCertificate item, boolean empty) {
+                super.updateItem(item, empty);
+                if (empty || item == null) {
+                    setText(null);
+                } else {
+                    String doc = item.cpf() != null ? "CPF: " + item.cpf() : (item.cnpj() != null ? "CNPJ: " + item.cnpj() : "");
+                    setText(item.commonName() + " (" + item.type() + ") " + doc);
+                }
+            }
+        });
+        certCombo.setButtonCell(new ListCell<>() {
+            @Override
+            protected void updateItem(ManagedCertificate item, boolean empty) {
+                super.updateItem(item, empty);
+                if (empty || item == null) {
+                    setText("Selecione um Certificado Digital...");
+                } else {
+                    String doc = item.cpf() != null ? " [CPF: " + item.cpf() + "]" : (item.cnpj() != null ? " [CNPJ: " + item.cnpj() + "]" : "");
+                    setText(item.commonName() + doc + " • " + item.type());
+                }
+            }
+        });
+
+        certRow.getChildren().addAll(lblCert, certCombo);
+
+        // Pasta de Saída
+        HBox outputRow = new HBox(10);
+        outputRow.setAlignment(Pos.CENTER_LEFT);
+        Label lblOutput = new Label("Pasta de Destino:");
+        lblOutput.getStyleClass().add("dialog-field-title");
+        lblOutput.setStyle("-fx-min-width: 140;");
+
+        txtOutputDir = new TextField();
+        txtOutputDir.setPromptText("Salvar na mesma pasta dos arquivos originais");
+        txtOutputDir.setMaxWidth(Double.MAX_VALUE);
+        HBox.setHgrow(txtOutputDir, Priority.ALWAYS);
+
+        btnChooseOutputDir = new Button("Selecionar...");
+        btnChooseOutputDir.getStyleClass().add("btn-secondary");
+        btnChooseOutputDir.setOnAction(e -> handleChooseOutputDir());
+
+        outputRow.getChildren().addAll(lblOutput, txtOutputDir, btnChooseOutputDir);
+
+        configBox.getChildren().addAll(certRow, outputRow);
+
+        // Progresso e Ações Finais
+        VBox progressBox = new VBox(6);
+        progressBar = new ProgressBar(0);
+        progressBar.setMaxWidth(Double.MAX_VALUE);
+        progressBar.setVisible(false);
+
+        lblProgressStatus = new Label("");
+        lblProgressStatus.getStyleClass().add("dialog-subtitle");
+
+        progressBox.getChildren().addAll(progressBar, lblProgressStatus);
+
+        HBox footer = new HBox(12);
+        footer.setAlignment(Pos.CENTER_RIGHT);
+
+        Button btnClose = new Button("Fechar");
+        btnClose.getStyleClass().add("btn-secondary");
+        btnClose.setOnAction(e -> {
+            if (!isRunning) stage.close();
+        });
+
+        btnStart = new Button("Iniciar Assinatura em Lote");
+        btnStart.getStyleClass().add("btn-primary");
+        btnStart.setOnAction(e -> startBatchSigning());
+
+        footer.getChildren().addAll(btnClose, btnStart);
+
+        root.getChildren().addAll(header, fileActions, tableView, configBox, progressBox, footer);
+
+        Scene scene = new Scene(root);
+        ThemeManager.applyTheme(scene);
+
+        stage.setScene(scene);
+    }
+
+    private void handleAddFiles() {
+        FileChooser fileChooser = new FileChooser();
+        fileChooser.setTitle("Selecionar Arquivos para Assinatura em Lote");
+        fileChooser.getExtensionFilters().addAll(
+                new FileChooser.ExtensionFilter("Todos os Arquivos Suportados", "*.pdf", "*.xml", "*.txt", "*.doc", "*.docx", "*.*"),
+                new FileChooser.ExtensionFilter("Arquivos PDF (*.pdf)", "*.pdf"),
+                new FileChooser.ExtensionFilter("Arquivos XML (*.xml)", "*.xml")
+        );
+
+        List<File> selected = fileChooser.showOpenMultipleDialog(stage);
+        if (selected != null) {
+            for (File f : selected) {
+                boolean exists = fileItems.stream().anyMatch(item -> item.getFile().getAbsolutePath().equals(f.getAbsolutePath()));
+                if (!exists) {
+                    fileItems.add(new BatchItem(f));
+                }
+            }
+        }
+    }
+
+    private void handleChooseOutputDir() {
+        DirectoryChooser dirChooser = new DirectoryChooser();
+        dirChooser.setTitle("Selecionar Pasta para Salvar Arquivos Assinados");
+        File dir = dirChooser.showDialog(stage);
+        if (dir != null) {
+            txtOutputDir.setText(dir.getAbsolutePath());
+        }
+    }
+
+    private void populateCertificates() {
+        try {
+            List<ManagedCertificate> certs = certManager.getAvailableCertificates();
+            certCombo.setItems(FXCollections.observableArrayList(certs));
+            if (!certs.isEmpty()) {
+                certCombo.getSelectionModel().select(0);
+            }
+        } catch (Exception e) {
+            logger.warn("Erro ao listar certificados para lote: {}", e.getMessage());
+        }
+    }
+
+    private void startBatchSigning() {
+        if (fileItems.isEmpty()) {
+            showAlert("Nenhum Arquivo", "Por favor, adicione pelo menos um arquivo para assinar.");
+            return;
+        }
+
+        ManagedCertificate selectedCert = certCombo.getValue();
+        if (selectedCert == null) {
+            showAlert("Certificado Não Selecionado", "Selecione o Certificado Digital que será utilizado para as assinaturas.");
+            return;
+        }
+
+        if (selectedCert.status() != CertificateStatus.AVAILABLE) {
+            showAlert("Certificado Indisponível", "O certificado selecionado não está pronto ou disponível para assinatura.");
+            return;
+        }
+
+        isRunning = true;
+        setControlsDisabled(true);
+        progressBar.setVisible(true);
+        progressBar.setProgress(0);
+
+        List<BatchItem> itemsToProcess = new ArrayList<>(fileItems);
+        String customOutDir = txtOutputDir.getText().trim();
+
+        Task<Void> batchTask = new Task<>() {
+            @Override
+            protected Void call() throws Exception {
+                int total = itemsToProcess.size();
+                int successCount = 0;
+
+                for (int i = 0; i < total; i++) {
+                    BatchItem item = itemsToProcess.get(i);
+                    final int currentIdx = i + 1;
+
+                    Platform.runLater(() -> {
+                        item.setStatus("Assinando...");
+                        progressBar.setProgress((double) currentIdx / total);
+                        lblProgressStatus.setText(String.format("Processando arquivo %d de %d: %s", currentIdx, total, item.getFileName()));
+                    });
+
+                    try {
+                        // Determina local de gravação
+                        Path targetDir = customOutDir.isEmpty()
+                                ? item.getFile().toPath().getParent()
+                                : Path.of(customOutDir);
+
+                        String lowerName = item.getFileName().toLowerCase();
+                        if (lowerName.endsWith(".pdf")) {
+                            // Assinatura PAdES de PDF com selo visual
+                            br.com.cybercore.signer.core.pdf.PdfSigningService pdfService =
+                                    new br.com.cybercore.signer.core.pdf.PdfSigningService(certManager);
+                            br.com.cybercore.signer.core.pdf.PdfSignatureOptions options =
+                                    br.com.cybercore.signer.core.pdf.PdfSignatureOptions.builder(selectedCert.id())
+                                            .visibleSeal(true)
+                                            .build();
+                            String outPdfName = item.getFileName().substring(0, item.getFileName().length() - 4) + "_assinado.pdf";
+                            Path dest = targetDir.resolve(outPdfName);
+                            pdfService.signPdfFile(item.getFile(), dest.toFile(), options);
+                        } else if (lowerName.endsWith(".xml")) {
+                            // Assinatura XMLDSig de documento XML
+                            br.com.cybercore.signer.core.xml.XmlSigningService xmlService =
+                                    new br.com.cybercore.signer.core.xml.XmlSigningService(certManager);
+                            br.com.cybercore.signer.core.xml.XmlSignatureOptions options =
+                                    br.com.cybercore.signer.core.xml.XmlSignatureOptions.wholeDocument(selectedCert.id(), null);
+                            String outXmlName = item.getFileName().substring(0, item.getFileName().length() - 4) + "_assinado.xml";
+                            Path dest = targetDir.resolve(outXmlName);
+                            xmlService.signXmlFile(item.getFile(), dest.toFile(), options);
+                        } else {
+                            // Assinatura genérica por digest (.p7s)
+                            byte[] fileBytes = Files.readAllBytes(item.getFile().toPath());
+                            byte[] digest = MessageDigest.getInstance("SHA-256").digest(fileBytes);
+
+                            SigningContext context = new SigningContext(
+                                    UUID.randomUUID().toString(),
+                                    "cybercore-desktop-batch",
+                                    digest,
+                                    "SHA256withRSA",
+                                    selectedCert.id(),
+                                    Instant.now()
+                            );
+
+                            SigningResult result = signingService.sign(context);
+                            String outFileName = item.getFileName() + ".p7s";
+                            Path dest = targetDir.resolve(outFileName);
+                            Files.write(dest, result.signatureBytes());
+                        }
+
+                        Platform.runLater(() -> item.setStatus("✓ Assinado com Sucesso"));
+                        successCount++;
+                    } catch (Exception ex) {
+                        logger.error("Falha ao assinar arquivo {}: {}", item.getFileName(), ex.getMessage(), ex);
+                        Platform.runLater(() -> item.setStatus("✗ Erro: " + ex.getMessage()));
+                    }
+                }
+
+                final int finalSuccess = successCount;
+                Platform.runLater(() -> {
+                    lblProgressStatus.setText(String.format("Lote concluído: %d de %d arquivos assinados com sucesso.", finalSuccess, total));
+                    showAlert("Assinatura em Lote Concluída",
+                            String.format("Processamento finalizado com sucesso!\n\n• Arquivos assinados: %d\n• Total processado: %d", finalSuccess, total));
+                });
+
+                return null;
+            }
+
+            @Override
+            protected void succeeded() {
+                isRunning = false;
+                setControlsDisabled(false);
+            }
+
+            @Override
+            protected void failed() {
+                isRunning = false;
+                setControlsDisabled(false);
+                showAlert("Erro no Lote", "Ocorreu uma falha durante o processamento do lote: " + getException().getMessage());
+            }
+        };
+
+        Thread thread = new Thread(batchTask, "Batch-Signer-Worker");
+        thread.setDaemon(true);
+        thread.start();
+    }
+
+    private void setControlsDisabled(boolean disabled) {
+        btnStart.setDisable(disabled);
+        btnAddFiles.setDisable(disabled);
+        btnClear.setDisable(disabled);
+        certCombo.setDisable(disabled);
+        btnChooseOutputDir.setDisable(disabled);
+    }
+
+    private void showAlert(String title, String message) {
+        Alert alert = new Alert(Alert.AlertType.INFORMATION);
+        alert.setTitle(title);
+        alert.setHeaderText(null);
+        alert.setContentText(message);
+        alert.initOwner(stage);
+        if (alert.getDialogPane() != null && alert.getDialogPane().getScene() != null) {
+            ThemeManager.applyTheme(alert.getDialogPane().getScene());
+        }
+        alert.showAndWait();
+    }
+
+    private VBox createHeaderLabel(String title, String subtitle) {
+        VBox box = new VBox(3);
+        Label t = new Label(title);
+        t.getStyleClass().add("dialog-header");
+        Label s = new Label(subtitle);
+        s.getStyleClass().add("dialog-subtitle");
+        box.getChildren().addAll(t, s);
+        return box;
+    }
+
+    public void show() {
+        stage.show();
+    }
+
+    public Stage getStage() {
+        return stage;
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/CertificateDetailsDialog.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/CertificateDetailsDialog.java
new file mode 100644
index 0000000..e3c3f50
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/CertificateDetailsDialog.java
@@ -0,0 +1,213 @@
+package br.com.cybercore.signer.ui.view;
+
+import br.com.cybercore.signer.core.domain.CertificateStatus;
+import br.com.cybercore.signer.core.domain.CertificateType;
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.ui.CyberCoreUiConstants;
+import br.com.cybercore.signer.ui.components.SvgIcons;
+import br.com.cybercore.signer.ui.theme.ThemeManager;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.control.ScrollPane;
+import javafx.scene.layout.GridPane;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.VBox;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+
+import java.time.Instant;
+import java.time.ZoneId;
+import java.time.format.DateTimeFormatter;
+import java.time.temporal.ChronoUnit;
+import java.util.Objects;
+import java.util.function.Consumer;
+
+/**
+ * Diálogo modal para exibição de detalhes e metadados de um certificado digital.
+ */
+public class CertificateDetailsDialog {
+
+    private static final DateTimeFormatter DATE_TIME_FORMATTER = DateTimeFormatter.ofPattern("dd/MM/yyyy HH:mm:ss")
+            .withZone(ZoneId.systemDefault());
+
+    private final Stage stage;
+    private final ManagedCertificate cert;
+
+    public CertificateDetailsDialog(Stage owner, ManagedCertificate cert) {
+        this.cert = Objects.requireNonNull(cert, "Certificado não pode ser nulo.");
+
+        this.stage = new Stage();
+        this.stage.initModality(Modality.APPLICATION_MODAL);
+        if (owner != null) {
+            this.stage.initOwner(owner);
+        }
+        this.stage.setTitle("CyberCore Signer — Detalhes do Certificado");
+        this.stage.setResizable(true);
+        this.stage.setMinWidth(600);
+        this.stage.setMinHeight(520);
+
+        initLayout();
+    }
+
+    private void initLayout() {
+        VBox root = new VBox(18);
+        root.getStyleClass().add("dialog-container");
+        root.setPadding(new Insets(24));
+
+        // Cabeçalho
+        HBox headerRow = new HBox(12);
+        headerRow.setAlignment(Pos.CENTER_LEFT);
+
+        Label headerTitle = new Label("DETALHES DO CERTIFICADO");
+        headerTitle.getStyleClass().add("dialog-header");
+        HBox.setHgrow(headerTitle, Priority.ALWAYS);
+
+        Label badge = new Label(cert.type() == CertificateType.A1 ? "A1 • SOFTWARE" : "A3 • HARDWARE/TOKEN");
+        badge.getStyleClass().add(cert.type() == CertificateType.A1 ? "cert-badge-a1" : "cert-badge-a3");
+
+        headerRow.getChildren().addAll(headerTitle, badge);
+
+        // Nome do Titular em destaque
+        VBox titleBox = new VBox(4);
+        Label nameLabel = new Label(cert.commonName() != null ? cert.commonName() : cert.alias());
+        nameLabel.getStyleClass().add("cert-title");
+        nameLabel.setStyle("-fx-font-size: 16px; -fx-font-weight: bold;");
+
+        String docInfo = "";
+        if (cert.cpf() != null) {
+            docInfo = "CPF: " + formatCpf(cert.cpf());
+        } else if (cert.cnpj() != null) {
+            docInfo = "CNPJ: " + formatCnpj(cert.cnpj());
+        }
+        Label docLabel = new Label(docInfo.isEmpty() ? "Alias: " + cert.alias() : docInfo);
+        docLabel.getStyleClass().add("brand-subtitle");
+
+        titleBox.getChildren().addAll(nameLabel, docLabel);
+
+        // Grade de Informações Técnicas
+        GridPane grid = new GridPane();
+        grid.setHgap(16);
+        grid.setVgap(10);
+        grid.setPadding(new Insets(8, 0, 8, 0));
+
+        int row = 0;
+        addField(grid, row++, "Status:", formatStatus(cert));
+        addField(grid, row++, "Dispositivo / Origem:", cert.hardwareDeviceName() != null ? cert.hardwareDeviceName() : cert.providerId());
+        addField(grid, row++, "Emissor (AC):", extractCn(cert.issuerDn()));
+        addField(grid, row++, "Válido de:", cert.notBefore() != null ? DATE_TIME_FORMATTER.format(cert.notBefore()) : "N/D");
+        addField(grid, row++, "Válido até:", formatExpiration(cert.notAfter()));
+        addField(grid, row++, "Algoritmo da Chave:", cert.algorithm() + " (" + cert.keySize() + " bits)");
+        addField(grid, row++, "Número de Série:", cert.serialNumber() != null ? cert.serialNumber() : "N/D");
+        addField(grid, row++, "SHA-1 Thumbprint:", cert.sha1Fingerprint() != null ? formatFingerprint(cert.sha1Fingerprint()) : "N/D");
+        addField(grid, row++, "SHA-256 Thumbprint:", cert.sha256Fingerprint() != null ? formatFingerprint(cert.sha256Fingerprint()) : "N/D");
+
+        VBox detailsBox = new VBox(10);
+        detailsBox.getStyleClass().add("dialog-box");
+        detailsBox.getChildren().add(grid);
+
+        // Subject DN expansível
+        VBox dnBox = new VBox(4);
+        Label dnTitle = new Label("Subject Distinguished Name (DN):");
+        dnTitle.getStyleClass().add("dialog-field-title");
+        Label dnValue = new Label(cert.subjectDn());
+        dnValue.getStyleClass().add("dialog-hash-value");
+        dnValue.setWrapText(true);
+        dnBox.getChildren().addAll(dnTitle, dnValue);
+        detailsBox.getChildren().add(dnBox);
+
+        ScrollPane scroll = new ScrollPane(detailsBox);
+        scroll.setFitToWidth(true);
+        scroll.setStyle("-fx-background: transparent; -fx-background-color: transparent;");
+        VBox.setVgrow(scroll, Priority.ALWAYS);
+
+        // Botões de Ação
+        HBox actionsRow = new HBox(12);
+        actionsRow.setAlignment(Pos.CENTER_RIGHT);
+
+        Button btnClose = new Button(" Fechar", SvgIcons.closeIcon(13));
+        btnClose.getStyleClass().add("btn-secondary");
+        btnClose.setPrefWidth(95);
+        btnClose.setOnAction(e -> stage.close());
+
+        actionsRow.getChildren().add(btnClose);
+
+        root.getChildren().addAll(headerRow, titleBox, scroll, actionsRow);
+
+        Scene scene = new Scene(root);
+        ThemeManager.applyTheme(scene);
+
+        stage.setScene(scene);
+    }
+
+    public void show() {
+        stage.show();
+    }
+
+    private void addField(GridPane grid, int row, String label, String value) {
+        Label lbl = new Label(label);
+        lbl.getStyleClass().add("dialog-field-title");
+
+        Label val = new Label(value);
+        val.getStyleClass().add("detail-value");
+        val.setWrapText(true);
+
+        grid.add(lbl, 0, row);
+        grid.add(val, 1, row);
+    }
+
+    private String formatStatus(ManagedCertificate c) {
+        if (c.status() == CertificateStatus.AVAILABLE && c.isCurrentlyValid()) {
+            return "● Disponível para assinatura";
+        }
+        return "● " + c.status().getDescription();
+    }
+
+    private String formatExpiration(Instant notAfter) {
+        if (notAfter == null) return "N/D";
+        String dateStr = DATE_TIME_FORMATTER.format(notAfter);
+        Instant now = Instant.now();
+        if (now.isAfter(notAfter)) {
+            return dateStr + " (EXPIRADO)";
+        }
+        long daysRemaining = ChronoUnit.DAYS.between(now, notAfter);
+        return dateStr + " (" + daysRemaining + " dias restantes)";
+    }
+
+    private String formatCpf(String cpf) {
+        if (cpf != null && cpf.length() == 11) {
+            return cpf.substring(0, 3) + "." + cpf.substring(3, 6) + "." + cpf.substring(6, 9) + "-" + cpf.substring(9);
+        }
+        return cpf;
+    }
+
+    private String formatCnpj(String cnpj) {
+        if (cnpj != null && cnpj.length() == 14) {
+            return cnpj.substring(0, 2) + "." + cnpj.substring(2, 5) + "." + cnpj.substring(5, 8) + "/" + cnpj.substring(8, 12) + "-" + cnpj.substring(12);
+        }
+        return cnpj;
+    }
+
+    private String extractCn(String dn) {
+        if (dn == null) return "Desconhecido";
+        int idx = dn.indexOf("CN=");
+        if (idx >= 0) {
+            int end = dn.indexOf(',', idx);
+            return end > idx ? dn.substring(idx + 3, end).trim() : dn.substring(idx + 3).trim();
+        }
+        return dn;
+    }
+
+    private String formatFingerprint(String hex) {
+        if (hex == null || hex.length() < 4) return hex;
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < hex.length(); i += 2) {
+            if (i > 0) sb.append(":");
+            sb.append(hex, i, Math.min(i + 2, hex.length()));
+        }
+        return sb.toString();
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/CertificatesManagerDialog.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/CertificatesManagerDialog.java
new file mode 100644
index 0000000..c568a96
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/CertificatesManagerDialog.java
@@ -0,0 +1,192 @@
+package br.com.cybercore.signer.ui.view;
+
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.provider.CertificateManager;
+import br.com.cybercore.signer.core.provider.Pkcs12CertificateProvider;
+import br.com.cybercore.signer.ui.CyberCoreUiConstants;
+import br.com.cybercore.signer.ui.theme.ThemeManager;
+import br.com.cybercore.signer.ui.components.CertificateCardNode;
+import br.com.cybercore.signer.ui.components.SvgIcons;
+import javafx.application.Platform;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.Alert;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.control.ScrollPane;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.VBox;
+import javafx.stage.FileChooser;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
+import java.nio.file.Files;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * Diálogo de gerenciamento de Certificados Digitais e Arquivos Seguros.
+ * Permite listar certificados instalados, inspecionar detalhes técnicos (sem teste de assinatura) e importar A1 (.pfx/.p12).
+ */
+@SuppressWarnings("this-escape")
+public final class CertificatesManagerDialog {
+
+    private static final Logger logger = LoggerFactory.getLogger(CertificatesManagerDialog.class);
+
+    private final Stage stage;
+    private final CertificateManager certManager;
+    private final VBox certificatesContainer = new VBox(10);
+
+    public CertificatesManagerDialog(Stage owner, CertificateManager certManager) {
+        this.certManager = Objects.requireNonNull(certManager);
+        this.stage = new Stage();
+        this.stage.initModality(Modality.APPLICATION_MODAL);
+        if (owner != null) {
+            this.stage.initOwner(owner);
+        }
+        this.stage.setTitle("CyberCore Signer — Certificados Digitais & Arquivos Seguros");
+        this.stage.setResizable(true);
+        this.stage.setMinWidth(720);
+        this.stage.setMinHeight(520);
+
+        initLayout();
+    }
+
+    private void initLayout() {
+        VBox root = new VBox(16);
+        root.setPadding(new Insets(20));
+        root.getStyleClass().add("dialog-container");
+
+        HBox header = new HBox(12);
+        header.setAlignment(Pos.CENTER_LEFT);
+        header.getChildren().addAll(
+                SvgIcons.certificatesIcon(),
+                createHeaderLabel("CERTIFICADOS DIGITAIS & ARQUIVOS SEGUROS", "Gerencie os certificados ICP-Brasil instalados e importe arquivos A1 (.pfx / .p12)")
+        );
+
+        // Barra de Ações
+        HBox actions = new HBox(10);
+        actions.setAlignment(Pos.CENTER_LEFT);
+
+        Button btnAddA1 = new Button("Importar A1 (.pfx / .p12)...");
+        btnAddA1.getStyleClass().add("btn-primary");
+        btnAddA1.setOnAction(e -> handleImportA1());
+
+        Button btnRefresh = new Button("Atualizar Lista");
+        btnRefresh.getStyleClass().add("btn-secondary");
+        btnRefresh.setOnAction(e -> refreshList());
+
+        actions.getChildren().addAll(btnAddA1, btnRefresh);
+
+        // Container com Scroll
+        ScrollPane scroll = new ScrollPane(certificatesContainer);
+        scroll.setFitToWidth(true);
+        scroll.setStyle("-fx-background: transparent; -fx-background-color: transparent;");
+        VBox.setVgrow(scroll, Priority.ALWAYS);
+
+        refreshList();
+
+        HBox footer = new HBox();
+        footer.setAlignment(Pos.CENTER_RIGHT);
+        Button btnClose = new Button("Fechar");
+        btnClose.getStyleClass().add("btn-secondary");
+        btnClose.setOnAction(e -> stage.close());
+        footer.getChildren().add(btnClose);
+
+        root.getChildren().addAll(header, actions, scroll, footer);
+
+        Scene scene = new Scene(root);
+        ThemeManager.applyTheme(scene);
+
+        stage.setScene(scene);
+    }
+
+    private void refreshList() {
+        certificatesContainer.getChildren().clear();
+        try {
+            List<ManagedCertificate> certs = certManager.discoverCertificates();
+            if (certs.isEmpty()) {
+                Label emptyLabel = new Label("Nenhum certificado digital identificado.\nConecte seu token USB/Smart Card A3 ou importe um certificado A1 (.pfx/.p12).");
+                emptyLabel.getStyleClass().add("dialog-subtitle");
+                emptyLabel.setStyle("-fx-padding: 20;");
+                certificatesContainer.getChildren().add(emptyLabel);
+            } else {
+                for (ManagedCertificate cert : certs) {
+                    CertificateCardNode card = new CertificateCardNode(cert);
+                    card.setOnMouseClicked(e -> {
+                        // Abre os detalhes SEM botão de teste de assinatura
+                        CertificateDetailsDialog details = new CertificateDetailsDialog(stage, cert);
+                        details.show();
+                    });
+                    certificatesContainer.getChildren().add(card);
+                }
+            }
+        } catch (Exception ex) {
+            logger.error("Erro ao listar certificados: {}", ex.getMessage(), ex);
+        }
+    }
+
+    private void handleImportA1() {
+        FileChooser chooser = new FileChooser();
+        chooser.setTitle("Selecionar Certificado A1 (.pfx, .p12)");
+        chooser.getExtensionFilters().add(new FileChooser.ExtensionFilter("Certificados PKCS#12 (*.pfx, *.p12)", "*.pfx", "*.p12"));
+        File file = chooser.showOpenDialog(stage);
+        if (file != null) {
+            A1PasswordDialog pwdDialog = new A1PasswordDialog(stage, file.getName());
+            pwdDialog.showAndAwait().thenAccept(password -> {
+                if (password == null) return;
+                try {
+                    byte[] data = Files.readAllBytes(file.toPath());
+                    String providerId = "provider-a1-" + Integer.toHexString(file.getAbsolutePath().hashCode());
+                    Pkcs12CertificateProvider provider = new Pkcs12CertificateProvider(providerId, file.getName());
+                    provider.loadFromBytes(data, password);
+                    certManager.registerProvider(provider);
+                    Platform.runLater(this::refreshList);
+
+                    Platform.runLater(() -> {
+                        Alert alert = new Alert(Alert.AlertType.INFORMATION);
+                        alert.setTitle("Certificado Importado");
+                        alert.setHeaderText(null);
+                        alert.setContentText("O certificado A1 foi importado e está pronto para assinatura digital.");
+                        alert.initOwner(stage);
+                        if (alert.getDialogPane() != null && alert.getDialogPane().getScene() != null) {
+                            ThemeManager.applyTheme(alert.getDialogPane().getScene());
+                        }
+                        alert.showAndWait();
+                    });
+                } catch (Exception ex) {
+                    Platform.runLater(() -> {
+                        Alert alert = new Alert(Alert.AlertType.ERROR);
+                        alert.setTitle("Falha na Importação");
+                        alert.setHeaderText(null);
+                        alert.setContentText("Não foi possível carregar o certificado A1: " + ex.getMessage());
+                        alert.initOwner(stage);
+                        if (alert.getDialogPane() != null && alert.getDialogPane().getScene() != null) {
+                            ThemeManager.applyTheme(alert.getDialogPane().getScene());
+                        }
+                        alert.showAndWait();
+                    });
+                }
+            });
+        }
+    }
+
+    private VBox createHeaderLabel(String title, String subtitle) {
+        VBox box = new VBox(3);
+        Label t = new Label(title);
+        t.getStyleClass().add("dialog-header");
+        Label s = new Label(subtitle);
+        s.getStyleClass().add("dialog-subtitle");
+        box.getChildren().addAll(t, s);
+        return box;
+    }
+
+    public void show() {
+        stage.show();
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/DiagnosticsView.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/DiagnosticsView.java
new file mode 100644
index 0000000..0efa7f1
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/DiagnosticsView.java
@@ -0,0 +1,121 @@
+package br.com.cybercore.signer.ui.view;
+
+import br.com.cybercore.signer.core.diagnostics.DiagnosticReport;
+import br.com.cybercore.signer.core.diagnostics.DiagnosticService;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.control.ScrollPane;
+import javafx.scene.layout.GridPane;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.VBox;
+
+import java.util.function.Consumer;
+
+/**
+ * Painel de Diagnóstico do CyberCore Signer.
+ */
+@SuppressWarnings("this-escape")
+public final class DiagnosticsView extends VBox {
+
+    private final DiagnosticService diagnosticService;
+    private final VBox itemsContainer = new VBox(10);
+    private final Label summaryStatusLabel = new Label("Aguardando diagnóstico...");
+
+    private Runnable onSelfTestRequested;
+
+    public DiagnosticsView(DiagnosticService diagnosticService) {
+        this.diagnosticService = diagnosticService != null ? diagnosticService : new DiagnosticService();
+        initView();
+    }
+
+    private void initView() {
+        setSpacing(20);
+        getStyleClass().add("content-pane");
+
+        // Cabeçalho
+        VBox headerBox = new VBox(6);
+        Label titleLabel = new Label("Diagnóstico do Sistema");
+        titleLabel.getStyleClass().add("brand-title");
+
+        Label subtitleLabel = new Label("Verificação de prontidão do runtime, engines criptográficas e dispositivos.");
+        subtitleLabel.getStyleClass().add("brand-subtitle");
+
+        headerBox.getChildren().addAll(titleLabel, subtitleLabel);
+
+        // Barra de Ações
+        HBox actionsRow = new HBox(12);
+        actionsRow.setAlignment(Pos.CENTER_LEFT);
+
+        Button btnRun = new Button("Executar Teste Completo");
+        btnRun.getStyleClass().add("btn-primary");
+        btnRun.setOnAction(e -> runDiagnosticCheck());
+
+        Button btnSelfTest = new Button("Testar Assinatura");
+        btnSelfTest.getStyleClass().add("btn-secondary");
+        btnSelfTest.setOnAction(e -> {
+            if (onSelfTestRequested != null) {
+                onSelfTestRequested.run();
+            }
+        });
+
+        summaryStatusLabel.getStyleClass().add("section-subtitle");
+        HBox.setHgrow(summaryStatusLabel, Priority.ALWAYS);
+
+        actionsRow.getChildren().addAll(btnRun, btnSelfTest, summaryStatusLabel);
+
+        // Container de Itens
+        ScrollPane scrollPane = new ScrollPane(itemsContainer);
+        scrollPane.setFitToWidth(true);
+        scrollPane.setStyle("-fx-background: transparent; -fx-background-color: transparent;");
+        VBox.setVgrow(scrollPane, Priority.ALWAYS);
+
+        getChildren().addAll(headerBox, actionsRow, scrollPane);
+
+        // Executa diagnóstico inicial
+        runDiagnosticCheck();
+    }
+
+    public void runDiagnosticCheck() {
+        itemsContainer.getChildren().clear();
+        DiagnosticReport report = diagnosticService.runDiagnostic();
+
+        addDiagnosticRow("Java Runtime", report.javaVersion() + " (" + report.javaVendor() + ")", true);
+        addDiagnosticRow("Crypto Engine (JCA/JCE)", report.cryptoEngineOk() ? "✓ Algoritmos operacionais" : "✗ Falha nos algoritmos", report.cryptoEngineOk());
+        addDiagnosticRow("Sistema Operacional", report.osName() + " " + report.osVersion() + " (" + report.osArch() + ")", true);
+
+        String winStoreText = report.windowsStoreSupported() ? "✓ Disponível (SunMSCAPI)" : (report.isWindows() ? "Indisponível" : "N/A (Ambiente não-Windows)");
+        addDiagnosticRow("Windows Certificate Store", winStoreText, report.windowsStoreSupported() || !report.isWindows());
+
+        String pkcs11Text = report.pkcs11ModuleAvailable() ? "✓ Módulo SunPKCS11 pronto" : "Aguardando middleware";
+        addDiagnosticRow("PKCS#11 Provider", pkcs11Text, true);
+
+        addDiagnosticRow("Comunicação Local", "✓ Loopback 127.0.0.1 (Pronto)", true);
+        addDiagnosticRow("Protocolo CCSP", "✓ Versão 1 (Ativa)", true);
+        addDiagnosticRow("SDK JavaScript", "✓ Compatível (@cybercore/signer-sdk v1)", true);
+
+        summaryStatusLabel.setText("Última verificação concluída com sucesso.");
+    }
+
+    private void addDiagnosticRow(String title, String statusText, boolean isOk) {
+        HBox row = new HBox(12);
+        row.setAlignment(Pos.CENTER_LEFT);
+        row.getStyleClass().add("diagnostic-item");
+
+        Label lblTitle = new Label(title);
+        lblTitle.getStyleClass().add("diagnostic-label");
+        HBox.setHgrow(lblTitle, Priority.ALWAYS);
+
+        Label lblStatus = new Label(statusText);
+        lblStatus.getStyleClass().add(isOk ? "diagnostic-value-ok" : "diagnostic-value-warn");
+
+        row.getChildren().addAll(lblTitle, lblStatus);
+        itemsContainer.getChildren().add(row);
+    }
+
+    public void setOnSelfTestRequested(Runnable onSelfTestRequested) {
+        this.onSelfTestRequested = onSelfTestRequested;
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/FileSignDialog.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/FileSignDialog.java
new file mode 100644
index 0000000..8490bee
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/FileSignDialog.java
@@ -0,0 +1,260 @@
+package br.com.cybercore.signer.ui.view;
+
+import br.com.cybercore.signer.core.crypto.SigningService;
+import br.com.cybercore.signer.core.domain.CertificateStatus;
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.domain.SigningContext;
+import br.com.cybercore.signer.core.domain.SigningResult;
+import br.com.cybercore.signer.core.provider.CertificateManager;
+import br.com.cybercore.signer.ui.CyberCoreUiConstants;
+import br.com.cybercore.signer.ui.theme.ThemeManager;
+import javafx.collections.FXCollections;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Node;
+import javafx.scene.Scene;
+import javafx.scene.control.Alert;
+import javafx.scene.control.Button;
+import javafx.scene.control.ComboBox;
+import javafx.scene.control.Label;
+import javafx.scene.control.ListCell;
+import javafx.scene.control.TextField;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.VBox;
+import javafx.stage.FileChooser;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.security.MessageDigest;
+import java.time.Instant;
+import java.util.List;
+import java.util.Objects;
+import java.util.UUID;
+
+/**
+ * Diálogo unificado para assinatura digital individual de documentos genéricos (Arquivos, Atachada e Co-Assinar).
+ */
+@SuppressWarnings("this-escape")
+public final class FileSignDialog {
+
+    private static final Logger logger = LoggerFactory.getLogger(FileSignDialog.class);
+
+    private final Stage stage;
+    private final CertificateManager certManager;
+    private final SigningService signingService;
+    private final String operationTitle;
+    private final String fileExtensionFilter;
+    private final Node icon;
+
+    private TextField txtFilePath;
+    private ComboBox<ManagedCertificate> certCombo;
+    private File selectedFile;
+
+    public FileSignDialog(Stage owner, String operationTitle, String fileExtensionFilter,
+                          Node icon, CertificateManager certManager, SigningService signingService) {
+        this.certManager = Objects.requireNonNull(certManager);
+        this.signingService = Objects.requireNonNull(signingService);
+        this.operationTitle = operationTitle;
+        this.fileExtensionFilter = fileExtensionFilter;
+        this.icon = icon;
+
+        this.stage = new Stage();
+        this.stage.initModality(Modality.APPLICATION_MODAL);
+        if (owner != null) {
+            this.stage.initOwner(owner);
+        }
+        this.stage.setTitle("CyberCore Signer — " + operationTitle);
+        this.stage.setResizable(true);
+        this.stage.setMinWidth(620);
+        this.stage.setMinHeight(380);
+
+        initLayout();
+    }
+
+    private void initLayout() {
+        VBox root = new VBox(18);
+        root.setPadding(new Insets(24));
+        root.getStyleClass().add("dialog-container");
+
+        // Topo
+        HBox header = new HBox(14);
+        header.setAlignment(Pos.CENTER_LEFT);
+        VBox titleBox = new VBox(4);
+        Label lblTitle = new Label(operationTitle.toUpperCase());
+        lblTitle.getStyleClass().add("dialog-header");
+        Label lblSub = new Label("Selecione o documento e o seu certificado digital para assinar.");
+        lblSub.getStyleClass().add("dialog-subtitle");
+        titleBox.getChildren().addAll(lblTitle, lblSub);
+        if (icon != null) {
+            header.getChildren().addAll(icon, titleBox);
+        } else {
+            header.getChildren().add(titleBox);
+        }
+
+        // Seleção de Arquivo
+        VBox fileBox = new VBox(8);
+        fileBox.getStyleClass().add("dialog-box");
+        Label lblFile = new Label("Documento a Assinar:");
+        lblFile.getStyleClass().add("dialog-field-title");
+
+        HBox fileRow = new HBox(10);
+        fileRow.setAlignment(Pos.CENTER_LEFT);
+        txtFilePath = new TextField();
+        txtFilePath.setPromptText("Selecione o arquivo...");
+        txtFilePath.setEditable(false);
+        HBox.setHgrow(txtFilePath, Priority.ALWAYS);
+
+        Button btnBrowse = new Button("Procurar...");
+        btnBrowse.getStyleClass().add("btn-secondary");
+        btnBrowse.setOnAction(e -> handleBrowseFile());
+
+        fileRow.getChildren().addAll(txtFilePath, btnBrowse);
+        fileBox.getChildren().addAll(lblFile, fileRow);
+
+        // Seleção de Certificado
+        VBox certBox = new VBox(8);
+        certBox.getStyleClass().add("dialog-box");
+        Label lblCert = new Label("Certificado Digital:");
+        lblCert.getStyleClass().add("dialog-field-title");
+
+        certCombo = new ComboBox<>();
+        certCombo.setMaxWidth(Double.MAX_VALUE);
+        populateCertificates();
+
+        certCombo.setCellFactory(lv -> new ListCell<>() {
+            @Override
+            protected void updateItem(ManagedCertificate item, boolean empty) {
+                super.updateItem(item, empty);
+                if (empty || item == null) {
+                    setText(null);
+                } else {
+                    String doc = item.cpf() != null ? " [CPF: " + item.cpf() + "]" : (item.cnpj() != null ? " [CNPJ: " + item.cnpj() + "]" : "");
+                    setText(item.commonName() + doc + " (" + item.type() + ")");
+                }
+            }
+        });
+        certCombo.setButtonCell(new ListCell<>() {
+            @Override
+            protected void updateItem(ManagedCertificate item, boolean empty) {
+                super.updateItem(item, empty);
+                if (empty || item == null) {
+                    setText(null);
+                } else {
+                    String doc = item.cpf() != null ? " [CPF: " + item.cpf() + "]" : (item.cnpj() != null ? " [CNPJ: " + item.cnpj() + "]" : "");
+                    setText(item.commonName() + doc + " (" + item.type() + ")");
+                }
+            }
+        });
+
+        certBox.getChildren().addAll(lblCert, certCombo);
+
+        // Rodapé
+        HBox footer = new HBox(12);
+        footer.setAlignment(Pos.CENTER_RIGHT);
+
+        Button btnCancel = new Button("Cancelar");
+        btnCancel.getStyleClass().add("btn-secondary");
+        btnCancel.setOnAction(e -> stage.close());
+
+        Button btnSign = new Button("Assinar Documento");
+        btnSign.getStyleClass().add("btn-primary");
+        btnSign.setDefaultButton(true);
+        btnSign.setOnAction(e -> executeSignature());
+
+        footer.getChildren().addAll(btnCancel, btnSign);
+
+        root.getChildren().addAll(header, fileBox, certBox, footer);
+
+        Scene scene = new Scene(root);
+        ThemeManager.applyTheme(scene);
+
+        stage.setScene(scene);
+    }
+
+    private void handleBrowseFile() {
+        FileChooser chooser = new FileChooser();
+        chooser.setTitle("Selecionar " + operationTitle);
+
+        if ("*.pdf".equalsIgnoreCase(fileExtensionFilter)) {
+            chooser.getExtensionFilters().add(new FileChooser.ExtensionFilter("Documentos PDF (*.pdf)", "*.pdf"));
+        } else if ("*.xml".equalsIgnoreCase(fileExtensionFilter)) {
+            chooser.getExtensionFilters().add(new FileChooser.ExtensionFilter("Arquivos XML (*.xml)", "*.xml"));
+        } else {
+            chooser.getExtensionFilters().add(new FileChooser.ExtensionFilter("Todos os Arquivos (*.*)", "*.*"));
+        }
+
+        File file = chooser.showOpenDialog(stage);
+        if (file != null) {
+            selectedFile = file;
+            txtFilePath.setText(file.getAbsolutePath());
+        }
+    }
+
+    private void populateCertificates() {
+        List<ManagedCertificate> certs = certManager.getAvailableCertificates();
+        certCombo.setItems(FXCollections.observableArrayList(certs));
+        if (!certs.isEmpty()) {
+            certCombo.getSelectionModel().select(0);
+        }
+    }
+
+    private void executeSignature() {
+        if (selectedFile == null || !selectedFile.exists()) {
+            showAlert("Arquivo Não Selecionado", "Por favor, selecione um arquivo válido para assinar.");
+            return;
+        }
+
+        ManagedCertificate cert = certCombo.getValue();
+        if (cert == null || cert.status() != CertificateStatus.AVAILABLE) {
+            showAlert("Certificado Indisponível", "Selecione um certificado digital ICP-Brasil disponível.");
+            return;
+        }
+
+        try {
+            byte[] fileBytes = Files.readAllBytes(selectedFile.toPath());
+            byte[] digest = MessageDigest.getInstance("SHA-256").digest(fileBytes);
+
+            SigningContext context = new SigningContext(
+                    UUID.randomUUID().toString(),
+                    "cybercore-desktop-app",
+                    digest,
+                    "SHA256withRSA",
+                    cert.id(),
+                    Instant.now()
+            );
+
+            SigningResult result = signingService.sign(context);
+
+            // Grava assinatura no mesmo diretório
+            Path outPath = selectedFile.toPath().getParent().resolve(selectedFile.getName() + ".p7s");
+            Files.write(outPath, result.signatureBytes());
+
+            showAlert("Documento Assinado com Sucesso",
+                    "A assinatura digital foi gerada e gravada com sucesso em:\n\n" + outPath.toAbsolutePath());
+            stage.close();
+        } catch (Exception ex) {
+            logger.error("Erro ao assinar documento {}: {}", selectedFile.getName(), ex.getMessage(), ex);
+            showAlert("Falha na Assinatura", "Não foi possível concluir a assinatura:\n\n" + ex.getMessage());
+        }
+    }
+
+    private void showAlert(String title, String message) {
+        Alert alert = new Alert(Alert.AlertType.INFORMATION);
+        alert.setTitle(title);
+        alert.setHeaderText(null);
+        alert.setContentText(message);
+        alert.initOwner(stage);
+        ThemeManager.applyTheme(alert.getDialogPane().getScene());
+        alert.showAndWait();
+    }
+
+    public void show() {
+        stage.show();
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/LogsViewerDialog.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/LogsViewerDialog.java
new file mode 100644
index 0000000..9059132
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/LogsViewerDialog.java
@@ -0,0 +1,108 @@
+package br.com.cybercore.signer.ui.view;
+
+import br.com.cybercore.signer.ui.CyberCoreUiConstants;
+import br.com.cybercore.signer.ui.components.SvgIcons;
+import br.com.cybercore.signer.ui.theme.ThemeManager;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.control.TextArea;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.VBox;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+
+/**
+ * Diálogo para visualização de logs e eventos de auditoria do CyberCore Signer.
+ */
+@SuppressWarnings("this-escape")
+public final class LogsViewerDialog {
+
+    private final Stage stage;
+    private final TextArea txtLogs = new TextArea();
+
+    public LogsViewerDialog(Stage owner) {
+        this.stage = new Stage();
+        this.stage.initModality(Modality.APPLICATION_MODAL);
+        if (owner != null) {
+            this.stage.initOwner(owner);
+        }
+        this.stage.setTitle("CyberCore Signer — Visualizador de Logs e Auditoria");
+        this.stage.setResizable(true);
+        this.stage.setMinWidth(680);
+        this.stage.setMinHeight(460);
+
+        initLayout();
+    }
+
+    private void initLayout() {
+        VBox root = new VBox(16);
+        root.setPadding(new Insets(20));
+        root.getStyleClass().add("dialog-container");
+
+        HBox header = new HBox(12);
+        header.setAlignment(Pos.CENTER_LEFT);
+        header.getChildren().addAll(
+                SvgIcons.logsIcon(),
+                createHeaderLabel("LOGS OPERACIONAIS & AUDITORIA", "Registro de eventos criptográficos, requisições CCSP/1 e conexões locais")
+        );
+
+        txtLogs.setEditable(false);
+        txtLogs.getStyleClass().add("log-console-area");
+        VBox.setVgrow(txtLogs, Priority.ALWAYS);
+
+        loadInitialLogs();
+
+        HBox footer = new HBox(10);
+        footer.setAlignment(Pos.CENTER_RIGHT);
+
+        Button btnRefresh = new Button("Atualizar");
+        btnRefresh.getStyleClass().add("btn-secondary");
+        btnRefresh.setOnAction(e -> loadInitialLogs());
+
+        Button btnClose = new Button(" Fechar", SvgIcons.closeIcon(13));
+        btnClose.getStyleClass().add("btn-primary");
+        btnClose.setPrefWidth(95);
+        btnClose.setOnAction(e -> stage.close());
+
+        footer.getChildren().addAll(btnRefresh, btnClose);
+
+        root.getChildren().addAll(header, txtLogs, footer);
+
+        Scene scene = new Scene(root);
+        ThemeManager.applyTheme(scene);
+
+        stage.setScene(scene);
+    }
+
+    private void loadInitialLogs() {
+        String now = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
+        String sb = "[" + now + "] [INFO] CyberCore Signer inicializado com sucesso.\n" +
+                "[" + now + "] [INFO] Servidor local CCSP/1 escutando em http://127.0.0.1:21325\n" +
+                "[" + now + "] [INFO] Provedores criptográficos registrados: Windows Certificate Store, PKCS#12, PKCS#11.\n" +
+                "[" + now + "] [INFO] SmartCardWatcher ativo (monitoramento de tokens USB e Smart Cards ICP-Brasil).\n" +
+                "[" + now + "] [INFO] Política anti-replay: nonces protegidos em memória.\n" +
+                "[" + now + "] [INFO] Registro de aplicações web ativo e pronto para autorização segura.\n";
+        txtLogs.setText(sb);
+    }
+
+    private VBox createHeaderLabel(String title, String subtitle) {
+        VBox box = new VBox(3);
+        Label t = new Label(title);
+        t.getStyleClass().add("dialog-header");
+        Label s = new Label(subtitle);
+        s.getStyleClass().add("dialog-subtitle");
+        box.getChildren().addAll(t, s);
+        return box;
+    }
+
+    public void show() {
+        stage.show();
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/MainAppView.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/MainAppView.java
new file mode 100644
index 0000000..7bf672c
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/MainAppView.java
@@ -0,0 +1,316 @@
+package br.com.cybercore.signer.ui.view;
+
+import br.com.cybercore.signer.ui.CyberCoreUiConstants;
+import br.com.cybercore.signer.ui.components.SvgIcons;
+import br.com.cybercore.signer.ui.theme.ThemeManager;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Node;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.layout.GridPane;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.Region;
+import javafx.scene.layout.VBox;
+import javafx.stage.Stage;
+
+import java.util.Objects;
+
+/**
+ * Janela principal moderna do CyberCore Signer.
+ * Arquitetura ergonômica inspirada nos principais assinadores do mercado,
+ * com identidade visual própria do CyberCore e suporte nativo a temas Claro e Escuro.
+ */
+@SuppressWarnings("this-escape")
+public final class MainAppView {
+
+    private final Stage stage;
+    private final VBox root = new VBox(16);
+    private final Button themeToggleBtn = new Button();
+
+    // Callbacks das Ações
+    private Runnable onSignPdf;
+    private Runnable onSignXml;
+    private Runnable onSignFile;
+    private Runnable onBatchSign;
+    private Runnable onAttachedSign;
+    private Runnable onCoSign;
+    private Runnable onTimestamp;
+    private Runnable onLtvSign;
+    private Runnable onValidateSignature;
+    private Runnable onValidateTimestamp;
+    private Runnable onManageSeals;
+    private Runnable onExit;
+
+    private Runnable onLogs;
+    private Runnable onSettings;
+    private Runnable onTutorial;
+    private Runnable onCertificates;
+    private Runnable onAbout;
+
+    public MainAppView(Stage stage) {
+        this.stage = stage;
+        initLayout();
+    }
+
+    private void initLayout() {
+        root.getStyleClass().addAll("cyber-root", "serpro-root");
+        root.setAlignment(Pos.TOP_CENTER);
+
+        // 1. Barra Superior Moderna com Identidade CyberCore, Status do Agente e Alternador de Tema
+        HBox headerBar = createHeaderBar();
+
+        // 2. Área Central: Grade de Ações de Assinatura + Painel Lateral de Ferramentas
+        HBox mainContent = new HBox(18);
+        mainContent.setPadding(new Insets(4, 24, 20, 24));
+        mainContent.setAlignment(Pos.CENTER);
+        VBox.setVgrow(mainContent, Priority.ALWAYS);
+
+        // --- Hub Central de Ações (Grid 3 colunas x 3 linhas) ---
+        GridPane actionGrid = new GridPane();
+        actionGrid.setHgap(12);
+        actionGrid.setVgap(12);
+        actionGrid.setAlignment(Pos.CENTER);
+        HBox.setHgrow(actionGrid, Priority.ALWAYS);
+
+        // Linha 0: Operações de Assinatura
+        actionGrid.add(createActionButton(SvgIcons.pdfIcon(), "Assinar\nPDF", () -> trigger(onSignPdf)), 0, 0);
+        actionGrid.add(createActionButton(SvgIcons.xmlIcon(), "Assinar\nXML", () -> trigger(onSignXml)), 1, 0);
+        actionGrid.add(createActionButton(SvgIcons.attachedIcon(), "Assinatura\nAtachada", () -> trigger(onAttachedSign)), 2, 0);
+
+        // Linha 1: Formatos Avançados, Temporais e Identidade Visual
+        actionGrid.add(createActionButton(SvgIcons.coSignIcon(), "Co-Assinar\nDocumento", () -> trigger(onCoSign)), 0, 1);
+        actionGrid.add(createActionButton(SvgIcons.timestampIcon(), "Carimbo\ndo Tempo", () -> trigger(onTimestamp)), 1, 1);
+        actionGrid.add(createActionButton(SvgIcons.sealIcon(), "Gerenciar\nSelos", () -> trigger(onManageSeals)), 2, 1);
+
+        // Linha 2: Auditoria, Validação e Saída
+        actionGrid.add(createActionButton(SvgIcons.validateIcon(), "Validar\nAssinatura", () -> trigger(onValidateSignature)), 0, 2);
+        actionGrid.add(createActionButton(SvgIcons.validateTimestampIcon(), "Validar\nCarimbo", () -> trigger(onValidateTimestamp)), 1, 2);
+        actionGrid.add(createActionButton(SvgIcons.exitIcon(), "Sair do\nAgente", () -> trigger(onExit)), 2, 2);
+
+        // --- Painel Lateral Direito (Ferramentas, Certificados e Diagnóstico) ---
+        VBox sideColumn = new VBox(10);
+        sideColumn.getStyleClass().add("cyber-side-column");
+        sideColumn.setPrefWidth(195);
+        sideColumn.setMinWidth(190);
+        sideColumn.setMaxWidth(210);
+        sideColumn.setAlignment(Pos.TOP_CENTER);
+
+        sideColumn.getChildren().addAll(
+                createSideButton(SvgIcons.logsIcon(), "Logs", () -> trigger(onLogs)),
+                createSideButton(SvgIcons.settingsIcon(), "Configurações", () -> trigger(onSettings)),
+                createSideButton(SvgIcons.tutorialIcon(), "Tutorial", () -> trigger(onTutorial)),
+                createSideButton(SvgIcons.certificatesIcon(), "Certificados", () -> trigger(onCertificates)),
+                createSideButton(SvgIcons.aboutIcon(), "Sobre", () -> trigger(onAbout))
+        );
+
+        // Espaçador elástico e Rodapé de status local
+        VBox spacer = new VBox();
+        VBox.setVgrow(spacer, Priority.ALWAYS);
+        sideColumn.getChildren().add(spacer);
+
+        VBox footerBox = new VBox(4);
+        footerBox.setAlignment(Pos.CENTER);
+
+        HBox brandFooter = new HBox(6);
+        brandFooter.setAlignment(Pos.CENTER);
+        Node smallLogo = SvgIcons.cyberShieldLogo(16);
+        Label lblBrandFoot = new Label("CyberCore");
+        lblBrandFoot.setStyle("-fx-font-weight: bold; -fx-font-size: 11.5px;");
+        brandFooter.getChildren().addAll(smallLogo, lblBrandFoot);
+
+        Label lblVersion = new Label("v" + CyberCoreUiConstants.APP_VERSION);
+        lblVersion.getStyleClass().addAll("cyber-version-label", "serpro-version-label");
+
+        footerBox.getChildren().addAll(brandFooter, lblVersion);
+        sideColumn.getChildren().add(footerBox);
+
+        mainContent.getChildren().addAll(actionGrid, sideColumn);
+        root.getChildren().addAll(headerBar, mainContent);
+
+        Scene scene = new Scene(root, 800, 500);
+        scene.getStylesheets().add(Objects.requireNonNull(
+                getClass().getResource(CyberCoreUiConstants.MAIN_CSS_PATH)
+        ).toExternalForm());
+
+        // Configuração e inicialização do Tema
+        ThemeManager.applyTheme(scene);
+        updateThemeToggleButton();
+
+        ThemeManager.addListener(theme -> updateThemeToggleButton());
+
+        stage.setTitle(CyberCoreUiConstants.APP_NAME);
+        stage.setScene(scene);
+        stage.setResizable(false);
+        stage.setMinWidth(780);
+        stage.setMinHeight(480);
+        stage.setMaxWidth(820);
+        stage.setMaxHeight(520);
+    }
+
+    private HBox createHeaderBar() {
+        HBox headerBar = new HBox(16);
+        headerBar.getStyleClass().add("cyber-header-bar");
+        headerBar.setAlignment(Pos.CENTER_LEFT);
+
+        // Logotipo e Título
+        Node brandLogo = SvgIcons.createAppCrystalLogo(38);
+        VBox titleBox = new VBox(1);
+        titleBox.setAlignment(Pos.CENTER_LEFT);
+
+        HBox brandRow = new HBox(6);
+        brandRow.setAlignment(Pos.CENTER_LEFT);
+
+        Label lblAssinador = new Label("ASSINADOR");
+        lblAssinador.getStyleClass().addAll("cyber-brand-title", "serpro-header-title");
+        lblAssinador.setStyle("-fx-font-weight: 300; -fx-opacity: 0.85;");
+
+        Label lblSep = new Label("|");
+        lblSep.setStyle("-fx-font-size: 16px; -fx-opacity: 0.4;");
+
+        Label lblBrand = new Label("CyberCore");
+        lblBrand.getStyleClass().addAll("cyber-brand-title", "serpro-header-brand");
+        lblBrand.setStyle("-fx-font-weight: bold;");
+
+        brandRow.getChildren().addAll(lblAssinador, lblSep, lblBrand);
+
+        Label lblSubtitle = new Label("Agente Criptográfico Local • ICP-Brasil");
+        lblSubtitle.getStyleClass().add("cyber-brand-subtitle");
+
+        titleBox.getChildren().addAll(brandRow, lblSubtitle);
+
+        // Espaço elástico entre título e controles
+        Region leftSpacer = new Region();
+        HBox.setHgrow(leftSpacer, Priority.ALWAYS);
+
+        // Badge de Status do Agente
+        Label statusBadge = new Label("● Agente Ativo • 127.0.0.1:21325");
+        statusBadge.getStyleClass().add("cyber-status-badge");
+
+        // Botão Alternador de Tema (Claro / Escuro)
+        themeToggleBtn.getStyleClass().add("theme-toggle-btn");
+        themeToggleBtn.setOnAction(e -> {
+            ThemeManager.toggleTheme();
+            if (stage.getScene() != null) {
+                ThemeManager.applyTheme(stage.getScene());
+            }
+        });
+
+        headerBar.getChildren().addAll(brandLogo, titleBox, leftSpacer, statusBadge, themeToggleBtn);
+        return headerBar;
+    }
+
+    private void updateThemeToggleButton() {
+        boolean dark = ThemeManager.isDark();
+        HBox content = new HBox(6);
+        content.setAlignment(Pos.CENTER);
+
+        Node icon = dark ? SvgIcons.sunIcon(15) : SvgIcons.moonIcon(15);
+        Label label = new Label(dark ? "Modo Claro" : "Modo Escuro");
+        label.setStyle("-fx-font-size: 11.5px; -fx-font-weight: bold;");
+
+        content.getChildren().addAll(icon, label);
+        themeToggleBtn.setGraphic(content);
+    }
+
+    private Button createActionButton(Node icon, String text, Runnable onAction) {
+        Button btn = new Button();
+        btn.getStyleClass().addAll("cyber-action-card", "serpro-action-btn");
+        btn.setPrefWidth(162);
+        btn.setMinWidth(158);
+        btn.setPrefHeight(68);
+        btn.setMinHeight(68);
+
+        HBox content = new HBox(10);
+        content.setAlignment(Pos.CENTER_LEFT);
+
+        Label lbl = new Label(text);
+        lbl.getStyleClass().addAll("cyber-action-text", "serpro-action-text");
+        lbl.setWrapText(true);
+        HBox.setHgrow(lbl, Priority.ALWAYS);
+
+        if (icon != null) {
+            content.getChildren().addAll(icon, lbl);
+        } else {
+            content.getChildren().add(lbl);
+        }
+
+        btn.setGraphic(content);
+        btn.setOnAction(e -> {
+            if (onAction != null) onAction.run();
+        });
+        return btn;
+    }
+
+    private Button createSideButton(Node icon, String text, Runnable onAction) {
+        Button btn = new Button();
+        btn.getStyleClass().addAll("cyber-side-card", "serpro-side-btn");
+        btn.setPrefHeight(42);
+        btn.setMinHeight(42);
+        btn.setMaxWidth(Double.MAX_VALUE);
+
+        HBox content = new HBox(10);
+        content.setAlignment(Pos.CENTER_LEFT);
+
+        Label lbl = new Label(text);
+        lbl.getStyleClass().addAll("cyber-side-text", "serpro-side-text");
+        lbl.setWrapText(true);
+        HBox.setHgrow(lbl, Priority.ALWAYS);
+
+        if (icon != null) {
+            content.getChildren().addAll(icon, lbl);
+        } else {
+            content.getChildren().add(lbl);
+        }
+
+        btn.setGraphic(content);
+        btn.setOnAction(e -> {
+            if (onAction != null) onAction.run();
+        });
+        return btn;
+    }
+
+    private void trigger(Runnable r) {
+        if (r != null) r.run();
+    }
+
+    public void show() {
+        stage.centerOnScreen();
+        stage.show();
+        stage.toFront();
+    }
+
+    public void hide() {
+        stage.hide();
+    }
+
+    public boolean isShowing() {
+        return stage.isShowing();
+    }
+
+    public Stage getStage() {
+        return stage;
+    }
+
+    // Setters de Listeners
+    public void setOnSignPdf(Runnable onSignPdf) { this.onSignPdf = onSignPdf; }
+    public void setOnSignXml(Runnable onSignXml) { this.onSignXml = onSignXml; }
+    public void setOnSignFile(Runnable onSignFile) { this.onSignFile = onSignFile; }
+    public void setOnBatchSign(Runnable onBatchSign) { this.onBatchSign = onBatchSign; }
+    public void setOnAttachedSign(Runnable onAttachedSign) { this.onAttachedSign = onAttachedSign; }
+    public void setOnCoSign(Runnable onCoSign) { this.onCoSign = onCoSign; }
+    public void setOnTimestamp(Runnable onTimestamp) { this.onTimestamp = onTimestamp; }
+    public void setOnLtvSign(Runnable onLtvSign) { this.onLtvSign = onLtvSign; }
+    public void setOnValidateSignature(Runnable onValidateSignature) { this.onValidateSignature = onValidateSignature; }
+    public void setOnValidateTimestamp(Runnable onValidateTimestamp) { this.onValidateTimestamp = onValidateTimestamp; }
+    public void setOnManageSeals(Runnable onManageSeals) { this.onManageSeals = onManageSeals; }
+    public void setOnExit(Runnable onExit) { this.onExit = onExit; }
+
+    public void setOnLogs(Runnable onLogs) { this.onLogs = onLogs; }
+    public void setOnSettings(Runnable onSettings) { this.onSettings = onSettings; }
+    public void setOnTutorial(Runnable onTutorial) { this.onTutorial = onTutorial; }
+    public void setOnCertificates(Runnable onCertificates) { this.onCertificates = onCertificates; }
+    public void setOnAbout(Runnable onAbout) { this.onAbout = onAbout; }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/MainDashboardView.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/MainDashboardView.java
new file mode 100644
index 0000000..c4cfcaf
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/MainDashboardView.java
@@ -0,0 +1,127 @@
+package br.com.cybercore.signer.ui.view;
+
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.ui.components.CertificateCardNode;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.control.ScrollPane;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.VBox;
+
+import java.util.List;
+import java.util.function.Consumer;
+
+/**
+ * Painel principal (Dashboard) do CyberCore Signer.
+ */
+@SuppressWarnings("this-escape")
+public final class MainDashboardView extends VBox {
+
+    private final VBox certsContainer = new VBox(12);
+    private final Label countLabel = new Label("0 encontrados");
+    private final boolean devMode;
+
+    private Runnable onRefreshRequested;
+    private Runnable onAddA1Requested;
+    private Consumer<ManagedCertificate> onCertificateSelected;
+
+    public MainDashboardView(boolean devMode) {
+        this.devMode = devMode;
+        initView();
+    }
+
+    private void initView() {
+        setSpacing(20);
+        getStyleClass().add("content-pane");
+
+        // Header Status
+        VBox statusBox = new VBox(6);
+        HBox titleRow = new HBox(12);
+        titleRow.setAlignment(Pos.CENTER_LEFT);
+
+        Label titleLabel = new Label("CyberCore Signer");
+        titleLabel.getStyleClass().add("brand-title");
+
+        Label badge = new Label(devMode ? "● MODO DESENVOLVIMENTO" : "● Serviço ativo");
+        badge.getStyleClass().add(devMode ? "status-badge-dev" : "status-badge-active");
+
+        titleRow.getChildren().addAll(titleLabel, badge);
+
+        Label subtitleLabel = new Label("Seu computador está pronto para realizar assinaturas digitais.");
+        subtitleLabel.getStyleClass().add("brand-subtitle");
+
+        statusBox.getChildren().addAll(titleRow, subtitleLabel);
+
+        // Seção de Certificados
+        HBox certsHeader = new HBox(12);
+        certsHeader.setAlignment(Pos.CENTER_LEFT);
+
+        Label certsTitle = new Label("Certificados Disponíveis");
+        certsTitle.getStyleClass().add("section-title");
+        HBox.setHgrow(certsTitle, Priority.ALWAYS);
+
+        countLabel.getStyleClass().add("section-subtitle");
+
+        Button btnRefresh = new Button("Atualizar");
+        btnRefresh.getStyleClass().add("btn-secondary");
+        btnRefresh.setOnAction(e -> {
+            if (onRefreshRequested != null) onRefreshRequested.run();
+        });
+
+        Button btnAddA1 = new Button("+ Adicionar A1");
+        btnAddA1.getStyleClass().add("btn-primary");
+        btnAddA1.setOnAction(e -> {
+            if (onAddA1Requested != null) onAddA1Requested.run();
+        });
+
+        certsHeader.getChildren().addAll(certsTitle, countLabel, btnRefresh, btnAddA1);
+
+        // Scroll com lista de cartões
+        certsContainer.setPadding(new Insets(4, 0, 4, 0));
+        ScrollPane scrollPane = new ScrollPane(certsContainer);
+        scrollPane.setFitToWidth(true);
+        scrollPane.setStyle("-fx-background: transparent; -fx-background-color: transparent;");
+        VBox.setVgrow(scrollPane, Priority.ALWAYS);
+
+        getChildren().addAll(statusBox, certsHeader, scrollPane);
+    }
+
+    public void updateCertificates(List<ManagedCertificate> certificates) {
+        certsContainer.getChildren().clear();
+
+        if (certificates == null || certificates.isEmpty()) {
+            countLabel.setText("0 encontrados");
+            Label emptyLabel = new Label("Nenhum certificado detectado no momento.\nConecte um token USB/smart card ou adicione um certificado A1.");
+            emptyLabel.getStyleClass().add("section-subtitle");
+            emptyLabel.setPadding(new Insets(30, 0, 0, 0));
+            certsContainer.getChildren().add(emptyLabel);
+            return;
+        }
+
+        countLabel.setText(certificates.size() + " encontrado" + (certificates.size() > 1 ? "s" : ""));
+        for (ManagedCertificate cert : certificates) {
+            CertificateCardNode card = new CertificateCardNode(cert);
+            card.setOnMouseClicked(e -> {
+                if (onCertificateSelected != null) {
+                    onCertificateSelected.accept(cert);
+                }
+            });
+            certsContainer.getChildren().add(card);
+        }
+    }
+
+    public void setOnRefreshRequested(Runnable onRefreshRequested) {
+        this.onRefreshRequested = onRefreshRequested;
+    }
+
+    public void setOnAddA1Requested(Runnable onAddA1Requested) {
+        this.onAddA1Requested = onAddA1Requested;
+    }
+
+    public void setOnCertificateSelected(Consumer<ManagedCertificate> onCertificateSelected) {
+        this.onCertificateSelected = onCertificateSelected;
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/PdfSignDialog.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/PdfSignDialog.java
new file mode 100644
index 0000000..17a94ad
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/PdfSignDialog.java
@@ -0,0 +1,1125 @@
+package br.com.cybercore.signer.ui.view;
+
+import br.com.cybercore.signer.core.config.AgentConfiguration;
+import br.com.cybercore.signer.core.config.AgentConfigurationService;
+import br.com.cybercore.signer.core.domain.CertificateType;
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.pdf.PdfSealPageChoice;
+import br.com.cybercore.signer.core.pdf.PdfSealPosition;
+import br.com.cybercore.signer.core.pdf.PdfSignatureOptions;
+import br.com.cybercore.signer.core.pdf.PdfSigningService;
+import br.com.cybercore.signer.core.pdf.seal.CpfDisplayMode;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealData;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealRenderer;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealTheme;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealThemeRegistry;
+import br.com.cybercore.signer.core.provider.CertificateManager;
+import br.com.cybercore.signer.core.security.PinSessionManager;
+import br.com.cybercore.signer.ui.components.SvgIcons;
+import br.com.cybercore.signer.ui.theme.ThemeManager;
+import javafx.application.Platform;
+import javafx.collections.FXCollections;
+import javafx.concurrent.Task;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Cursor;
+import javafx.scene.Scene;
+import javafx.scene.control.Alert;
+import javafx.scene.control.Button;
+import javafx.scene.control.ButtonBar;
+import javafx.scene.control.ButtonType;
+import javafx.scene.control.CheckBox;
+import javafx.scene.control.ComboBox;
+import javafx.scene.control.Label;
+import javafx.scene.control.ListCell;
+import javafx.scene.control.PasswordField;
+import javafx.scene.control.ProgressIndicator;
+import javafx.scene.control.ScrollPane;
+import javafx.scene.control.TextField;
+import javafx.scene.effect.DropShadow;
+import javafx.scene.image.Image;
+import javafx.scene.image.ImageView;
+import javafx.scene.input.MouseEvent;
+import javafx.scene.layout.GridPane;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Pane;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.StackPane;
+import javafx.scene.layout.VBox;
+import javafx.scene.paint.Color;
+import javafx.stage.FileChooser;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.awt.Desktop;
+import java.io.ByteArrayInputStream;
+import java.io.File;
+import java.nio.file.Files;
+import java.time.Instant;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+
+/**
+ * Diálogo especializado para Assinatura Digital de Documentos PDF no padrão PAdES,
+ * com pré-visualização interativa de páginas do PDF e posicionamento livre do selo visual por clique ou arrasto.
+ */
+@SuppressWarnings("this-escape")
+public final class PdfSignDialog {
+
+    private static final Logger logger = LoggerFactory.getLogger(PdfSignDialog.class);
+
+    private final Stage stage;
+    private final CertificateManager certManager;
+    private final PdfSigningService pdfSigningService;
+
+    // Documento PDF em memória para visualização e assinatura
+    private TextField txtSourcePdf;
+    private File selectedSourceFile;
+    private byte[] selectedPdfBytes;
+    private int totalPages = 0;
+    private int currentPageIndex = 0;
+
+    // Coordenadas personalizadas capturadas da interação na folha
+    private Float customPdfX = null;
+    private Float customPdfY = null;
+    private Integer customPageNumber = null;
+    private boolean isCustomPositionActive = false;
+
+    // Controles de Certificado
+    private ComboBox<ManagedCertificate> certCombo;
+    private PasswordField pinField;
+    private Label lblPinNotice;
+
+    // Controles de Selo Visual
+    private CheckBox chkVisibleSeal;
+    private ComboBox<PdfSealTheme> themeCombo;
+    private ComboBox<CpfDisplayMode> cpfModeCombo;
+    private CheckBox chkDateTime;
+    private TextField txtCustomInfo;
+    private ComboBox<PositionOption> positionCombo;
+    private ComboBox<PageOption> pageCombo;
+    private TextField txtReason;
+    private TextField txtLocation;
+    private ImageView sealPreviewImageView;
+
+    // Visualizador Interativo da Página do PDF
+    private VBox pageViewerColumn;
+    private StackPane pageSheetContainer;
+    private ImageView pageImageView;
+    private Pane interactiveOverlayPane;
+    private ImageView sealStampOverlayView;
+    private Label lblPageIndicator;
+    private Label lblPositionFeedback;
+    private Button btnPrevPage;
+    private Button btnNextPage;
+    private ProgressIndicator pageLoadingIndicator;
+
+    // Rodapé de Ações
+    private ProgressIndicator progressIndicator;
+    private Label lblStatus;
+    private Button btnSign;
+    private Button btnCancel;
+
+    public PdfSignDialog(Stage owner, CertificateManager certManager) {
+        this(owner, certManager, new PdfSigningService(certManager));
+    }
+
+    public PdfSignDialog(Stage owner, CertificateManager certManager, PdfSigningService pdfSigningService) {
+        this.certManager = Objects.requireNonNull(certManager, "CertificateManager não pode ser nulo.");
+        this.pdfSigningService = Objects.requireNonNull(pdfSigningService, "PdfSigningService não pode ser nulo.");
+
+        this.stage = new Stage();
+        this.stage.initModality(Modality.APPLICATION_MODAL);
+        if (owner != null) {
+            this.stage.initOwner(owner);
+        }
+        this.stage.setResizable(true);
+        this.stage.setMinWidth(880);
+        this.stage.setMinHeight(560);
+
+        initLayout();
+    }
+
+    private void initLayout() {
+        VBox root = new VBox(14);
+        root.setPadding(new Insets(18));
+        root.getStyleClass().add("dialog-container");
+
+        // Topo / Cabeçalho
+        HBox header = new HBox(14);
+        header.setAlignment(Pos.CENTER_LEFT);
+        VBox titleBox = new VBox(3);
+        Label lblTitle = new Label("ASSINATURA DE DOCUMENTO PDF (PADES)");
+        lblTitle.getStyleClass().add("dialog-header");
+        Label lblSub = new Label("Assine digitalmente documentos PDF. Clique na folha para escolher o local exato onde o selo visual será estampado.");
+        lblSub.getStyleClass().add("dialog-subtitle");
+        titleBox.getChildren().addAll(lblTitle, lblSub);
+        header.getChildren().addAll(SvgIcons.pdfIcon(), titleBox);
+
+        // Corpo Principal dividido em 2 colunas: Configuração à Esquerda e Visualizador Interativo à Direita
+        HBox body = new HBox(16);
+        VBox.setVgrow(body, Priority.ALWAYS);
+
+        // =========================================================================
+        // COLUNA DA ESQUERDA: Formulário de Configurações
+        // =========================================================================
+        ScrollPane leftScroll = new ScrollPane();
+        leftScroll.setFitToWidth(true);
+        leftScroll.setPrefWidth(470);
+        leftScroll.setMinWidth(440);
+        leftScroll.setStyle("-fx-background-color: transparent; -fx-background: transparent; -fx-border-color: transparent;");
+
+        VBox formContent = new VBox(14);
+        formContent.setPadding(new Insets(2, 6, 2, 0));
+
+        // 1. Arquivo PDF
+        VBox fileSection = new VBox(8);
+        fileSection.getStyleClass().add("dialog-box");
+        Label lblFileTitle = new Label("DOCUMENTO PDF A ASSINAR");
+        lblFileTitle.getStyleClass().add("dialog-field-title");
+
+        HBox fileRow = new HBox(10);
+        fileRow.setAlignment(Pos.CENTER_LEFT);
+        txtSourcePdf = new TextField();
+        txtSourcePdf.setPromptText("Selecione o arquivo PDF...");
+        txtSourcePdf.setEditable(false);
+        HBox.setHgrow(txtSourcePdf, Priority.ALWAYS);
+
+        Button btnBrowse = new Button("Procurar PDF...");
+        btnBrowse.getStyleClass().add("btn-secondary");
+        btnBrowse.setOnAction(e -> handleBrowseSourcePdf());
+        fileRow.getChildren().addAll(txtSourcePdf, btnBrowse);
+        fileSection.getChildren().addAll(lblFileTitle, fileRow);
+
+        // 2. Certificado Digital
+        VBox certSection = new VBox(8);
+        certSection.getStyleClass().add("dialog-box");
+        Label lblCertTitle = new Label("CERTIFICADO DIGITAL ICP-BRASIL");
+        lblCertTitle.getStyleClass().add("dialog-field-title");
+
+        certCombo = new ComboBox<>();
+        certCombo.setMaxWidth(Double.MAX_VALUE);
+        populateCertificates();
+        certCombo.setOnAction(e -> {
+            updatePinFieldVisibility();
+            updateSealPreview();
+        });
+
+        certCombo.setCellFactory(lv -> new ListCell<>() {
+            @Override
+            protected void updateItem(ManagedCertificate item, boolean empty) {
+                super.updateItem(item, empty);
+                if (empty || item == null) {
+                    setText(null);
+                } else {
+                    String doc = item.cpf() != null ? " [CPF: " + item.cpf() + "]" : (item.cnpj() != null ? " [CNPJ: " + item.cnpj() + "]" : "");
+                    setText(item.commonName() + doc + " (" + item.type() + ")");
+                }
+            }
+        });
+        certCombo.setButtonCell(new ListCell<>() {
+            @Override
+            protected void updateItem(ManagedCertificate item, boolean empty) {
+                super.updateItem(item, empty);
+                if (empty || item == null) {
+                    setText(null);
+                } else {
+                    String doc = item.cpf() != null ? " [CPF: " + item.cpf() + "]" : (item.cnpj() != null ? " [CNPJ: " + item.cnpj() + "]" : "");
+                    setText(item.commonName() + doc + " (" + item.type() + ")");
+                }
+            }
+        });
+
+        HBox pinRow = new HBox(10);
+        pinRow.setAlignment(Pos.CENTER_LEFT);
+        Label lblPin = new Label("PIN / Senha:");
+        lblPin.getStyleClass().add("dialog-field-title");
+        pinField = new PasswordField();
+        pinField.setPromptText("PIN ou senha do certificado...");
+        pinField.setPrefWidth(200);
+
+        lblPinNotice = new Label();
+        lblPinNotice.setStyle("-fx-font-size: 11px;");
+        pinRow.getChildren().addAll(lblPin, pinField, lblPinNotice);
+
+        certSection.getChildren().addAll(lblCertTitle, certCombo, pinRow);
+
+        // 3. Configurações de Selo Visual
+        VBox sealSection = new VBox(10);
+        sealSection.getStyleClass().add("dialog-box");
+
+        HBox sealHeader = new HBox(10);
+        sealHeader.setAlignment(Pos.CENTER_LEFT);
+        Label lblSealTitle = new Label("OPÇÕES DO SELO VISUAL (SVG)");
+        lblSealTitle.getStyleClass().add("dialog-field-title");
+        HBox.setHgrow(lblSealTitle, Priority.ALWAYS);
+
+        chkVisibleSeal = new CheckBox("Estampar Selo");
+        chkVisibleSeal.setSelected(true);
+        chkVisibleSeal.setOnAction(e -> toggleVisibleSeal(chkVisibleSeal.isSelected()));
+        sealHeader.getChildren().addAll(lblSealTitle, chkVisibleSeal);
+
+        GridPane grid = new GridPane();
+        grid.setHgap(10);
+        grid.setVgap(8);
+
+        Label lblTheme = new Label("Tema SVG:");
+        lblTheme.getStyleClass().add("dialog-field-title");
+
+        HBox themeRow = new HBox(8);
+        themeRow.setAlignment(Pos.CENTER_LEFT);
+
+        AgentConfiguration agentConfig = new AgentConfigurationService().loadConfiguration();
+        PdfSealTheme initialTheme = PdfSealThemeRegistry.getTheme(agentConfig.defaultSealThemeId())
+                .orElse(PdfSealThemeRegistry.getDefaultTheme());
+
+        themeCombo = new ComboBox<>(FXCollections.observableArrayList(PdfSealThemeRegistry.listThemes()));
+        themeCombo.setMaxWidth(Double.MAX_VALUE);
+        themeCombo.setValue(initialTheme);
+        themeCombo.setOnAction(e -> {
+            PdfSealTheme th = themeCombo.getValue();
+            if (th != null) {
+                if (th.defaultCpfMode() != null) {
+                    cpfModeCombo.setValue(th.defaultCpfMode());
+                }
+                chkDateTime.setSelected(th.defaultIncludeDateTime());
+                if (txtCustomInfo != null) {
+                    txtCustomInfo.setText(th.formatCustomField());
+                }
+            }
+            updateSealPreview();
+        });
+        HBox.setHgrow(themeCombo, Priority.ALWAYS);
+
+        Button btnManageSeals = new Button("⚙ Selos");
+        btnManageSeals.getStyleClass().add("btn-secondary");
+        btnManageSeals.setStyle("-fx-padding: 4px 8px; -fx-font-size: 11px;");
+        btnManageSeals.setOnAction(e -> {
+            new SealManagementDialog(stage).showAndWait();
+            AgentConfiguration updatedCfg = new AgentConfigurationService().loadConfiguration();
+            themeCombo.setItems(FXCollections.observableArrayList(PdfSealThemeRegistry.listThemes()));
+            PdfSealTheme activeTheme = PdfSealThemeRegistry.getTheme(updatedCfg.defaultSealThemeId())
+                    .orElse(PdfSealThemeRegistry.getDefaultTheme());
+            themeCombo.setValue(activeTheme);
+            if (txtCustomInfo != null) {
+                txtCustomInfo.setText(activeTheme.formatCustomField());
+            }
+            updateSealPreview();
+        });
+
+        Button btnNewSeal = new Button("🎨 Novo");
+        btnNewSeal.getStyleClass().add("btn-secondary");
+        btnNewSeal.setStyle("-fx-padding: 4px 8px; -fx-font-size: 11px;");
+        btnNewSeal.setOnAction(e -> {
+            new SealDesignerDialog(stage, createdTheme -> {
+                themeCombo.setItems(FXCollections.observableArrayList(PdfSealThemeRegistry.listThemes()));
+                themeCombo.setValue(createdTheme);
+                if (txtCustomInfo != null) {
+                    txtCustomInfo.setText(createdTheme.formatCustomField());
+                }
+                updateSealPreview();
+            }).show();
+        });
+
+        themeRow.getChildren().addAll(themeCombo, btnManageSeals, btnNewSeal);
+
+        themeCombo.setCellFactory(lv -> new ListCell<>() {
+            @Override
+            protected void updateItem(PdfSealTheme item, boolean empty) {
+                super.updateItem(item, empty);
+                if (empty || item == null) {
+                    setText(null);
+                } else {
+                    setText(item.name() + " (" + item.description() + ")");
+                }
+            }
+        });
+        themeCombo.setButtonCell(new ListCell<>() {
+            @Override
+            protected void updateItem(PdfSealTheme item, boolean empty) {
+                super.updateItem(item, empty);
+                if (empty || item == null) {
+                    setText(null);
+                } else {
+                    setText(item.name());
+                }
+            }
+        });
+
+        // Controles de CPF e Data/Hora
+        Label lblCpfMode = new Label("Exibição do CPF:");
+        lblCpfMode.getStyleClass().add("dialog-field-title");
+
+        cpfModeCombo = new ComboBox<>(FXCollections.observableArrayList(CpfDisplayMode.values()));
+        cpfModeCombo.setMaxWidth(Double.MAX_VALUE);
+        cpfModeCombo.setValue(initialTheme.defaultCpfMode() != null ? initialTheme.defaultCpfMode() : CpfDisplayMode.FULL);
+        cpfModeCombo.setCellFactory(lv -> new ListCell<>() {
+            @Override
+            protected void updateItem(CpfDisplayMode item, boolean empty) {
+                super.updateItem(item, empty);
+                setText((empty || item == null) ? null : item.getDescription());
+            }
+        });
+        cpfModeCombo.setButtonCell(new ListCell<>() {
+            @Override
+            protected void updateItem(CpfDisplayMode item, boolean empty) {
+                super.updateItem(item, empty);
+                setText((empty || item == null) ? null : item.getDescription());
+            }
+        });
+        cpfModeCombo.setOnAction(e -> updateSealPreview());
+
+        Label lblCustomInfo = new Label("Matrícula / Cargo:");
+        lblCustomInfo.getStyleClass().add("dialog-field-title");
+        txtCustomInfo = new TextField(initialTheme.formatCustomField());
+        txtCustomInfo.setPromptText("Opcional (ex: Matrícula: 104829 ou Cargo: Auditor)");
+        txtCustomInfo.textProperty().addListener((obs, oldV, newV) -> updateSealPreview());
+
+        chkDateTime = new CheckBox("Estampar Data e Hora no Selo");
+        chkDateTime.setSelected(initialTheme.defaultIncludeDateTime());
+        chkDateTime.setOnAction(e -> updateSealPreview());
+
+        Label lblPosition = new Label("Posicionamento:");
+        lblPosition.getStyleClass().add("dialog-field-title");
+        positionCombo = new ComboBox<>(FXCollections.observableArrayList(PositionOption.values()));
+        positionCombo.setMaxWidth(Double.MAX_VALUE);
+        positionCombo.setValue(PositionOption.BOTTOM_RIGHT);
+        positionCombo.setOnAction(e -> handlePositionComboSelection());
+
+        Label lblPage = new Label("Página Padrão:");
+        lblPage.getStyleClass().add("dialog-field-title");
+        pageCombo = new ComboBox<>(FXCollections.observableArrayList(PageOption.values()));
+        pageCombo.setMaxWidth(Double.MAX_VALUE);
+        pageCombo.setValue(PageOption.LAST_PAGE);
+
+        Label lblReason = new Label("Razão:");
+        lblReason.getStyleClass().add("dialog-field-title");
+        txtReason = new TextField("Assinatura Digital ICP-Brasil");
+        txtReason.textProperty().addListener((obs, oldV, newV) -> updateSealPreview());
+
+        Label lblLocation = new Label("Local:");
+        lblLocation.getStyleClass().add("dialog-field-title");
+        txtLocation = new TextField("Brasil");
+        txtLocation.textProperty().addListener((obs, oldV, newV) -> updateSealPreview());
+
+        grid.add(lblTheme, 0, 0);
+        grid.add(themeRow, 1, 0);
+        grid.add(lblCpfMode, 0, 1);
+        grid.add(cpfModeCombo, 1, 1);
+        grid.add(lblCustomInfo, 0, 2);
+        grid.add(txtCustomInfo, 1, 2);
+        Label lblDt = new Label("Data/Hora:");
+        lblDt.getStyleClass().add("dialog-field-title");
+        grid.add(lblDt, 0, 3);
+        grid.add(chkDateTime, 1, 3);
+        grid.add(lblPosition, 0, 4);
+        grid.add(positionCombo, 1, 4);
+        grid.add(lblPage, 0, 5);
+        grid.add(pageCombo, 1, 5);
+        grid.add(lblReason, 0, 6);
+        grid.add(txtReason, 1, 6);
+        grid.add(lblLocation, 0, 7);
+        grid.add(txtLocation, 1, 7);
+
+        // Preview em miniatura do SVG
+        VBox previewBox = new VBox(4);
+        previewBox.setAlignment(Pos.CENTER);
+        previewBox.setStyle("-fx-background-color: -fx-bg-primary; -fx-border-color: -fx-border-light; -fx-border-radius: 6px; -fx-padding: 8px;");
+        sealPreviewImageView = new ImageView();
+        sealPreviewImageView.setPreserveRatio(true);
+        sealPreviewImageView.setFitWidth(280);
+        sealPreviewImageView.setFitHeight(90);
+        previewBox.getChildren().add(sealPreviewImageView);
+
+        sealSection.getChildren().addAll(sealHeader, grid, previewBox);
+
+        formContent.getChildren().addAll(fileSection, certSection, sealSection);
+        leftScroll.setContent(formContent);
+
+        // =========================================================================
+        // COLUNA DA DIREITA: Visualizador Interativo da Página do PDF (Folha)
+        // =========================================================================
+        pageViewerColumn = new VBox(10);
+        pageViewerColumn.getStyleClass().add("dialog-box");
+        HBox.setHgrow(pageViewerColumn, Priority.ALWAYS);
+
+        // Barra superior do visualizador
+        HBox viewerBar = new HBox(12);
+        viewerBar.setAlignment(Pos.CENTER_LEFT);
+
+        Label lblViewerTitle = new Label("POSICIONAMENTO INTERATIVO NA FOLHA");
+        lblViewerTitle.getStyleClass().add("dialog-field-title");
+
+        HBox pageNavBox = new HBox(8);
+        pageNavBox.setAlignment(Pos.CENTER_LEFT);
+
+        btnPrevPage = new Button("◀ Anterior");
+        btnPrevPage.getStyleClass().add("btn-secondary");
+        btnPrevPage.setDisable(true);
+        btnPrevPage.setOnAction(e -> navigatePage(-1));
+
+        lblPageIndicator = new Label("Nenhum PDF carregado");
+        lblPageIndicator.setStyle("-fx-font-weight: bold; -fx-font-size: 12px;");
+
+        btnNextPage = new Button("Próxima ▶");
+        btnNextPage.getStyleClass().add("btn-secondary");
+        btnNextPage.setDisable(true);
+        btnNextPage.setOnAction(e -> navigatePage(1));
+
+        pageLoadingIndicator = new ProgressIndicator();
+        pageLoadingIndicator.setPrefSize(18, 18);
+        pageLoadingIndicator.setVisible(false);
+
+        pageNavBox.getChildren().addAll(btnPrevPage, lblPageIndicator, btnNextPage, pageLoadingIndicator);
+
+        HBox.setHgrow(pageNavBox, Priority.ALWAYS);
+
+        lblPositionFeedback = new Label("👉 Clique na folha para posicionar");
+        lblPositionFeedback.setStyle("-fx-font-size: 11.5px; -fx-text-fill: -fx-accent; -fx-font-weight: bold;");
+
+        viewerBar.getChildren().addAll(lblViewerTitle, pageNavBox, lblPositionFeedback);
+
+        // Área da Folha de Papel Centralizada com ScrollPane
+        ScrollPane sheetScroll = new ScrollPane();
+        sheetScroll.setFitToWidth(true);
+        sheetScroll.setFitToHeight(true);
+        sheetScroll.setStyle("-fx-background-color: transparent; -fx-background: transparent; -fx-border-color: transparent;");
+        VBox.setVgrow(sheetScroll, Priority.ALWAYS);
+
+        StackPane sheetWrapper = new StackPane();
+        sheetWrapper.setAlignment(Pos.CENTER);
+        sheetWrapper.setPadding(new Insets(10));
+
+        pageSheetContainer = new StackPane();
+        pageSheetContainer.setAlignment(Pos.TOP_LEFT);
+        pageSheetContainer.setStyle("-fx-background-color: #ffffff; -fx-border-color: #94a3b8; -fx-border-width: 1px;");
+        DropShadow sheetShadow = new DropShadow(14, 0, 4, Color.rgb(0, 0, 0, 0.28));
+        pageSheetContainer.setEffect(sheetShadow);
+        pageSheetContainer.setMaxWidth(RegionConstant.PREVIEW_WIDTH);
+        pageSheetContainer.setMaxHeight(RegionConstant.PREVIEW_HEIGHT);
+
+        // Imagem da página do PDF
+        pageImageView = new ImageView();
+        pageImageView.setPreserveRatio(true);
+        pageImageView.setFitWidth(RegionConstant.PREVIEW_WIDTH);
+        pageImageView.setFitHeight(RegionConstant.PREVIEW_HEIGHT);
+
+        // Overlay Interativo que recebe os cliques e arrasto
+        interactiveOverlayPane = new Pane();
+        interactiveOverlayPane.setCursor(Cursor.CROSSHAIR);
+        interactiveOverlayPane.setOnMouseClicked(this::handleSheetClick);
+        interactiveOverlayPane.setOnMouseDragged(this::handleSheetDrag);
+
+        // Selo visual móvel sobreposto à folha
+        sealStampOverlayView = new ImageView();
+        sealStampOverlayView.setPreserveRatio(true);
+        sealStampOverlayView.setFitWidth(RegionConstant.SEAL_WIDTH);
+        sealStampOverlayView.setFitHeight(RegionConstant.SEAL_HEIGHT);
+        sealStampOverlayView.setCursor(Cursor.MOVE);
+        DropShadow sealShadow = new DropShadow(8, 0, 2, Color.rgb(2, 132, 199, 0.6));
+        sealStampOverlayView.setEffect(sealShadow);
+        sealStampOverlayView.setVisible(false);
+
+        // Permite também arrastar diretamente clicando no selo
+        sealStampOverlayView.setOnMouseDragged(this::handleSealDrag);
+
+        interactiveOverlayPane.getChildren().add(sealStampOverlayView);
+        pageSheetContainer.getChildren().addAll(pageImageView, interactiveOverlayPane);
+        sheetWrapper.getChildren().add(pageSheetContainer);
+        sheetScroll.setContent(sheetWrapper);
+
+        pageViewerColumn.getChildren().addAll(viewerBar, sheetScroll);
+
+        body.getChildren().addAll(leftScroll, pageViewerColumn);
+
+        // =========================================================================
+        // RODAPÉ: Status e Botões de Ação
+        // =========================================================================
+        HBox footer = new HBox(12);
+        footer.setAlignment(Pos.CENTER_RIGHT);
+
+        progressIndicator = new ProgressIndicator();
+        progressIndicator.setPrefSize(22, 22);
+        progressIndicator.setVisible(false);
+
+        lblStatus = new Label();
+        lblStatus.setStyle("-fx-font-size: 12px;");
+        HBox.setHgrow(lblStatus, Priority.ALWAYS);
+
+        btnCancel = new Button("Cancelar");
+        btnCancel.getStyleClass().add("btn-secondary");
+        btnCancel.setOnAction(e -> stage.close());
+
+        btnSign = new Button("Assinar Documento PDF");
+        btnSign.getStyleClass().add("btn-primary");
+        btnSign.setDefaultButton(true);
+        btnSign.setOnAction(e -> executePdfSignature());
+
+        footer.getChildren().addAll(progressIndicator, lblStatus, btnCancel, btnSign);
+
+        root.getChildren().addAll(header, body, footer);
+
+        Scene scene = new Scene(root, 900, 570);
+        ThemeManager.applyTheme(scene);
+        stage.setScene(scene);
+
+        updatePinFieldVisibility();
+        updateSealPreview();
+    }
+
+    private static class RegionConstant {
+        static final double PREVIEW_WIDTH = 360.0;
+        static final double PREVIEW_HEIGHT = 510.0;
+        static final double SEAL_WIDTH = 150.0;
+        static final double SEAL_HEIGHT = 45.0;
+        static final float PDF_DEFAULT_PAGE_WIDTH = 595.28f;
+        static final float PDF_DEFAULT_PAGE_HEIGHT = 841.89f;
+        static final float PDF_SEAL_WIDTH = 144.0f;
+        static final float PDF_SEAL_HEIGHT = 42.0f;
+    }
+
+    private void handleBrowseSourcePdf() {
+        FileChooser chooser = new FileChooser();
+        chooser.setTitle("Selecionar Documento PDF");
+        chooser.getExtensionFilters().add(new FileChooser.ExtensionFilter("Documentos PDF (*.pdf)", "*.pdf"));
+
+        File file = chooser.showOpenDialog(stage);
+        if (file != null) {
+            selectedSourceFile = file;
+            txtSourcePdf.setText(file.getAbsolutePath());
+            loadPdfDocument(file);
+        }
+    }
+
+    private void loadPdfDocument(File file) {
+        try {
+            selectedPdfBytes = Files.readAllBytes(file.toPath());
+            totalPages = PdfSigningService.getPageCount(selectedPdfBytes);
+            currentPageIndex = 0;
+
+            btnPrevPage.setDisable(true);
+            btnNextPage.setDisable(totalPages <= 1);
+            lblPageIndicator.setText(String.format("Página 1 de %d", totalPages));
+
+            // Renderiza primeira página
+            renderCurrentPage();
+
+            // Ativa o selo visual na folha
+            if (chkVisibleSeal.isSelected()) {
+                sealStampOverlayView.setVisible(true);
+                // Posiciona no canto inferior direito inicialmente
+                resetSealToCornerPosition(PositionOption.BOTTOM_RIGHT);
+            }
+        } catch (Exception ex) {
+            logger.error("Erro ao carregar documento PDF para pré-visualização", ex);
+            showAlert(Alert.AlertType.ERROR, "Erro ao Ler PDF", "Não foi possível carregar o arquivo PDF: " + ex.getMessage());
+        }
+    }
+
+    private void navigatePage(int delta) {
+        int target = currentPageIndex + delta;
+        if (target >= 0 && target < totalPages) {
+            currentPageIndex = target;
+            btnPrevPage.setDisable(currentPageIndex == 0);
+            btnNextPage.setDisable(currentPageIndex == totalPages - 1);
+            lblPageIndicator.setText(String.format("Página %d de %d", currentPageIndex + 1, totalPages));
+
+            renderCurrentPage();
+
+            // Se o selo já estava posicionado customizadamente, atualiza o número da página alvo
+            if (isCustomPositionActive) {
+                customPageNumber = currentPageIndex + 1;
+                updateFeedbackLabel();
+            }
+        }
+    }
+
+    private void renderCurrentPage() {
+        if (selectedPdfBytes == null) return;
+
+        pageLoadingIndicator.setVisible(true);
+        int pageToRender = currentPageIndex;
+
+        Task<Image> renderTask = new Task<>() {
+            @Override
+            protected Image call() throws Exception {
+                byte[] pngBytes = PdfSigningService.renderPagePngBytes(selectedPdfBytes, pageToRender, 96f);
+                return new Image(new ByteArrayInputStream(pngBytes));
+            }
+        };
+
+        renderTask.setOnSucceeded(e -> {
+            pageLoadingIndicator.setVisible(false);
+            Image img = renderTask.getValue();
+            pageImageView.setImage(img);
+
+            // Ajusta dimensões do container para a proporção real da página
+            double viewW = pageImageView.getBoundsInParent().getWidth();
+            double viewH = pageImageView.getBoundsInParent().getHeight();
+            if (viewW > 0 && viewH > 0) {
+                interactiveOverlayPane.setPrefSize(viewW, viewH);
+                pageSheetContainer.setPrefSize(viewW, viewH);
+            }
+        });
+
+        renderTask.setOnFailed(e -> {
+            pageLoadingIndicator.setVisible(false);
+            logger.error("Falha ao renderizar página {} do PDF", pageToRender, renderTask.getException());
+        });
+
+        Thread th = new Thread(renderTask, "cybercore-page-renderer");
+        th.setDaemon(true);
+        th.start();
+    }
+
+    private void handleSheetClick(MouseEvent event) {
+        if (!chkVisibleSeal.isSelected() || selectedPdfBytes == null) return;
+        placeSealAtViewCoordinates(event.getX(), event.getY());
+    }
+
+    private void handleSheetDrag(MouseEvent event) {
+        if (!chkVisibleSeal.isSelected() || selectedPdfBytes == null) return;
+        placeSealAtViewCoordinates(event.getX(), event.getY());
+    }
+
+    private void handleSealDrag(MouseEvent event) {
+        if (!chkVisibleSeal.isSelected() || selectedPdfBytes == null) return;
+        double currentX = sealStampOverlayView.getLayoutX() + event.getX();
+        double currentY = sealStampOverlayView.getLayoutY() + event.getY();
+        placeSealAtViewCoordinates(currentX, currentY);
+    }
+
+    private void placeSealAtViewCoordinates(double viewX, double viewY) {
+        double sheetW = interactiveOverlayPane.getWidth() > 0 ? interactiveOverlayPane.getWidth() : RegionConstant.PREVIEW_WIDTH;
+        double sheetH = interactiveOverlayPane.getHeight() > 0 ? interactiveOverlayPane.getHeight() : RegionConstant.PREVIEW_HEIGHT;
+
+        double sealW = RegionConstant.SEAL_WIDTH;
+        double sealH = RegionConstant.SEAL_HEIGHT;
+
+        // Centraliza o selo na ponta do cursor, sem deixar transbordar da folha
+        double clampedX = Math.max(0, Math.min(viewX - sealW / 2.0, sheetW - sealW));
+        double clampedY = Math.max(0, Math.min(viewY - sealH / 2.0, sheetH - sealH));
+
+        sealStampOverlayView.setLayoutX(clampedX);
+        sealStampOverlayView.setLayoutY(clampedY);
+        sealStampOverlayView.setVisible(true);
+
+        // Conversão matemática precisa para coordenadas do sistema PDF (origem inferior-esquerda em pontos)
+        double pctX = clampedX / sheetW;
+        double pctY = clampedY / sheetH;
+
+        float pdfW = RegionConstant.PDF_DEFAULT_PAGE_WIDTH;
+        float pdfH = RegionConstant.PDF_DEFAULT_PAGE_HEIGHT;
+        float sealPdfW = RegionConstant.PDF_SEAL_WIDTH;
+        float sealPdfH = RegionConstant.PDF_SEAL_HEIGHT;
+
+        float calculatedPdfX = (float) (pctX * pdfW);
+        float calculatedPdfY = (float) (pdfH - (pctY * pdfH) - sealPdfH);
+
+        this.customPdfX = Math.max(0, Math.min(calculatedPdfX, pdfW - sealPdfW));
+        this.customPdfY = Math.max(0, Math.min(calculatedPdfY, pdfH - sealPdfH));
+        this.customPageNumber = currentPageIndex + 1;
+        this.isCustomPositionActive = true;
+
+        // Seleciona a opção CUSTOM no combo
+        if (positionCombo.getValue() != PositionOption.CUSTOM) {
+            positionCombo.setValue(PositionOption.CUSTOM);
+        }
+
+        updateFeedbackLabel();
+    }
+
+    private void resetSealToCornerPosition(PositionOption option) {
+        if (option == PositionOption.CUSTOM) {
+            return;
+        }
+
+        isCustomPositionActive = false;
+        double sheetW = interactiveOverlayPane.getWidth() > 0 ? interactiveOverlayPane.getWidth() : RegionConstant.PREVIEW_WIDTH;
+        double sheetH = interactiveOverlayPane.getHeight() > 0 ? interactiveOverlayPane.getHeight() : RegionConstant.PREVIEW_HEIGHT;
+
+        double sealW = RegionConstant.SEAL_WIDTH;
+        double sealH = RegionConstant.SEAL_HEIGHT;
+        double margin = 16.0;
+
+        double targetX;
+        double targetY;
+
+        switch (option) {
+            case BOTTOM_LEFT -> {
+                targetX = margin;
+                targetY = sheetH - sealH - margin;
+            }
+            case TOP_RIGHT -> {
+                targetX = sheetW - sealW - margin;
+                targetY = margin;
+            }
+            case TOP_LEFT -> {
+                targetX = margin;
+                targetY = margin;
+            }
+            default -> { // BOTTOM_RIGHT
+                targetX = sheetW - sealW - margin;
+                targetY = sheetH - sealH - margin;
+            }
+        }
+
+        sealStampOverlayView.setLayoutX(targetX);
+        sealStampOverlayView.setLayoutY(targetY);
+        sealStampOverlayView.setVisible(true);
+
+        lblPositionFeedback.setText("Posição fixa: " + option.label);
+    }
+
+    private void handlePositionComboSelection() {
+        PositionOption sel = positionCombo.getValue();
+        if (sel != null && sel != PositionOption.CUSTOM) {
+            resetSealToCornerPosition(sel);
+        }
+    }
+
+    private void updateFeedbackLabel() {
+        if (isCustomPositionActive && customPageNumber != null && customPdfX != null && customPdfY != null) {
+            lblPositionFeedback.setText(String.format("📍 Selo na Pág. %d [X: %.0f pt, Y: %.0f pt]",
+                    customPageNumber, customPdfX, customPdfY));
+        }
+    }
+
+    private void toggleVisibleSeal(boolean active) {
+        themeCombo.setDisable(!active);
+        positionCombo.setDisable(!active);
+        pageCombo.setDisable(!active);
+        txtReason.setDisable(!active);
+        txtLocation.setDisable(!active);
+        if (txtCustomInfo != null) {
+            txtCustomInfo.setDisable(!active);
+        }
+        sealPreviewImageView.setOpacity(active ? 1.0 : 0.3);
+        sealStampOverlayView.setVisible(active && selectedPdfBytes != null);
+    }
+
+    private void populateCertificates() {
+        try {
+            List<ManagedCertificate> certs = certManager.getAvailableCertificates();
+            certCombo.setItems(FXCollections.observableArrayList(certs));
+            if (!certs.isEmpty()) {
+                certCombo.setValue(certs.get(0));
+            }
+        } catch (Exception e) {
+            logger.error("Erro ao listar certificados para assinatura de PDF", e);
+        }
+    }
+
+    private void updatePinFieldVisibility() {
+        ManagedCertificate cert = certCombo.getValue();
+        if (cert == null) {
+            pinField.setDisable(true);
+            lblPinNotice.setText("");
+            return;
+        }
+
+        boolean isA3 = cert.type() == CertificateType.A3;
+        boolean hasPinInSession = isA3 && PinSessionManager.getInstance().hasPin(cert.id());
+
+        if (hasPinInSession) {
+            pinField.setDisable(true);
+            pinField.clear();
+            lblPinNotice.setText("✓ PIN memorizado");
+            lblPinNotice.setStyle("-fx-text-fill: #10b981; -fx-font-weight: bold;");
+        } else if (isA3 && "provider-win-store".equalsIgnoreCase(cert.providerId())) {
+            pinField.setDisable(true);
+            pinField.clear();
+            lblPinNotice.setText("Driver nativo");
+            lblPinNotice.setStyle("-fx-text-fill: -fx-accent;");
+        } else {
+            pinField.setDisable(false);
+            lblPinNotice.setText(isA3 ? "Requer PIN" : "Requer senha");
+            lblPinNotice.setStyle("-fx-text-fill: -fx-text-secondary;");
+        }
+    }
+
+    private void updateSealPreview() {
+        try {
+            PdfSealTheme theme = themeCombo.getValue();
+            if (theme == null) {
+                theme = PdfSealThemeRegistry.getDefaultTheme();
+            }
+
+            ManagedCertificate cert = certCombo.getValue();
+            String name = (cert != null && cert.commonName() != null) ? cert.commonName() : "NOME DO TITULAR ICP-BRASIL";
+            String doc = (cert != null && cert.cpf() != null) ? cert.cpf() : (cert != null && cert.cnpj() != null ? cert.cnpj() : "000.000.000-00");
+            String issuer = (cert != null && cert.issuerDn() != null) ? cert.issuerDn() : "AC ICP-Brasil Multipla v5";
+            String reason = (txtReason != null && !txtReason.getText().isBlank()) ? txtReason.getText() : "Assinatura Digital ICP-Brasil";
+            String location = (txtLocation != null && !txtLocation.getText().isBlank()) ? txtLocation.getText() : "Brasil";
+
+            CpfDisplayMode cpfMode = (cpfModeCombo != null && cpfModeCombo.getValue() != null)
+                    ? cpfModeCombo.getValue()
+                    : CpfDisplayMode.FULL;
+            boolean includeDt = (chkDateTime != null) ? chkDateTime.isSelected() : true;
+            String customInfo = (txtCustomInfo != null && !txtCustomInfo.getText().isBlank())
+                    ? txtCustomInfo.getText().trim()
+                    : null;
+
+            PdfSealData data = new PdfSealData(
+                    name,
+                    doc,
+                    null,
+                    issuer,
+                    "7A3F9C01B4E8D2E5...",
+                    reason,
+                    location,
+                    cpfMode,
+                    includeDt,
+                    customInfo
+            );
+
+            byte[] pngBytes = PdfSealRenderer.renderToPngBytes(theme, data);
+            Image image = new Image(new ByteArrayInputStream(pngBytes));
+            sealPreviewImageView.setImage(image);
+
+            // Atualiza também a estampa que fica sobreposta na folha do PDF
+            sealStampOverlayView.setImage(image);
+        } catch (Exception e) {
+            logger.warn("Falha ao atualizar pré-visualização do selo: {}", e.getMessage());
+        }
+    }
+
+    private void executePdfSignature() {
+        if (selectedSourceFile == null || !selectedSourceFile.exists()) {
+            showAlert(Alert.AlertType.WARNING, "Documento Não Selecionado", "Por favor, selecione um arquivo PDF válido para assinar.");
+            return;
+        }
+
+        ManagedCertificate cert = certCombo.getValue();
+        if (cert == null) {
+            showAlert(Alert.AlertType.WARNING, "Certificado Não Selecionado", "Por favor, selecione um certificado digital.");
+            return;
+        }
+
+        FileChooser chooser = new FileChooser();
+        chooser.setTitle("Salvar PDF Assinado Como...");
+        chooser.getExtensionFilters().add(new FileChooser.ExtensionFilter("Documentos PDF (*.pdf)", "*.pdf"));
+
+        String originalName = selectedSourceFile.getName();
+        String baseName = originalName.toLowerCase().endsWith(".pdf")
+                ? originalName.substring(0, originalName.length() - 4)
+                : originalName;
+        chooser.setInitialFileName(baseName + "_assinado.pdf");
+        if (selectedSourceFile.getParentFile() != null && selectedSourceFile.getParentFile().exists()) {
+            chooser.setInitialDirectory(selectedSourceFile.getParentFile());
+        }
+
+        File targetFile = chooser.showSaveDialog(stage);
+        if (targetFile == null) {
+            return;
+        }
+
+        char[] pin = null;
+        if (!pinField.isDisable() && !pinField.getText().isEmpty()) {
+            pin = pinField.getText().toCharArray();
+        }
+
+        CpfDisplayMode selectedCpfMode = (cpfModeCombo != null && cpfModeCombo.getValue() != null)
+                ? cpfModeCombo.getValue()
+                : CpfDisplayMode.FULL;
+        boolean selectedIncludeDt = (chkDateTime != null) ? chkDateTime.isSelected() : true;
+        String customInfo = (txtCustomInfo != null && !txtCustomInfo.getText().isBlank())
+                ? txtCustomInfo.getText().trim()
+                : null;
+
+        PdfSignatureOptions options;
+        if (isCustomPositionActive && customPdfX != null && customPdfY != null) {
+            options = PdfSignatureOptions.builder(cert.id())
+                    .pinOrPassword(pin)
+                    .visibleSeal(chkVisibleSeal.isSelected())
+                    .sealTheme(themeCombo.getValue())
+                    .cpfDisplayMode(selectedCpfMode)
+                    .includeDateTime(selectedIncludeDt)
+                    .customExtraInfo(customInfo)
+                    .customPosition(customPdfX, customPdfY, customPageNumber)
+                    .reason(txtReason.getText())
+                    .location(txtLocation.getText())
+                    .build();
+        } else {
+            options = PdfSignatureOptions.builder(cert.id())
+                    .pinOrPassword(pin)
+                    .visibleSeal(chkVisibleSeal.isSelected())
+                    .sealTheme(themeCombo.getValue())
+                    .cpfDisplayMode(selectedCpfMode)
+                    .includeDateTime(selectedIncludeDt)
+                    .customExtraInfo(customInfo)
+                    .position(positionCombo.getValue().toPosition())
+                    .pageChoice(pageCombo.getValue().toPageChoice())
+                    .reason(txtReason.getText())
+                    .location(txtLocation.getText())
+                    .build();
+        }
+
+        setFormDisabled(true);
+        progressIndicator.setVisible(true);
+        lblStatus.setText("Assinando documento PDF com envelope PAdES...");
+        lblStatus.setStyle("-fx-text-fill: -fx-accent;");
+
+        Task<File> signTask = new Task<>() {
+            @Override
+            protected File call() throws Exception {
+                pdfSigningService.signPdfFile(selectedSourceFile, targetFile, options);
+                return targetFile;
+            }
+        };
+
+        signTask.setOnSucceeded(e -> {
+            setFormDisabled(false);
+            progressIndicator.setVisible(false);
+            lblStatus.setText("✓ Documento assinado com sucesso!");
+            lblStatus.setStyle("-fx-text-fill: #10b981; -fx-font-weight: bold;");
+
+            showSuccessDialog(targetFile);
+        });
+
+        signTask.setOnFailed(e -> {
+            setFormDisabled(false);
+            progressIndicator.setVisible(false);
+            Throwable ex = signTask.getException();
+            logger.error("Falha ao assinar PDF", ex);
+            lblStatus.setText("✕ Falha na assinatura");
+            lblStatus.setStyle("-fx-text-fill: #ef4444; -fx-font-weight: bold;");
+
+            showAlert(Alert.AlertType.ERROR, "Erro na Assinatura do PDF",
+                    "Não foi possível concluir a assinatura digital:\n" + (ex != null ? ex.getMessage() : "Erro desconhecido"));
+        });
+
+        Thread signThread = new Thread(signTask, "cybercore-pdf-signer");
+        signThread.setDaemon(true);
+        signThread.start();
+    }
+
+    private void showSuccessDialog(File targetFile) {
+        Alert alert = new Alert(Alert.AlertType.INFORMATION);
+        alert.setTitle("Assinatura Concluída");
+        alert.setHeaderText("PDF Assinado com Sucesso!");
+        alert.setContentText("O documento foi digitalmente assinado no padrão PAdES e o selo visual foi aplicado na posição exata solicitada.\n\n"
+                + "Arquivo gerado:\n" + targetFile.getAbsolutePath());
+
+        ButtonType btnOpen = new ButtonType("Abrir PDF");
+        ButtonType btnFolder = new ButtonType("Abrir Pasta");
+        ButtonType btnClose = new ButtonType("Fechar", ButtonBar.ButtonData.CANCEL_CLOSE);
+
+        alert.getButtonTypes().setAll(btnOpen, btnFolder, btnClose);
+        ThemeManager.applyTheme(alert.getDialogPane().getScene());
+
+        Optional<ButtonType> result = alert.showAndWait();
+        if (result.isPresent()) {
+            if (result.get() == btnOpen) {
+                openFile(targetFile);
+            } else if (result.get() == btnFolder) {
+                openFolder(targetFile);
+            }
+        }
+    }
+
+    private void openFile(File file) {
+        try {
+            if (Desktop.isDesktopSupported() && Desktop.getDesktop().isSupported(Desktop.Action.OPEN)) {
+                Desktop.getDesktop().open(file);
+            }
+        } catch (Exception ex) {
+            logger.warn("Não foi possível abrir o arquivo automaticamente: {}", ex.getMessage());
+        }
+    }
+
+    private void openFolder(File file) {
+        try {
+            if (Desktop.isDesktopSupported() && Desktop.getDesktop().isSupported(Desktop.Action.OPEN)) {
+                File parent = file.getParentFile();
+                if (parent != null) {
+                    Desktop.getDesktop().open(parent);
+                }
+            }
+        } catch (Exception ex) {
+            logger.warn("Não foi possível abrir a pasta do arquivo: {}", ex.getMessage());
+        }
+    }
+
+    private void setFormDisabled(boolean disabled) {
+        btnSign.setDisable(disabled);
+        btnCancel.setDisable(disabled);
+        certCombo.setDisable(disabled);
+        pinField.setDisable(disabled);
+        chkVisibleSeal.setDisable(disabled);
+        themeCombo.setDisable(disabled);
+        positionCombo.setDisable(disabled);
+        pageCombo.setDisable(disabled);
+        txtReason.setDisable(disabled);
+        txtLocation.setDisable(disabled);
+        interactiveOverlayPane.setDisable(disabled);
+        btnPrevPage.setDisable(disabled || currentPageIndex == 0);
+        btnNextPage.setDisable(disabled || currentPageIndex >= totalPages - 1);
+    }
+
+    private void showAlert(Alert.AlertType type, String title, String message) {
+        Alert alert = new Alert(type);
+        alert.setTitle(title);
+        alert.setHeaderText(null);
+        alert.setContentText(message);
+        ThemeManager.applyTheme(alert.getDialogPane().getScene());
+        alert.showAndWait();
+    }
+
+    public void show() {
+        stage.centerOnScreen();
+        stage.show();
+        stage.toFront();
+    }
+
+    public enum PositionOption {
+        BOTTOM_RIGHT("Canto Inferior Direito", PdfSealPosition.BOTTOM_RIGHT),
+        BOTTOM_LEFT("Canto Inferior Esquerdo", PdfSealPosition.BOTTOM_LEFT),
+        TOP_RIGHT("Canto Superior Direito", PdfSealPosition.TOP_RIGHT),
+        TOP_LEFT("Canto Superior Esquerdo", PdfSealPosition.TOP_LEFT),
+        CUSTOM("Personalizado (Clique na Folha)", PdfSealPosition.CUSTOM);
+
+        final String label;
+        final PdfSealPosition position;
+
+        PositionOption(String label, PdfSealPosition position) {
+            this.label = label;
+            this.position = position;
+        }
+
+        public PdfSealPosition toPosition() {
+            return position;
+        }
+
+        @Override
+        public String toString() {
+            return label;
+        }
+    }
+
+    public enum PageOption {
+        LAST_PAGE("Última Página", PdfSealPageChoice.LAST_PAGE),
+        FIRST_PAGE("Primeira Página", PdfSealPageChoice.FIRST_PAGE),
+        ALL_PAGES("Todas as Páginas", PdfSealPageChoice.ALL_PAGES);
+
+        private final String label;
+        private final PdfSealPageChoice pageChoice;
+
+        PageOption(String label, PdfSealPageChoice pageChoice) {
+            this.label = label;
+            this.pageChoice = pageChoice;
+        }
+
+        public PdfSealPageChoice toPageChoice() {
+            return pageChoice;
+        }
+
+        @Override
+        public String toString() {
+            return label;
+        }
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/SealDesignerDialog.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/SealDesignerDialog.java
new file mode 100644
index 0000000..ea6a2c1
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/SealDesignerDialog.java
@@ -0,0 +1,643 @@
+package br.com.cybercore.signer.ui.view;
+
+import br.com.cybercore.signer.core.pdf.seal.CpfDisplayMode;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealData;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealRenderer;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealTheme;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealThemeRegistry;
+import br.com.cybercore.signer.ui.components.SvgIcons;
+import br.com.cybercore.signer.ui.theme.ThemeManager;
+import javafx.application.Platform;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.Alert;
+import javafx.scene.control.Button;
+import javafx.scene.control.CheckBox;
+import javafx.scene.control.ColorPicker;
+import javafx.scene.control.ComboBox;
+import javafx.scene.control.Label;
+import javafx.scene.control.RadioButton;
+import javafx.scene.control.ScrollPane;
+import javafx.scene.control.TextField;
+import javafx.scene.control.ToggleGroup;
+import javafx.scene.image.Image;
+import javafx.scene.image.ImageView;
+import java.io.ByteArrayInputStream;
+import javafx.scene.layout.ColumnConstraints;
+import javafx.scene.layout.GridPane;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.Region;
+import javafx.scene.layout.VBox;
+import javafx.scene.paint.Color;
+import javafx.stage.FileChooser;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.util.Base64;
+import java.util.UUID;
+import java.util.function.Consumer;
+
+/**
+ * Diálogo Interativo para Criação, Customização, Importação e Instalação de Selos Digitais.
+ * Permite ao usuário definir cores, textos, dimensões, opções de CPF (completo, mascarado, oculto),
+ * data/hora da assinatura e upload de logotipo personalizado, visualizando em tempo real antes de instalar.
+ */
+@SuppressWarnings("this-escape")
+public final class SealDesignerDialog {
+
+    private static final Logger logger = LoggerFactory.getLogger(SealDesignerDialog.class);
+
+    private final Stage stage;
+    private final Consumer<PdfSealTheme> onSealInstalled;
+
+    private TextField txtName;
+    private TextField txtCustomHeader;
+    private TextField txtCustomFooter;
+
+    private ColorPicker cpPrimary;
+    private ColorPicker cpSecondary;
+    private ColorPicker cpBackground;
+    private ColorPicker cpBorder;
+    private ColorPicker cpText;
+
+    private ComboBox<String> cbIconStyle;
+    private String customLogoBase64;
+    private Label lblLogoStatus;
+    private Button btnClearLogo;
+
+    private TextField txtCustomFieldLabel;
+    private TextField txtCustomFieldValue;
+
+    private CheckBox chkIncludeCpf;
+    private RadioButton rbCpfMasked;
+    private RadioButton rbCpfFull;
+    private CheckBox chkIncludeDateTime;
+
+    private ImageView previewImageView;
+
+    public SealDesignerDialog(Stage owner, Consumer<PdfSealTheme> onSealInstalled) {
+        this(owner, null, onSealInstalled);
+    }
+
+    public SealDesignerDialog(Stage owner, PdfSealTheme initialTheme, Consumer<PdfSealTheme> onSealInstalled) {
+        this.onSealInstalled = onSealInstalled;
+
+        this.stage = new Stage();
+        this.stage.initModality(Modality.APPLICATION_MODAL);
+        if (owner != null) {
+            this.stage.initOwner(owner);
+        }
+        this.stage.setTitle("CyberCore Signer — Criador e Instalador de Selos Digitais");
+        this.stage.setResizable(true);
+        this.stage.setMinWidth(860);
+        this.stage.setMinHeight(560);
+
+        initLayout();
+        if (initialTheme != null) {
+            loadThemeIntoForm(initialTheme);
+        }
+        updatePreview();
+    }
+
+    private void initLayout() {
+        VBox root = new VBox(14);
+        root.setPadding(new Insets(16));
+        root.getStyleClass().add("dialog-container");
+
+        // Topo / Cabeçalho
+        HBox header = new HBox(12);
+        header.setAlignment(Pos.CENTER_LEFT);
+        VBox titleBox = new VBox(3);
+        Label lblTitle = new Label("CRIADOR E INSTALADOR DE SELOS VISUAIS");
+        lblTitle.getStyleClass().add("dialog-header");
+        Label lblSub = new Label("Crie sua identidade visual personalizada para assinaturas em PDF e instale no sistema.");
+        lblSub.getStyleClass().add("dialog-subtitle");
+        titleBox.getChildren().addAll(lblTitle, lblSub);
+        header.getChildren().addAll(SvgIcons.sealIcon(), titleBox);
+
+        // Painel Principal: Formulário à esquerda, Preview ao vivo à direita
+        HBox mainSplit = new HBox(16);
+        VBox.setVgrow(mainSplit, Priority.ALWAYS);
+
+        // --- Coluna Esquerda: Controles (Formulário) ---
+        VBox formPane = new VBox(12);
+        formPane.setPrefWidth(430);
+        formPane.setMinWidth(400);
+
+        ScrollPane scrollForm = new ScrollPane(formPane);
+        scrollForm.setFitToWidth(true);
+        VBox.setVgrow(scrollForm, Priority.ALWAYS);
+        scrollForm.setStyle("-fx-background: transparent; -fx-background-color: transparent;");
+        HBox.setHgrow(scrollForm, Priority.ALWAYS);
+
+        // 1. Identificação do Selo e Campos Adicionais
+        VBox idBox = new VBox(8);
+        idBox.getStyleClass().add("dialog-box");
+        Label lblIdSection = new Label("IDENTIFICAÇÃO DO SELO E TITULAR");
+        lblIdSection.getStyleClass().add("dialog-field-title");
+
+        Label lblName = new Label("Nome do Selo:");
+        lblName.getStyleClass().add("form-label");
+        txtName = new TextField("Meu Selo Personalizado");
+        txtName.setPromptText("Nome do selo (ex: Escritório Silva)");
+        txtName.textProperty().addListener((obs, oldV, newV) -> updatePreview());
+
+        Label lblCustomHeaderTitle = new Label("Texto de Cabeçalho:");
+        lblCustomHeaderTitle.getStyleClass().add("form-label");
+        txtCustomHeader = new TextField("MEU ESCRITÓRIO • ASSINADO DIGITALMENTE");
+        txtCustomHeader.setPromptText("Cabeçalho (ex: MINHA EMPRESA)");
+        txtCustomHeader.textProperty().addListener((obs, oldV, newV) -> updatePreview());
+
+        Label lblCustomFooterTitle = new Label("Texto de Rodapé:");
+        lblCustomFooterTitle.getStyleClass().add("form-label");
+        txtCustomFooter = new TextField("Validade jurídica plena conforme MP nº 2.200-2/2001");
+        txtCustomFooter.setPromptText("Rodapé institucional");
+        txtCustomFooter.textProperty().addListener((obs, oldV, newV) -> updatePreview());
+
+        // Campos Adicionais Customizáveis (Matrícula, Cargo, OAB, etc.)
+        Label lblCustomFieldSection = new Label("Campo Personalizado Adicional (Opcional - Matrícula, Cargo, OAB):");
+        lblCustomFieldSection.getStyleClass().add("form-label");
+
+        GridPane customFieldGrid = new GridPane();
+        customFieldGrid.setHgap(10);
+        customFieldGrid.setVgap(6);
+
+        txtCustomFieldLabel = new TextField("Matrícula");
+        txtCustomFieldLabel.setPromptText("Rótulo (ex: Matrícula, Cargo, OAB)");
+        txtCustomFieldLabel.setPrefWidth(150);
+        txtCustomFieldLabel.textProperty().addListener((obs, oldV, newV) -> updatePreview());
+
+        txtCustomFieldValue = new TextField("104829");
+        txtCustomFieldValue.setPromptText("Valor (ex: 104829, Auditor Fiscal)");
+        GridPane.setHgrow(txtCustomFieldValue, Priority.ALWAYS);
+        txtCustomFieldValue.textProperty().addListener((obs, oldV, newV) -> updatePreview());
+
+        Label lblCustomFieldLabelText = new Label("Rótulo do Campo:");
+        lblCustomFieldLabelText.getStyleClass().add("form-label");
+        Label lblCustomFieldValueText = new Label("Valor do Campo:");
+        lblCustomFieldValueText.getStyleClass().add("form-label");
+
+        customFieldGrid.add(lblCustomFieldLabelText, 0, 0);
+        customFieldGrid.add(txtCustomFieldLabel, 0, 1);
+        customFieldGrid.add(lblCustomFieldValueText, 1, 0);
+        customFieldGrid.add(txtCustomFieldValue, 1, 1);
+
+        idBox.getChildren().addAll(lblIdSection,
+                lblName, txtName,
+                lblCustomHeaderTitle, txtCustomHeader,
+                lblCustomFooterTitle, txtCustomFooter,
+                lblCustomFieldSection, customFieldGrid);
+
+        // 2. Cores e Emblema / Logotipo Personalizado
+        VBox styleBox = new VBox(12);
+        styleBox.getStyleClass().add("dialog-box");
+        Label lblStyleSection = new Label("CORES E EMBLEMA / LOGOTIPO");
+        lblStyleSection.getStyleClass().add("dialog-field-title");
+
+        GridPane colorGrid = new GridPane();
+        colorGrid.setHgap(12);
+        colorGrid.setVgap(10);
+
+        ColumnConstraints colLabels = new ColumnConstraints();
+        colLabels.setMinWidth(130);
+        colLabels.setPrefWidth(140);
+
+        ColumnConstraints colPickers = new ColumnConstraints();
+        colPickers.setHgrow(Priority.ALWAYS);
+        colorGrid.getColumnConstraints().addAll(colLabels, colPickers);
+
+        cpPrimary = new ColorPicker(Color.web("#0d47a1"));
+        cpPrimary.setMaxWidth(Double.MAX_VALUE);
+        cpPrimary.setOnAction(e -> updatePreview());
+
+        cpSecondary = new ColorPicker(Color.web("#0284c7"));
+        cpSecondary.setMaxWidth(Double.MAX_VALUE);
+        cpSecondary.setOnAction(e -> updatePreview());
+
+        cpBackground = new ColorPicker(Color.web("#ffffff"));
+        cpBackground.setMaxWidth(Double.MAX_VALUE);
+        cpBackground.setOnAction(e -> updatePreview());
+
+        cpBorder = new ColorPicker(Color.web("#cbd5e1"));
+        cpBorder.setMaxWidth(Double.MAX_VALUE);
+        cpBorder.setOnAction(e -> updatePreview());
+
+        cpText = new ColorPicker(Color.web("#0f172a"));
+        cpText.setMaxWidth(Double.MAX_VALUE);
+        cpText.setOnAction(e -> updatePreview());
+
+        Label lblCpPrimary = new Label("Cor Primária:");
+        lblCpPrimary.getStyleClass().add("form-label");
+        Label lblCpSecondary = new Label("Cor Secundária:");
+        lblCpSecondary.getStyleClass().add("form-label");
+        Label lblCpBackground = new Label("Cor de Fundo:");
+        lblCpBackground.getStyleClass().add("form-label");
+        Label lblCpBorder = new Label("Cor da Borda:");
+        lblCpBorder.getStyleClass().add("form-label");
+        Label lblCpText = new Label("Cor do Texto:");
+        lblCpText.getStyleClass().add("form-label");
+
+        colorGrid.add(lblCpPrimary, 0, 0);
+        colorGrid.add(cpPrimary, 1, 0);
+        colorGrid.add(lblCpSecondary, 0, 1);
+        colorGrid.add(cpSecondary, 1, 1);
+        colorGrid.add(lblCpBackground, 0, 2);
+        colorGrid.add(cpBackground, 1, 2);
+        colorGrid.add(lblCpBorder, 0, 3);
+        colorGrid.add(cpBorder, 1, 3);
+        colorGrid.add(lblCpText, 0, 4);
+        colorGrid.add(cpText, 1, 4);
+
+        // Upload de Logotipo ou Emblema Próprio
+        Label lblLogoHeader = new Label("Upload de Emblema / Logotipo Próprio:");
+        lblLogoHeader.getStyleClass().add("form-label");
+
+        Button btnUploadLogo = new Button("📁 Escolher Imagem (PNG, JPG)...");
+        btnUploadLogo.getStyleClass().add("btn-secondary");
+        btnUploadLogo.setMaxWidth(Double.MAX_VALUE);
+        HBox.setHgrow(btnUploadLogo, Priority.ALWAYS);
+        btnUploadLogo.setOnAction(e -> handleUploadLogo());
+
+        btnClearLogo = new Button("✖ Remover");
+        btnClearLogo.getStyleClass().setAll("btn-danger");
+        btnClearLogo.setMinWidth(Region.USE_PREF_SIZE);
+        btnClearLogo.setDisable(true);
+        btnClearLogo.setOnAction(e -> handleClearLogo());
+
+        HBox logoBtnRow = new HBox(8, btnUploadLogo, btnClearLogo);
+        logoBtnRow.setAlignment(Pos.CENTER_LEFT);
+
+        lblLogoStatus = new Label("Nenhum logotipo carregado (usando emblema vetorial)");
+        lblLogoStatus.setStyle("-fx-font-size: 11px; -fx-text-fill: #64748b;");
+
+        Label lblFallbackIcon = new Label("Emblema Vetorial Alternativo (caso sem logo própria):");
+        lblFallbackIcon.getStyleClass().add("form-label");
+
+        cbIconStyle = new ComboBox<>();
+        cbIconStyle.getItems().addAll("Escudo de Segurança (ICP-Brasil)", "Cristal Tecnológico (CyberCore)", "Carimbo Notarial (Cartório)", "Brasão Estelar (Governamental)");
+        cbIconStyle.setValue("Escudo de Segurança (ICP-Brasil)");
+        cbIconStyle.setMaxWidth(Double.MAX_VALUE);
+        cbIconStyle.setOnAction(e -> updatePreview());
+
+        styleBox.getChildren().addAll(lblStyleSection, colorGrid, lblLogoHeader, logoBtnRow, lblLogoStatus, lblFallbackIcon, cbIconStyle);
+
+        // 3. Regras do Usuário: CPF e Data/Hora
+        VBox rulesBox = new VBox(10);
+        rulesBox.getStyleClass().add("dialog-box");
+        Label lblRulesSection = new Label("PRIVACIDADE DO CPF E DATA/HORA");
+        lblRulesSection.getStyleClass().add("dialog-field-title");
+
+        chkIncludeCpf = new CheckBox("Incluir CPF no Selo");
+        chkIncludeCpf.getStyleClass().add("form-label");
+        chkIncludeCpf.setSelected(true);
+        chkIncludeCpf.setOnAction(e -> {
+            boolean sel = chkIncludeCpf.isSelected();
+            rbCpfMasked.setDisable(!sel);
+            rbCpfFull.setDisable(!sel);
+            updatePreview();
+        });
+
+        ToggleGroup cpfGroup = new ToggleGroup();
+        rbCpfMasked = new RadioButton("CPF Mascarado (***.456.789-**)");
+        rbCpfMasked.getStyleClass().add("form-label");
+        rbCpfMasked.setToggleGroup(cpfGroup);
+        rbCpfMasked.setSelected(true);
+        rbCpfMasked.setOnAction(e -> updatePreview());
+
+        rbCpfFull = new RadioButton("CPF Completo (123.456.789-00)");
+        rbCpfFull.getStyleClass().add("form-label");
+        rbCpfFull.setToggleGroup(cpfGroup);
+        rbCpfFull.setOnAction(e -> updatePreview());
+
+        VBox cpfSubOptions = new VBox(6);
+        cpfSubOptions.setPadding(new Insets(2, 0, 4, 18));
+        cpfSubOptions.getChildren().addAll(rbCpfMasked, rbCpfFull);
+
+        chkIncludeDateTime = new CheckBox("Incluir Data e Hora da Assinatura");
+        chkIncludeDateTime.getStyleClass().add("form-label");
+        chkIncludeDateTime.setSelected(true);
+        chkIncludeDateTime.setOnAction(e -> updatePreview());
+
+        rulesBox.getChildren().addAll(lblRulesSection, chkIncludeCpf, cpfSubOptions, chkIncludeDateTime);
+
+        formPane.getChildren().addAll(idBox, styleBox, rulesBox);
+
+        // --- Coluna Direita: Live Preview e Ações ---
+        VBox previewPane = new VBox(12);
+        previewPane.setAlignment(Pos.TOP_CENTER);
+        previewPane.setPrefWidth(380);
+        previewPane.setMinWidth(360);
+        previewPane.getStyleClass().add("dialog-box");
+
+        Label lblPreviewTitle = new Label("PRÉ-VISUALIZAÇÃO EM TEMPO REAL");
+        lblPreviewTitle.getStyleClass().add("dialog-field-title");
+
+        Label lblPreviewNotice = new Label("O selo sempre exibe o nome completo do signatário com destaque e máxima legibilidade.");
+        lblPreviewNotice.setStyle("-fx-font-size: 11px; -fx-text-fill: #94a3b8;");
+        lblPreviewNotice.setWrapText(true);
+
+        previewImageView = new ImageView();
+        previewImageView.setPreserveRatio(true);
+        previewImageView.setFitWidth(360);
+
+        HBox previewContainer = new HBox(previewImageView);
+        previewContainer.setAlignment(Pos.CENTER);
+        previewContainer.setPadding(new Insets(16, 8, 16, 8));
+        previewContainer.setStyle("-fx-background-color: #090d16; -fx-background-radius: 8px; -fx-border-color: #334155; -fx-border-radius: 8px;");
+
+        VBox previewContentBox = new VBox(10);
+        previewContentBox.setAlignment(Pos.CENTER);
+        previewContentBox.getChildren().addAll(lblPreviewTitle, lblPreviewNotice, previewContainer);
+        VBox.setVgrow(previewContentBox, Priority.ALWAYS);
+
+        // Botões de Importar / Exportar
+        HBox importExportRow = new HBox(10);
+        importExportRow.setAlignment(Pos.CENTER);
+
+        Button btnImport = new Button("📥 Importar Selo...");
+        btnImport.getStyleClass().add("btn-secondary");
+        btnImport.setPrefHeight(32);
+        btnImport.setOnAction(e -> handleImportSeal());
+
+        Button btnExport = new Button("📤 Exportar Selo...");
+        btnExport.getStyleClass().add("btn-secondary");
+        btnExport.setPrefHeight(32);
+        btnExport.setOnAction(e -> handleExportSeal());
+
+        importExportRow.getChildren().addAll(btnImport, btnExport);
+
+        previewPane.getChildren().addAll(previewContentBox, importExportRow);
+
+        mainSplit.getChildren().addAll(scrollForm, previewPane);
+
+        // Rodapé de Ações Finais (Fixado na base da janela, sempre visível e destacado)
+        HBox footer = new HBox(12);
+        footer.setAlignment(Pos.CENTER_RIGHT);
+        footer.setPadding(new Insets(6, 0, 0, 0));
+
+        Button btnCancel = new Button("Cancelar");
+        btnCancel.getStyleClass().add("btn-secondary");
+        btnCancel.setPrefHeight(34);
+        btnCancel.setOnAction(e -> stage.close());
+
+        Button btnInstall = new Button("💾 Instalar Selo no Sistema");
+        btnInstall.getStyleClass().add("btn-primary");
+        btnInstall.setPrefHeight(34);
+        btnInstall.setDefaultButton(true);
+        btnInstall.setOnAction(e -> handleInstallSeal());
+
+        footer.getChildren().addAll(btnCancel, btnInstall);
+
+        root.getChildren().addAll(header, mainSplit, footer);
+
+        Scene scene = new Scene(root, 880, 580);
+        ThemeManager.applyTheme(scene);
+        stage.setScene(scene);
+    }
+
+    private void updatePreview() {
+        Platform.runLater(() -> {
+            try {
+                PdfSealTheme theme = buildThemeFromForm("preview-temp");
+                CpfDisplayMode cpfMode = resolveCpfMode();
+
+                PdfSealData sampleData = new PdfSealData(
+                        "Dr. Carlos Alberto de Oliveira Santos Júnior",
+                        "CPF: 12345678900",
+                        null,
+                        "AC CyberCore JUS v5",
+                        "8A7F4B2C91D0E3F5",
+                        "Assinatura de Documento Digital",
+                        "São Paulo, SP",
+                        cpfMode,
+                        chkIncludeDateTime.isSelected()
+                );
+
+                byte[] pngBytes = PdfSealRenderer.renderToPngBytes(theme, sampleData);
+                previewImageView.setImage(new Image(new ByteArrayInputStream(pngBytes)));
+            } catch (Exception ex) {
+                logger.warn("Erro ao gerar preview de selo: {}", ex.getMessage());
+            }
+        });
+    }
+
+    private void handleUploadLogo() {
+        FileChooser chooser = new FileChooser();
+        chooser.setTitle("Selecionar Emblema / Logotipo do Selo");
+        chooser.getExtensionFilters().addAll(
+                new FileChooser.ExtensionFilter("Imagens (*.png, *.jpg, *.jpeg, *.bmp)", "*.png", "*.jpg", "*.jpeg", "*.bmp"),
+                new FileChooser.ExtensionFilter("Todos os Arquivos", "*.*")
+        );
+        File file = chooser.showOpenDialog(stage);
+        if (file != null) {
+            try {
+                byte[] bytes = Files.readAllBytes(file.toPath());
+                customLogoBase64 = Base64.getEncoder().encodeToString(bytes);
+                lblLogoStatus.setText("✓ Imagem carregada: " + file.getName());
+                lblLogoStatus.setStyle("-fx-font-size: 11px; -fx-text-fill: #16a34a; -fx-font-weight: bold;");
+                btnClearLogo.setDisable(false);
+                updatePreview();
+            } catch (Exception ex) {
+                showAlert(Alert.AlertType.ERROR, "Erro ao Carregar Imagem", "Não foi possível carregar o arquivo de imagem: " + ex.getMessage());
+            }
+        }
+    }
+
+    private void handleClearLogo() {
+        customLogoBase64 = null;
+        lblLogoStatus.setText("Nenhum logotipo carregado (usando emblema vetorial)");
+        lblLogoStatus.setStyle("-fx-font-size: 11px; -fx-text-fill: #64748b;");
+        btnClearLogo.setDisable(true);
+        updatePreview();
+    }
+
+    private PdfSealTheme buildThemeFromForm(String themeId) {
+        String name = txtName.getText().trim();
+        if (name.isBlank()) name = "Meu Selo Personalizado";
+
+        String icon = switch (cbIconStyle.getValue()) {
+            case "Cristal Tecnológico (CyberCore)" -> "crystal";
+            case "Carimbo Notarial (Cartório)" -> "notary";
+            case "Brasão Estelar (Governamental)" -> "star";
+            default -> "shield";
+        };
+
+        return new PdfSealTheme(
+                themeId,
+                name,
+                "Selo personalizado instalado pelo usuário",
+                320,
+                82,
+                toHex(cpPrimary.getValue()),
+                toHex(cpSecondary.getValue()),
+                toHex(cpBackground.getValue()),
+                toHex(cpBorder.getValue()),
+                toHex(cpText.getValue()),
+                null,
+                txtCustomHeader.getText().trim(),
+                txtCustomFooter.getText().trim(),
+                icon,
+                resolveCpfMode(),
+                chkIncludeDateTime.isSelected(),
+                true,
+                customLogoBase64,
+                txtCustomFieldLabel.getText().trim(),
+                txtCustomFieldValue.getText().trim()
+        );
+    }
+
+    private void loadThemeIntoForm(PdfSealTheme theme) {
+        if (theme == null) return;
+        if (theme.name() != null) txtName.setText(theme.name());
+        if (theme.customHeader() != null) txtCustomHeader.setText(theme.customHeader());
+        if (theme.customFooter() != null) txtCustomFooter.setText(theme.customFooter());
+        if (theme.customFieldLabel() != null) txtCustomFieldLabel.setText(theme.customFieldLabel());
+        if (theme.customFieldValue() != null) txtCustomFieldValue.setText(theme.customFieldValue());
+
+        if (theme.primaryColor() != null) cpPrimary.setValue(Color.web(theme.primaryColor()));
+        if (theme.secondaryColor() != null) cpSecondary.setValue(Color.web(theme.secondaryColor()));
+        if (theme.backgroundColor() != null) cpBackground.setValue(Color.web(theme.backgroundColor()));
+        if (theme.borderColor() != null) cpBorder.setValue(Color.web(theme.borderColor()));
+        if (theme.textColor() != null) cpText.setValue(Color.web(theme.textColor()));
+
+        if (theme.defaultCpfMode() != null) {
+            chkIncludeCpf.setSelected(theme.defaultCpfMode() != CpfDisplayMode.NONE);
+            if (theme.defaultCpfMode() == CpfDisplayMode.MASKED) {
+                rbCpfMasked.setSelected(true);
+            } else if (theme.defaultCpfMode() == CpfDisplayMode.FULL) {
+                rbCpfFull.setSelected(true);
+            }
+            rbCpfMasked.setDisable(!chkIncludeCpf.isSelected());
+            rbCpfFull.setDisable(!chkIncludeCpf.isSelected());
+        }
+
+        chkIncludeDateTime.setSelected(theme.defaultIncludeDateTime());
+
+        if (theme.customLogoBase64() != null && !theme.customLogoBase64().isBlank()) {
+            this.customLogoBase64 = theme.customLogoBase64();
+            lblLogoStatus.setText("✓ Logotipo carregado com sucesso!");
+            lblLogoStatus.setStyle("-fx-font-size: 11px; -fx-text-fill: #16a34a; -fx-font-weight: bold;");
+            btnClearLogo.setDisable(false);
+        } else {
+            this.customLogoBase64 = null;
+            lblLogoStatus.setText("Nenhum logotipo carregado (usando emblema vetorial)");
+            lblLogoStatus.setStyle("-fx-font-size: 11px; -fx-text-fill: #64748b;");
+            btnClearLogo.setDisable(true);
+        }
+
+        if (theme.iconStyle() != null) {
+            switch (theme.iconStyle().toLowerCase()) {
+                case "crystal" -> cbIconStyle.setValue("Cristal Tecnológico (CyberCore)");
+                case "notary" -> cbIconStyle.setValue("Carimbo Notarial (Cartório)");
+                case "star" -> cbIconStyle.setValue("Brasão Estelar (Governamental)");
+                default -> cbIconStyle.setValue("Escudo de Segurança (ICP-Brasil)");
+            }
+        }
+    }
+
+    private CpfDisplayMode resolveCpfMode() {
+        if (!chkIncludeCpf.isSelected()) {
+            return CpfDisplayMode.NONE;
+        }
+        return rbCpfMasked.isSelected() ? CpfDisplayMode.MASKED : CpfDisplayMode.FULL;
+    }
+
+    private void handleInstallSeal() {
+        String name = txtName.getText().trim();
+        if (name.isBlank()) {
+            showAlert(Alert.AlertType.WARNING, "Nome Obrigatório", "Por favor, defina um nome para o seu selo.");
+            return;
+        }
+
+        String sealId = "seal-" + UUID.randomUUID().toString().substring(0, 8);
+        PdfSealTheme theme = buildThemeFromForm(sealId);
+
+        try {
+            PdfSealThemeRegistry.installCustomTheme(theme);
+            showAlert(Alert.AlertType.INFORMATION, "Selo Instalado com Sucesso!",
+                    "O selo '" + theme.name() + "' foi instalado com sucesso e já está disponível para uso imediato em todas as assinaturas.");
+
+            if (onSealInstalled != null) {
+                onSealInstalled.accept(theme);
+            }
+            stage.close();
+        } catch (IOException e) {
+            showAlert(Alert.AlertType.ERROR, "Erro ao Instalar Selo", "Falha ao gravar arquivo de selo no disco: " + e.getMessage());
+        }
+    }
+
+    private void handleExportSeal() {
+        FileChooser chooser = new FileChooser();
+        chooser.setTitle("Exportar Selo Digital (.json)");
+        chooser.setInitialFileName("meu-selo.json");
+        chooser.getExtensionFilters().add(new FileChooser.ExtensionFilter("Arquivos JSON de Selo (*.json)", "*.json"));
+
+        File file = chooser.showSaveDialog(stage);
+        if (file != null) {
+            try {
+                PdfSealTheme theme = buildThemeFromForm("exported-seal");
+                PdfSealThemeRegistry.getStorage().exportSeal(theme, file.toPath());
+                showAlert(Alert.AlertType.INFORMATION, "Selo Exportado", "O selo foi exportado com sucesso para:\n" + file.getAbsolutePath());
+            } catch (Exception ex) {
+                showAlert(Alert.AlertType.ERROR, "Erro na Exportação", "Falha ao exportar selo: " + ex.getMessage());
+            }
+        }
+    }
+
+    private void handleImportSeal() {
+        FileChooser chooser = new FileChooser();
+        chooser.setTitle("Selecionar Arquivo de Selo (.json)");
+        chooser.getExtensionFilters().add(new FileChooser.ExtensionFilter("Arquivos JSON de Selo (*.json)", "*.json"));
+
+        File file = chooser.showOpenDialog(stage);
+        if (file != null) {
+            try {
+                PdfSealTheme imported = PdfSealThemeRegistry.getStorage().importSeal(file.toPath());
+                PdfSealThemeRegistry.registerTheme(imported);
+
+                loadThemeIntoForm(imported);
+                updatePreview();
+
+                showAlert(Alert.AlertType.INFORMATION, "Selo Importado e Instalado",
+                        "O selo '" + imported.name() + "' foi importado com sucesso e está pronto para uso!");
+
+                if (onSealInstalled != null) {
+                    onSealInstalled.accept(imported);
+                }
+                stage.close();
+            } catch (Exception ex) {
+                showAlert(Alert.AlertType.ERROR, "Erro na Importação", "Falha ao importar selo do arquivo: " + ex.getMessage());
+            }
+        }
+    }
+
+    private void showAlert(Alert.AlertType type, String title, String msg) {
+        Alert a = new Alert(type);
+        a.setTitle(title);
+        a.setHeaderText(null);
+        a.setContentText(msg);
+        a.initOwner(stage);
+        ThemeManager.applyTheme(a.getDialogPane().getScene());
+        a.showAndWait();
+    }
+
+    private static String toHex(Color c) {
+        return String.format("#%02X%02X%02X",
+                (int) (c.getRed() * 255),
+                (int) (c.getGreen() * 255),
+                (int) (c.getBlue() * 255));
+    }
+
+    public void show() {
+        stage.centerOnScreen();
+        stage.show();
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/SealManagementDialog.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/SealManagementDialog.java
new file mode 100644
index 0000000..71b347b
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/SealManagementDialog.java
@@ -0,0 +1,498 @@
+package br.com.cybercore.signer.ui.view;
+
+import br.com.cybercore.signer.core.config.AgentConfiguration;
+import br.com.cybercore.signer.core.config.AgentConfigurationService;
+import br.com.cybercore.signer.core.pdf.seal.CpfDisplayMode;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealData;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealRenderer;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealTheme;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealThemeRegistry;
+import br.com.cybercore.signer.ui.components.SvgIcons;
+import br.com.cybercore.signer.ui.theme.ThemeManager;
+import javafx.application.Platform;
+import javafx.collections.FXCollections;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.Alert;
+import javafx.scene.control.Button;
+import javafx.scene.control.ButtonType;
+import javafx.scene.control.Label;
+import javafx.scene.control.ListCell;
+import javafx.scene.control.ListView;
+import javafx.scene.image.Image;
+import javafx.scene.image.ImageView;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.VBox;
+import javafx.stage.FileChooser;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.ByteArrayInputStream;
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+
+/**
+ * Diálogo Central de Gerenciamento e Seleção de Selos Digitais.
+ * Exibe a lista completa de selos disponíveis (embutidos e personalizados),
+ * permite selecionar o selo padrão ativo de assinatura, visualizar em tempo real,
+ * criar novos selos, editar/clonar, excluir, importar e exportar.
+ */
+@SuppressWarnings("this-escape")
+public final class SealManagementDialog {
+
+    private static final Logger logger = LoggerFactory.getLogger(SealManagementDialog.class);
+
+    private final Stage stage;
+    private final AgentConfigurationService configService;
+
+    private ListView<PdfSealTheme> listViewSeals;
+    private ImageView previewImageView;
+    private Label lblSelectedName;
+    private Label lblSelectedDesc;
+    private Label lblActiveBadge;
+    private Button btnSetDefault;
+    private Button btnEditClone;
+    private Button btnDelete;
+    private Button btnExport;
+    private Label lblFeedback;
+
+    private String currentDefaultThemeId;
+
+    public SealManagementDialog(Stage owner) {
+        this.configService = new AgentConfigurationService();
+        AgentConfiguration currentConfig = configService.loadConfiguration();
+        this.currentDefaultThemeId = currentConfig.defaultSealThemeId();
+
+        this.stage = new Stage();
+        this.stage.initModality(Modality.APPLICATION_MODAL);
+        if (owner != null) {
+            this.stage.initOwner(owner);
+        }
+        this.stage.setTitle("CyberCore Signer — Gerenciamento e Seleção de Selos Digitais");
+        this.stage.setResizable(true);
+        this.stage.setMinWidth(840);
+        this.stage.setMinHeight(520);
+
+        initLayout();
+        refreshSealsList();
+    }
+
+    private void initLayout() {
+        VBox root = new VBox(14);
+        root.setPadding(new Insets(18));
+        root.getStyleClass().add("dialog-container");
+
+        // Topo / Cabeçalho
+        HBox header = new HBox(12);
+        header.setAlignment(Pos.CENTER_LEFT);
+        VBox titleBox = new VBox(3);
+        Label lblTitle = new Label("GERENCIAMENTO DE SELOS DIGITAIS");
+        lblTitle.getStyleClass().add("dialog-header");
+        Label lblSub = new Label("Escolha o selo padrão ativo para assinar PDFs, crie novas identidades visuais ou personalize selos instalados.");
+        lblSub.getStyleClass().add("dialog-subtitle");
+        titleBox.getChildren().addAll(lblTitle, lblSub);
+        header.getChildren().addAll(SvgIcons.sealIcon(), titleBox);
+
+        // Painel Principal Dividido: Lista à esquerda, Detalhes e Preview à direita
+        HBox mainContent = new HBox(16);
+        VBox.setVgrow(mainContent, Priority.ALWAYS);
+
+        // --- Coluna Esquerda: Lista de Selos ---
+        VBox leftColumn = new VBox(10);
+        leftColumn.setPrefWidth(330);
+        leftColumn.setMinWidth(300);
+        leftColumn.getStyleClass().add("dialog-box");
+
+        HBox listHeader = new HBox(8);
+        listHeader.setAlignment(Pos.CENTER_LEFT);
+        Label lblListTitle = new Label("Selos Disponíveis no Sistema");
+        lblListTitle.getStyleClass().add("dialog-field-title");
+        listHeader.getChildren().add(lblListTitle);
+
+        listViewSeals = new ListView<>();
+        VBox.setVgrow(listViewSeals, Priority.ALWAYS);
+        listViewSeals.setStyle("-fx-background-color: transparent; -fx-background-radius: 6px;");
+        listViewSeals.setCellFactory(lv -> new SealListCell());
+        listViewSeals.getSelectionModel().selectedItemProperty().addListener((obs, oldV, newV) -> onThemeSelected(newV));
+
+        HBox listActionRow = new HBox(8);
+        listActionRow.setAlignment(Pos.CENTER_LEFT);
+
+        Button btnCreateNew = new Button("+ Novo Selo");
+        btnCreateNew.getStyleClass().add("btn-primary");
+        btnCreateNew.setOnAction(e -> handleCreateNewSeal());
+        HBox.setHgrow(btnCreateNew, Priority.ALWAYS);
+        btnCreateNew.setMaxWidth(Double.MAX_VALUE);
+
+        Button btnImport = new Button("📥 Importar");
+        btnImport.getStyleClass().add("btn-secondary");
+        btnImport.setOnAction(e -> handleImportSeal());
+        HBox.setHgrow(btnImport, Priority.ALWAYS);
+        btnImport.setMaxWidth(Double.MAX_VALUE);
+
+        listActionRow.getChildren().addAll(btnCreateNew, btnImport);
+
+        leftColumn.getChildren().addAll(listHeader, listViewSeals, listActionRow);
+
+        // --- Coluna Direita: Pré-Visualização e Ações do Selo Selecionado ---
+        VBox rightColumn = new VBox(10);
+        rightColumn.setPrefWidth(430);
+        rightColumn.setMinWidth(380);
+        rightColumn.getStyleClass().add("dialog-box");
+        rightColumn.setAlignment(Pos.TOP_CENTER);
+        HBox.setHgrow(rightColumn, Priority.ALWAYS);
+
+        Label lblPreviewHeader = new Label("PRÉ-VISUALIZAÇÃO EM TEMPO REAL");
+        lblPreviewHeader.getStyleClass().add("dialog-field-title");
+
+        lblSelectedName = new Label("Selecione um selo para visualizar");
+        lblSelectedName.setStyle("-fx-font-weight: bold; -fx-font-size: 14px;");
+
+        lblSelectedDesc = new Label("");
+        lblSelectedDesc.setStyle("-fx-font-size: 11.5px; -fx-text-fill: #64748b;");
+        lblSelectedDesc.setWrapText(true);
+
+        previewImageView = new ImageView();
+        previewImageView.setPreserveRatio(true);
+        previewImageView.setFitWidth(380);
+
+        HBox previewContainer = new HBox(previewImageView);
+        previewContainer.setAlignment(Pos.CENTER);
+        previewContainer.setPadding(new Insets(14, 10, 14, 10));
+        previewContainer.setStyle("-fx-background-color: #090d16; -fx-background-radius: 8px; -fx-border-color: #334155; -fx-border-radius: 8px;");
+        VBox.setVgrow(previewContainer, Priority.ALWAYS);
+
+        lblActiveBadge = new Label("");
+        lblActiveBadge.setStyle("-fx-font-weight: bold; -fx-font-size: 12px;");
+
+        lblFeedback = new Label("");
+        lblFeedback.setStyle("-fx-font-size: 12px; -fx-font-weight: bold; -fx-text-fill: #16a34a;");
+
+        // Botões de Ação do Selo Selecionado
+        VBox sealActions = new VBox(8);
+        sealActions.setAlignment(Pos.CENTER);
+
+        btnSetDefault = new Button("✔ Definir como Selo Padrão Ativo");
+        btnSetDefault.getStyleClass().add("btn-primary");
+        btnSetDefault.setMaxWidth(Double.MAX_VALUE);
+        btnSetDefault.setPrefHeight(34);
+        btnSetDefault.setOnAction(e -> handleSetDefault());
+
+        HBox secondaryActions = new HBox(8);
+        secondaryActions.setAlignment(Pos.CENTER);
+
+        btnEditClone = new Button("✏ Clonar");
+        btnEditClone.getStyleClass().add("btn-secondary");
+        btnEditClone.setPrefHeight(32);
+        HBox.setHgrow(btnEditClone, Priority.ALWAYS);
+        btnEditClone.setMaxWidth(Double.MAX_VALUE);
+        btnEditClone.setOnAction(e -> handleEditClone());
+
+        btnExport = new Button("📥 Exportar");
+        btnExport.getStyleClass().add("btn-secondary");
+        btnExport.setPrefHeight(32);
+        HBox.setHgrow(btnExport, Priority.ALWAYS);
+        btnExport.setMaxWidth(Double.MAX_VALUE);
+        btnExport.setOnAction(e -> handleExportSeal());
+
+        btnDelete = new Button("✖ Excluir");
+        btnDelete.getStyleClass().addAll("button", "btn-danger");
+        btnDelete.setAlignment(Pos.CENTER);
+        btnDelete.setPrefHeight(32);
+        HBox.setHgrow(btnDelete, Priority.ALWAYS);
+        btnDelete.setMaxWidth(Double.MAX_VALUE);
+        btnDelete.setOnAction(e -> handleDeleteCustomSeal());
+
+        secondaryActions.getChildren().addAll(btnEditClone, btnExport, btnDelete);
+        sealActions.getChildren().addAll(btnSetDefault, secondaryActions);
+
+        rightColumn.getChildren().addAll(lblPreviewHeader, lblSelectedName, lblSelectedDesc, previewContainer, lblActiveBadge, lblFeedback, sealActions);
+
+        mainContent.getChildren().addAll(leftColumn, rightColumn);
+
+        // Rodapé
+        HBox footer = new HBox(12);
+        footer.setAlignment(Pos.CENTER_RIGHT);
+
+        Button btnClose = new Button(" Fechar", SvgIcons.closeIcon(13));
+        btnClose.getStyleClass().add("btn-secondary");
+        btnClose.setPrefWidth(95);
+        btnClose.setOnAction(e -> stage.close());
+
+        footer.getChildren().add(btnClose);
+
+        root.getChildren().addAll(header, mainContent, footer);
+
+        Scene scene = new Scene(root, 880, 560);
+        ThemeManager.applyTheme(scene);
+        stage.setScene(scene);
+    }
+
+    private void refreshSealsList() {
+        List<PdfSealTheme> themes = PdfSealThemeRegistry.listThemes();
+        listViewSeals.setItems(FXCollections.observableArrayList(themes));
+
+        // Seleciona o selo padrão ativo ou o primeiro disponível
+        PdfSealTheme toSelect = themes.stream()
+                .filter(t -> t.id().equalsIgnoreCase(currentDefaultThemeId))
+                .findFirst()
+                .orElse(themes.isEmpty() ? null : themes.get(0));
+
+        if (toSelect != null) {
+            listViewSeals.getSelectionModel().select(toSelect);
+        }
+    }
+
+    private void onThemeSelected(PdfSealTheme theme) {
+        lblFeedback.setText("");
+        if (theme == null) {
+            lblSelectedName.setText("Nenhum selo selecionado");
+            lblSelectedDesc.setText("");
+            lblActiveBadge.setText("");
+            btnSetDefault.setDisable(true);
+            btnEditClone.setDisable(true);
+            btnDelete.setDisable(true);
+            btnExport.setDisable(true);
+            previewImageView.setImage(null);
+            return;
+        }
+
+        lblSelectedName.setText(theme.name() + " (" + theme.id() + ")");
+        lblSelectedDesc.setText(theme.description() != null ? theme.description() : "Selo visual para assinatura");
+
+        boolean isDefault = theme.id().equalsIgnoreCase(currentDefaultThemeId);
+        if (isDefault) {
+            lblActiveBadge.setText("★ ESTE É O SELO PADRÃO ATIVO PARA TODAS AS ASSINATURAS");
+            lblActiveBadge.setStyle("-fx-text-fill: #38bdf8; -fx-font-weight: bold; -fx-font-size: 11.5px;");
+            btnSetDefault.setText("★ Selo Padrão Ativo no Sistema");
+            btnSetDefault.setDisable(true);
+            btnSetDefault.setStyle("-fx-opacity: 0.95; -fx-background-color: #0369a1; -fx-text-fill: #ffffff; -fx-font-weight: bold;");
+        } else {
+            lblActiveBadge.setText("Selo disponível para uso.");
+            lblActiveBadge.setStyle("-fx-text-fill: #94a3b8; -fx-font-size: 11.5px;");
+            btnSetDefault.setText("✔ Definir como Selo Padrão Ativo");
+            btnSetDefault.setDisable(false);
+            btnSetDefault.setStyle("");
+        }
+
+        btnEditClone.setDisable(false);
+        btnExport.setDisable(false);
+        btnDelete.setDisable(!theme.isCustom());
+
+        renderThemePreview(theme);
+    }
+
+    private void renderThemePreview(PdfSealTheme theme) {
+        Platform.runLater(() -> {
+            try {
+                PdfSealData sampleData = new PdfSealData(
+                        "Dr. Carlos Alberto de Oliveira Santos Júnior",
+                        "CPF: 12345678900",
+                        null,
+                        "AC CyberCore JUS v5",
+                        "8A7F4B2C91D0E3F5",
+                        "Assinatura de Documento Digital",
+                        "São Paulo, SP",
+                        theme.defaultCpfMode() != null ? theme.defaultCpfMode() : CpfDisplayMode.FULL,
+                        theme.defaultIncludeDateTime(),
+                        theme.formatCustomField()
+                );
+
+                byte[] pngBytes = PdfSealRenderer.renderToPngBytes(theme, sampleData);
+                previewImageView.setImage(new Image(new ByteArrayInputStream(pngBytes)));
+            } catch (Exception ex) {
+                logger.warn("Erro ao renderizar preview do selo: {}", ex.getMessage());
+            }
+        });
+    }
+
+    private void handleSetDefault() {
+        PdfSealTheme selected = listViewSeals.getSelectionModel().getSelectedItem();
+        if (selected == null) return;
+
+        try {
+            AgentConfiguration currentConfig = configService.loadConfiguration();
+            AgentConfiguration newConfig = new AgentConfiguration(
+                    currentConfig.requireConfirmation(),
+                    currentConfig.alwaysPromptPin(),
+                    currentConfig.autoStart(),
+                    selected.id(),
+                    currentConfig.defaultCpfDisplayMode(),
+                    currentConfig.defaultIncludeDateTime(),
+                    currentConfig.serverPort()
+            );
+            configService.saveConfiguration(newConfig);
+            this.currentDefaultThemeId = selected.id();
+
+            lblFeedback.setText("✓ Selo '" + selected.name() + "' definido como padrão com sucesso!");
+            listViewSeals.refresh();
+            onThemeSelected(selected);
+        } catch (Exception ex) {
+            showError("Falha ao salvar configuração: " + ex.getMessage());
+        }
+    }
+
+    private void handleCreateNewSeal() {
+        new SealDesignerDialog(stage, createdSeal -> {
+            refreshSealsList();
+            listViewSeals.getSelectionModel().select(createdSeal);
+            lblFeedback.setText("✓ Novo selo '" + createdSeal.name() + "' instalado!");
+        }).show();
+    }
+
+    private void handleEditClone() {
+        PdfSealTheme selected = listViewSeals.getSelectionModel().getSelectedItem();
+        if (selected == null) return;
+
+        new SealDesignerDialog(stage, selected, updatedSeal -> {
+            refreshSealsList();
+            listViewSeals.getSelectionModel().select(updatedSeal);
+            lblFeedback.setText("✓ Selo '" + updatedSeal.name() + "' salvo com sucesso!");
+        }).show();
+    }
+
+    private void handleDeleteCustomSeal() {
+        PdfSealTheme selected = listViewSeals.getSelectionModel().getSelectedItem();
+        if (selected == null || !selected.isCustom()) return;
+
+        Alert confirm = new Alert(Alert.AlertType.CONFIRMATION);
+        confirm.setTitle("Confirmar Exclusão");
+        confirm.setHeaderText(null);
+        confirm.setContentText("Deseja realmente remover o selo personalizado '" + selected.name() + "'?");
+        confirm.initOwner(stage);
+        ThemeManager.applyTheme(confirm.getDialogPane().getScene());
+
+        Optional<ButtonType> result = confirm.showAndWait();
+        if (result.isPresent() && result.get() == ButtonType.OK) {
+            try {
+                PdfSealThemeRegistry.uninstallCustomTheme(selected.id());
+                if (selected.id().equalsIgnoreCase(currentDefaultThemeId)) {
+                    currentDefaultThemeId = PdfSealThemeRegistry.DEFAULT_THEME_ID;
+                }
+                refreshSealsList();
+            } catch (Exception ex) {
+                showError("Falha ao excluir selo: " + ex.getMessage());
+            }
+        }
+    }
+
+    private void handleImportSeal() {
+        FileChooser chooser = new FileChooser();
+        chooser.setTitle("Selecionar Arquivo de Selo (.json)");
+        chooser.getExtensionFilters().add(new FileChooser.ExtensionFilter("Arquivos JSON de Selo (*.json)", "*.json"));
+
+        File file = chooser.showOpenDialog(stage);
+        if (file != null) {
+            try {
+                PdfSealTheme imported = PdfSealThemeRegistry.getStorage().importSeal(file.toPath());
+                PdfSealThemeRegistry.registerTheme(imported);
+                refreshSealsList();
+                listViewSeals.getSelectionModel().select(imported);
+                lblFeedback.setText("✓ Selo '" + imported.name() + "' importado e instalado com sucesso!");
+            } catch (Exception ex) {
+                showError("Falha ao importar selo: " + ex.getMessage());
+            }
+        }
+    }
+
+    private void handleExportSeal() {
+        PdfSealTheme selected = listViewSeals.getSelectionModel().getSelectedItem();
+        if (selected == null) return;
+
+        FileChooser chooser = new FileChooser();
+        chooser.setTitle("Exportar Selo Digital (.json)");
+        chooser.setInitialFileName(selected.id() + ".json");
+        chooser.getExtensionFilters().add(new FileChooser.ExtensionFilter("Arquivos JSON de Selo (*.json)", "*.json"));
+
+        File file = chooser.showSaveDialog(stage);
+        if (file != null) {
+            try {
+                PdfSealThemeRegistry.getStorage().exportSeal(selected, file.toPath());
+                lblFeedback.setText("✓ Selo exportado com sucesso para " + file.getName());
+            } catch (Exception ex) {
+                showError("Falha ao exportar selo: " + ex.getMessage());
+            }
+        }
+    }
+
+    private void showError(String msg) {
+        Alert a = new Alert(Alert.AlertType.ERROR);
+        a.setTitle("Erro");
+        a.setHeaderText(null);
+        a.setContentText(msg);
+        a.initOwner(stage);
+        ThemeManager.applyTheme(a.getDialogPane().getScene());
+        a.showAndWait();
+    }
+
+    public void show() {
+        stage.centerOnScreen();
+        stage.show();
+    }
+
+    public void showAndWait() {
+        stage.centerOnScreen();
+        stage.showAndWait();
+    }
+
+    /**
+     * Célula customizada para a listagem visual dos selos.
+     */
+    private class SealListCell extends ListCell<PdfSealTheme> {
+        @Override
+        protected void updateItem(PdfSealTheme item, boolean empty) {
+            super.updateItem(item, empty);
+            if (empty || item == null) {
+                setGraphic(null);
+                setText(null);
+            } else {
+                HBox card = new HBox(10);
+                card.setAlignment(Pos.CENTER_LEFT);
+                card.setPadding(new Insets(8, 10, 8, 10));
+
+                VBox textBox = new VBox(2);
+                Label lblName = new Label(item.name());
+                lblName.setStyle("-fx-font-weight: bold; -fx-font-size: 12.5px;");
+                lblName.maxWidthProperty().bind(listViewSeals.widthProperty().subtract(120));
+                lblName.setWrapText(true);
+
+                String desc = (item.description() != null && !item.description().isBlank())
+                        ? item.description() : "Identidade visual de assinatura";
+                Label lblDesc = new Label(desc);
+                lblDesc.setStyle("-fx-font-size: 11px; -fx-text-fill: #64748b;");
+                lblDesc.maxWidthProperty().bind(listViewSeals.widthProperty().subtract(120));
+                lblDesc.setWrapText(true);
+
+                textBox.getChildren().addAll(lblName, lblDesc);
+                HBox.setHgrow(textBox, Priority.ALWAYS);
+
+                VBox badgesBox = new VBox(4);
+                badgesBox.setAlignment(Pos.CENTER_RIGHT);
+
+                boolean isDefault = item.id().equalsIgnoreCase(currentDefaultThemeId);
+                if (isDefault) {
+                    Label badgeDefault = new Label("★ PADRÃO");
+                    badgeDefault.setStyle("-fx-background-color: #0284c7; -fx-text-fill: #ffffff; -fx-font-size: 9.5px; -fx-font-weight: bold; -fx-padding: 2px 6px; -fx-background-radius: 4px;");
+                    badgesBox.getChildren().add(badgeDefault);
+                }
+
+                Label badgeType = new Label(item.isCustom() ? "Personalizado" : "Sistema");
+                badgeType.setStyle(item.isCustom()
+                        ? "-fx-background-color: #fef3c7; -fx-text-fill: #b45309; -fx-font-size: 9.5px; -fx-padding: 2px 6px; -fx-background-radius: 4px;"
+                        : "-fx-background-color: #e0f2fe; -fx-text-fill: #0369a1; -fx-font-size: 9.5px; -fx-padding: 2px 6px; -fx-background-radius: 4px;");
+                badgesBox.getChildren().add(badgeType);
+
+                card.getChildren().addAll(textBox, badgesBox);
+                setGraphic(card);
+                setText(null);
+            }
+        }
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/SettingsView.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/SettingsView.java
new file mode 100644
index 0000000..946f3ed
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/SettingsView.java
@@ -0,0 +1,296 @@
+package br.com.cybercore.signer.ui.view;
+
+import br.com.cybercore.signer.core.config.AgentConfiguration;
+import br.com.cybercore.signer.core.config.AgentConfigurationService;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealTheme;
+import br.com.cybercore.signer.core.pdf.seal.PdfSealThemeRegistry;
+import br.com.cybercore.signer.core.security.AuthorizedApplication;
+import br.com.cybercore.signer.core.security.PinSessionManager;
+import br.com.cybercore.signer.core.security.SmartCardSessionManager;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.control.Alert;
+import javafx.scene.control.Button;
+import javafx.scene.control.CheckBox;
+import javafx.scene.control.Label;
+import javafx.scene.control.ScrollPane;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.VBox;
+import javafx.stage.Stage;
+
+import java.util.List;
+
+/**
+ * Painel de Configurações, Gerenciamento de Selos Visuais e Aplicações Autorizadas.
+ */
+@SuppressWarnings("this-escape")
+public final class SettingsView extends VBox {
+
+    private final VBox appsContainer = new VBox(10);
+    private final VBox sealsContainer = new VBox(8);
+    private final Label saveFeedbackLabel = new Label();
+
+    private java.util.function.Consumer<String> onRevokeApplication;
+
+    public SettingsView() {
+        initView();
+    }
+
+    private void initView() {
+        setSpacing(16);
+        setPadding(new Insets(20, 24, 20, 24));
+        getStyleClass().add("content-pane");
+
+        AgentConfigurationService configService = AgentConfigurationService.getInstance();
+        AgentConfiguration config = configService.getConfig();
+
+        // Header
+        VBox headerBox = new VBox(6);
+        Label titleLabel = new Label("Configurações do Agente");
+        titleLabel.getStyleClass().add("brand-title");
+
+        Label subtitleLabel = new Label("Parâmetros de segurança local, identidade visual dos selos e aplicações autorizadas.");
+        subtitleLabel.getStyleClass().add("brand-subtitle");
+
+        saveFeedbackLabel.setStyle("-fx-text-fill: #10b981; -fx-font-size: 11.5px; -fx-font-weight: bold;");
+
+        headerBox.getChildren().addAll(titleLabel, subtitleLabel, saveFeedbackLabel);
+
+        // Seção Segurança
+        VBox secBox = new VBox(12);
+        secBox.getStyleClass().add("dialog-box");
+        secBox.setPadding(new Insets(14, 16, 14, 16));
+        Label secTitle = new Label("Segurança e Confirmação");
+        secTitle.getStyleClass().add("section-title");
+
+        CheckBox chkConfirmAlways = new CheckBox("Sempre exigir confirmação na tela antes de assinar (Recomendado)");
+        chkConfirmAlways.setSelected(config.requireConfirmation());
+        chkConfirmAlways.setOnAction(e -> {
+            boolean sel = chkConfirmAlways.isSelected();
+            AgentConfiguration current = configService.getConfig();
+            configService.updateConfig(new AgentConfiguration(
+                    sel,
+                    current.alwaysPromptPin(),
+                    current.autoStart(),
+                    current.defaultSealThemeId(),
+                    current.defaultCpfDisplayMode(),
+                    current.defaultIncludeDateTime(),
+                    current.serverPort()
+            ));
+            notifySave("Preferência de confirmação na tela salva.");
+        });
+
+        CheckBox chkAlwaysAskPin = new CheckBox("Sempre exigir digitação de PIN para Tokens A3 (Sem cache)");
+        chkAlwaysAskPin.setSelected(config.alwaysPromptPin());
+        PinSessionManager.getInstance().setAlwaysPromptPin(config.alwaysPromptPin());
+
+        chkAlwaysAskPin.setOnAction(e -> {
+            boolean sel = chkAlwaysAskPin.isSelected();
+            PinSessionManager.getInstance().setAlwaysPromptPin(sel);
+            if (sel) {
+                SmartCardSessionManager.resetCardSessions();
+            }
+            AgentConfiguration current = configService.getConfig();
+            configService.updateConfig(new AgentConfiguration(
+                    current.requireConfirmation(),
+                    sel,
+                    current.autoStart(),
+                    current.defaultSealThemeId(),
+                    current.defaultCpfDisplayMode(),
+                    current.defaultIncludeDateTime(),
+                    current.serverPort()
+            ));
+            notifySave("Política de PIN atualizada.");
+        });
+
+        CheckBox chkAutoStart = new CheckBox("Iniciar agente automaticamente com o sistema operacional");
+        chkAutoStart.setSelected(config.autoStart());
+        chkAutoStart.setOnAction(e -> {
+            boolean sel = chkAutoStart.isSelected();
+            AgentConfiguration current = configService.getConfig();
+            configService.updateConfig(new AgentConfiguration(
+                    current.requireConfirmation(),
+                    current.alwaysPromptPin(),
+                    sel,
+                    current.defaultSealThemeId(),
+                    current.defaultCpfDisplayMode(),
+                    current.defaultIncludeDateTime(),
+                    current.serverPort()
+            ));
+            notifySave("Preferência de inicialização salva.");
+        });
+
+        HBox pinActionsBox = new HBox(12);
+        pinActionsBox.setAlignment(Pos.CENTER_LEFT);
+
+        Button btnClearPins = new Button("Limpar PINs Salvos na Sessão");
+        btnClearPins.getStyleClass().add("btn-secondary");
+        btnClearPins.setStyle("-fx-padding: 6px 14px; -fx-font-size: 12px;");
+
+        Label pinStatusLabel = new Label();
+        pinStatusLabel.setStyle("-fx-text-fill: #34d399; -fx-font-size: 12px;");
+
+        btnClearPins.setOnAction(e -> {
+            PinSessionManager.getInstance().clearAll();
+            SmartCardSessionManager.resetCardSessions();
+            pinStatusLabel.setText("✓ Todos os PINs e sessões de tokens foram zerados.");
+        });
+
+        pinActionsBox.getChildren().addAll(btnClearPins, pinStatusLabel);
+        secBox.getChildren().addAll(secTitle, chkConfirmAlways, chkAlwaysAskPin, chkAutoStart, pinActionsBox);
+
+        // Seção Selos Visuais de Assinatura
+        VBox sealsBox = new VBox(10);
+        sealsBox.getStyleClass().add("dialog-box");
+        sealsBox.setPadding(new Insets(14, 16, 14, 16));
+        Label sealsTitle = new Label("Selos Visuais e Identidade Gráfica");
+        sealsTitle.getStyleClass().add("section-title");
+
+        HBox sealHeaderRow = new HBox(12);
+        sealHeaderRow.setAlignment(Pos.CENTER_LEFT);
+
+        Label lblSealsDesc = new Label("Gerencie os temas e identidades gráficas instaladas para assinaturas PDF:");
+        lblSealsDesc.setStyle("-fx-text-fill: #94a3b8; -fx-font-size: 12px;");
+        HBox.setHgrow(lblSealsDesc, Priority.ALWAYS);
+
+        Button btnCreateSeal = new Button("🎨 Criar ou Instalar Selo...");
+        btnCreateSeal.getStyleClass().add("btn-primary");
+        btnCreateSeal.setStyle("-fx-padding: 6px 14px; -fx-font-size: 12px;");
+        btnCreateSeal.setOnAction(e -> openSealDesigner());
+
+        sealHeaderRow.getChildren().addAll(lblSealsDesc, btnCreateSeal);
+
+        refreshSealsList();
+
+        sealsBox.getChildren().addAll(sealsTitle, sealHeaderRow, sealsContainer);
+
+        // Seção Aplicações Autorizadas
+        VBox appsBox = new VBox(10);
+        appsBox.getStyleClass().add("dialog-box");
+        appsBox.setPadding(new Insets(14, 16, 14, 16));
+        Label appsTitle = new Label("Aplicações Web Autorizadas");
+        appsTitle.getStyleClass().add("section-title");
+
+        ScrollPane scrollApps = new ScrollPane(appsContainer);
+        scrollApps.setFitToWidth(true);
+        scrollApps.setPrefHeight(150);
+        scrollApps.setStyle("-fx-background: transparent; -fx-background-color: transparent;");
+
+        appsBox.getChildren().addAll(appsTitle, scrollApps);
+
+        getChildren().addAll(headerBox, secBox, sealsBox, appsBox);
+    }
+
+    private void openSealDesigner() {
+        Stage ownerStage = (getScene() != null && getScene().getWindow() instanceof Stage s) ? s : null;
+        new SealDesignerDialog(ownerStage, newSeal -> {
+            refreshSealsList();
+            notifySave("Novo selo '" + newSeal.name() + "' instalado com sucesso!");
+        }).show();
+    }
+
+    private void refreshSealsList() {
+        sealsContainer.getChildren().clear();
+        List<PdfSealTheme> themes = PdfSealThemeRegistry.listThemes();
+
+        for (PdfSealTheme theme : themes) {
+            HBox item = new HBox(10);
+            item.setAlignment(Pos.CENTER_LEFT);
+            item.getStyleClass().add("diagnostic-item");
+            item.setPadding(new Insets(6, 12, 6, 12));
+
+            VBox info = new VBox(2);
+            Label lblName = new Label(theme.name() + " (" + theme.id() + ")");
+            lblName.getStyleClass().add("cert-title");
+
+            String desc = theme.description() != null ? theme.description() : "Selo visual";
+            Label lblDesc = new Label(desc);
+            lblDesc.getStyleClass().add("cert-detail");
+
+            info.getChildren().addAll(lblName, lblDesc);
+            HBox.setHgrow(info, Priority.ALWAYS);
+
+            Label badge = new Label(theme.isCustom() ? "Personalizado" : "Sistema");
+            badge.getStyleClass().add(theme.isCustom() ? "diagnostic-value-warn" : "diagnostic-value-ok");
+
+            item.getChildren().addAll(info, badge);
+
+            if (theme.isCustom()) {
+                Button btnDelete = new Button("Excluir");
+                btnDelete.getStyleClass().add("btn-secondary");
+                btnDelete.setStyle("-fx-padding: 3px 8px; -fx-font-size: 11px; -fx-text-fill: #f87171;");
+                btnDelete.setOnAction(e -> {
+                    try {
+                        PdfSealThemeRegistry.uninstallCustomTheme(theme.id());
+                        refreshSealsList();
+                        notifySave("Selo '" + theme.name() + "' removido.");
+                    } catch (Exception ex) {
+                        showError("Falha ao remover selo: " + ex.getMessage());
+                    }
+                });
+                item.getChildren().add(btnDelete);
+            }
+
+            sealsContainer.getChildren().add(item);
+        }
+    }
+
+    private void notifySave(String text) {
+        saveFeedbackLabel.setText("✓ " + text);
+    }
+
+    private void showError(String msg) {
+        Alert a = new Alert(Alert.AlertType.ERROR);
+        a.setTitle("Erro");
+        a.setHeaderText(null);
+        a.setContentText(msg);
+        a.showAndWait();
+    }
+
+    public void setOnRevokeApplication(java.util.function.Consumer<String> onRevokeApplication) {
+        this.onRevokeApplication = onRevokeApplication;
+    }
+
+    public void updateApplications(List<AuthorizedApplication> applications) {
+        appsContainer.getChildren().clear();
+
+        if (applications == null || applications.isEmpty()) {
+            Label emptyLabel = new Label("Nenhuma aplicação autorizada registrada ainda.\nNovas aplicações solicitarão permissão no primeiro acesso.");
+            emptyLabel.getStyleClass().add("section-subtitle");
+            appsContainer.getChildren().add(emptyLabel);
+            return;
+        }
+
+        for (AuthorizedApplication app : applications) {
+            HBox card = new HBox(12);
+            card.setAlignment(Pos.CENTER_LEFT);
+            card.getStyleClass().add("diagnostic-item");
+
+            VBox info = new VBox(4);
+            Label nameLabel = new Label(app.name() + " (" + app.applicationId() + ")");
+            nameLabel.getStyleClass().add("cert-title");
+
+            Label originsLabel = new Label("Origens: " + String.join(", ", app.allowedOrigins()));
+            originsLabel.getStyleClass().add("cert-detail");
+
+            info.getChildren().addAll(nameLabel, originsLabel);
+            HBox.setHgrow(info, Priority.ALWAYS);
+
+            Label statusLabel = new Label(app.enabled() ? "Autorizada" : "Revogada");
+            statusLabel.getStyleClass().add(app.enabled() ? "diagnostic-value-ok" : "diagnostic-value-warn");
+
+            Button btnRevoke = new Button("Revogar");
+            btnRevoke.getStyleClass().add("btn-secondary");
+            btnRevoke.setStyle("-fx-padding: 4px 10px; -fx-font-size: 11px; -fx-text-fill: #f87171;");
+            btnRevoke.setOnAction(e -> {
+                if (onRevokeApplication != null) {
+                    onRevokeApplication.accept(app.applicationId());
+                }
+            });
+
+            card.getChildren().addAll(info, statusLabel, btnRevoke);
+            appsContainer.getChildren().add(card);
+        }
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/SignaturePromptDialog.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/SignaturePromptDialog.java
new file mode 100644
index 0000000..e304a75
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/SignaturePromptDialog.java
@@ -0,0 +1,259 @@
+package br.com.cybercore.signer.ui.view;
+
+import br.com.cybercore.signer.core.domain.CertificateType;
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.domain.SigningContext;
+import br.com.cybercore.signer.core.security.PinSessionManager;
+import br.com.cybercore.signer.ui.CyberCoreUiConstants;
+import br.com.cybercore.signer.ui.theme.ThemeManager;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.CheckBox;
+import javafx.scene.control.Label;
+import javafx.scene.control.PasswordField;
+import javafx.scene.layout.GridPane;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.VBox;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+
+import java.util.HexFormat;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+
+/**
+ * Diálogo modal de autorização explícita do usuário para assinatura digital,
+ * com gerenciamento flexível de PIN para tokens A3 (sempre pedir PIN vs salvar na sessão).
+ */
+public class SignaturePromptDialog {
+
+    private final Stage stage;
+    private final CompletableFuture<Boolean> approvalFuture = new CompletableFuture<>();
+
+    public SignaturePromptDialog(Stage owner, String applicationName, String origin,
+                                 ManagedCertificate certificate, SigningContext context) {
+        this(owner, applicationName, origin, certificate, context, null, null, false);
+    }
+
+    public SignaturePromptDialog(Stage owner, String applicationName, String origin,
+                                 ManagedCertificate certificate, SigningContext context,
+                                 String documentName, String documentType, boolean isAuthentication) {
+        stage = new Stage();
+        stage.initModality(Modality.APPLICATION_MODAL);
+        if (owner != null) {
+            stage.initOwner(owner);
+        }
+        stage.setTitle(isAuthentication
+                ? "CyberCore Signer — Solicitação de Login / Autenticação"
+                : "CyberCore Signer — Solicitação de Assinatura");
+        stage.setResizable(false);
+
+        initLayout(applicationName, origin, certificate, context, documentName, documentType, isAuthentication);
+    }
+
+    private void initLayout(String appName, String origin, ManagedCertificate cert, SigningContext context,
+                            String documentName, String documentType, boolean isAuthentication) {
+        VBox root = new VBox(18);
+        root.getStyleClass().add("dialog-container");
+        root.setPrefWidth(540);
+
+        Label header = new Label(isAuthentication ? "🔑 SOLICITAÇÃO DE LOGIN DIGITAL" : "SOLICITAÇÃO DE ASSINATURA");
+        header.getStyleClass().add("dialog-header");
+
+        Label desc = new Label(isAuthentication
+                ? "Uma aplicação web está solicitando autenticação de identidade com seu Certificado Digital ICP-Brasil."
+                : "Uma aplicação web está solicitando a assinatura digital de um documento.");
+        desc.getStyleClass().add("brand-subtitle");
+
+        // Caixa de Detalhes
+        VBox detailsBox = new VBox(12);
+        detailsBox.getStyleClass().add("dialog-box");
+
+        GridPane grid = new GridPane();
+        grid.setHgap(16);
+        grid.setVgap(10);
+
+        int row = 0;
+        addField(grid, row++, "Sistema:", appName + " (" + (origin != null ? origin : "Local") + ")");
+        if (isAuthentication) {
+            addField(grid, row++, "Operação:", "Autenticação de Usuário (Challenge-Response)");
+        } else {
+            if (documentName != null && !documentName.isBlank()) {
+                String docLabel = (documentType != null && !documentType.isBlank())
+                        ? "[" + documentType.toUpperCase() + "] " + documentName
+                        : documentName;
+                addField(grid, row++, "Documento:", docLabel);
+            }
+            addField(grid, row++, "Operação:", "Assinatura Digital (Digest)");
+        }
+        addField(grid, row++, "Certificado:", cert.commonName() != null ? cert.commonName() : cert.alias());
+        addField(grid, row++, "Tipo / Dispositivo:", cert.type().getCode() + " • " +
+                (cert.hardwareDeviceName() != null ? cert.hardwareDeviceName() : cert.type().getLabel()));
+        addField(grid, row++, "Algoritmo:", context.algorithm());
+
+        detailsBox.getChildren().add(grid);
+
+        // Caixa do Hash / Digest
+        VBox hashBox = new VBox(6);
+        Label hashLabel = new Label("Hash do Documento (SHA-256 Digest):");
+        hashLabel.getStyleClass().add("dialog-field-title");
+
+        String hashHex = HexFormat.of().formatHex(context.digest());
+        Label hashValue = new Label(hashHex);
+        hashValue.getStyleClass().add("dialog-hash-value");
+        hashValue.setWrapText(true);
+
+        hashBox.getChildren().addAll(hashLabel, hashValue);
+        detailsBox.getChildren().add(hashBox);
+
+        // Seção de PIN para Tokens / Smart Cards A3
+        VBox pinContainer = new VBox(10);
+        PasswordField pinField = new PasswordField();
+        CheckBox cbSavePin = new CheckBox("Salvar PIN durante esta sessão (não solicitar nas próximas assinaturas)");
+        cbSavePin.setStyle("-fx-font-size: 12px;");
+
+        boolean isA3 = cert.type() == CertificateType.A3;
+        boolean isWindowsStore = "provider-win-store".equalsIgnoreCase(cert.providerId());
+        boolean hasStoredPin = isA3 && PinSessionManager.getInstance().hasPin(cert.id());
+
+        if (isA3) {
+            pinContainer.getStyleClass().add("dialog-box");
+            Label pinSectionTitle = new Label("AUTENTICAÇÃO DO TOKEN / SMART CARD A3");
+            pinSectionTitle.getStyleClass().add("dialog-field-title");
+            pinContainer.getChildren().add(pinSectionTitle);
+
+            if (isWindowsStore) {
+                VBox winBox = new VBox(6);
+                Label winTitle = new Label("🔐 Autenticação nativa pelo Windows / Driver do Token");
+                winTitle.setStyle("-fx-text-fill: -fx-accent; -fx-font-weight: bold; -fx-font-size: 13px;");
+
+                Label winDesc = new Label(
+                        "O PIN deste dispositivo é gerenciado diretamente pelo driver nativo (SafeSign / Windows Security). " +
+                        "Caso o token ainda não esteja autenticado, a janela segura do driver será aberta automaticamente."
+                );
+                winDesc.setStyle("-fx-text-fill: -fx-text-secondary; -fx-font-size: 12px;");
+                winDesc.setWrapText(true);
+
+                winBox.getChildren().addAll(winTitle, winDesc);
+                pinContainer.getChildren().add(winBox);
+            } else {
+                pinField.setPromptText("Digite o PIN do token...");
+
+                if (hasStoredPin) {
+                    HBox rememberedBox = new HBox(12);
+                    rememberedBox.setAlignment(Pos.CENTER_LEFT);
+
+                    Label rememberedBadge = new Label("● PIN salvo nesta sessão ativa");
+                    rememberedBadge.setStyle("-fx-text-fill: #10b981; -fx-font-weight: bold; -fx-font-size: 12px;");
+
+                    Button btnChangePin = new Button("Alterar PIN");
+                    btnChangePin.getStyleClass().add("btn-secondary");
+                    btnChangePin.setStyle("-fx-padding: 4px 10px; -fx-font-size: 11px;");
+
+                    VBox inputWrapper = new VBox(8);
+                    inputWrapper.setVisible(false);
+                    inputWrapper.setManaged(false);
+                    inputWrapper.getChildren().addAll(new Label("Novo PIN:"), pinField, cbSavePin);
+
+                    btnChangePin.setOnAction(e -> {
+                        boolean nowVisible = !inputWrapper.isVisible();
+                        inputWrapper.setVisible(nowVisible);
+                        inputWrapper.setManaged(nowVisible);
+                        btnChangePin.setText(nowVisible ? "Cancelar alteração" : "Alterar PIN");
+                        if (nowVisible) {
+                            cbSavePin.setSelected(true);
+                        }
+                    });
+
+                    rememberedBox.getChildren().addAll(rememberedBadge, btnChangePin);
+                    pinContainer.getChildren().addAll(rememberedBox, inputWrapper);
+                } else {
+                    VBox inputWrapper = new VBox(8);
+                    Label pinPromptLabel = new Label("Informe o PIN do dispositivo para autorizar a chave privada:");
+                    pinPromptLabel.setStyle("-fx-text-fill: -fx-text-secondary; -fx-font-size: 12px;");
+
+                    cbSavePin.setSelected(false);
+                    inputWrapper.getChildren().addAll(pinPromptLabel, pinField, cbSavePin);
+                    pinContainer.getChildren().add(inputWrapper);
+                }
+            }
+
+            detailsBox.getChildren().add(pinContainer);
+        }
+
+        // Label de Alerta de Validação
+        Label validationLabel = new Label();
+        validationLabel.setStyle("-fx-text-fill: #f87171; -fx-font-size: 12px;");
+        validationLabel.setVisible(false);
+
+        // Botões de Ação
+        HBox actionsRow = new HBox(12);
+        actionsRow.setAlignment(Pos.CENTER_RIGHT);
+
+        Button btnCancel = new Button("Cancelar");
+        btnCancel.getStyleClass().add("btn-cancel");
+        btnCancel.setOnAction(e -> {
+            approvalFuture.complete(false);
+            stage.close();
+        });
+
+        Button btnConfirm = new Button(isAuthentication ? "Confirmar e Entrar" : "Confirmar e Assinar");
+        btnConfirm.getStyleClass().add("btn-primary");
+        btnConfirm.setDefaultButton(true);
+        btnConfirm.setOnAction(e -> {
+            if (isA3 && !isWindowsStore) {
+                String typedPin = pinField.getText();
+                boolean pinProvided = (typedPin != null && !typedPin.isBlank());
+
+                if (!hasStoredPin && !pinProvided) {
+                    validationLabel.setText("Atenção: O PIN do token é obrigatório para assinar via PKCS#11.");
+                    validationLabel.setVisible(true);
+                    pinField.requestFocus();
+                    return;
+                }
+
+                if (pinProvided) {
+                    char[] pinChars = typedPin.toCharArray();
+                    if (cbSavePin.isSelected()) {
+                        PinSessionManager.getInstance().savePin(cert.id(), pinChars);
+                    } else {
+                        PinSessionManager.getInstance().clearPin(cert.id());
+                    }
+                }
+            }
+
+            approvalFuture.complete(true);
+            stage.close();
+        });
+
+        actionsRow.getChildren().addAll(btnCancel, btnConfirm);
+
+        root.getChildren().addAll(header, desc, detailsBox, validationLabel, actionsRow);
+
+        Scene scene = new Scene(root);
+        ThemeManager.applyTheme(scene);
+
+        stage.setScene(scene);
+        stage.setOnCloseRequest(e -> approvalFuture.complete(false));
+    }
+
+    private void addField(GridPane grid, int row, String title, String value) {
+        Label titleLabel = new Label(title);
+        titleLabel.getStyleClass().add("dialog-field-title");
+
+        Label valLabel = new Label(value);
+        valLabel.getStyleClass().add("dialog-field-value");
+
+        grid.add(titleLabel, 0, row);
+        grid.add(valLabel, 1, row);
+    }
+
+    public CompletableFuture<Boolean> showAndAwait() {
+        stage.show();
+        stage.toFront();
+        return approvalFuture;
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/SignatureValidationDialog.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/SignatureValidationDialog.java
new file mode 100644
index 0000000..edcc2a1
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/SignatureValidationDialog.java
@@ -0,0 +1,395 @@
+package br.com.cybercore.signer.ui.view;
+
+import br.com.cybercore.signer.core.validation.SignatureValidationService;
+import br.com.cybercore.signer.core.validation.ValidationResult;
+import br.com.cybercore.signer.core.validation.ValidationSignerInfo;
+import br.com.cybercore.signer.core.validation.ValidationStatus;
+import br.com.cybercore.signer.ui.components.SvgIcons;
+import br.com.cybercore.signer.ui.theme.ThemeManager;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.Alert;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.control.RadioButton;
+import javafx.scene.control.ScrollPane;
+import javafx.scene.control.Separator;
+import javafx.scene.control.TextField;
+import javafx.scene.control.ToggleGroup;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.VBox;
+import javafx.stage.FileChooser;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
+import java.nio.file.Files;
+
+/**
+ * Diálogo unificado para Validação Criptográfica de Assinaturas Digitais.
+ * Suporta Assinatura Incorporada / Embutida (Attached / PAdES / P7M / XML)
+ * e Assinatura Destacada (Detached / P7S).
+ */
+@SuppressWarnings("this-escape")
+public final class SignatureValidationDialog {
+
+    private static final Logger logger = LoggerFactory.getLogger(SignatureValidationDialog.class);
+
+    private final Stage stage;
+    private final boolean isTimestamp;
+    private final SignatureValidationService validationService = new SignatureValidationService();
+
+    private RadioButton rbAttached;
+    private RadioButton rbDetached;
+
+    private VBox docBox;
+    private TextField txtDocPath;
+    private TextField txtSigPath;
+    private Label lblSigPath;
+
+    private File docFile;
+    private File sigFile;
+
+    private VBox resultBox;
+    private Button btnSaveExtracted;
+    private byte[] lastExtractedContent;
+
+    public SignatureValidationDialog(Stage owner, boolean isTimestamp) {
+        this.isTimestamp = isTimestamp;
+
+        this.stage = new Stage();
+        this.stage.initModality(Modality.APPLICATION_MODAL);
+        if (owner != null) {
+            this.stage.initOwner(owner);
+        }
+        this.stage.setTitle(isTimestamp ? "CyberCore Signer — Validação de Carimbo do Tempo" : "CyberCore Signer — Validação de Assinatura Digital");
+        this.stage.setResizable(true);
+        this.stage.setMinWidth(680);
+        this.stage.setMinHeight(520);
+
+        initLayout();
+    }
+
+    private void initLayout() {
+        VBox root = new VBox(16);
+        root.setPadding(new Insets(22));
+        root.getStyleClass().add("dialog-container");
+
+        HBox header = new HBox(12);
+        header.setAlignment(Pos.CENTER_LEFT);
+        header.getChildren().addAll(
+                isTimestamp ? SvgIcons.validateTimestampIcon() : SvgIcons.validateIcon(),
+                createHeaderLabel(
+                        isTimestamp ? "VALIDAÇÃO DE CARIMBO DO TEMPO" : "VALIDAÇÃO DE ASSINATURA DIGITAL",
+                        isTimestamp ? "Verifique a autenticidade e conformidade RFC 3161 TSP."
+                                : "Verifique a autenticidade, integridade e certificados de assinaturas incorporadas ou destacadas."
+                )
+        );
+
+        // Seletor de Tipo de Assinatura (Incorporada vs Destacada)
+        VBox typeBox = new VBox(8);
+        typeBox.getStyleClass().add("dialog-box");
+        Label lblTypeTitle = new Label("Tipo de Assinatura para Validação:");
+        lblTypeTitle.getStyleClass().add("dialog-field-title");
+
+        ToggleGroup modeGroup = new ToggleGroup();
+        rbAttached = new RadioButton("Assinatura Incorporada / Embutida (PDF assinado, P7M ou XML)");
+        rbAttached.setToggleGroup(modeGroup);
+        rbAttached.setSelected(true);
+        rbAttached.setOnAction(e -> updateModeView());
+
+        rbDetached = new RadioButton("Assinatura Destacada (Documento Original + Arquivo .p7s separado)");
+        rbDetached.setToggleGroup(modeGroup);
+        rbDetached.setOnAction(e -> updateModeView());
+
+        HBox radioRow = new HBox(18);
+        radioRow.getChildren().addAll(rbAttached, rbDetached);
+        typeBox.getChildren().addAll(lblTypeTitle, radioRow);
+
+        if (isTimestamp) {
+            typeBox.setVisible(false);
+            typeBox.setManaged(false);
+        }
+
+        // 1. Arquivo de Assinatura / Arquivo Assinado
+        VBox sigBox = new VBox(8);
+        sigBox.getStyleClass().add("dialog-box");
+        lblSigPath = new Label("Arquivo Assinado (.pdf, .p7m, .p7s, .xml):");
+        lblSigPath.getStyleClass().add("dialog-field-title");
+
+        HBox sigRow = new HBox(10);
+        txtSigPath = new TextField();
+        txtSigPath.setPromptText("Selecione o arquivo assinado...");
+        txtSigPath.setEditable(false);
+        HBox.setHgrow(txtSigPath, Priority.ALWAYS);
+
+        Button btnBrowseSig = new Button("Procurar...");
+        btnBrowseSig.getStyleClass().add("btn-secondary");
+        btnBrowseSig.setOnAction(e -> handleBrowseSig());
+
+        sigRow.getChildren().addAll(txtSigPath, btnBrowseSig);
+        sigBox.getChildren().addAll(lblSigPath, sigRow);
+
+        // 2. Documento Original (Visível apenas em modo Destacado)
+        docBox = new VBox(8);
+        docBox.getStyleClass().add("dialog-box");
+        Label lblDoc = new Label("Documento Original Separado:");
+        lblDoc.getStyleClass().add("dialog-field-title");
+
+        HBox docRow = new HBox(10);
+        txtDocPath = new TextField();
+        txtDocPath.setPromptText("Selecione o documento original...");
+        txtDocPath.setEditable(false);
+        HBox.setHgrow(txtDocPath, Priority.ALWAYS);
+
+        Button btnBrowseDoc = new Button("Procurar...");
+        btnBrowseDoc.getStyleClass().add("btn-secondary");
+        btnBrowseDoc.setOnAction(e -> handleBrowseDoc());
+
+        docRow.getChildren().addAll(txtDocPath, btnBrowseDoc);
+        docBox.getChildren().addAll(lblDoc, docRow);
+
+        // Painel Dinâmico de Resultados
+        resultBox = new VBox(10);
+        resultBox.setVisible(false);
+        resultBox.setManaged(false);
+        resultBox.getStyleClass().add("dialog-box");
+
+        ScrollPane scrollResult = new ScrollPane(resultBox);
+        scrollResult.setFitToWidth(true);
+        scrollResult.setStyle("-fx-background: transparent; -fx-background-color: transparent;");
+        VBox.setVgrow(scrollResult, Priority.ALWAYS);
+
+        // Rodapé
+        HBox footer = new HBox(12);
+        footer.setAlignment(Pos.CENTER_RIGHT);
+
+        btnSaveExtracted = new Button("Salvar Conteúdo Extraído...");
+        btnSaveExtracted.getStyleClass().add("btn-secondary");
+        btnSaveExtracted.setVisible(false);
+        btnSaveExtracted.setManaged(false);
+        btnSaveExtracted.setOnAction(e -> handleSaveExtracted());
+
+        HBox.setHgrow(btnSaveExtracted, Priority.NEVER);
+
+        Button btnClose = new Button("Fechar");
+        btnClose.getStyleClass().add("btn-secondary");
+        btnClose.setOnAction(e -> stage.close());
+
+        Button btnValidate = new Button("Validar Agora");
+        btnValidate.getStyleClass().add("btn-primary");
+        btnValidate.setDefaultButton(true);
+        btnValidate.setOnAction(e -> handleValidate());
+
+        footer.getChildren().addAll(btnSaveExtracted, btnClose, btnValidate);
+
+        root.getChildren().addAll(header, typeBox, sigBox, docBox, scrollResult, footer);
+
+        Scene scene = new Scene(root);
+        ThemeManager.applyTheme(scene);
+        stage.setScene(scene);
+
+        updateModeView();
+    }
+
+    private void updateModeView() {
+        boolean isAttached = rbAttached.isSelected() && !isTimestamp;
+        docBox.setVisible(!isAttached);
+        docBox.setManaged(!isAttached);
+
+        if (isAttached) {
+            lblSigPath.setText("Arquivo Assinado (.pdf, .p7m, .p7s, .xml):");
+            txtSigPath.setPromptText("Selecione o arquivo assinado com dados embutidos...");
+        } else {
+            lblSigPath.setText(isTimestamp ? "Arquivo de Carimbo (.tsr, .tsp, .p7s):" : "Arquivo de Assinatura (.p7s, .sig):");
+            txtSigPath.setPromptText("Selecione o arquivo de assinatura digital...");
+        }
+    }
+
+    private void handleBrowseDoc() {
+        FileChooser ch = new FileChooser();
+        ch.setTitle("Selecionar Documento Original");
+        File f = ch.showOpenDialog(stage);
+        if (f != null) {
+            docFile = f;
+            txtDocPath.setText(f.getAbsolutePath());
+        }
+    }
+
+    private void handleBrowseSig() {
+        FileChooser ch = new FileChooser();
+        ch.setTitle(rbAttached.isSelected() ? "Selecionar Arquivo Assinado" : "Selecionar Arquivo de Assinatura");
+
+        if (rbAttached.isSelected()) {
+            ch.getExtensionFilters().add(new FileChooser.ExtensionFilter("Documentos Assinados (*.pdf, *.p7m, *.p7s, *.xml)", "*.pdf", "*.p7m", "*.p7s", "*.xml", "*.*"));
+        } else {
+            ch.getExtensionFilters().add(new FileChooser.ExtensionFilter("Assinaturas Digitais (*.p7s, *.sig, *.tsr)", "*.p7s", "*.sig", "*.tsr", "*.*"));
+        }
+
+        File f = ch.showOpenDialog(stage);
+        if (f != null) {
+            sigFile = f;
+            txtSigPath.setText(f.getAbsolutePath());
+
+            // Detecção inteligente: se selecionar .pdf no modo destacado, sugere alternar para incorporada
+            if (f.getName().toLowerCase().endsWith(".pdf") && rbDetached.isSelected()) {
+                rbAttached.setSelected(true);
+                updateModeView();
+            }
+        }
+    }
+
+    private void handleValidate() {
+        if (sigFile == null || !sigFile.exists()) {
+            showAlert(Alert.AlertType.WARNING, "Arquivo Não Selecionado", "Por favor, selecione o arquivo a ser validado.");
+            return;
+        }
+
+        boolean isDetachedMode = rbDetached.isSelected() || isTimestamp;
+        if (isDetachedMode && (docFile == null || !docFile.exists())) {
+            showAlert(Alert.AlertType.WARNING, "Documento Original Não Selecionado",
+                    "Para validar assinatura destacada é necessário selecionar tanto o documento original quanto o arquivo de assinatura.");
+            return;
+        }
+
+        try {
+            byte[] sigBytes = Files.readAllBytes(sigFile.toPath());
+            ValidationResult result;
+
+            if (isDetachedMode) {
+                byte[] docBytes = Files.readAllBytes(docFile.toPath());
+                result = validationService.validateDetached(docBytes, sigBytes, docFile.getName());
+            } else {
+                result = validationService.validateAttached(sigBytes, sigFile.getName());
+            }
+
+            displayValidationResult(result);
+
+        } catch (Exception ex) {
+            logger.error("Erro na validação: {}", ex.getMessage(), ex);
+            showAlert(Alert.AlertType.ERROR, "Erro no Processamento", "Falha ao validar arquivo: " + ex.getMessage());
+        }
+    }
+
+    private void displayValidationResult(ValidationResult result) {
+        resultBox.getChildren().clear();
+        resultBox.setVisible(true);
+        resultBox.setManaged(true);
+
+        // 1. Badge de Status
+        HBox statusBadge = new HBox(10);
+        statusBadge.setAlignment(Pos.CENTER_LEFT);
+        statusBadge.setPadding(new Insets(10, 14, 10, 14));
+
+        Label lblBadge = new Label(result.status().getDescription());
+        lblBadge.setStyle("-fx-font-weight: bold; -fx-font-size: 14px;");
+
+        if (result.status() == ValidationStatus.VALID) {
+            statusBadge.setStyle("-fx-background-color: rgba(16, 185, 129, 0.15); -fx-background-radius: 6px; -fx-border-color: #10b981; -fx-border-radius: 6px;");
+            lblBadge.setStyle(lblBadge.getStyle() + " -fx-text-fill: #10b981;");
+        } else if (result.status() == ValidationStatus.INVALID) {
+            statusBadge.setStyle("-fx-background-color: rgba(239, 68, 68, 0.15); -fx-background-radius: 6px; -fx-border-color: #ef4444; -fx-border-radius: 6px;");
+            lblBadge.setStyle(lblBadge.getStyle() + " -fx-text-fill: #ef4444;");
+        } else {
+            statusBadge.setStyle("-fx-background-color: rgba(245, 158, 11, 0.15); -fx-background-radius: 6px; -fx-border-color: #f59e0b; -fx-border-radius: 6px;");
+            lblBadge.setStyle(lblBadge.getStyle() + " -fx-text-fill: #f59e0b;");
+        }
+
+        Label lblType = new Label("• Formato: " + result.type().getDescription());
+        lblType.setStyle("-fx-font-size: 12px; -fx-text-fill: #cbd5e1;");
+
+        statusBadge.getChildren().addAll(lblBadge, lblType);
+
+        Label lblMsg = new Label(result.summaryMessage());
+        lblMsg.setWrapText(true);
+        lblMsg.setStyle("-fx-font-size: 12.5px; -fx-font-weight: bold;");
+
+        resultBox.getChildren().addAll(statusBadge, lblMsg);
+
+        // 2. Lista de Signatários
+        if (!result.signers().isEmpty()) {
+            resultBox.getChildren().add(new Separator());
+            Label lblSignersTitle = new Label("DETALHES DOS SIGNATÁRIOS (" + result.signers().size() + "):");
+            lblSignersTitle.getStyleClass().add("dialog-field-title");
+            resultBox.getChildren().add(lblSignersTitle);
+
+            for (ValidationSignerInfo s : result.signers()) {
+                VBox card = new VBox(4);
+                card.getStyleClass().add("diagnostic-item");
+                card.setPadding(new Insets(10));
+
+                Label lblSignerName = new Label("Signatário: " + s.signerName());
+                lblSignerName.getStyleClass().add("cert-title");
+
+                String docText = s.identifier().isBlank() ? "" : s.identifier() + " • ";
+                Label lblCert = new Label(docText + "Emissor: " + s.issuer());
+                lblCert.getStyleClass().add("cert-detail");
+
+                Label lblTime = new Label("Data/Hora: " + s.signingTime() + " • Algoritmo: " + s.algorithm());
+                lblTime.getStyleClass().add("cert-detail");
+
+                Label lblIntegrity = new Label(s.isValid() ? "✓ Assinatura íntegra e chave pública conferida." : "✗ Falha na integridade da assinatura.");
+                lblIntegrity.setStyle(s.isValid() ? "-fx-text-fill: #10b981; -fx-font-weight: bold; -fx-font-size: 11.5px;" : "-fx-text-fill: #ef4444; -fx-font-weight: bold; -fx-font-size: 11.5px;");
+
+                card.getChildren().addAll(lblSignerName, lblCert, lblTime, lblIntegrity);
+                resultBox.getChildren().add(card);
+            }
+        }
+
+        // 3. Suporte a exportação de conteúdo extraído (caso CMS/P7M incorporado)
+        if (result.extractedContent() != null && result.extractedContent().length > 0) {
+            lastExtractedContent = result.extractedContent();
+            btnSaveExtracted.setVisible(true);
+            btnSaveExtracted.setManaged(true);
+        } else {
+            lastExtractedContent = null;
+            btnSaveExtracted.setVisible(false);
+            btnSaveExtracted.setManaged(false);
+        }
+    }
+
+    private void handleSaveExtracted() {
+        if (lastExtractedContent == null) return;
+        FileChooser chooser = new FileChooser();
+        chooser.setTitle("Salvar Documento Original Extraído");
+        chooser.setInitialFileName("documento_recuperado.bin");
+
+        File dest = chooser.showSaveDialog(stage);
+        if (dest != null) {
+            try {
+                Files.write(dest.toPath(), lastExtractedContent);
+                showAlert(Alert.AlertType.INFORMATION, "Documento Extraído", "O documento contido na assinatura foi salvo com sucesso em:\n" + dest.getAbsolutePath());
+            } catch (Exception ex) {
+                showAlert(Alert.AlertType.ERROR, "Erro ao Salvar", "Falha ao gravar arquivo: " + ex.getMessage());
+            }
+        }
+    }
+
+    private void showAlert(Alert.AlertType type, String title, String msg) {
+        Alert a = new Alert(type);
+        a.setTitle(title);
+        a.setHeaderText(null);
+        a.setContentText(msg);
+        a.initOwner(stage);
+        ThemeManager.applyTheme(a.getDialogPane().getScene());
+        a.showAndWait();
+    }
+
+    private VBox createHeaderLabel(String title, String subtitle) {
+        VBox box = new VBox(3);
+        Label t = new Label(title);
+        t.getStyleClass().add("dialog-header");
+        Label s = new Label(subtitle);
+        s.getStyleClass().add("dialog-subtitle");
+        box.getChildren().addAll(t, s);
+        return box;
+    }
+
+    public void show() {
+        stage.show();
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/TutorialDialog.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/TutorialDialog.java
new file mode 100644
index 0000000..dfd3af2
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/TutorialDialog.java
@@ -0,0 +1,118 @@
+package br.com.cybercore.signer.ui.view;
+
+import br.com.cybercore.signer.ui.CyberCoreUiConstants;
+import br.com.cybercore.signer.ui.theme.ThemeManager;
+import br.com.cybercore.signer.ui.components.SvgIcons;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.control.ScrollPane;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.VBox;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+
+import java.util.Objects;
+
+/**
+ * Diálogo interativo com instruções e tutoriais de uso do CyberCore Signer.
+ */
+@SuppressWarnings("this-escape")
+public final class TutorialDialog {
+
+    private final Stage stage;
+
+    public TutorialDialog(Stage owner) {
+        this.stage = new Stage();
+        this.stage.initModality(Modality.APPLICATION_MODAL);
+        if (owner != null) {
+            this.stage.initOwner(owner);
+        }
+        this.stage.setTitle("CyberCore Signer — Tutorial e Guia de Uso");
+        this.stage.setResizable(true);
+        this.stage.setMinWidth(640);
+        this.stage.setMinHeight(500);
+
+        initLayout();
+    }
+
+    private void initLayout() {
+        VBox root = new VBox(16);
+        root.setPadding(new Insets(24));
+        root.getStyleClass().add("dialog-container");
+
+        HBox header = new HBox(12);
+        header.setAlignment(Pos.CENTER_LEFT);
+        header.getChildren().addAll(
+                SvgIcons.tutorialIcon(),
+                createHeaderLabel("TUTORIAL E GUIA DE UTILIZAÇÃO", "Aprenda a assinar documentos e autorizar aplicações web com facilidade")
+        );
+
+        VBox content = new VBox(16);
+        content.getStyleClass().add("dialog-box");
+
+        addStep(content, "1. Assinatura Local Direta",
+                "Utilize os botões da tela inicial para assinar PDFs, XMLs, arquivos diversos ou múltiplos arquivos em lote. O agente calculará o hash SHA-256 e gerará a assinatura digital protegida.");
+
+        addStep(content, "2. Integração com Sistemas Web (CCSP/1)",
+                "Aplicações web corporativas conectam-se ao agente local através da porta 127.0.0.1:21325. Na primeira utilização de um site, o CyberCore solicitará sua autorização explícita.");
+
+        addStep(content, "3. Login com Certificado Digital",
+                "Quando um sistema web solicitar autenticação com certificado, você verá um diálogo azul destacando o desafio e o titular do certificado. Nenhuma senha ou chave privada é transmitida à rede.");
+
+        addStep(content, "4. Utilização de Tokens USB e Smart Cards (A3)",
+                "Ao conectar um token USB ou cartão na leitora, o CyberCore Signer detecta o dispositivo automaticamente. Ao assinar, informe o PIN no diálogo protegido.");
+
+        addStep(content, "5. Importação de Certificados A1 (.pfx / .p12)",
+                "Certificados A1 podem ser adicionados através do menu 'Arquivos Seguros' no painel lateral. A chave privada permanece isolada na máquina do usuário.");
+
+        ScrollPane scroll = new ScrollPane(content);
+        scroll.setFitToWidth(true);
+        scroll.setStyle("-fx-background: transparent; -fx-background-color: transparent;");
+        VBox.setVgrow(scroll, Priority.ALWAYS);
+
+        HBox footer = new HBox();
+        footer.setAlignment(Pos.CENTER_RIGHT);
+        Button btnClose = new Button(" Entendi", SvgIcons.closeIcon(13));
+        btnClose.getStyleClass().add("btn-primary");
+        btnClose.setPrefWidth(95);
+        btnClose.setOnAction(e -> stage.close());
+        footer.getChildren().add(btnClose);
+
+        root.getChildren().addAll(header, scroll, footer);
+
+        Scene scene = new Scene(root);
+        ThemeManager.applyTheme(scene);
+
+        stage.setScene(scene);
+    }
+
+    private void addStep(VBox container, String title, String description) {
+        VBox box = new VBox(4);
+        Label t = new Label(title);
+        t.getStyleClass().add("dialog-header");
+        t.setStyle("-fx-font-size: 13.5px;");
+        Label d = new Label(description);
+        d.setWrapText(true);
+        d.getStyleClass().add("dialog-field-value");
+        box.getChildren().addAll(t, d);
+        container.getChildren().add(box);
+    }
+
+    private VBox createHeaderLabel(String title, String subtitle) {
+        VBox box = new VBox(3);
+        Label t = new Label(title);
+        t.getStyleClass().add("dialog-header");
+        Label s = new Label(subtitle);
+        s.getStyleClass().add("dialog-subtitle");
+        box.getChildren().addAll(t, s);
+        return box;
+    }
+
+    public void show() {
+        stage.show();
+    }
+}
diff --git a/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/XmlSignDialog.java b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/XmlSignDialog.java
new file mode 100644
index 0000000..a67cd10
--- /dev/null
+++ b/modules/cybercore-ui/src/main/java/br/com/cybercore/signer/ui/view/XmlSignDialog.java
@@ -0,0 +1,513 @@
+package br.com.cybercore.signer.ui.view;
+
+import br.com.cybercore.signer.core.domain.CertificateType;
+import br.com.cybercore.signer.core.domain.ManagedCertificate;
+import br.com.cybercore.signer.core.provider.CertificateManager;
+import br.com.cybercore.signer.core.security.PinSessionManager;
+import br.com.cybercore.signer.core.xml.XmlSignatureOptions;
+import br.com.cybercore.signer.core.xml.XmlSigningService;
+import br.com.cybercore.signer.ui.components.SvgIcons;
+import br.com.cybercore.signer.ui.theme.ThemeManager;
+import javafx.collections.FXCollections;
+import javafx.concurrent.Task;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.Alert;
+import javafx.scene.control.Button;
+import javafx.scene.control.ButtonBar;
+import javafx.scene.control.ButtonType;
+import javafx.scene.control.CheckBox;
+import javafx.scene.control.ComboBox;
+import javafx.scene.control.Label;
+import javafx.scene.control.ListCell;
+import javafx.scene.control.PasswordField;
+import javafx.scene.control.ProgressIndicator;
+import javafx.scene.control.RadioButton;
+import javafx.scene.control.ScrollPane;
+import javafx.scene.control.TextField;
+import javafx.scene.control.ToggleGroup;
+import javafx.scene.layout.GridPane;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.VBox;
+import javafx.stage.FileChooser;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.awt.Desktop;
+import java.io.File;
+import java.nio.file.Files;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+
+/**
+ * Diálogo especializado para Assinatura Digital de Documentos XML segundo o padrão
+ * W3C XMLDSig e ICP-Brasil, com suporte a envelopes completos e elementos específicos (ex: infNFe).
+ */
+@SuppressWarnings("this-escape")
+public final class XmlSignDialog {
+
+    private static final Logger logger = LoggerFactory.getLogger(XmlSignDialog.class);
+
+    private final Stage stage;
+    private final CertificateManager certManager;
+    private final XmlSigningService xmlSigningService;
+
+    // Controles de Documento
+    private TextField txtSourceXml;
+    private File selectedSourceFile;
+
+    // Controles de Certificado
+    private ComboBox<ManagedCertificate> certCombo;
+    private PasswordField pinField;
+    private Label lblPinNotice;
+
+    // Controles de Modo de Assinatura
+    private RadioButton rbWholeDocument;
+    private RadioButton rbSpecificElement;
+    private TextField txtElementTag;
+    private TextField txtElementId;
+    private CheckBox chkValidateAfter;
+
+    // Controles de Ação e Feedback
+    private ProgressIndicator progressIndicator;
+    private Label lblStatus;
+    private Button btnSign;
+    private Button btnCancel;
+
+    public XmlSignDialog(Stage owner, CertificateManager certManager) {
+        this(owner, certManager, new XmlSigningService(certManager));
+    }
+
+    public XmlSignDialog(Stage owner, CertificateManager certManager, XmlSigningService xmlSigningService) {
+        this.certManager = Objects.requireNonNull(certManager, "CertificateManager não pode ser nulo.");
+        this.xmlSigningService = Objects.requireNonNull(xmlSigningService, "XmlSigningService não pode ser nulo.");
+
+        this.stage = new Stage();
+        this.stage.initModality(Modality.APPLICATION_MODAL);
+        if (owner != null) {
+            this.stage.initOwner(owner);
+        }
+        this.stage.setTitle("CyberCore Signer — Assinatura Digital de XML (XMLDSig)");
+        this.stage.setResizable(true);
+        this.stage.setMinWidth(720);
+        this.stage.setMinHeight(580);
+
+        initLayout();
+    }
+
+    private void initLayout() {
+        VBox root = new VBox(16);
+        root.setPadding(new Insets(20));
+        root.getStyleClass().add("dialog-container");
+
+        // Topo / Cabeçalho
+        HBox header = new HBox(14);
+        header.setAlignment(Pos.CENTER_LEFT);
+        VBox titleBox = new VBox(4);
+        Label lblTitle = new Label("ASSINATURA DE DOCUMENTO XML (XMLDSIG)");
+        lblTitle.getStyleClass().add("dialog-header");
+        Label lblSub = new Label("Assine digitalmente documentos XML no padrão W3C XMLDSig e ICP-Brasil (NF-e, CT-e, MDF-e, eSocial, etc.).");
+        lblSub.getStyleClass().add("dialog-subtitle");
+        titleBox.getChildren().addAll(lblTitle, lblSub);
+        header.getChildren().addAll(SvgIcons.xmlIcon(), titleBox);
+
+        // ScrollPane
+        ScrollPane scrollPane = new ScrollPane();
+        scrollPane.setFitToWidth(true);
+        scrollPane.setStyle("-fx-background-color: transparent; -fx-background: transparent; -fx-border-color: transparent;");
+
+        VBox formContent = new VBox(16);
+        formContent.setPadding(new Insets(4, 8, 4, 0));
+
+        // 1. Seção: Arquivo XML
+        VBox fileSection = new VBox(8);
+        fileSection.getStyleClass().add("dialog-box");
+        Label lblFileTitle = new Label("ARQUIVO XML A ASSINAR");
+        lblFileTitle.getStyleClass().add("dialog-field-title");
+
+        HBox fileRow = new HBox(10);
+        fileRow.setAlignment(Pos.CENTER_LEFT);
+        txtSourceXml = new TextField();
+        txtSourceXml.setPromptText("Selecione o arquivo XML original...");
+        txtSourceXml.setEditable(false);
+        HBox.setHgrow(txtSourceXml, Priority.ALWAYS);
+
+        Button btnBrowse = new Button("Procurar XML...");
+        btnBrowse.getStyleClass().add("btn-secondary");
+        btnBrowse.setOnAction(e -> handleBrowseSourceXml());
+        fileRow.getChildren().addAll(txtSourceXml, btnBrowse);
+        fileSection.getChildren().addAll(lblFileTitle, fileRow);
+
+        // 2. Seção: Certificado Digital
+        VBox certSection = new VBox(8);
+        certSection.getStyleClass().add("dialog-box");
+        Label lblCertTitle = new Label("CERTIFICADO DIGITAL ICP-BRASIL");
+        lblCertTitle.getStyleClass().add("dialog-field-title");
+
+        certCombo = new ComboBox<>();
+        certCombo.setMaxWidth(Double.MAX_VALUE);
+        populateCertificates();
+        certCombo.setOnAction(e -> updatePinFieldVisibility());
+
+        certCombo.setCellFactory(lv -> new ListCell<>() {
+            @Override
+            protected void updateItem(ManagedCertificate item, boolean empty) {
+                super.updateItem(item, empty);
+                if (empty || item == null) {
+                    setText(null);
+                } else {
+                    String doc = item.cpf() != null ? " [CPF: " + item.cpf() + "]" : (item.cnpj() != null ? " [CNPJ: " + item.cnpj() + "]" : "");
+                    setText(item.commonName() + doc + " (" + item.type() + ")");
+                }
+            }
+        });
+        certCombo.setButtonCell(new ListCell<>() {
+            @Override
+            protected void updateItem(ManagedCertificate item, boolean empty) {
+                super.updateItem(item, empty);
+                if (empty || item == null) {
+                    setText(null);
+                } else {
+                    String doc = item.cpf() != null ? " [CPF: " + item.cpf() + "]" : (item.cnpj() != null ? " [CNPJ: " + item.cnpj() + "]" : "");
+                    setText(item.commonName() + doc + " (" + item.type() + ")");
+                }
+            }
+        });
+
+        HBox pinRow = new HBox(12);
+        pinRow.setAlignment(Pos.CENTER_LEFT);
+        Label lblPin = new Label("PIN / Senha:");
+        lblPin.getStyleClass().add("dialog-field-title");
+        pinField = new PasswordField();
+        pinField.setPromptText("Digite o PIN ou senha da chave privada...");
+        pinField.setPrefWidth(260);
+
+        lblPinNotice = new Label();
+        lblPinNotice.setStyle("-fx-font-size: 11px;");
+        pinRow.getChildren().addAll(lblPin, pinField, lblPinNotice);
+
+        certSection.getChildren().addAll(lblCertTitle, certCombo, pinRow);
+
+        // 3. Seção: Modo de Assinatura XMLDSig
+        VBox xmlModeSection = new VBox(12);
+        xmlModeSection.getStyleClass().add("dialog-box");
+        Label lblModeTitle = new Label("MODO DE ASSINATURA XMLDSIG");
+        lblModeTitle.getStyleClass().add("dialog-field-title");
+
+        ToggleGroup modeGroup = new ToggleGroup();
+        rbWholeDocument = new RadioButton("Documento Completo (Enveloped W3C / URI=\"\")");
+        rbWholeDocument.setToggleGroup(modeGroup);
+        rbWholeDocument.setSelected(true);
+
+        rbSpecificElement = new RadioButton("Elemento Específico por Tag / ID (Padrão NF-e, CT-e, MDF-e, etc.)");
+        rbSpecificElement.setToggleGroup(modeGroup);
+
+        VBox elementConfigBox = new VBox(10);
+        elementConfigBox.setPadding(new Insets(6, 0, 0, 24));
+
+        GridPane elementGrid = new GridPane();
+        elementGrid.setHgap(12);
+        elementGrid.setVgap(8);
+
+        Label lblTag = new Label("Tag do Elemento:");
+        lblTag.getStyleClass().add("dialog-field-title");
+        txtElementTag = new TextField("infNFe");
+        txtElementTag.setPromptText("Ex: infNFe, infCte, infMDFe, SignedInfo");
+
+        Label lblId = new Label("Atributo Id (opcional):");
+        lblId.getStyleClass().add("dialog-field-title");
+        txtElementId = new TextField();
+        txtElementId.setPromptText("Deixe vazio para autodetectar o Id da tag");
+
+        elementGrid.add(lblTag, 0, 0);
+        elementGrid.add(txtElementTag, 1, 0);
+        elementGrid.add(lblId, 0, 1);
+        elementGrid.add(txtElementId, 1, 1);
+
+        elementConfigBox.getChildren().add(elementGrid);
+        elementConfigBox.disableProperty().bind(rbWholeDocument.selectedProperty());
+
+        chkValidateAfter = new CheckBox("Validar conformidade e integridade criptográfica após gravação");
+        chkValidateAfter.setSelected(true);
+
+        xmlModeSection.getChildren().addAll(lblModeTitle, rbWholeDocument, rbSpecificElement, elementConfigBox, chkValidateAfter);
+
+        formContent.getChildren().addAll(fileSection, certSection, xmlModeSection);
+        scrollPane.setContent(formContent);
+        VBox.setVgrow(scrollPane, Priority.ALWAYS);
+
+        // Rodapé com Ações
+        HBox footer = new HBox(12);
+        footer.setAlignment(Pos.CENTER_RIGHT);
+
+        progressIndicator = new ProgressIndicator();
+        progressIndicator.setPrefSize(22, 22);
+        progressIndicator.setVisible(false);
+
+        lblStatus = new Label();
+        lblStatus.setStyle("-fx-font-size: 12px;");
+        HBox.setHgrow(lblStatus, Priority.ALWAYS);
+
+        btnCancel = new Button("Cancelar");
+        btnCancel.getStyleClass().add("btn-secondary");
+        btnCancel.setOnAction(e -> stage.close());
+
+        btnSign = new Button("Assinar Documento XML");
+        btnSign.getStyleClass().add("btn-primary");
+        btnSign.setDefaultButton(true);
+        btnSign.setOnAction(e -> executeXmlSignature());
+
+        footer.getChildren().addAll(progressIndicator, lblStatus, btnCancel, btnSign);
+
+        root.getChildren().addAll(header, scrollPane, footer);
+
+        Scene scene = new Scene(root);
+        ThemeManager.applyTheme(scene);
+        stage.setScene(scene);
+
+        updatePinFieldVisibility();
+    }
+
+    private void populateCertificates() {
+        try {
+            List<ManagedCertificate> certs = certManager.getAvailableCertificates();
+            certCombo.setItems(FXCollections.observableArrayList(certs));
+            if (!certs.isEmpty()) {
+                certCombo.setValue(certs.get(0));
+            }
+        } catch (Exception e) {
+            logger.error("Erro ao listar certificados para assinatura de XML", e);
+        }
+    }
+
+    private void updatePinFieldVisibility() {
+        ManagedCertificate cert = certCombo.getValue();
+        if (cert == null) {
+            pinField.setDisable(true);
+            lblPinNotice.setText("");
+            return;
+        }
+
+        boolean isA3 = cert.type() == CertificateType.A3;
+        boolean hasPinInSession = isA3 && PinSessionManager.getInstance().hasPin(cert.id());
+
+        if (hasPinInSession) {
+            pinField.setDisable(true);
+            pinField.clear();
+            lblPinNotice.setText("✓ PIN memorizado na sessão segura");
+            lblPinNotice.setStyle("-fx-text-fill: #10b981; -fx-font-weight: bold;");
+        } else if (isA3 && "provider-win-store".equalsIgnoreCase(cert.providerId())) {
+            pinField.setDisable(true);
+            pinField.clear();
+            lblPinNotice.setText("Autenticação nativa pelo Windows/Driver");
+            lblPinNotice.setStyle("-fx-text-fill: -fx-accent;");
+        } else {
+            pinField.setDisable(false);
+            lblPinNotice.setText(isA3 ? "Requer PIN do Smart Card" : "Requer senha do certificado A1");
+            lblPinNotice.setStyle("-fx-text-fill: -fx-text-secondary;");
+        }
+    }
+
+    private void handleBrowseSourceXml() {
+        FileChooser chooser = new FileChooser();
+        chooser.setTitle("Selecionar Documento XML");
+        chooser.getExtensionFilters().add(new FileChooser.ExtensionFilter("Documentos XML (*.xml)", "*.xml"));
+
+        File file = chooser.showOpenDialog(stage);
+        if (file != null) {
+            selectedSourceFile = file;
+            txtSourceXml.setText(file.getAbsolutePath());
+
+            // Tenta detectar automaticamente se é uma NF-e, CT-e, etc.
+            try {
+                String content = Files.readString(file.toPath());
+                if (content.contains("<infNFe")) {
+                    rbSpecificElement.setSelected(true);
+                    txtElementTag.setText("infNFe");
+                } else if (content.contains("<infCte")) {
+                    rbSpecificElement.setSelected(true);
+                    txtElementTag.setText("infCte");
+                } else if (content.contains("<infMDFe")) {
+                    rbSpecificElement.setSelected(true);
+                    txtElementTag.setText("infMDFe");
+                }
+            } catch (Exception ignored) {
+            }
+        }
+    }
+
+    private void executeXmlSignature() {
+        if (selectedSourceFile == null || !selectedSourceFile.exists()) {
+            showAlert(Alert.AlertType.WARNING, "Documento Não Selecionado", "Por favor, selecione um arquivo XML válido para assinar.");
+            return;
+        }
+
+        ManagedCertificate cert = certCombo.getValue();
+        if (cert == null) {
+            showAlert(Alert.AlertType.WARNING, "Certificado Não Selecionado", "Por favor, selecione um certificado digital.");
+            return;
+        }
+
+        FileChooser chooser = new FileChooser();
+        chooser.setTitle("Salvar XML Assinado Como...");
+        chooser.getExtensionFilters().add(new FileChooser.ExtensionFilter("Documentos XML (*.xml)", "*.xml"));
+
+        String originalName = selectedSourceFile.getName();
+        String baseName = originalName.toLowerCase().endsWith(".xml")
+                ? originalName.substring(0, originalName.length() - 4)
+                : originalName;
+        chooser.setInitialFileName(baseName + "_assinado.xml");
+        if (selectedSourceFile.getParentFile() != null && selectedSourceFile.getParentFile().exists()) {
+            chooser.setInitialDirectory(selectedSourceFile.getParentFile());
+        }
+
+        File targetFile = chooser.showSaveDialog(stage);
+        if (targetFile == null) {
+            return;
+        }
+
+        char[] pin = null;
+        if (!pinField.isDisable() && !pinField.getText().isEmpty()) {
+            pin = pinField.getText().toCharArray();
+        }
+
+        XmlSignatureOptions options;
+        if (rbSpecificElement.isSelected()) {
+            String tag = txtElementTag.getText().trim();
+            String id = txtElementId.getText().trim();
+            if (tag.isBlank()) {
+                tag = "infNFe";
+            }
+            options = XmlSignatureOptions.forElement(cert.id(), pin, tag, id.isBlank() ? null : id);
+        } else {
+            options = XmlSignatureOptions.wholeDocument(cert.id(), pin);
+        }
+
+        setFormDisabled(true);
+        progressIndicator.setVisible(true);
+        lblStatus.setText("Assinando documento XML (XMLDSig)...");
+        lblStatus.setStyle("-fx-text-fill: -fx-accent;");
+
+        boolean validate = chkValidateAfter.isSelected();
+
+        Task<File> signTask = new Task<>() {
+            @Override
+            protected File call() throws Exception {
+                xmlSigningService.signXmlFile(selectedSourceFile, targetFile, options);
+
+                if (validate) {
+                    byte[] signedBytes = Files.readAllBytes(targetFile.toPath());
+                    boolean valid = xmlSigningService.validateXmlSignature(signedBytes);
+                    if (!valid) {
+                        throw new IllegalStateException("A assinatura foi gravada, mas a validação de integridade do XML falhou.");
+                    }
+                }
+                return targetFile;
+            }
+        };
+
+        signTask.setOnSucceeded(e -> {
+            setFormDisabled(false);
+            progressIndicator.setVisible(false);
+            lblStatus.setText("✓ Documento XML assinado e validado com sucesso!");
+            lblStatus.setStyle("-fx-text-fill: #10b981; -fx-font-weight: bold;");
+
+            showSuccessDialog(targetFile);
+        });
+
+        signTask.setOnFailed(e -> {
+            setFormDisabled(false);
+            progressIndicator.setVisible(false);
+            Throwable ex = signTask.getException();
+            logger.error("Falha ao assinar XML", ex);
+            lblStatus.setText("✕ Falha na assinatura");
+            lblStatus.setStyle("-fx-text-fill: #ef4444; -fx-font-weight: bold;");
+
+            showAlert(Alert.AlertType.ERROR, "Erro na Assinatura do XML",
+                    "Não foi possível concluir a assinatura XMLDSig:\n" + (ex != null ? ex.getMessage() : "Erro desconhecido"));
+        });
+
+        Thread signThread = new Thread(signTask, "cybercore-xml-signer");
+        signThread.setDaemon(true);
+        signThread.start();
+    }
+
+    private void showSuccessDialog(File targetFile) {
+        Alert alert = new Alert(Alert.AlertType.INFORMATION);
+        alert.setTitle("Assinatura Concluída");
+        alert.setHeaderText("XML Assinado com Sucesso!");
+        alert.setContentText("O documento XML foi digitalmente assinado no padrão W3C XMLDSig ICP-Brasil.\n\n"
+                + "Arquivo gerado:\n" + targetFile.getAbsolutePath());
+
+        ButtonType btnOpen = new ButtonType("Abrir XML");
+        ButtonType btnFolder = new ButtonType("Abrir Pasta");
+        ButtonType btnClose = new ButtonType("Fechar", ButtonBar.ButtonData.CANCEL_CLOSE);
+
+        alert.getButtonTypes().setAll(btnOpen, btnFolder, btnClose);
+        ThemeManager.applyTheme(alert.getDialogPane().getScene());
+
+        Optional<ButtonType> result = alert.showAndWait();
+        if (result.isPresent()) {
+            if (result.get() == btnOpen) {
+                openFile(targetFile);
+            } else if (result.get() == btnFolder) {
+                openFolder(targetFile);
+            }
+        }
+    }
+
+    private void openFile(File file) {
+        try {
+            if (Desktop.isDesktopSupported() && Desktop.getDesktop().isSupported(Desktop.Action.OPEN)) {
+                Desktop.getDesktop().open(file);
+            }
+        } catch (Exception ex) {
+            logger.warn("Não foi possível abrir o arquivo automaticamente: {}", ex.getMessage());
+        }
+    }
+
+    private void openFolder(File file) {
+        try {
+            if (Desktop.isDesktopSupported() && Desktop.getDesktop().isSupported(Desktop.Action.OPEN)) {
+                File parent = file.getParentFile();
+                if (parent != null) {
+                    Desktop.getDesktop().open(parent);
+                }
+            }
+        } catch (Exception ex) {
+            logger.warn("Não foi possível abrir a pasta do arquivo: {}", ex.getMessage());
+        }
+    }
+
+    private void setFormDisabled(boolean disabled) {
+        btnSign.setDisable(disabled);
+        btnCancel.setDisable(disabled);
+        certCombo.setDisable(disabled);
+        pinField.setDisable(disabled);
+        rbWholeDocument.setDisable(disabled);
+        rbSpecificElement.setDisable(disabled);
+        txtElementTag.setDisable(disabled);
+        txtElementId.setDisable(disabled);
+        chkValidateAfter.setDisable(disabled);
+    }
+
+    private void showAlert(Alert.AlertType type, String title, String message) {
+        Alert alert = new Alert(type);
+        alert.setTitle(title);
+        alert.setHeaderText(null);
+        alert.setContentText(message);
+        ThemeManager.applyTheme(alert.getDialogPane().getScene());
+        alert.showAndWait();
+    }
+
+    public void show() {
+        stage.centerOnScreen();
+        stage.show();
+        stage.toFront();
+    }
+}
diff --git a/modules/cybercore-ui/src/main/resources/assets/README.md b/modules/cybercore-ui/src/main/resources/assets/README.md
new file mode 100644
index 0000000..d77f68b
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/README.md
@@ -0,0 +1,75 @@
+# Pasta de Ícones (SVG) e Imagens (PNG) — CyberCore Signer
+
+Esta pasta é o repositório oficial onde você pode visualizar, customizar e substituir livremente os **ícones em SVG** e as **imagens em PNG** do **CyberCore Signer**.
+
+---
+
+## 📁 Estrutura de Arquivos Criados
+
+```
+assets/
+├── icons/                     # Ícones vetoriais SVG reais e editáveis (W3C padrão)
+│   ├── pdf.svg                # Ícone Assinar PDF (documento com tag vermelha PDF)
+│   ├── xml.svg                # Ícone Assinar XML (documento com tag azul <XML>)
+│   ├── file.svg               # Ícone Assinar Arquivo (documento com caneta)
+│   ├── batch.svg              # Ícone Assinatura em Lote (pilha de documentos com check)
+│   ├── attached.svg           # Ícone Assinatura Atachada (documento com clipe de papel)
+│   ├── co-sign.svg            # Ícone Co-Assinar (documentos duplos com usuários)
+│   ├── timestamp.svg          # Ícone Carimbo do Tempo (documento com relógio TSA)
+│   ├── ltv.svg                # Ícone Assinatura LTV (documento com selo perpétuo)
+│   ├── validate.svg           # Ícone Validar Assinatura (documento com checkmark verde)
+│   ├── validate-timestamp.svg # Ícone Validar Carimbo (relógio com checkmark verde)
+│   ├── exit.svg               # Ícone Sair do Agente (porta com seta vermelha de saída)
+│   ├── logs.svg               # Ícone Terminal de Logs (janela com prompt </>)
+│   ├── settings.svg           # Ícone Configurações (engrenagem de precisão de 8 dentes)
+│   ├── tutorial.svg           # Ícone Tutorial e Ajuda (monitor com vídeo/play)
+│   ├── cert.svg               # Ícone Certificados Digitais (pasta com cadeado seguro)
+│   ├── about.svg              # Ícone Sobre o Sistema (círculo azul com 'i')
+│   ├── sun.svg                # Ícone Tema Claro (sol dourado com raios vetoriais)
+│   ├── moon.svg               # Ícone Tema Escuro (lua crescente azul/índigo)
+│   ├── shield.svg             # Ícone Brasão de Segurança (CyberShield com chave interna)
+│   ├── seal.svg               # Ícone Designer e Gerenciador de Selos Notariais
+│   ├── check.svg              # Ícone Checkmark de sucesso e validação
+│   ├── error.svg              # Ícone de Erro / Alerta em vermelho
+│   └── star.svg               # Ícone de Estrela notarial / favorita
+│
+└── images/                    # Imagens de alta fidelidade em PNG com canal alfa (transparência)
+    ├── app-icon.png           # Ícone oficial do app (256x256 px - Diamante 3D azul Serpro)
+    ├── app-logo.png           # Logotipo horizontal oficial (480x120 px - CyberCore SIGNER)
+    ├── brand-banner.png       # Banner de cabeçalho e marca (600x160 px - Serpro Blue)
+    └── default-seal.png       # Selo de assinatura padrão ICP-Brasil (640x164 px)
+```
+
+---
+
+## 🎨 Como Customizar Qualquer Ícone ou Imagem
+
+1. **Ícones:** 
+   - Estão no formato `.svg` padrão.
+   - Podem ser editados diretamente no seu editor de código (VS Code, etc.) ou em editores vetoriais como **Inkscape, Figma ou Illustrator**.
+   - Se preferir colocar uma imagem bitmap para um ícone específico, você também pode colocar um `.png` (ex: `pdf.png`). O sistema prioriza `.svg` e aceita `.png` com fallback transparente.
+
+2. **Imagens do Sistema:**
+   - Estão no formato `.png` com canal alfa de 32 bits (fundo transparente).
+   - Você pode substituir `app-logo.png`, `app-icon.png`, `brand-banner.png` ou `default-seal.png` pelo logotipo e identidade visual da sua instituição ou empresa.
+
+3. **Ordem de Prioridade e Hot-Reloading:**
+   Quando a aplicação busca um ícone ou imagem, a resolução ocorre na ordem:
+   1. **Pasta Física Local (`./assets/icons/` e `./assets/images/`)**: Qualquer alteração feita aqui entra em vigor imediatamente ao abrir a janela ou reiniciar a aplicação, sem necessidade de recompilar!
+   2. **Pasta do Usuário (`~/.cybercore/assets/`)**: Configurações específicas por usuário do sistema operacional.
+   3. **Resources Empacotados no JAR (`/assets/`)**: Cópia empacotada internamente no `.jar`.
+   4. **Fallback Vetorial Nativo (`SvgIcons`)**: Garantia de que a interface nunca fique em branco caso algum arquivo seja excluído.
+
+---
+
+## 🚀 Como Testar Suas Modificações
+
+Para compilar e gerar o pacote `.jar` completo com todos os novos assets embutidos:
+```bash
+./build-jar.sh
+```
+
+Para rodar a aplicação:
+```bash
+java -jar ./cybercore-signer.jar
+```
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/about.svg b/modules/cybercore-ui/src/main/resources/assets/icons/about.svg
new file mode 100644
index 0000000..dd4abb9
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/about.svg
@@ -0,0 +1,5 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <circle cx="24" cy="24" r="20" fill="#0288d1"/>
+  <circle cx="24" cy="14" r="3" fill="#ffffff"/>
+  <line x1="24" y1="21" x2="24" y2="34" stroke="#ffffff" stroke-width="4.5" stroke-linecap="round"/>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/attached.svg b/modules/cybercore-ui/src/main/resources/assets/icons/attached.svg
new file mode 100644
index 0000000..7d894e7
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/attached.svg
@@ -0,0 +1,12 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Folha de documento com dobra -->
+  <path d="M 10 4 L 34 4 L 42 12 L 42 44 L 10 44 Z" fill="#ffffff" stroke="#0288d1" stroke-width="2.5" stroke-linejoin="round"/>
+  <path d="M 34 4 L 34 12 L 42 12 Z" fill="#b3e5fc" stroke="#0288d1" stroke-width="2"/>
+  <!-- Linhas de texto representativas -->
+  <line x1="16" y1="20" x2="36" y2="20" stroke="#90caf9" stroke-width="2" stroke-linecap="round"/>
+  <line x1="16" y1="26" x2="36" y2="26" stroke="#90caf9" stroke-width="2" stroke-linecap="round"/>
+  <line x1="16" y1="32" x2="30" y2="32" stroke="#90caf9" stroke-width="2" stroke-linecap="round"/>
+  <!-- Clipe de papel metálico prendendo a folha -->
+  <path d="M 12 2 C 8 2 6 5 6 9 L 6 25 C 6 29 9 32 14 32 C 18 32 21 29 21 25 L 21 11 C 21 8 19 6 16 6 C 13 6 12 8 12 11 L 12 24"
+        fill="none" stroke="#455a64" stroke-width="2.8" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/batch.svg b/modules/cybercore-ui/src/main/resources/assets/icons/batch.svg
new file mode 100644
index 0000000..5ced311
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/batch.svg
@@ -0,0 +1,13 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Folha traseira (3) -->
+  <path d="M 16 4 L 38 4 L 44 10 L 44 32 L 16 32 Z" fill="#e1f5fe" stroke="#4fc3f7" stroke-width="2" stroke-linejoin="round"/>
+  <!-- Folha do meio (2) -->
+  <path d="M 10 10 L 32 10 L 38 16 L 38 38 L 10 38 Z" fill="#b3e5fc" stroke="#0288d1" stroke-width="2" stroke-linejoin="round"/>
+  <!-- Folha frontal (1) -->
+  <path d="M 4 16 L 26 16 L 32 22 L 32 44 L 4 44 Z" fill="#ffffff" stroke="#01579b" stroke-width="2.2" stroke-linejoin="round"/>
+  <!-- Dobra folha frontal -->
+  <path d="M 26 16 L 26 22 L 32 22 Z" fill="#e1f5fe" stroke="#01579b" stroke-width="1.8"/>
+  <!-- Checkmark de execução/lote concluído -->
+  <circle cx="34" cy="34" r="10" fill="#00c853"/>
+  <path d="M 29 34 L 33 38 L 39 30" fill="none" stroke="#ffffff" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/cert.svg b/modules/cybercore-ui/src/main/resources/assets/icons/cert.svg
new file mode 100644
index 0000000..14cc2b4
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/cert.svg
@@ -0,0 +1,11 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Pasta de arquivos de certificados -->
+  <path d="M 4 10 L 16 10 L 20 14 L 44 14 L 44 40 L 4 40 Z" fill="#e1f5fe" stroke="#0288d1" stroke-width="2.5" stroke-linejoin="round"/>
+  <!-- Aba superior da pasta -->
+  <path d="M 4 18 L 44 18" stroke="#0288d1" stroke-width="2"/>
+  <!-- Cadeado de segurança dourado/azul -->
+  <rect x="26" y="24" width="14" height="12" rx="3" fill="#0288d1"/>
+  <!-- Arco do cadeado -->
+  <path d="M 29 24 L 29 20 C 29 17 31 15 33 15 C 35 15 37 17 37 20 L 37 24" fill="none" stroke="#01579b" stroke-width="2.5"/>
+  <circle cx="33" cy="30" r="1.8" fill="#ffffff"/>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/check.svg b/modules/cybercore-ui/src/main/resources/assets/icons/check.svg
new file mode 100644
index 0000000..c379af0
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/check.svg
@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <circle cx="24" cy="24" r="20" fill="#10b981"/>
+  <path d="M 14 24 L 21 31 L 34 17" fill="none" stroke="#ffffff" stroke-width="4.5" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/co-sign.svg b/modules/cybercore-ui/src/main/resources/assets/icons/co-sign.svg
new file mode 100644
index 0000000..283c24f
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/co-sign.svg
@@ -0,0 +1,12 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Folha secundária -->
+  <path d="M 6 10 L 26 10 L 32 16 L 32 40 L 6 40 Z" fill="#ffffff" stroke="#1976d2" stroke-width="2.2" stroke-linejoin="round"/>
+  <!-- Folha primária -->
+  <path d="M 16 4 L 36 4 L 42 10 L 42 34 L 16 34 Z" fill="#e3f2fd" stroke="#0288d1" stroke-width="2.2" stroke-linejoin="round"/>
+  <path d="M 36 4 L 36 10 L 42 10 Z" fill="#bbdefb" stroke="#0288d1" stroke-width="1.8"/>
+  <!-- Ícone de dois usuários / parceiros de assinatura -->
+  <circle cx="16" cy="24" r="4" fill="#0d47a1"/>
+  <path d="M 10 36 C 10 31 13 30 16 30 C 19 30 22 31 22 36 Z" fill="#0d47a1"/>
+  <circle cx="26" cy="22" r="3.5" fill="#0288d1"/>
+  <path d="M 21 34 C 21 30 24 29 26 29 C 29 29 32 30 32 34 Z" fill="#0288d1"/>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/error.svg b/modules/cybercore-ui/src/main/resources/assets/icons/error.svg
new file mode 100644
index 0000000..5a36ff3
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/error.svg
@@ -0,0 +1,5 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <circle cx="24" cy="24" r="20" fill="#ef4444"/>
+  <line x1="16" y1="16" x2="32" y2="32" stroke="#ffffff" stroke-width="4.5" stroke-linecap="round"/>
+  <line x1="32" y1="16" x2="16" y2="32" stroke="#ffffff" stroke-width="4.5" stroke-linecap="round"/>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/exit.svg b/modules/cybercore-ui/src/main/resources/assets/icons/exit.svg
new file mode 100644
index 0000000..d209a6b
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/exit.svg
@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Porta de saída / batente -->
+  <path d="M 24 8 L 12 8 C 9.8 8 8 9.8 8 12 L 8 36 C 8 38.2 9.8 40 12 40 L 24 40" 
+        fill="none" stroke="#546e7a" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"/>
+  <!-- Seta vermelha apontando para fora -->
+  <line x1="18" y1="24" x2="40" y2="24" stroke="#d32f2f" stroke-width="3.2" stroke-linecap="round"/>
+  <polyline points="32 16, 40 24, 32 32" fill="none" stroke="#d32f2f" stroke-width="3.2" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/file.svg b/modules/cybercore-ui/src/main/resources/assets/icons/file.svg
new file mode 100644
index 0000000..023885f
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/file.svg
@@ -0,0 +1,13 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Folha de documento com dobra -->
+  <path d="M 8 4 L 32 4 L 42 14 L 42 44 L 8 44 Z" fill="#ffffff" stroke="#0288d1" stroke-width="2.5" stroke-linejoin="round"/>
+  <!-- Dobra de canto -->
+  <path d="M 32 4 L 32 14 L 42 14 Z" fill="#b3e5fc" stroke="#0288d1" stroke-width="2" stroke-linejoin="round"/>
+  <!-- Linhas de texto representativas -->
+  <line x1="14" y1="20" x2="34" y2="20" stroke="#cfd8dc" stroke-width="2" stroke-linecap="round"/>
+  <line x1="14" y1="26" x2="34" y2="26" stroke="#cfd8dc" stroke-width="2" stroke-linecap="round"/>
+  <!-- Caneta / Pena de assinatura eletrônica -->
+  <path d="M 16 38 L 30 24 L 35 29 L 21 43 L 14 44 Z" fill="#0288d1"/>
+  <path d="M 30 24 L 34 20 L 39 25 L 35 29 Z" fill="#01579b"/>
+  <circle cx="16" cy="42" r="1.5" fill="#ffffff"/>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/logs.svg b/modules/cybercore-ui/src/main/resources/assets/icons/logs.svg
new file mode 100644
index 0000000..0dd89e3
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/logs.svg
@@ -0,0 +1,13 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Janela de terminal / console -->
+  <rect x="4" y="6" width="40" height="36" rx="6" fill="#1e293b" stroke="#334155" stroke-width="2"/>
+  <!-- Barra de título do terminal com botões -->
+  <circle cx="10" cy="12" r="2" fill="#ef4444"/>
+  <circle cx="16" cy="12" r="2" fill="#f59e0b"/>
+  <circle cx="22" cy="12" r="2" fill="#10b981"/>
+  <!-- Linha divisória -->
+  <line x1="4" y1="18" x2="44" y2="18" stroke="#334155" stroke-width="1.5"/>
+  <!-- Texto e prompt de código </> -->
+  <path d="M 12 24 L 18 29 L 12 34" fill="none" stroke="#38bdf8" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"/>
+  <line x1="22" y1="34" x2="32" y2="34" stroke="#94a3b8" stroke-width="2.5" stroke-linecap="round"/>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/ltv.svg b/modules/cybercore-ui/src/main/resources/assets/icons/ltv.svg
new file mode 100644
index 0000000..dbc162a
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/ltv.svg
@@ -0,0 +1,11 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Folha de documento com dobra -->
+  <path d="M 8 4 L 30 4 L 38 12 L 38 34 L 8 34 Z" fill="#ffffff" stroke="#00838f" stroke-width="2.5" stroke-linejoin="round"/>
+  <path d="M 30 4 L 30 12 L 38 12 Z" fill="#b2dfdb" stroke="#00838f" stroke-width="2"/>
+  <!-- Linhas no documento -->
+  <line x1="14" y1="18" x2="30" y2="18" stroke="#cfd8dc" stroke-width="2" stroke-linecap="round"/>
+  <line x1="14" y1="24" x2="24" y2="24" stroke="#cfd8dc" stroke-width="2" stroke-linecap="round"/>
+  <!-- Selo LTV com fita de proteção permanente -->
+  <circle cx="32" cy="32" r="12" fill="#e0f2f1" stroke="#00897b" stroke-width="2.5"/>
+  <text x="32" y="36.5" font-family="Segoe UI, Arial, sans-serif" font-size="9" font-weight="bold" fill="#00695c" text-anchor="middle">LTV</text>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/moon.svg b/modules/cybercore-ui/src/main/resources/assets/icons/moon.svg
new file mode 100644
index 0000000..fd47105
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/moon.svg
@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Lua crescente ciano/índigo -->
+  <path d="M 40 26.5 A 18 18 0 1 1 21.5 8 A 14 14 0 0 0 40 26.5 Z" fill="#38bdf8"/>
+  <circle cx="36" cy="12" r="1.5" fill="#818cf8"/>
+  <circle cx="42" cy="18" r="1" fill="#818cf8"/>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/pdf.svg b/modules/cybercore-ui/src/main/resources/assets/icons/pdf.svg
new file mode 100644
index 0000000..3755ded
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/pdf.svg
@@ -0,0 +1,13 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Folha de documento com dobra -->
+  <path d="M 8 4 L 32 4 L 42 14 L 42 44 L 8 44 Z" fill="#ffffff" stroke="#d32f2f" stroke-width="2.5" stroke-linejoin="round"/>
+  <!-- Dobra de canto -->
+  <path d="M 32 4 L 32 14 L 42 14 Z" fill="#ffcdd2" stroke="#d32f2f" stroke-width="2" stroke-linejoin="round"/>
+  <!-- Linhas de texto representativas -->
+  <line x1="14" y1="20" x2="28" y2="20" stroke="#b0bec5" stroke-width="2" stroke-linecap="round"/>
+  <line x1="14" y1="25" x2="36" y2="25" stroke="#b0bec5" stroke-width="2" stroke-linecap="round"/>
+  <line x1="14" y1="30" x2="36" y2="30" stroke="#b0bec5" stroke-width="2" stroke-linecap="round"/>
+  <!-- Etiqueta vermelha com sigla PDF -->
+  <rect x="12" y="33" width="24" height="11" rx="3" fill="#e53935"/>
+  <text x="24" y="41.5" font-family="Segoe UI, Arial, sans-serif" font-size="8.5" font-weight="bold" fill="#ffffff" text-anchor="middle">PDF</text>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/seal.svg b/modules/cybercore-ui/src/main/resources/assets/icons/seal.svg
new file mode 100644
index 0000000..1aa3a5f
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/seal.svg
@@ -0,0 +1,11 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Fita pendente do selo -->
+  <polygon points="18,30 24,44 30,30" fill="#f59e0b"/>
+  <polygon points="12,30 16,42 20,30" fill="#d97706"/>
+  <polygon points="28,30 32,42 36,30" fill="#d97706"/>
+  <!-- Medalha / Selo circular -->
+  <circle cx="24" cy="20" r="16" fill="#d97706" stroke="#fbbf24" stroke-width="2.5"/>
+  <circle cx="24" cy="20" r="13" fill="none" stroke="#fbbf24" stroke-width="1.2" stroke-dasharray="2,2"/>
+  <!-- Estrela de 5 pontas central -->
+  <polygon points="24,9 26.5,16.5 34,16.5 28,21 30.5,28.5 24,24 17.5,28.5 20,21 14,16.5 21.5,16.5" fill="#ffffff"/>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/settings.svg b/modules/cybercore-ui/src/main/resources/assets/icons/settings.svg
new file mode 100644
index 0000000..e0f4042
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/settings.svg
@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Engrenagem simétrica de 8 dentes centrada em (24, 24) -->
+  <path d="M 21 4 L 27 4 L 28 10 C 30 10.8 31.8 11.8 33.4 13.2 L 39 10 L 43 14 L 39.8 19.6 C 41.2 21.2 42.2 23 43 25 L 49 26 L 49 32 L 43 33 C 42.2 35 41.2 36.8 39.8 38.4 L 43 44 L 39 48 L 33.4 44.8 C 31.8 46.2 30 47.2 28 48 L 27 54 L 21 54 L 20 48 C 18 47.2 16.2 46.2 14.6 44.8 L 9 48 L 5 44 L 8.2 38.4 C 6.8 36.8 5.8 35 5 33 L -1 32 L -1 26 L 5 25 C 5.8 23 6.8 21.2 8.2 19.6 L 5 14 L 9 10 L 14.6 13.2 C 16.2 11.8 18 10.8 20 10 Z" transform="scale(0.8) translate(6, 4)" fill="#0288d1"/>
+  <!-- Círculo externo da engrenagem -->
+  <circle cx="24" cy="24" r="14" fill="#0288d1"/>
+  <!-- Furo central vazado -->
+  <circle cx="24" cy="24" r="6" fill="#ffffff"/>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/shield.svg b/modules/cybercore-ui/src/main/resources/assets/icons/shield.svg
new file mode 100644
index 0000000..1bc2539
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/shield.svg
@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Escudo CyberShield -->
+  <path d="M 24 4 L 8 11 L 8 24 C 8 34.5 15 42.5 24 45 C 33 42.5 40 34.5 40 24 L 40 11 Z" fill="#0284c7" stroke="#38bdf8" stroke-width="2.5" stroke-linejoin="round"/>
+  <!-- Chave de segurança criptográfica no centro -->
+  <path d="M 24 14 C 20.7 14 18 16.7 18 20 C 18 22.4 19.5 24.5 22 25.4 L 22 34 L 26 34 L 26 30 L 28 30 L 28 27 L 26 27 L 26 25.4 C 28.5 24.5 30 22.4 30 20 C 30 16.7 27.3 14 24 14 Z M 24 18 C 25.1 18 26 18.9 26 20 C 26 21.1 25.1 22 24 22 C 22.9 22 22 21.1 22 20 C 22 18.9 22.9 18 24 18 Z" fill="#ffffff"/>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/star.svg b/modules/cybercore-ui/src/main/resources/assets/icons/star.svg
new file mode 100644
index 0000000..ac2213a
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/star.svg
@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <polygon points="24,4 29.5,16.5 43,17.5 32.5,26.5 35.8,40 24,32.5 12.2,40 15.5,26.5 5,17.5 18.5,16.5" 
+           fill="#f59e0b" stroke="#d97706" stroke-width="2" stroke-linejoin="round"/>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/sun.svg b/modules/cybercore-ui/src/main/resources/assets/icons/sun.svg
new file mode 100644
index 0000000..0327476
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/sun.svg
@@ -0,0 +1,15 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Núcleo solar brilhante -->
+  <circle cx="24" cy="24" r="10" fill="#f59e0b"/>
+  <!-- Raios solares -->
+  <g stroke="#f59e0b" stroke-width="3" stroke-linecap="round">
+    <line x1="24" y1="4" x2="24" y2="9"/>
+    <line x1="24" y1="39" x2="24" y2="44"/>
+    <line x1="4" y1="24" x2="9" y2="24"/>
+    <line x1="39" y1="24" x2="44" y2="24"/>
+    <line x1="9.8" y1="9.8" x2="13.3" y2="13.3"/>
+    <line x1="34.7" y1="34.7" x2="38.2" y2="38.2"/>
+    <line x1="9.8" y1="38.2" x2="13.3" y2="34.7"/>
+    <line x1="34.7" y1="13.3" x2="38.2" y2="9.8"/>
+  </g>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/timestamp.svg b/modules/cybercore-ui/src/main/resources/assets/icons/timestamp.svg
new file mode 100644
index 0000000..16238f4
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/timestamp.svg
@@ -0,0 +1,13 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Folha de documento com dobra -->
+  <path d="M 8 4 L 30 4 L 38 12 L 38 34 L 8 34 Z" fill="#ffffff" stroke="#0288d1" stroke-width="2.5" stroke-linejoin="round"/>
+  <path d="M 30 4 L 30 12 L 38 12 Z" fill="#b3e5fc" stroke="#0288d1" stroke-width="2"/>
+  <!-- Linhas no documento -->
+  <line x1="14" y1="18" x2="30" y2="18" stroke="#cfd8dc" stroke-width="2" stroke-linecap="round"/>
+  <line x1="14" y1="24" x2="24" y2="24" stroke="#cfd8dc" stroke-width="2" stroke-linecap="round"/>
+  <!-- Relógio de precisão temporal TSA -->
+  <circle cx="32" cy="32" r="12" fill="#e1f5fe" stroke="#0288d1" stroke-width="2.5"/>
+  <circle cx="32" cy="32" r="2" fill="#01579b"/>
+  <line x1="32" y1="24" x2="32" y2="32" stroke="#01579b" stroke-width="2.5" stroke-linecap="round"/>
+  <line x1="32" y1="32" x2="38" y2="32" stroke="#01579b" stroke-width="2.5" stroke-linecap="round"/>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/tutorial.svg b/modules/cybercore-ui/src/main/resources/assets/icons/tutorial.svg
new file mode 100644
index 0000000..32d13d2
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/tutorial.svg
@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Monitor de computador -->
+  <rect x="4" y="6" width="40" height="28" rx="4" fill="#ffffff" stroke="#0288d1" stroke-width="2.5"/>
+  <!-- Base do monitor -->
+  <path d="M 16 34 L 12 42 L 36 42 L 32 34" fill="none" stroke="#0288d1" stroke-width="2.5" stroke-linejoin="round"/>
+  <!-- Ícone de play/vídeo tutorial central -->
+  <polygon points="20,14 32,20 20,26" fill="#0288d1"/>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/validate-timestamp.svg b/modules/cybercore-ui/src/main/resources/assets/icons/validate-timestamp.svg
new file mode 100644
index 0000000..dc0f7c8
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/validate-timestamp.svg
@@ -0,0 +1,10 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Círculo de relógio base -->
+  <circle cx="24" cy="24" r="20" fill="#f1f8e9" stroke="#558b2f" stroke-width="2.5"/>
+  <!-- Ponteiros do relógio -->
+  <line x1="24" y1="12" x2="24" y2="24" stroke="#33691e" stroke-width="2" stroke-linecap="round"/>
+  <line x1="24" y1="24" x2="32" y2="24" stroke="#33691e" stroke-width="2" stroke-linecap="round"/>
+  <!-- Checkmark verde de validação de tempo -->
+  <circle cx="34" cy="34" r="10" fill="#2e7d32"/>
+  <path d="M 29 34 L 33 38 L 39 30" fill="none" stroke="#ffffff" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/validate.svg b/modules/cybercore-ui/src/main/resources/assets/icons/validate.svg
new file mode 100644
index 0000000..f654ce8
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/validate.svg
@@ -0,0 +1,11 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Folha de documento com dobra -->
+  <path d="M 8 4 L 32 4 L 42 14 L 42 44 L 8 44 Z" fill="#ffffff" stroke="#0288d1" stroke-width="2.5" stroke-linejoin="round"/>
+  <path d="M 32 4 L 32 14 L 42 14 Z" fill="#b3e5fc" stroke="#0288d1" stroke-width="2"/>
+  <!-- Linhas no documento -->
+  <line x1="14" y1="20" x2="34" y2="20" stroke="#cfd8dc" stroke-width="2" stroke-linecap="round"/>
+  <line x1="14" y1="26" x2="28" y2="26" stroke="#cfd8dc" stroke-width="2" stroke-linecap="round"/>
+  <!-- Emblema de validação com Checkmark verde -->
+  <circle cx="30" cy="34" r="11" fill="#e8f5e9" stroke="#2e7d32" stroke-width="2.5"/>
+  <path d="M 24 34 L 28 38 L 36 29" fill="none" stroke="#2e7d32" stroke-width="3.2" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/icons/xml.svg b/modules/cybercore-ui/src/main/resources/assets/icons/xml.svg
new file mode 100644
index 0000000..edbf6a9
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/assets/icons/xml.svg
@@ -0,0 +1,13 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
+  <!-- Folha de documento com dobra -->
+  <path d="M 8 4 L 32 4 L 42 14 L 42 44 L 8 44 Z" fill="#ffffff" stroke="#0288d1" stroke-width="2.5" stroke-linejoin="round"/>
+  <!-- Dobra de canto -->
+  <path d="M 32 4 L 32 14 L 42 14 Z" fill="#b3e5fc" stroke="#0288d1" stroke-width="2" stroke-linejoin="round"/>
+  <!-- Linhas de texto representativas -->
+  <line x1="14" y1="20" x2="28" y2="20" stroke="#b0bec5" stroke-width="2" stroke-linecap="round"/>
+  <line x1="14" y1="25" x2="36" y2="25" stroke="#b0bec5" stroke-width="2" stroke-linecap="round"/>
+  <line x1="14" y1="30" x2="36" y2="30" stroke="#b0bec5" stroke-width="2" stroke-linecap="round"/>
+  <!-- Etiqueta azul com sigla XML -->
+  <rect x="10" y="33" width="28" height="11" rx="3" fill="#0288d1"/>
+  <text x="24" y="41.5" font-family="Segoe UI, Arial, sans-serif" font-size="8" font-weight="bold" fill="#ffffff" text-anchor="middle">&lt;XML&gt;</text>
+</svg>
diff --git a/modules/cybercore-ui/src/main/resources/assets/images/app-icon.png b/modules/cybercore-ui/src/main/resources/assets/images/app-icon.png
new file mode 100644
index 0000000..e9e231b
Binary files /dev/null and b/modules/cybercore-ui/src/main/resources/assets/images/app-icon.png differ
diff --git a/modules/cybercore-ui/src/main/resources/assets/images/app-logo.png b/modules/cybercore-ui/src/main/resources/assets/images/app-logo.png
new file mode 100644
index 0000000..0cea4b9
Binary files /dev/null and b/modules/cybercore-ui/src/main/resources/assets/images/app-logo.png differ
diff --git a/modules/cybercore-ui/src/main/resources/assets/images/brand-banner.png b/modules/cybercore-ui/src/main/resources/assets/images/brand-banner.png
new file mode 100644
index 0000000..6bd57c9
Binary files /dev/null and b/modules/cybercore-ui/src/main/resources/assets/images/brand-banner.png differ
diff --git a/modules/cybercore-ui/src/main/resources/assets/images/default-seal.png b/modules/cybercore-ui/src/main/resources/assets/images/default-seal.png
new file mode 100644
index 0000000..d12d737
Binary files /dev/null and b/modules/cybercore-ui/src/main/resources/assets/images/default-seal.png differ
diff --git a/modules/cybercore-ui/src/main/resources/styles/theme.css b/modules/cybercore-ui/src/main/resources/styles/theme.css
new file mode 100644
index 0000000..8047762
--- /dev/null
+++ b/modules/cybercore-ui/src/main/resources/styles/theme.css
@@ -0,0 +1,1065 @@
+/* ==========================================================================
+   CyberCore Signer — Dual Theme Design System (Claro / Escuro)
+   Paleta Harmonizada e Alto Contraste (WCAG AA Compliant)
+   ========================================================================== */
+
+.root {
+    -fx-font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
+    -fx-font-size: 13px;
+}
+
+/* ==========================================================================
+   1. TEMA CLARO (LIGHT THEME)
+   ========================================================================== */
+
+.theme-light {
+    -fx-base: #f8fafc;
+    -fx-background: #f1f5f9;
+    -fx-control-inner-background: #ffffff;
+    -fx-text-fill: #0f172a;
+}
+
+.theme-light.cyber-root,
+.theme-light .cyber-root,
+.theme-light.serpro-root,
+.theme-light .serpro-root,
+.theme-light.dialog-container,
+.theme-light .dialog-container {
+    -fx-background-color: #f1f5f9;
+}
+
+/* Header Claro */
+.theme-light .cyber-header-bar {
+    -fx-background-color: #ffffff;
+    -fx-border-color: #e2e8f0;
+    -fx-border-width: 0 0 1px 0;
+    -fx-padding: 12px 24px;
+}
+
+.theme-light .cyber-brand-title {
+    -fx-font-size: 17px;
+    -fx-font-weight: bold;
+    -fx-text-fill: #0f172a;
+}
+
+.theme-light .cyber-brand-subtitle {
+    -fx-font-size: 11px;
+    -fx-text-fill: #64748b;
+}
+
+.theme-light .cyber-status-badge {
+    -fx-background-color: #ecfdf5;
+    -fx-border-color: #10b981;
+    -fx-border-radius: 14px;
+    -fx-border-width: 1px;
+    -fx-background-radius: 14px;
+    -fx-text-fill: #047857;
+    -fx-padding: 5px 12px;
+    -fx-font-size: 11.5px;
+    -fx-font-weight: bold;
+}
+
+/* Botão Toggle de Tema */
+.theme-light .theme-toggle-btn {
+    -fx-background-color: #ffffff;
+    -fx-border-color: #cbd5e1;
+    -fx-border-radius: 18px;
+    -fx-border-width: 1px;
+    -fx-background-radius: 18px;
+    -fx-text-fill: #334155;
+    -fx-padding: 5px 12px;
+    -fx-font-size: 11.5px;
+    -fx-font-weight: bold;
+    -fx-cursor: hand;
+    -fx-effect: dropshadow(three-pass-box, rgba(0, 0, 0, 0.04), 4, 0, 0, 1);
+}
+
+.theme-light .theme-toggle-btn:hover {
+    -fx-background-color: #f8fafc;
+    -fx-border-color: #0284c7;
+    -fx-text-fill: #0284c7;
+}
+
+/* Cartões de Ação (Hub Central) - Modo Claro */
+.theme-light .cyber-action-card,
+.theme-light .serpro-action-btn {
+    -fx-background-color: #ffffff;
+    -fx-border-color: #e2e8f0;
+    -fx-border-width: 1.2px;
+    -fx-border-radius: 8px;
+    -fx-background-radius: 8px;
+    -fx-padding: 6px 10px;
+    -fx-alignment: CENTER_LEFT;
+    -fx-cursor: hand;
+    -fx-pref-height: 68px;
+    -fx-min-height: 68px;
+    -fx-max-width: Infinity;
+    -fx-effect: dropshadow(three-pass-box, rgba(15, 23, 42, 0.04), 6, 0, 0, 2);
+}
+
+.theme-light .cyber-action-card:hover,
+.theme-light .serpro-action-btn:hover {
+    -fx-background-color: #ffffff;
+    -fx-border-color: #0284c7;
+    -fx-effect: dropshadow(three-pass-box, rgba(2, 132, 199, 0.16), 8, 0, 0, 3);
+}
+
+.theme-light .cyber-action-card:pressed,
+.theme-light .serpro-action-btn:pressed {
+    -fx-background-color: #f0f9ff;
+    -fx-border-color: #0369a1;
+}
+
+.theme-light .cyber-action-text,
+.theme-light .serpro-action-text {
+    -fx-font-size: 11.5px;
+    -fx-font-weight: bold;
+    -fx-text-fill: #1e293b;
+    -fx-line-spacing: 1px;
+}
+
+/* Painel Lateral - Modo Claro */
+.theme-light .cyber-side-column {
+    -fx-background-color: #ffffff;
+    -fx-border-color: #e2e8f0;
+    -fx-border-width: 1px;
+    -fx-border-radius: 10px;
+    -fx-background-radius: 10px;
+    -fx-padding: 14px;
+    -fx-effect: dropshadow(three-pass-box, rgba(15, 23, 42, 0.03), 6, 0, 0, 2);
+}
+
+.theme-light .cyber-side-card,
+.theme-light .serpro-side-btn {
+    -fx-background-color: #f8fafc;
+    -fx-border-color: #e2e8f0;
+    -fx-border-width: 1px;
+    -fx-border-radius: 6px;
+    -fx-background-radius: 6px;
+    -fx-padding: 8px 12px;
+    -fx-alignment: CENTER_LEFT;
+    -fx-cursor: hand;
+    -fx-pref-height: 42px;
+    -fx-min-height: 42px;
+    -fx-max-width: Infinity;
+}
+
+.theme-light .cyber-side-card:hover,
+.theme-light .serpro-side-btn:hover {
+    -fx-background-color: #f0f9ff;
+    -fx-border-color: #0284c7;
+    -fx-effect: dropshadow(three-pass-box, rgba(2, 132, 199, 0.12), 4, 0, 0, 1);
+}
+
+.theme-light .cyber-side-card:pressed,
+.theme-light .serpro-side-btn:pressed {
+    -fx-background-color: #e0f2fe;
+}
+
+.theme-light .cyber-side-text,
+.theme-light .serpro-side-text {
+    -fx-font-size: 12.5px;
+    -fx-font-weight: bold;
+    -fx-text-fill: #334155;
+}
+
+.theme-light .cyber-version-label,
+.theme-light .serpro-version-label {
+    -fx-font-size: 11px;
+    -fx-text-fill: #64748b;
+}
+
+/* Diálogos e Caixas - Modo Claro */
+.theme-light .dialog-header,
+.theme-light .dialog-title,
+.theme-light .section-title {
+    -fx-font-size: 16px;
+    -fx-font-weight: bold;
+    -fx-text-fill: #0369a1;
+}
+
+.theme-light .dialog-subtitle,
+.theme-light .section-subtitle,
+.theme-light .brand-subtitle {
+    -fx-font-size: 12px;
+    -fx-text-fill: #64748b;
+}
+
+.theme-light .dialog-box,
+.theme-light .content-card {
+    -fx-background-color: #ffffff;
+    -fx-background-radius: 8px;
+    -fx-border-color: #e2e8f0;
+    -fx-border-radius: 8px;
+    -fx-border-width: 1px;
+    -fx-padding: 16px;
+    -fx-effect: dropshadow(three-pass-box, rgba(0, 0, 0, 0.04), 6, 0, 0, 2);
+}
+
+.theme-light .label {
+    -fx-text-fill: #1e293b;
+}
+
+.theme-light .form-label {
+    -fx-font-size: 12px;
+    -fx-font-weight: bold;
+    -fx-text-fill: #334155;
+}
+
+.theme-light .form-label-muted {
+    -fx-font-size: 11px;
+    -fx-text-fill: #64748b;
+}
+
+.theme-light .dialog-field-title {
+    -fx-font-size: 12px;
+    -fx-font-weight: bold;
+    -fx-text-fill: #0369a1;
+}
+
+.theme-light .dialog-field-value,
+.theme-light .detail-value {
+    -fx-font-size: 13px;
+    -fx-text-fill: #0f172a;
+}
+
+.theme-light .dialog-hash-value {
+    -fx-font-family: "Courier New", monospace;
+    -fx-font-size: 12px;
+    -fx-text-fill: #0369a1;
+    -fx-background-color: #f1f5f9;
+    -fx-border-color: #e2e8f0;
+    -fx-border-radius: 4px;
+    -fx-padding: 8px;
+    -fx-background-radius: 4px;
+}
+
+.theme-light .log-console-area {
+    -fx-font-family: 'Consolas', 'Courier New', monospace;
+    -fx-font-size: 11.5px;
+    -fx-control-inner-background: #f8fafc;
+    -fx-text-fill: #0369a1;
+    -fx-border-color: #cbd5e1;
+    -fx-border-radius: 6px;
+    -fx-background-radius: 6px;
+}
+
+.theme-light .seal-preview-box {
+    -fx-background-color: #f8fafc;
+    -fx-border-color: #cbd5e1;
+    -fx-border-radius: 8px;
+    -fx-background-radius: 8px;
+    -fx-padding: 12px;
+    -fx-alignment: CENTER;
+}
+
+
+/* Controles de Formulário - Modo Claro */
+.theme-light .text-field,
+.theme-light .password-field {
+    -fx-background-color: #ffffff;
+    -fx-border-color: #cbd5e1;
+    -fx-border-radius: 6px;
+    -fx-background-radius: 6px;
+    -fx-text-fill: #0f172a;
+    -fx-prompt-text-fill: #94a3b8;
+    -fx-padding: 7px 12px;
+}
+
+.theme-light .text-field:focused,
+.theme-light .password-field:focused {
+    -fx-border-color: #0284c7;
+    -fx-background-color: #ffffff;
+}
+
+.theme-light .combo-box {
+    -fx-background-color: #ffffff;
+    -fx-border-color: #cbd5e1;
+    -fx-border-radius: 6px;
+    -fx-background-radius: 6px;
+    -fx-padding: 3px 6px;
+}
+
+.theme-light .combo-box .cell {
+    -fx-text-fill: #0f172a;
+}
+
+.theme-light .combo-box-popup .list-view {
+    -fx-background-color: #ffffff;
+    -fx-border-color: #cbd5e1;
+    -fx-border-radius: 6px;
+    -fx-background-radius: 6px;
+    -fx-effect: dropshadow(three-pass-box, rgba(0, 0, 0, 0.08), 8, 0, 0, 3);
+}
+
+.theme-light .combo-box-popup .list-cell {
+    -fx-text-fill: #0f172a;
+    -fx-padding: 7px 12px;
+}
+
+.theme-light .combo-box-popup .list-cell:hover,
+.theme-light .combo-box-popup .list-cell:filled:selected {
+    -fx-background-color: #e0f2fe;
+    -fx-text-fill: #0369a1;
+}
+
+/* CheckBox - Modo Claro (CORRIGIDO: texto perfeitamente visível) */
+.theme-light .check-box {
+    -fx-text-fill: #1e293b;
+    -fx-font-size: 13px;
+}
+
+.theme-light .check-box > .box {
+    -fx-background-color: #ffffff;
+    -fx-border-color: #cbd5e1;
+    -fx-border-radius: 4px;
+    -fx-background-radius: 4px;
+    -fx-border-width: 1.2px;
+    -fx-padding: 3px;
+}
+
+.theme-light .check-box:selected > .box {
+    -fx-background-color: #0284c7;
+    -fx-border-color: #0284c7;
+}
+
+.theme-light .check-box:selected > .box > .mark {
+    -fx-background-color: #ffffff;
+}
+
+/* RadioButton - Modo Claro */
+.theme-light .radio-button {
+    -fx-text-fill: #1e293b;
+    -fx-font-size: 13px;
+}
+
+.theme-light .radio-button > .radio {
+    -fx-background-color: #ffffff;
+    -fx-border-color: #cbd5e1;
+    -fx-border-radius: 100px;
+    -fx-background-radius: 100px;
+    -fx-border-width: 1.5px;
+    -fx-padding: 3px;
+    -fx-alignment: center;
+}
+
+.theme-light .radio-button:selected > .radio {
+    -fx-border-color: #0284c7;
+}
+
+.theme-light .radio-button:selected > .radio > .dot {
+    -fx-background-color: #0284c7;
+    -fx-background-radius: 100px;
+    -fx-padding: 4px;
+    -fx-background-insets: 0;
+}
+
+/* ColorPicker - Modo Claro */
+.theme-light .color-picker {
+    -fx-background-color: #ffffff;
+    -fx-border-color: #cbd5e1;
+    -fx-border-radius: 6px;
+    -fx-background-radius: 6px;
+    -fx-border-width: 1.2px;
+    -fx-padding: 3px 6px;
+    -fx-pref-height: 32px;
+    -fx-cursor: hand;
+}
+
+.theme-light .color-picker:hover {
+    -fx-border-color: #0284c7;
+}
+
+.theme-light .color-picker .color-picker-label {
+    -fx-text-fill: #1e293b;
+    -fx-font-weight: bold;
+    -fx-font-size: 11.5px;
+}
+
+.theme-light .color-row {
+    -fx-alignment: CENTER_LEFT;
+    -fx-spacing: 12px;
+    -fx-padding: 3px 0;
+}
+
+/* Tabela - Modo Claro */
+.theme-light .table-view {
+    -fx-background-color: #ffffff;
+    -fx-border-color: #cbd5e1;
+    -fx-border-radius: 6px;
+    -fx-background-radius: 6px;
+}
+
+.theme-light .table-view .column-header-background {
+    -fx-background-color: #f8fafc;
+    -fx-border-color: #e2e8f0;
+    -fx-border-width: 0 0 1px 0;
+}
+
+.theme-light .table-view .column-header .label {
+    -fx-text-fill: #334155;
+    -fx-font-weight: bold;
+    -fx-font-size: 12px;
+}
+
+.theme-light .table-view .table-row-cell {
+    -fx-background-color: #ffffff;
+    -fx-border-color: transparent transparent #f1f5f9 transparent;
+    -fx-border-width: 0 0 1px 0;
+}
+
+.theme-light .table-view .table-row-cell:odd {
+    -fx-background-color: #f8fafc;
+}
+
+.theme-light .table-view .table-row-cell:hover {
+    -fx-background-color: #f0f9ff;
+}
+
+.theme-light .table-view .table-row-cell:filled:selected {
+    -fx-background-color: #e0f2fe;
+}
+
+.theme-light .table-view .table-cell {
+    -fx-text-fill: #0f172a;
+    -fx-padding: 8px 12px;
+}
+
+.theme-light .table-view .placeholder .label {
+    -fx-text-fill: #64748b;
+}
+
+/* ==========================================================================
+   2. TEMA ESCURO (DARK THEME)
+   ========================================================================== */
+
+.theme-dark {
+    -fx-base: #121824;
+    -fx-background: #0b0f17;
+    -fx-control-inner-background: #131c2e;
+    -fx-text-fill: #f1f5f9;
+}
+
+.theme-dark.cyber-root,
+.theme-dark .cyber-root,
+.theme-dark.serpro-root,
+.theme-dark .serpro-root,
+.theme-dark.dialog-container,
+.theme-dark .dialog-container {
+    -fx-background-color: #0b0f17;
+}
+
+/* Header Escuro */
+.theme-dark .cyber-header-bar {
+    -fx-background-color: #121824;
+    -fx-border-color: #1e293b;
+    -fx-border-width: 0 0 1px 0;
+    -fx-padding: 12px 24px;
+}
+
+.theme-dark .cyber-brand-title {
+    -fx-font-size: 17px;
+    -fx-font-weight: bold;
+    -fx-text-fill: #ffffff;
+}
+
+.theme-dark .cyber-brand-subtitle {
+    -fx-font-size: 11px;
+    -fx-text-fill: #94a3b8;
+}
+
+.theme-dark .cyber-status-badge {
+    -fx-background-color: rgba(16, 185, 129, 0.15);
+    -fx-border-color: #10b981;
+    -fx-border-radius: 14px;
+    -fx-border-width: 1px;
+    -fx-background-radius: 14px;
+    -fx-text-fill: #34d399;
+    -fx-padding: 5px 12px;
+    -fx-font-size: 11.5px;
+    -fx-font-weight: bold;
+}
+
+/* Botão Toggle de Tema */
+.theme-dark .theme-toggle-btn {
+    -fx-background-color: #1e293b;
+    -fx-border-color: #334155;
+    -fx-border-radius: 18px;
+    -fx-border-width: 1px;
+    -fx-background-radius: 18px;
+    -fx-text-fill: #e2e8f0;
+    -fx-padding: 5px 12px;
+    -fx-font-size: 11.5px;
+    -fx-font-weight: bold;
+    -fx-cursor: hand;
+    -fx-effect: dropshadow(three-pass-box, rgba(0, 0, 0, 0.25), 4, 0, 0, 1);
+}
+
+.theme-dark .theme-toggle-btn:hover {
+    -fx-background-color: #334155;
+    -fx-border-color: #38bdf8;
+    -fx-text-fill: #38bdf8;
+}
+
+/* Cartões de Ação (Hub Central) - Modo Escuro */
+.theme-dark .cyber-action-card,
+.theme-dark .serpro-action-btn {
+    -fx-background-color: #131c2e;
+    -fx-border-color: #1e293b;
+    -fx-border-width: 1.2px;
+    -fx-border-radius: 8px;
+    -fx-background-radius: 8px;
+    -fx-padding: 8px 12px;
+    -fx-alignment: CENTER_LEFT;
+    -fx-cursor: hand;
+    -fx-pref-height: 72px;
+    -fx-min-height: 72px;
+    -fx-max-width: Infinity;
+    -fx-effect: dropshadow(three-pass-box, rgba(0, 0, 0, 0.35), 8, 0, 0, 2);
+}
+
+.theme-dark .cyber-action-card:hover,
+.theme-dark .serpro-action-btn:hover {
+    -fx-background-color: #182338;
+    -fx-border-color: #38bdf8;
+    -fx-effect: dropshadow(three-pass-box, rgba(56, 189, 248, 0.2), 10, 0, 0, 3);
+}
+
+.theme-dark .cyber-action-card:pressed,
+.theme-dark .serpro-action-btn:pressed {
+    -fx-background-color: #0f172a;
+    -fx-border-color: #0284c7;
+}
+
+.theme-dark .cyber-action-text,
+.theme-dark .serpro-action-text {
+    -fx-font-size: 11.5px;
+    -fx-font-weight: bold;
+    -fx-text-fill: #f8fafc;
+    -fx-line-spacing: 1px;
+}
+
+/* Painel Lateral - Modo Escuro */
+.theme-dark .cyber-side-column {
+    -fx-background-color: #121824;
+    -fx-border-color: #1e293b;
+    -fx-border-width: 1px;
+    -fx-border-radius: 10px;
+    -fx-background-radius: 10px;
+    -fx-padding: 14px;
+    -fx-effect: dropshadow(three-pass-box, rgba(0, 0, 0, 0.3), 8, 0, 0, 2);
+}
+
+.theme-dark .cyber-side-card,
+.theme-dark .serpro-side-btn {
+    -fx-background-color: #131c2e;
+    -fx-border-color: #1e293b;
+    -fx-border-width: 1px;
+    -fx-border-radius: 6px;
+    -fx-background-radius: 6px;
+    -fx-padding: 8px 12px;
+    -fx-alignment: CENTER_LEFT;
+    -fx-cursor: hand;
+    -fx-pref-height: 42px;
+    -fx-min-height: 42px;
+    -fx-max-width: Infinity;
+}
+
+.theme-dark .cyber-side-card:hover,
+.theme-dark .serpro-side-btn:hover {
+    -fx-background-color: #1a253c;
+    -fx-border-color: #38bdf8;
+    -fx-effect: dropshadow(three-pass-box, rgba(56, 189, 248, 0.15), 4, 0, 0, 1);
+}
+
+.theme-dark .cyber-side-card:pressed,
+.theme-dark .serpro-side-btn:pressed {
+    -fx-background-color: #0f172a;
+}
+
+.theme-dark .cyber-side-text,
+.theme-dark .serpro-side-text {
+    -fx-font-size: 12.5px;
+    -fx-font-weight: bold;
+    -fx-text-fill: #cbd5e1;
+}
+
+.theme-dark .cyber-version-label,
+.theme-dark .serpro-version-label {
+    -fx-font-size: 11px;
+    -fx-text-fill: #94a3b8;
+}
+
+/* Diálogos e Caixas - Modo Escuro */
+.theme-dark .dialog-header,
+.theme-dark .dialog-title,
+.theme-dark .section-title {
+    -fx-font-size: 16px;
+    -fx-font-weight: bold;
+    -fx-text-fill: #38bdf8;
+}
+
+.theme-dark .dialog-subtitle,
+.theme-dark .section-subtitle,
+.theme-dark .brand-subtitle {
+    -fx-font-size: 12px;
+    -fx-text-fill: #94a3b8;
+}
+
+.theme-dark .dialog-box,
+.theme-dark .content-card {
+    -fx-background-color: #131c2e;
+    -fx-background-radius: 8px;
+    -fx-border-color: #1e293b;
+    -fx-border-radius: 8px;
+    -fx-border-width: 1px;
+    -fx-padding: 16px;
+    -fx-effect: dropshadow(three-pass-box, rgba(0, 0, 0, 0.35), 8, 0, 0, 2);
+}
+
+.theme-dark .label {
+    -fx-text-fill: #f1f5f9;
+}
+
+.theme-dark .form-label {
+    -fx-font-size: 12px;
+    -fx-font-weight: bold;
+    -fx-text-fill: #cbd5e1;
+}
+
+.theme-dark .form-label-muted {
+    -fx-font-size: 11px;
+    -fx-text-fill: #94a3b8;
+}
+
+.theme-dark .dialog-field-title {
+    -fx-font-size: 12px;
+    -fx-font-weight: bold;
+    -fx-text-fill: #38bdf8;
+}
+
+.theme-dark .dialog-field-value,
+.theme-dark .detail-value {
+    -fx-font-size: 13px;
+    -fx-text-fill: #f1f5f9;
+}
+
+.theme-dark .dialog-hash-value {
+    -fx-font-family: "Courier New", monospace;
+    -fx-font-size: 12px;
+    -fx-text-fill: #38bdf8;
+    -fx-background-color: #090d16;
+    -fx-border-color: #1e293b;
+    -fx-border-radius: 4px;
+    -fx-padding: 8px;
+    -fx-background-radius: 4px;
+}
+
+.theme-dark .log-console-area {
+    -fx-font-family: 'Consolas', 'Courier New', monospace;
+    -fx-font-size: 11.5px;
+    -fx-control-inner-background: #0b1329;
+    -fx-text-fill: #38bdf8;
+    -fx-border-color: #334155;
+    -fx-border-radius: 6px;
+    -fx-background-radius: 6px;
+}
+
+.theme-dark .seal-preview-box {
+    -fx-background-color: #0b1329;
+    -fx-border-color: #334155;
+    -fx-border-radius: 8px;
+    -fx-background-radius: 8px;
+    -fx-padding: 12px;
+    -fx-alignment: CENTER;
+}
+
+/* Controles de Formulário - Modo Escuro */
+.theme-dark .text-field,
+.theme-dark .password-field {
+    -fx-background-color: #0f172a;
+    -fx-border-color: #334155;
+    -fx-border-radius: 6px;
+    -fx-background-radius: 6px;
+    -fx-text-fill: #f1f5f9;
+    -fx-prompt-text-fill: #64748b;
+    -fx-padding: 7px 12px;
+}
+
+.theme-dark .text-field:focused,
+.theme-dark .password-field:focused {
+    -fx-border-color: #38bdf8;
+    -fx-background-color: #0f172a;
+}
+
+.theme-dark .combo-box {
+    -fx-background-color: #131c2e;
+    -fx-border-color: #334155;
+    -fx-border-radius: 6px;
+    -fx-background-radius: 6px;
+    -fx-padding: 3px 6px;
+}
+
+.theme-dark .combo-box .cell {
+    -fx-text-fill: #f1f5f9;
+}
+
+.theme-dark .combo-box-popup .list-view {
+    -fx-background-color: #131c2e;
+    -fx-border-color: #334155;
+    -fx-border-radius: 6px;
+    -fx-background-radius: 6px;
+    -fx-effect: dropshadow(three-pass-box, rgba(0, 0, 0, 0.4), 8, 0, 0, 3);
+}
+
+.theme-dark .combo-box-popup .list-cell {
+    -fx-text-fill: #f1f5f9;
+    -fx-padding: 7px 12px;
+}
+
+.theme-dark .combo-box-popup .list-cell:hover,
+.theme-dark .combo-box-popup .list-cell:filled:selected {
+    -fx-background-color: #1e293b;
+    -fx-text-fill: #38bdf8;
+}
+
+/* CheckBox - Modo Escuro */
+.theme-dark .check-box {
+    -fx-text-fill: #f1f5f9;
+    -fx-font-size: 13px;
+}
+
+.theme-dark .check-box > .box {
+    -fx-background-color: #0f172a;
+    -fx-border-color: #475569;
+    -fx-border-radius: 4px;
+    -fx-background-radius: 4px;
+    -fx-border-width: 1.2px;
+    -fx-padding: 3px;
+}
+
+.theme-dark .check-box:selected > .box {
+    -fx-background-color: #0284c7;
+    -fx-border-color: #38bdf8;
+}
+
+.theme-dark .check-box:selected > .box > .mark {
+    -fx-background-color: #ffffff;
+}
+
+/* RadioButton - Modo Escuro */
+.theme-dark .radio-button {
+    -fx-text-fill: #f1f5f9;
+    -fx-font-size: 13px;
+}
+
+.theme-dark .radio-button > .radio {
+    -fx-background-color: #0f172a;
+    -fx-border-color: #475569;
+    -fx-border-radius: 100px;
+    -fx-background-radius: 100px;
+    -fx-border-width: 1.5px;
+    -fx-padding: 3px;
+    -fx-alignment: center;
+}
+
+.theme-dark .radio-button:selected > .radio {
+    -fx-border-color: #38bdf8;
+}
+
+.theme-dark .radio-button:selected > .radio > .dot {
+    -fx-background-color: #38bdf8;
+    -fx-background-radius: 100px;
+    -fx-padding: 4px;
+    -fx-background-insets: 0;
+}
+
+/* ColorPicker - Modo Escuro */
+.theme-dark .color-picker {
+    -fx-background-color: #0f172a;
+    -fx-border-color: #334155;
+    -fx-border-radius: 6px;
+    -fx-background-radius: 6px;
+    -fx-border-width: 1.2px;
+    -fx-padding: 3px 6px;
+    -fx-pref-height: 32px;
+    -fx-cursor: hand;
+}
+
+.theme-dark .color-picker:hover {
+    -fx-border-color: #38bdf8;
+}
+
+.theme-dark .color-picker .color-picker-label {
+    -fx-text-fill: #f1f5f9;
+    -fx-font-weight: bold;
+    -fx-font-size: 11.5px;
+}
+
+.theme-dark .color-row {
+    -fx-alignment: CENTER_LEFT;
+    -fx-spacing: 12px;
+    -fx-padding: 3px 0;
+}
+
+/* Tabela - Modo Escuro (CORRIGIDO: fundo escuro e textos contrastados) */
+.theme-dark .table-view {
+    -fx-background-color: #0f172a;
+    -fx-border-color: #1e293b;
+    -fx-border-radius: 6px;
+    -fx-background-radius: 6px;
+}
+
+.theme-dark .table-view .column-header-background {
+    -fx-background-color: #131c2e;
+    -fx-border-color: #1e293b;
+    -fx-border-width: 0 0 1px 0;
+}
+
+.theme-dark .table-view .column-header .label {
+    -fx-text-fill: #cbd5e1;
+    -fx-font-weight: bold;
+    -fx-font-size: 12px;
+}
+
+.theme-dark .table-view .table-row-cell {
+    -fx-background-color: #0f172a;
+    -fx-border-color: transparent transparent #1e293b transparent;
+    -fx-border-width: 0 0 1px 0;
+}
+
+.theme-dark .table-view .table-row-cell:odd {
+    -fx-background-color: #131c2e;
+}
+
+.theme-dark .table-view .table-row-cell:hover {
+    -fx-background-color: #1e293b;
+}
+
+.theme-dark .table-view .table-row-cell:filled:selected {
+    -fx-background-color: #1e293b;
+}
+
+.theme-dark .table-view .table-cell {
+    -fx-text-fill: #f1f5f9;
+    -fx-padding: 8px 12px;
+}
+
+.theme-dark .table-view .placeholder .label {
+    -fx-text-fill: #64748b;
+}
+
+/* ==========================================================================
+   3. BOTÕES E COMPONENTES COMUNS (DUAL THEME)
+   ========================================================================== */
+
+.btn-primary {
+    -fx-background-color: #0284c7;
+    -fx-text-fill: #ffffff;
+    -fx-font-weight: bold;
+    -fx-padding: 8px 18px;
+    -fx-background-radius: 6px;
+    -fx-cursor: hand;
+    -fx-effect: dropshadow(three-pass-box, rgba(2, 132, 199, 0.25), 4, 0, 0, 1);
+}
+
+.btn-primary:hover {
+    -fx-background-color: #0369a1;
+}
+
+.btn-secondary {
+    -fx-background-color: #e2e8f0;
+    -fx-text-fill: #1e293b;
+    -fx-font-weight: bold;
+    -fx-padding: 8px 18px;
+    -fx-background-radius: 6px;
+    -fx-cursor: hand;
+}
+
+.btn-secondary:hover {
+    -fx-background-color: #cbd5e1;
+}
+
+.theme-dark .btn-secondary {
+    -fx-background-color: #1e293b;
+    -fx-border-color: #334155;
+    -fx-border-radius: 6px;
+    -fx-border-width: 1px;
+    -fx-text-fill: #e2e8f0;
+}
+
+.theme-dark .btn-secondary:hover {
+    -fx-background-color: #334155;
+    -fx-border-color: #38bdf8;
+    -fx-text-fill: #38bdf8;
+}
+
+.btn-cancel {
+    -fx-background-color: transparent;
+    -fx-border-color: #94a3b8;
+    -fx-border-radius: 6px;
+    -fx-text-fill: #475569;
+    -fx-font-weight: bold;
+    -fx-padding: 8px 18px;
+    -fx-cursor: hand;
+}
+
+.btn-cancel:hover {
+    -fx-border-color: #ef4444;
+    -fx-text-fill: #ef4444;
+}
+
+.theme-dark .btn-cancel {
+    -fx-border-color: #475569;
+    -fx-text-fill: #94a3b8;
+}
+
+.theme-dark .btn-cancel:hover {
+    -fx-border-color: #f87171;
+    -fx-text-fill: #f87171;
+}
+
+/* Botão de Perigo / Exclusão / Remoção */
+.btn-danger {
+    -fx-background-color: #fee2e2;
+    -fx-text-fill: #b91c1c;
+    -fx-border-color: #fca5a5;
+    -fx-border-radius: 6px;
+    -fx-background-radius: 6px;
+    -fx-border-width: 1px;
+    -fx-font-size: 12px;
+    -fx-font-weight: bold;
+    -fx-padding: 6px 14px;
+    -fx-alignment: center;
+    -fx-cursor: hand;
+}
+
+.btn-danger:hover {
+    -fx-background-color: #ef4444;
+    -fx-text-fill: #ffffff;
+    -fx-border-color: #dc2626;
+}
+
+.theme-dark .btn-danger {
+    -fx-background-color: rgba(239, 68, 68, 0.2);
+    -fx-text-fill: #f87171;
+    -fx-border-color: #dc2626;
+    -fx-alignment: center;
+}
+
+.theme-dark .btn-danger:hover {
+    -fx-background-color: #ef4444;
+    -fx-text-fill: #ffffff;
+    -fx-border-color: #ef4444;
+}
+
+/* Badges de Certificados */
+.cert-card {
+    -fx-background-color: #ffffff;
+    -fx-border-color: #e2e8f0;
+    -fx-border-width: 1px;
+    -fx-border-radius: 8px;
+    -fx-background-radius: 8px;
+    -fx-padding: 12px 16px;
+    -fx-effect: dropshadow(three-pass-box, rgba(15, 23, 42, 0.04), 4, 0, 0, 1);
+}
+
+.theme-dark .cert-card {
+    -fx-background-color: #131c2e;
+    -fx-border-color: #1e293b;
+    -fx-effect: dropshadow(three-pass-box, rgba(0, 0, 0, 0.3), 6, 0, 0, 2);
+}
+
+.cert-card:hover {
+    -fx-border-color: #0284c7;
+}
+
+.theme-dark .cert-card:hover {
+    -fx-border-color: #38bdf8;
+}
+
+.cert-title {
+    -fx-font-size: 13.5px;
+    -fx-font-weight: bold;
+    -fx-text-fill: #0f172a;
+}
+
+.theme-dark .cert-title {
+    -fx-text-fill: #f8fafc;
+}
+
+.cert-detail {
+    -fx-font-size: 11.5px;
+    -fx-text-fill: #64748b;
+}
+
+.theme-dark .cert-detail {
+    -fx-text-fill: #94a3b8;
+}
+
+.cert-badge-a1 {
+    -fx-background-color: rgba(2, 132, 199, 0.12);
+    -fx-border-color: #0284c7;
+    -fx-border-radius: 4px;
+    -fx-border-width: 1px;
+    -fx-background-radius: 4px;
+    -fx-text-fill: #0284c7;
+    -fx-padding: 2px 8px;
+    -fx-font-size: 11px;
+    -fx-font-weight: bold;
+}
+
+.cert-badge-a3 {
+    -fx-background-color: rgba(16, 185, 129, 0.12);
+    -fx-border-color: #10b981;
+    -fx-border-radius: 4px;
+    -fx-border-width: 1px;
+    -fx-background-radius: 4px;
+    -fx-text-fill: #10b981;
+    -fx-padding: 2px 8px;
+    -fx-font-size: 11px;
+    -fx-font-weight: bold;
+}
+
+.cert-status-available {
+    -fx-text-fill: #10b981;
+    -fx-font-weight: bold;
+    -fx-font-size: 11.5px;
+}
+
+.cert-status-expired {
+    -fx-text-fill: #ef4444;
+    -fx-font-weight: bold;
+    -fx-font-size: 11.5px;
+}
+
+/* Painel de Pré-Visualização de Selos */
+.seal-preview-box {
+    -fx-background-color: #f8fafc;
+    -fx-border-color: #cbd5e1;
+    -fx-border-radius: 8px;
+    -fx-background-radius: 8px;
+    -fx-border-style: dashed;
+    -fx-padding: 14px;
+    -fx-alignment: center;
+}
+
+.theme-dark .seal-preview-box {
+    -fx-background-color: #090d16;
+    -fx-border-color: #334155;
+}
+
+/* ScrollBar & Progress */
+.progress-bar > .track {
+    -fx-background-color: #e2e8f0;
+    -fx-background-radius: 4px;
+}
+
+.theme-dark .progress-bar > .track {
+    -fx-background-color: #1e293b;
+}
+
+.progress-bar > .bar {
+    -fx-background-color: #0284c7;
+    -fx-background-radius: 4px;
+}
diff --git a/modules/cybercore-ui/src/test/java/br/com/cybercore/signer/ui/CyberCoreUiConstantsTest.java b/modules/cybercore-ui/src/test/java/br/com/cybercore/signer/ui/CyberCoreUiConstantsTest.java
new file mode 100644
index 0000000..267e50b
--- /dev/null
+++ b/modules/cybercore-ui/src/test/java/br/com/cybercore/signer/ui/CyberCoreUiConstantsTest.java
@@ -0,0 +1,22 @@
+package br.com.cybercore.signer.ui;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.net.URL;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class CyberCoreUiConstantsTest {
+
+    @Test
+    @DisplayName("Deve conter constantes de UI válidas e carregar folha de estilos CSS")
+    void shouldHaveValidUiConstants() {
+        assertThat(CyberCoreUiConstants.APP_NAME).isEqualTo("CyberCore Signer");
+        assertThat(CyberCoreUiConstants.APP_VERSION).isNotBlank();
+        assertThat(CyberCoreUiConstants.MAIN_CSS_PATH).isEqualTo("/styles/theme.css");
+
+        URL cssResource = getClass().getResource(CyberCoreUiConstants.MAIN_CSS_PATH);
+        assertThat(cssResource).isNotNull();
+    }
+}
diff --git a/modules/cybercore-ui/src/test/java/br/com/cybercore/signer/ui/UiPreviewGenerator.java b/modules/cybercore-ui/src/test/java/br/com/cybercore/signer/ui/UiPreviewGenerator.java
new file mode 100644
index 0000000..ae066c6
--- /dev/null
+++ b/modules/cybercore-ui/src/test/java/br/com/cybercore/signer/ui/UiPreviewGenerator.java
@@ -0,0 +1,73 @@
+package br.com.cybercore.signer.ui;
+
+import br.com.cybercore.signer.ui.theme.ThemeManager;
+import br.com.cybercore.signer.ui.view.MainAppView;
+import javafx.application.Application;
+import javafx.application.Platform;
+import javafx.scene.Scene;
+import javafx.scene.image.PixelReader;
+import javafx.scene.image.WritableImage;
+import javafx.stage.Stage;
+
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
+import java.io.File;
+
+public class UiPreviewGenerator extends Application {
+
+    public static void main(String[] args) {
+        Application.launch(UiPreviewGenerator.class, args);
+    }
+
+    @Override
+    public void start(Stage primaryStage) {
+        // 1. Inicia com Tema Claro
+        ThemeManager.setCurrentTheme(ThemeManager.AppTheme.LIGHT);
+
+        MainAppView appView = new MainAppView(primaryStage);
+        appView.show();
+
+        Platform.runLater(() -> {
+            try {
+                File outputDir = new File("docs/screenshots");
+                outputDir.mkdirs();
+
+                // Snapshot Modo Claro
+                saveNodeSnapshot(primaryStage.getScene(), new File(outputDir, "01_layout_claro.png"));
+
+                // 2. Alterna para Tema Escuro
+                ThemeManager.setCurrentTheme(ThemeManager.AppTheme.DARK);
+                ThemeManager.applyTheme(primaryStage.getScene());
+
+                Platform.runLater(() -> {
+                    try {
+                        // Snapshot Modo Escuro
+                        saveNodeSnapshot(primaryStage.getScene(), new File(outputDir, "02_layout_escuro.png"));
+                    } catch (Exception e) {
+                        e.printStackTrace();
+                    } finally {
+                        Platform.exit();
+                    }
+                });
+
+            } catch (Exception e) {
+                e.printStackTrace();
+                Platform.exit();
+            }
+        });
+    }
+
+    private static void saveNodeSnapshot(Scene scene, File targetFile) throws Exception {
+        WritableImage image = scene.snapshot(null);
+        int w = (int) image.getWidth();
+        int h = (int) image.getHeight();
+        BufferedImage bufferedImage = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
+        PixelReader reader = image.getPixelReader();
+        for (int y = 0; y < h; y++) {
+            for (int x = 0; x < w; x++) {
+                bufferedImage.setRGB(x, y, reader.getArgb(x, y));
+            }
+        }
+        ImageIO.write(bufferedImage, "png", targetFile);
+    }
+}
diff --git a/modules/cybercore-ui/src/test/java/br/com/cybercore/signer/ui/UiPreviewLauncher.java b/modules/cybercore-ui/src/test/java/br/com/cybercore/signer/ui/UiPreviewLauncher.java
new file mode 100644
index 0000000..66c1fc1
--- /dev/null
+++ b/modules/cybercore-ui/src/test/java/br/com/cybercore/signer/ui/UiPreviewLauncher.java
@@ -0,0 +1,9 @@
+package br.com.cybercore.signer.ui;
+
+import javafx.application.Application;
+
+public class UiPreviewLauncher {
+    public static void main(String[] args) {
+        Application.launch(UiPreviewGenerator.class, args);
+    }
+}
diff --git a/mvnw b/mvnw
new file mode 100755
index 0000000..bd8896b
--- /dev/null
+++ b/mvnw
@@ -0,0 +1,295 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Apache Maven Wrapper startup batch script, version 3.3.4
+#
+# Optional ENV vars
+# -----------------
+#   JAVA_HOME - location of a JDK home dir, required when download maven via java source
+#   MVNW_REPOURL - repo url base for downloading maven distribution
+#   MVNW_USERNAME/MVNW_PASSWORD - user and password for downloading maven
+#   MVNW_VERBOSE - true: enable verbose log; debug: trace the mvnw script; others: silence the output
+# ----------------------------------------------------------------------------
+
+set -euf
+[ "${MVNW_VERBOSE-}" != debug ] || set -x
+
+# OS specific support.
+native_path() { printf %s\\n "$1"; }
+case "$(uname)" in
+CYGWIN* | MINGW*)
+  [ -z "${JAVA_HOME-}" ] || JAVA_HOME="$(cygpath --unix "$JAVA_HOME")"
+  native_path() { cygpath --path --windows "$1"; }
+  ;;
+esac
+
+# set JAVACMD and JAVACCMD
+set_java_home() {
+  # For Cygwin and MinGW, ensure paths are in Unix format before anything is touched
+  if [ -n "${JAVA_HOME-}" ]; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ]; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+      JAVACCMD="$JAVA_HOME/jre/sh/javac"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+      JAVACCMD="$JAVA_HOME/bin/javac"
+
+      if [ ! -x "$JAVACMD" ] || [ ! -x "$JAVACCMD" ]; then
+        echo "The JAVA_HOME environment variable is not defined correctly, so mvnw cannot run." >&2
+        echo "JAVA_HOME is set to \"$JAVA_HOME\", but \"\$JAVA_HOME/bin/java\" or \"\$JAVA_HOME/bin/javac\" does not exist." >&2
+        return 1
+      fi
+    fi
+  else
+    JAVACMD="$(
+      'set' +e
+      'unset' -f command 2>/dev/null
+      'command' -v java
+    )" || :
+    JAVACCMD="$(
+      'set' +e
+      'unset' -f command 2>/dev/null
+      'command' -v javac
+    )" || :
+
+    if [ ! -x "${JAVACMD-}" ] || [ ! -x "${JAVACCMD-}" ]; then
+      echo "The java/javac command does not exist in PATH nor is JAVA_HOME set, so mvnw cannot run." >&2
+      return 1
+    fi
+  fi
+}
+
+# hash string like Java String::hashCode
+hash_string() {
+  str="${1:-}" h=0
+  while [ -n "$str" ]; do
+    char="${str%"${str#?}"}"
+    h=$(((h * 31 + $(LC_CTYPE=C printf %d "'$char")) % 4294967296))
+    str="${str#?}"
+  done
+  printf %x\\n $h
+}
+
+verbose() { :; }
+[ "${MVNW_VERBOSE-}" != true ] || verbose() { printf %s\\n "${1-}"; }
+
+die() {
+  printf %s\\n "$1" >&2
+  exit 1
+}
+
+trim() {
+  # MWRAPPER-139:
+  #   Trims trailing and leading whitespace, carriage returns, tabs, and linefeeds.
+  #   Needed for removing poorly interpreted newline sequences when running in more
+  #   exotic environments such as mingw bash on Windows.
+  printf "%s" "${1}" | tr -d '[:space:]'
+}
+
+scriptDir="$(dirname "$0")"
+scriptName="$(basename "$0")"
+
+# parse distributionUrl and optional distributionSha256Sum, requires .mvn/wrapper/maven-wrapper.properties
+while IFS="=" read -r key value; do
+  case "${key-}" in
+  distributionUrl) distributionUrl=$(trim "${value-}") ;;
+  distributionSha256Sum) distributionSha256Sum=$(trim "${value-}") ;;
+  esac
+done <"$scriptDir/.mvn/wrapper/maven-wrapper.properties"
+[ -n "${distributionUrl-}" ] || die "cannot read distributionUrl property in $scriptDir/.mvn/wrapper/maven-wrapper.properties"
+
+case "${distributionUrl##*/}" in
+maven-mvnd-*bin.*)
+  MVN_CMD=mvnd.sh _MVNW_REPO_PATTERN=/maven/mvnd/
+  case "${PROCESSOR_ARCHITECTURE-}${PROCESSOR_ARCHITEW6432-}:$(uname -a)" in
+  *AMD64:CYGWIN* | *AMD64:MINGW*) distributionPlatform=windows-amd64 ;;
+  :Darwin*x86_64) distributionPlatform=darwin-amd64 ;;
+  :Darwin*arm64) distributionPlatform=darwin-aarch64 ;;
+  :Linux*x86_64*) distributionPlatform=linux-amd64 ;;
+  *)
+    echo "Cannot detect native platform for mvnd on $(uname)-$(uname -m), use pure java version" >&2
+    distributionPlatform=linux-amd64
+    ;;
+  esac
+  distributionUrl="${distributionUrl%-bin.*}-$distributionPlatform.zip"
+  ;;
+maven-mvnd-*) MVN_CMD=mvnd.sh _MVNW_REPO_PATTERN=/maven/mvnd/ ;;
+*) MVN_CMD="mvn${scriptName#mvnw}" _MVNW_REPO_PATTERN=/org/apache/maven/ ;;
+esac
+
+# apply MVNW_REPOURL and calculate MAVEN_HOME
+# maven home pattern: ~/.m2/wrapper/dists/{apache-maven-<version>,maven-mvnd-<version>-<platform>}/<hash>
+[ -z "${MVNW_REPOURL-}" ] || distributionUrl="$MVNW_REPOURL$_MVNW_REPO_PATTERN${distributionUrl#*"$_MVNW_REPO_PATTERN"}"
+distributionUrlName="${distributionUrl##*/}"
+distributionUrlNameMain="${distributionUrlName%.*}"
+distributionUrlNameMain="${distributionUrlNameMain%-bin}"
+MAVEN_USER_HOME="${MAVEN_USER_HOME:-${HOME}/.m2}"
+MAVEN_HOME="${MAVEN_USER_HOME}/wrapper/dists/${distributionUrlNameMain-}/$(hash_string "$distributionUrl")"
+
+exec_maven() {
+  unset MVNW_VERBOSE MVNW_USERNAME MVNW_PASSWORD MVNW_REPOURL || :
+  exec "$MAVEN_HOME/bin/$MVN_CMD" "$@" || die "cannot exec $MAVEN_HOME/bin/$MVN_CMD"
+}
+
+if [ -d "$MAVEN_HOME" ]; then
+  verbose "found existing MAVEN_HOME at $MAVEN_HOME"
+  exec_maven "$@"
+fi
+
+case "${distributionUrl-}" in
+*?-bin.zip | *?maven-mvnd-?*-?*.zip) ;;
+*) die "distributionUrl is not valid, must match *-bin.zip or maven-mvnd-*.zip, but found '${distributionUrl-}'" ;;
+esac
+
+# prepare tmp dir
+if TMP_DOWNLOAD_DIR="$(mktemp -d)" && [ -d "$TMP_DOWNLOAD_DIR" ]; then
+  clean() { rm -rf -- "$TMP_DOWNLOAD_DIR"; }
+  trap clean HUP INT TERM EXIT
+else
+  die "cannot create temp dir"
+fi
+
+mkdir -p -- "${MAVEN_HOME%/*}"
+
+# Download and Install Apache Maven
+verbose "Couldn't find MAVEN_HOME, downloading and installing it ..."
+verbose "Downloading from: $distributionUrl"
+verbose "Downloading to: $TMP_DOWNLOAD_DIR/$distributionUrlName"
+
+# select .zip or .tar.gz
+if ! command -v unzip >/dev/null; then
+  distributionUrl="${distributionUrl%.zip}.tar.gz"
+  distributionUrlName="${distributionUrl##*/}"
+fi
+
+# verbose opt
+__MVNW_QUIET_WGET=--quiet __MVNW_QUIET_CURL=--silent __MVNW_QUIET_UNZIP=-q __MVNW_QUIET_TAR=''
+[ "${MVNW_VERBOSE-}" != true ] || __MVNW_QUIET_WGET='' __MVNW_QUIET_CURL='' __MVNW_QUIET_UNZIP='' __MVNW_QUIET_TAR=v
+
+# normalize http auth
+case "${MVNW_PASSWORD:+has-password}" in
+'') MVNW_USERNAME='' MVNW_PASSWORD='' ;;
+has-password) [ -n "${MVNW_USERNAME-}" ] || MVNW_USERNAME='' MVNW_PASSWORD='' ;;
+esac
+
+if [ -z "${MVNW_USERNAME-}" ] && command -v wget >/dev/null; then
+  verbose "Found wget ... using wget"
+  wget ${__MVNW_QUIET_WGET:+"$__MVNW_QUIET_WGET"} "$distributionUrl" -O "$TMP_DOWNLOAD_DIR/$distributionUrlName" || die "wget: Failed to fetch $distributionUrl"
+elif [ -z "${MVNW_USERNAME-}" ] && command -v curl >/dev/null; then
+  verbose "Found curl ... using curl"
+  curl ${__MVNW_QUIET_CURL:+"$__MVNW_QUIET_CURL"} -f -L -o "$TMP_DOWNLOAD_DIR/$distributionUrlName" "$distributionUrl" || die "curl: Failed to fetch $distributionUrl"
+elif set_java_home; then
+  verbose "Falling back to use Java to download"
+  javaSource="$TMP_DOWNLOAD_DIR/Downloader.java"
+  targetZip="$TMP_DOWNLOAD_DIR/$distributionUrlName"
+  cat >"$javaSource" <<-END
+	public class Downloader extends java.net.Authenticator
+	{
+	  protected java.net.PasswordAuthentication getPasswordAuthentication()
+	  {
+	    return new java.net.PasswordAuthentication( System.getenv( "MVNW_USERNAME" ), System.getenv( "MVNW_PASSWORD" ).toCharArray() );
+	  }
+	  public static void main( String[] args ) throws Exception
+	  {
+	    setDefault( new Downloader() );
+	    java.nio.file.Files.copy( java.net.URI.create( args[0] ).toURL().openStream(), java.nio.file.Paths.get( args[1] ).toAbsolutePath().normalize() );
+	  }
+	}
+	END
+  # For Cygwin/MinGW, switch paths to Windows format before running javac and java
+  verbose " - Compiling Downloader.java ..."
+  "$(native_path "$JAVACCMD")" "$(native_path "$javaSource")" || die "Failed to compile Downloader.java"
+  verbose " - Running Downloader.java ..."
+  "$(native_path "$JAVACMD")" -cp "$(native_path "$TMP_DOWNLOAD_DIR")" Downloader "$distributionUrl" "$(native_path "$targetZip")"
+fi
+
+# If specified, validate the SHA-256 sum of the Maven distribution zip file
+if [ -n "${distributionSha256Sum-}" ]; then
+  distributionSha256Result=false
+  if [ "$MVN_CMD" = mvnd.sh ]; then
+    echo "Checksum validation is not supported for maven-mvnd." >&2
+    echo "Please disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties." >&2
+    exit 1
+  elif command -v sha256sum >/dev/null; then
+    if echo "$distributionSha256Sum  $TMP_DOWNLOAD_DIR/$distributionUrlName" | sha256sum -c - >/dev/null 2>&1; then
+      distributionSha256Result=true
+    fi
+  elif command -v shasum >/dev/null; then
+    if echo "$distributionSha256Sum  $TMP_DOWNLOAD_DIR/$distributionUrlName" | shasum -a 256 -c >/dev/null 2>&1; then
+      distributionSha256Result=true
+    fi
+  else
+    echo "Checksum validation was requested but neither 'sha256sum' or 'shasum' are available." >&2
+    echo "Please install either command, or disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties." >&2
+    exit 1
+  fi
+  if [ $distributionSha256Result = false ]; then
+    echo "Error: Failed to validate Maven distribution SHA-256, your Maven distribution might be compromised." >&2
+    echo "If you updated your Maven version, you need to update the specified distributionSha256Sum property." >&2
+    exit 1
+  fi
+fi
+
+# unzip and move
+if command -v unzip >/dev/null; then
+  unzip ${__MVNW_QUIET_UNZIP:+"$__MVNW_QUIET_UNZIP"} "$TMP_DOWNLOAD_DIR/$distributionUrlName" -d "$TMP_DOWNLOAD_DIR" || die "failed to unzip"
+else
+  tar xzf${__MVNW_QUIET_TAR:+"$__MVNW_QUIET_TAR"} "$TMP_DOWNLOAD_DIR/$distributionUrlName" -C "$TMP_DOWNLOAD_DIR" || die "failed to untar"
+fi
+
+# Find the actual extracted directory name (handles snapshots where filename != directory name)
+actualDistributionDir=""
+
+# First try the expected directory name (for regular distributions)
+if [ -d "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain" ]; then
+  if [ -f "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain/bin/$MVN_CMD" ]; then
+    actualDistributionDir="$distributionUrlNameMain"
+  fi
+fi
+
+# If not found, search for any directory with the Maven executable (for snapshots)
+if [ -z "$actualDistributionDir" ]; then
+  # enable globbing to iterate over items
+  set +f
+  for dir in "$TMP_DOWNLOAD_DIR"/*; do
+    if [ -d "$dir" ]; then
+      if [ -f "$dir/bin/$MVN_CMD" ]; then
+        actualDistributionDir="$(basename "$dir")"
+        break
+      fi
+    fi
+  done
+  set -f
+fi
+
+if [ -z "$actualDistributionDir" ]; then
+  verbose "Contents of $TMP_DOWNLOAD_DIR:"
+  verbose "$(ls -la "$TMP_DOWNLOAD_DIR")"
+  die "Could not find Maven distribution directory in extracted archive"
+fi
+
+verbose "Found extracted Maven distribution directory: $actualDistributionDir"
+printf %s\\n "$distributionUrl" >"$TMP_DOWNLOAD_DIR/$actualDistributionDir/mvnw.url"
+mv -- "$TMP_DOWNLOAD_DIR/$actualDistributionDir" "$MAVEN_HOME" || [ -d "$MAVEN_HOME" ] || die "fail to move MAVEN_HOME"
+
+clean || :
+exec_maven "$@"
diff --git a/mvnw.cmd b/mvnw.cmd
new file mode 100644
index 0000000..5761d94
--- /dev/null
+++ b/mvnw.cmd
@@ -0,0 +1,189 @@
+<# : batch portion
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    http://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Apache Maven Wrapper startup batch script, version 3.3.4
+@REM
+@REM Optional ENV vars
+@REM   MVNW_REPOURL - repo url base for downloading maven distribution
+@REM   MVNW_USERNAME/MVNW_PASSWORD - user and password for downloading maven
+@REM   MVNW_VERBOSE - true: enable verbose log; others: silence the output
+@REM ----------------------------------------------------------------------------
+
+@IF "%__MVNW_ARG0_NAME__%"=="" (SET __MVNW_ARG0_NAME__=%~nx0)
+@SET __MVNW_CMD__=
+@SET __MVNW_ERROR__=
+@SET __MVNW_PSMODULEP_SAVE=%PSModulePath%
+@SET PSModulePath=
+@FOR /F "usebackq tokens=1* delims==" %%A IN (`powershell -noprofile "& {$scriptDir='%~dp0'; $script='%__MVNW_ARG0_NAME__%'; icm -ScriptBlock ([Scriptblock]::Create((Get-Content -Raw '%~f0'))) -NoNewScope}"`) DO @(
+  IF "%%A"=="MVN_CMD" (set __MVNW_CMD__=%%B) ELSE IF "%%B"=="" (echo %%A) ELSE (echo %%A=%%B)
+)
+@SET PSModulePath=%__MVNW_PSMODULEP_SAVE%
+@SET __MVNW_PSMODULEP_SAVE=
+@SET __MVNW_ARG0_NAME__=
+@SET MVNW_USERNAME=
+@SET MVNW_PASSWORD=
+@IF NOT "%__MVNW_CMD__%"=="" ("%__MVNW_CMD__%" %*)
+@echo Cannot start maven from wrapper >&2 && exit /b 1
+@GOTO :EOF
+: end batch / begin powershell #>
+
+$ErrorActionPreference = "Stop"
+if ($env:MVNW_VERBOSE -eq "true") {
+  $VerbosePreference = "Continue"
+}
+
+# calculate distributionUrl, requires .mvn/wrapper/maven-wrapper.properties
+$distributionUrl = (Get-Content -Raw "$scriptDir/.mvn/wrapper/maven-wrapper.properties" | ConvertFrom-StringData).distributionUrl
+if (!$distributionUrl) {
+  Write-Error "cannot read distributionUrl property in $scriptDir/.mvn/wrapper/maven-wrapper.properties"
+}
+
+switch -wildcard -casesensitive ( $($distributionUrl -replace '^.*/','') ) {
+  "maven-mvnd-*" {
+    $USE_MVND = $true
+    $distributionUrl = $distributionUrl -replace '-bin\.[^.]*$',"-windows-amd64.zip"
+    $MVN_CMD = "mvnd.cmd"
+    break
+  }
+  default {
+    $USE_MVND = $false
+    $MVN_CMD = $script -replace '^mvnw','mvn'
+    break
+  }
+}
+
+# apply MVNW_REPOURL and calculate MAVEN_HOME
+# maven home pattern: ~/.m2/wrapper/dists/{apache-maven-<version>,maven-mvnd-<version>-<platform>}/<hash>
+if ($env:MVNW_REPOURL) {
+  $MVNW_REPO_PATTERN = if ($USE_MVND -eq $False) { "/org/apache/maven/" } else { "/maven/mvnd/" }
+  $distributionUrl = "$env:MVNW_REPOURL$MVNW_REPO_PATTERN$($distributionUrl -replace "^.*$MVNW_REPO_PATTERN",'')"
+}
+$distributionUrlName = $distributionUrl -replace '^.*/',''
+$distributionUrlNameMain = $distributionUrlName -replace '\.[^.]*$','' -replace '-bin$',''
+
+$MAVEN_M2_PATH = "$HOME/.m2"
+if ($env:MAVEN_USER_HOME) {
+  $MAVEN_M2_PATH = "$env:MAVEN_USER_HOME"
+}
+
+if (-not (Test-Path -Path $MAVEN_M2_PATH)) {
+    New-Item -Path $MAVEN_M2_PATH -ItemType Directory | Out-Null
+}
+
+$MAVEN_WRAPPER_DISTS = $null
+if ((Get-Item $MAVEN_M2_PATH).Target[0] -eq $null) {
+  $MAVEN_WRAPPER_DISTS = "$MAVEN_M2_PATH/wrapper/dists"
+} else {
+  $MAVEN_WRAPPER_DISTS = (Get-Item $MAVEN_M2_PATH).Target[0] + "/wrapper/dists"
+}
+
+$MAVEN_HOME_PARENT = "$MAVEN_WRAPPER_DISTS/$distributionUrlNameMain"
+$MAVEN_HOME_NAME = ([System.Security.Cryptography.SHA256]::Create().ComputeHash([byte[]][char[]]$distributionUrl) | ForEach-Object {$_.ToString("x2")}) -join ''
+$MAVEN_HOME = "$MAVEN_HOME_PARENT/$MAVEN_HOME_NAME"
+
+if (Test-Path -Path "$MAVEN_HOME" -PathType Container) {
+  Write-Verbose "found existing MAVEN_HOME at $MAVEN_HOME"
+  Write-Output "MVN_CMD=$MAVEN_HOME/bin/$MVN_CMD"
+  exit $?
+}
+
+if (! $distributionUrlNameMain -or ($distributionUrlName -eq $distributionUrlNameMain)) {
+  Write-Error "distributionUrl is not valid, must end with *-bin.zip, but found $distributionUrl"
+}
+
+# prepare tmp dir
+$TMP_DOWNLOAD_DIR_HOLDER = New-TemporaryFile
+$TMP_DOWNLOAD_DIR = New-Item -Itemtype Directory -Path "$TMP_DOWNLOAD_DIR_HOLDER.dir"
+$TMP_DOWNLOAD_DIR_HOLDER.Delete() | Out-Null
+trap {
+  if ($TMP_DOWNLOAD_DIR.Exists) {
+    try { Remove-Item $TMP_DOWNLOAD_DIR -Recurse -Force | Out-Null }
+    catch { Write-Warning "Cannot remove $TMP_DOWNLOAD_DIR" }
+  }
+}
+
+New-Item -Itemtype Directory -Path "$MAVEN_HOME_PARENT" -Force | Out-Null
+
+# Download and Install Apache Maven
+Write-Verbose "Couldn't find MAVEN_HOME, downloading and installing it ..."
+Write-Verbose "Downloading from: $distributionUrl"
+Write-Verbose "Downloading to: $TMP_DOWNLOAD_DIR/$distributionUrlName"
+
+$webclient = New-Object System.Net.WebClient
+if ($env:MVNW_USERNAME -and $env:MVNW_PASSWORD) {
+  $webclient.Credentials = New-Object System.Net.NetworkCredential($env:MVNW_USERNAME, $env:MVNW_PASSWORD)
+}
+[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
+$webclient.DownloadFile($distributionUrl, "$TMP_DOWNLOAD_DIR/$distributionUrlName") | Out-Null
+
+# If specified, validate the SHA-256 sum of the Maven distribution zip file
+$distributionSha256Sum = (Get-Content -Raw "$scriptDir/.mvn/wrapper/maven-wrapper.properties" | ConvertFrom-StringData).distributionSha256Sum
+if ($distributionSha256Sum) {
+  if ($USE_MVND) {
+    Write-Error "Checksum validation is not supported for maven-mvnd. `nPlease disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties."
+  }
+  Import-Module $PSHOME\Modules\Microsoft.PowerShell.Utility -Function Get-FileHash
+  if ((Get-FileHash "$TMP_DOWNLOAD_DIR/$distributionUrlName" -Algorithm SHA256).Hash.ToLower() -ne $distributionSha256Sum) {
+    Write-Error "Error: Failed to validate Maven distribution SHA-256, your Maven distribution might be compromised. If you updated your Maven version, you need to update the specified distributionSha256Sum property."
+  }
+}
+
+# unzip and move
+Expand-Archive "$TMP_DOWNLOAD_DIR/$distributionUrlName" -DestinationPath "$TMP_DOWNLOAD_DIR" | Out-Null
+
+# Find the actual extracted directory name (handles snapshots where filename != directory name)
+$actualDistributionDir = ""
+
+# First try the expected directory name (for regular distributions)
+$expectedPath = Join-Path "$TMP_DOWNLOAD_DIR" "$distributionUrlNameMain"
+$expectedMvnPath = Join-Path "$expectedPath" "bin/$MVN_CMD"
+if ((Test-Path -Path $expectedPath -PathType Container) -and (Test-Path -Path $expectedMvnPath -PathType Leaf)) {
+  $actualDistributionDir = $distributionUrlNameMain
+}
+
+# If not found, search for any directory with the Maven executable (for snapshots)
+if (!$actualDistributionDir) {
+  Get-ChildItem -Path "$TMP_DOWNLOAD_DIR" -Directory | ForEach-Object {
+    $testPath = Join-Path $_.FullName "bin/$MVN_CMD"
+    if (Test-Path -Path $testPath -PathType Leaf) {
+      $actualDistributionDir = $_.Name
+    }
+  }
+}
+
+if (!$actualDistributionDir) {
+  Write-Error "Could not find Maven distribution directory in extracted archive"
+}
+
+Write-Verbose "Found extracted Maven distribution directory: $actualDistributionDir"
+Rename-Item -Path "$TMP_DOWNLOAD_DIR/$actualDistributionDir" -NewName $MAVEN_HOME_NAME | Out-Null
+try {
+  Move-Item -Path "$TMP_DOWNLOAD_DIR/$MAVEN_HOME_NAME" -Destination $MAVEN_HOME_PARENT | Out-Null
+} catch {
+  if (! (Test-Path -Path "$MAVEN_HOME" -PathType Container)) {
+    Write-Error "fail to move MAVEN_HOME"
+  }
+} finally {
+  try { Remove-Item $TMP_DOWNLOAD_DIR -Recurse -Force | Out-Null }
+  catch { Write-Warning "Cannot remove $TMP_DOWNLOAD_DIR" }
+}
+
+Write-Output "MVN_CMD=$MAVEN_HOME/bin/$MVN_CMD"
diff --git a/pom.xml b/pom.xml
new file mode 100644
index 0000000..74943b7
--- /dev/null
+++ b/pom.xml
@@ -0,0 +1,400 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>br.com.cybercore.signer</groupId>
+    <artifactId>cybercore-signer-parent</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <packaging>pom</packaging>
+
+    <name>CyberCore Signer</name>
+    <description>Agente desktop de assinatura digital (A1/A3) para aplicações web autorizadas.</description>
+    <url>https://cybercore.com.br</url>
+    <inceptionYear>2026</inceptionYear>
+
+    <organization>
+        <name>CyberCore</name>
+        <url>https://cybercore.com.br</url>
+    </organization>
+
+    <licenses>
+        <license>
+            <name>Proprietária - CyberCore. Todos os direitos reservados.</name>
+            <distribution>manual</distribution>
+        </license>
+    </licenses>
+
+    <modules>
+        <module>modules/cybercore-core</module>
+        <module>modules/cybercore-ui</module>
+        <module>modules/cybercore-app</module>
+    </modules>
+
+    <properties>
+        <!-- Plataforma -->
+        <java.release>25</java.release>
+        <maven.compiler.release>${java.release}</maven.compiler.release>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <!-- Builds reprodutíveis: atualizado no release -->
+        <project.build.outputTimestamp>2026-10-08T00:00:00Z</project.build.outputTimestamp>
+
+        <!-- Produto -->
+        <cybercore.product.name>CyberCore Signer</cybercore.product.name>
+        <cybercore.protocol.version>1</cybercore.protocol.version>
+        <!--
+            Sabor do build. "production" por padrão (seguro).
+            O perfil "dev" altera para "development", único caso em que o modo
+            DESENVOLVIMENTO pode ser ativado em tempo de execução (flag dash-dash-dev).
+        -->
+        <cybercore.build.flavor>production</cybercore.build.flavor>
+
+        <!-- Dependências -->
+        <javafx.version>25.0.4</javafx.version>
+        <slf4j.version>2.0.20</slf4j.version>
+        <logback.version>1.5.18</logback.version>
+        <junit.version>6.1.3</junit.version>
+        <assertj.version>3.27.7</assertj.version>
+        <mockito.version>5.24.0</mockito.version>
+        <archunit.version>1.5.1</archunit.version>
+        <jackson.version>2.18.2</jackson.version>
+        <pdfbox.version>3.0.4</pdfbox.version>
+        <bouncycastle.version>1.80</bouncycastle.version>
+
+        <!-- Plugins -->
+        <maven-clean-plugin.version>3.5.0</maven-clean-plugin.version>
+        <maven-resources-plugin.version>3.5.0</maven-resources-plugin.version>
+        <maven-compiler-plugin.version>3.15.0</maven-compiler-plugin.version>
+        <maven-surefire-plugin.version>3.5.6</maven-surefire-plugin.version>
+        <maven-jar-plugin.version>3.5.1</maven-jar-plugin.version>
+        <maven-install-plugin.version>3.2.0</maven-install-plugin.version>
+        <maven-deploy-plugin.version>3.2.0</maven-deploy-plugin.version>
+        <maven-site-plugin.version>3.22.0</maven-site-plugin.version>
+        <maven-enforcer-plugin.version>3.6.3</maven-enforcer-plugin.version>
+        <maven-dependency-plugin.version>3.11.0</maven-dependency-plugin.version>
+        <maven-wrapper-plugin.version>3.3.4</maven-wrapper-plugin.version>
+        <jacoco-maven-plugin.version>0.8.15</jacoco-maven-plugin.version>
+        <spotbugs-maven-plugin.version>4.10.4.1</spotbugs-maven-plugin.version>
+        <findsecbugs-plugin.version>1.14.0</findsecbugs-plugin.version>
+        <javafx-maven-plugin.version>0.0.8</javafx-maven-plugin.version>
+
+        <!-- Qualidade -->
+        <spotbugs.skip>false</spotbugs.skip>
+        <jacoco.skip>false</jacoco.skip>
+    </properties>
+
+    <dependencyManagement>
+        <dependencies>
+            <!-- Módulos internos -->
+            <dependency>
+                <groupId>br.com.cybercore.signer</groupId>
+                <artifactId>cybercore-core</artifactId>
+                <version>${project.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>br.com.cybercore.signer</groupId>
+                <artifactId>cybercore-ui</artifactId>
+                <version>${project.version}</version>
+            </dependency>
+
+            <!-- JavaFX -->
+            <dependency>
+                <groupId>org.openjfx</groupId>
+                <artifactId>javafx-base</artifactId>
+                <version>${javafx.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.openjfx</groupId>
+                <artifactId>javafx-graphics</artifactId>
+                <version>${javafx.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.openjfx</groupId>
+                <artifactId>javafx-controls</artifactId>
+                <version>${javafx.version}</version>
+            </dependency>
+
+            <!-- Logging -->
+            <dependency>
+                <groupId>org.slf4j</groupId>
+                <artifactId>slf4j-api</artifactId>
+                <version>${slf4j.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>ch.qos.logback</groupId>
+                <artifactId>logback-classic</artifactId>
+                <version>${logback.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>ch.qos.logback</groupId>
+                <artifactId>logback-core</artifactId>
+                <version>${logback.version}</version>
+            </dependency>
+
+            <!-- Testes -->
+            <dependency>
+                <groupId>org.junit</groupId>
+                <artifactId>junit-bom</artifactId>
+                <version>${junit.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+            <dependency>
+                <groupId>org.assertj</groupId>
+                <artifactId>assertj-core</artifactId>
+                <version>${assertj.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.mockito</groupId>
+                <artifactId>mockito-core</artifactId>
+                <version>${mockito.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>com.tngtech.archunit</groupId>
+                <artifactId>archunit-junit5</artifactId>
+                <version>${archunit.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>com.fasterxml.jackson</groupId>
+                <artifactId>jackson-bom</artifactId>
+                <version>${jackson.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+
+            <!-- Manipulação e Assinatura de PDF (PAdES) e CMS -->
+            <dependency>
+                <groupId>org.apache.pdfbox</groupId>
+                <artifactId>pdfbox</artifactId>
+                <version>${pdfbox.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.bouncycastle</groupId>
+                <artifactId>bcpkix-jdk18on</artifactId>
+                <version>${bouncycastle.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.bouncycastle</groupId>
+                <artifactId>bcprov-jdk18on</artifactId>
+                <version>${bouncycastle.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.bouncycastle</groupId>
+                <artifactId>bcutil-jdk18on</artifactId>
+                <version>${bouncycastle.version}</version>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <!-- Dependências de teste comuns a todos os módulos -->
+    <dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <pluginManagement>
+            <plugins>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-clean-plugin</artifactId>
+                    <version>${maven-clean-plugin.version}</version>
+                </plugin>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-resources-plugin</artifactId>
+                    <version>${maven-resources-plugin.version}</version>
+                    <configuration>
+                        <propertiesEncoding>UTF-8</propertiesEncoding>
+                    </configuration>
+                </plugin>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-compiler-plugin</artifactId>
+                    <version>${maven-compiler-plugin.version}</version>
+                    <configuration>
+                        <release>${java.release}</release>
+                        <showWarnings>true</showWarnings>
+                        <failOnWarning>true</failOnWarning>
+                        <compilerArgs>
+                            <arg>-Xlint:all,-processing,-requires-automatic</arg>
+                            <arg>-parameters</arg>
+                        </compilerArgs>
+                    </configuration>
+                </plugin>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-surefire-plugin</artifactId>
+                    <version>${maven-surefire-plugin.version}</version>
+                    <configuration>
+                        <!-- @{argLine} é preenchido pelo JaCoCo -->
+                        <argLine>@{argLine} -Dfile.encoding=UTF-8</argLine>
+                        <trimStackTrace>false</trimStackTrace>
+                    </configuration>
+                </plugin>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-jar-plugin</artifactId>
+                    <version>${maven-jar-plugin.version}</version>
+                    <configuration>
+                        <archive>
+                            <manifest>
+                                <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
+                            </manifest>
+                            <manifestEntries>
+                                <Implementation-Vendor>CyberCore</Implementation-Vendor>
+                            </manifestEntries>
+                        </archive>
+                    </configuration>
+                </plugin>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-install-plugin</artifactId>
+                    <version>${maven-install-plugin.version}</version>
+                </plugin>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-deploy-plugin</artifactId>
+                    <version>${maven-deploy-plugin.version}</version>
+                </plugin>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-site-plugin</artifactId>
+                    <version>${maven-site-plugin.version}</version>
+                </plugin>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-dependency-plugin</artifactId>
+                    <version>${maven-dependency-plugin.version}</version>
+                </plugin>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-wrapper-plugin</artifactId>
+                    <version>${maven-wrapper-plugin.version}</version>
+                </plugin>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-enforcer-plugin</artifactId>
+                    <version>${maven-enforcer-plugin.version}</version>
+                </plugin>
+                <plugin>
+                    <groupId>org.jacoco</groupId>
+                    <artifactId>jacoco-maven-plugin</artifactId>
+                    <version>${jacoco-maven-plugin.version}</version>
+                </plugin>
+                <plugin>
+                    <groupId>com.github.spotbugs</groupId>
+                    <artifactId>spotbugs-maven-plugin</artifactId>
+                    <version>${spotbugs-maven-plugin.version}</version>
+                    <configuration>
+                        <effort>Max</effort>
+                        <threshold>Medium</threshold>
+                        <failOnError>true</failOnError>
+                        <excludeFilterFile>${maven.multiModuleProjectDirectory}/config/spotbugs/exclude.xml</excludeFilterFile>
+                        <plugins>
+                            <plugin>
+                                <groupId>com.h3xstream.findsecbugs</groupId>
+                                <artifactId>findsecbugs-plugin</artifactId>
+                                <version>${findsecbugs-plugin.version}</version>
+                            </plugin>
+                        </plugins>
+                    </configuration>
+                </plugin>
+                <plugin>
+                    <groupId>org.openjfx</groupId>
+                    <artifactId>javafx-maven-plugin</artifactId>
+                    <version>${javafx-maven-plugin.version}</version>
+                </plugin>
+            </plugins>
+        </pluginManagement>
+
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-enforcer-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>enforce-build-environment</id>
+                        <goals>
+                            <goal>enforce</goal>
+                        </goals>
+                        <configuration>
+                            <rules>
+                                <requireJavaVersion>
+                                    <version>[25,)</version>
+                                    <message>CyberCore Signer exige JDK 25 LTS ou superior.</message>
+                                </requireJavaVersion>
+                                <requireMavenVersion>
+                                    <version>[3.9.0,)</version>
+                                </requireMavenVersion>
+                                <dependencyConvergence/>
+                                <banDuplicatePomDependencyVersions/>
+                                <requirePluginVersions/>
+                            </rules>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.jacoco</groupId>
+                <artifactId>jacoco-maven-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>prepare-agent</id>
+                        <goals>
+                            <goal>prepare-agent</goal>
+                        </goals>
+                    </execution>
+                    <execution>
+                        <id>report</id>
+                        <phase>verify</phase>
+                        <goals>
+                            <goal>report</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>com.github.spotbugs</groupId>
+                <artifactId>spotbugs-maven-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>spotbugs-check</id>
+                        <phase>verify</phase>
+                        <goals>
+                            <goal>check</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <profiles>
+        <profile>
+            <!-- Build de DESENVOLVIMENTO: habilita o modo dev (flag dash-dash-dev). Nunca usar em releases. -->
+            <id>dev</id>
+            <properties>
+                <cybercore.build.flavor>development</cybercore.build.flavor>
+            </properties>
+        </profile>
+        <profile>
+            <!-- Execução rápida local: pula análise estática e cobertura -->
+            <id>fast</id>
+            <properties>
+                <spotbugs.skip>true</spotbugs.skip>
+                <jacoco.skip>true</jacoco.skip>
+            </properties>
+        </profile>
+    </profiles>
+</project>
diff --git a/run.bat b/run.bat
new file mode 100644
index 0000000..3fa10df
--- /dev/null
+++ b/run.bat
@@ -0,0 +1,18 @@
+@echo off
+REM ==============================================================================
+REM CyberCore Signer — Inicializador Rápido Desktop para Windows
+REM ==============================================================================
+
+set SCRIPT_DIR=%~dp0
+cd /d "%SCRIPT_DIR%"
+
+if exist "cybercore-signer.jar" (
+    echo Iniciando CyberCore Signer...
+    start javaw -jar cybercore-signer.jar %*
+) else if exist "dist\cybercore-signer.jar" (
+    echo Iniciando CyberCore Signer...
+    start javaw -jar dist\cybercore-signer.jar %*
+) else (
+    echo ERRO: Arquivo cybercore-signer.jar nao encontrado!
+    pause
+)
diff --git a/run.sh b/run.sh
new file mode 100755
index 0000000..8a62bd0
--- /dev/null
+++ b/run.sh
@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+# ==============================================================================
+# CyberCore Signer — Inicializador Rápido Desktop
+# ==============================================================================
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+cd "${SCRIPT_DIR}"
+
+if [ -f "dist/CyberCore-Signer/bin/CyberCore-Signer" ]; then
+    echo "==> Iniciando CyberCore Signer via binário nativo autocontido..."
+    exec "dist/CyberCore-Signer/bin/CyberCore-Signer" "$@"
+elif [ -f "cybercore-signer.jar" ]; then
+    echo "==> Iniciando CyberCore Signer via JAR executável..."
+    if [ -n "${JAVA_HOME:-}" ]; then
+        exec "${JAVA_HOME}/bin/java" -jar cybercore-signer.jar "$@"
+    else
+        exec java -jar cybercore-signer.jar "$@"
+    fi
+else
+    echo "ERRO: Pacote executável não encontrado. Execute primeiro: bash scripts/package-jpackage.sh"
+    exit 1
+fi
diff --git a/scratch/GeneratePngAssets.java b/scratch/GeneratePngAssets.java
new file mode 100644
index 0000000..abcc4b3
--- /dev/null
+++ b/scratch/GeneratePngAssets.java
@@ -0,0 +1,348 @@
+import java.awt.*;
+import java.awt.geom.*;
+import java.awt.image.BufferedImage;
+import java.io.File;
+import javax.imageio.ImageIO;
+
+public class GeneratePngAssets {
+
+    public static void main(String[] args) throws Exception {
+        File outDir = new File("assets/images");
+        outDir.mkdirs();
+
+        generateAppIcon(new File(outDir, "app-icon.png"), 256);
+        generateAppLogo(new File(outDir, "app-logo.png"), 480, 120);
+        generateBrandBanner(new File(outDir, "brand-banner.png"), 600, 160);
+        generateDefaultSeal(new File(outDir, "default-seal.png"), 640, 164);
+
+        System.out.println("Imagens PNG geradas com sucesso em assets/images/");
+    }
+
+    private static void setupHints(Graphics2D g2) {
+        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
+        g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
+        g2.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
+        g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
+    }
+
+    /**
+     * Gera app-icon.png (Ícone de alta fidelidade com Cristal / Diamante Azul Serpro 3D)
+     */
+    private static void generateAppIcon(File file, int size) throws Exception {
+        BufferedImage img = new BufferedImage(size, size, BufferedImage.TYPE_INT_ARGB);
+        Graphics2D g2 = img.createGraphics();
+        setupHints(g2);
+
+        // Fundo com cantos arredondados e gradiente azul profundo
+        double arc = size * 0.28;
+        RoundRectangle2D bg = new RoundRectangle2D.Double(8, 8, size - 16, size - 16, arc, arc);
+
+        Paint bgPaint = new LinearGradientPaint(
+                0, 0, size, size,
+                new float[]{0.0f, 0.45f, 1.0f},
+                new Color[]{new Color(0x1976d2), new Color(0x0d47a1), new Color(0x01579b)}
+        );
+        g2.setPaint(bgPaint);
+        g2.fill(bg);
+
+        // Borda sutil de brilho interno
+        g2.setColor(new Color(255, 255, 255, 60));
+        g2.setStroke(new BasicStroke(size * 0.015f));
+        g2.draw(new RoundRectangle2D.Double(10, 10, size - 20, size - 20, arc - 4, arc - 4));
+
+        // Facetas cristalinas em 3D
+        double s = size;
+        Path2D topFacet = new Path2D.Double();
+        topFacet.moveTo(s * 0.50, s * 0.18);
+        topFacet.lineTo(s * 0.82, s * 0.44);
+        topFacet.lineTo(s * 0.50, s * 0.56);
+        topFacet.lineTo(s * 0.18, s * 0.44);
+        topFacet.closePath();
+
+        Paint topPaint = new LinearGradientPaint(
+                (float)(s * 0.5), (float)(s * 0.18), (float)(s * 0.5), (float)(s * 0.56),
+                new float[]{0.0f, 1.0f},
+                new Color[]{new Color(255, 255, 255, 230), new Color(128, 216, 255, 140)}
+        );
+        g2.setPaint(topPaint);
+        g2.fill(topFacet);
+
+        Path2D leftFacet = new Path2D.Double();
+        leftFacet.moveTo(s * 0.18, s * 0.44);
+        leftFacet.lineTo(s * 0.50, s * 0.56);
+        leftFacet.lineTo(s * 0.50, s * 0.84);
+        leftFacet.lineTo(s * 0.28, s * 0.70);
+        leftFacet.closePath();
+
+        Paint leftPaint = new LinearGradientPaint(
+                (float)(s * 0.18), (float)(s * 0.44), (float)(s * 0.50), (float)(s * 0.84),
+                new float[]{0.0f, 1.0f},
+                new Color[]{new Color(64, 196, 255, 180), new Color(2, 136, 209, 90)}
+        );
+        g2.setPaint(leftPaint);
+        g2.fill(leftFacet);
+
+        Path2D rightFacet = new Path2D.Double();
+        rightFacet.moveTo(s * 0.82, s * 0.44);
+        rightFacet.lineTo(s * 0.50, s * 0.56);
+        rightFacet.lineTo(s * 0.50, s * 0.84);
+        rightFacet.lineTo(s * 0.72, s * 0.70);
+        rightFacet.closePath();
+
+        Paint rightPaint = new LinearGradientPaint(
+                (float)(s * 0.82), (float)(s * 0.44), (float)(s * 0.50), (float)(s * 0.84),
+                new float[]{0.0f, 1.0f},
+                new Color[]{new Color(225, 245, 254, 210), new Color(41, 182, 246, 120)}
+        );
+        g2.setPaint(rightPaint);
+        g2.fill(rightFacet);
+
+        // Brilho estelar central
+        RadialGradientPaint glow = new RadialGradientPaint(
+                (float)(s * 0.5), (float)(s * 0.5), (float)(s * 0.16),
+                new float[]{0.0f, 1.0f},
+                new Color[]{new Color(255, 255, 255, 240), new Color(255, 255, 255, 0)}
+        );
+        g2.setPaint(glow);
+        g2.fill(new Ellipse2D.Double(s * 0.34, s * 0.34, s * 0.32, s * 0.32));
+
+        g2.dispose();
+        ImageIO.write(img, "PNG", file);
+    }
+
+    /**
+     * Gera app-logo.png (Logotipo Horizontal com Cristal + Texto CyberCore SIGNER)
+     */
+    private static void generateAppLogo(File file, int width, int height) throws Exception {
+        BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
+        Graphics2D g2 = img.createGraphics();
+        setupHints(g2);
+
+        // Ícone cristal no canto esquerdo
+        int iconSize = 88;
+        int iconX = 14;
+        int iconY = 16;
+
+        RoundRectangle2D bg = new RoundRectangle2D.Double(iconX, iconY, iconSize, iconSize, 24, 24);
+        Paint bgPaint = new LinearGradientPaint(
+                iconX, iconY, iconX + iconSize, iconY + iconSize,
+                new float[]{0.0f, 0.5f, 1.0f},
+                new Color[]{new Color(0x1976d2), new Color(0x0d47a1), new Color(0x01579b)}
+        );
+        g2.setPaint(bgPaint);
+        g2.fill(bg);
+
+        // Cristal no ícone
+        double cx = iconX + iconSize * 0.5;
+        double cy = iconY + iconSize * 0.5;
+        double sz = iconSize * 0.72;
+
+        Path2D topFacet = new Path2D.Double();
+        topFacet.moveTo(cx, cy - sz * 0.45);
+        topFacet.lineTo(cx + sz * 0.45, cy - sz * 0.08);
+        topFacet.lineTo(cx, cy + sz * 0.1);
+        topFacet.lineTo(cx - sz * 0.45, cy - sz * 0.08);
+        topFacet.closePath();
+        g2.setPaint(new Color(255, 255, 255, 220));
+        g2.fill(topFacet);
+
+        Path2D botFacet = new Path2D.Double();
+        botFacet.moveTo(cx - sz * 0.45, cy - sz * 0.08);
+        botFacet.lineTo(cx, cy + sz * 0.1);
+        botFacet.lineTo(cx, cy + sz * 0.50);
+        botFacet.lineTo(cx - sz * 0.30, cy + sz * 0.30);
+        botFacet.closePath();
+        g2.setPaint(new Color(64, 196, 255, 180));
+        g2.fill(botFacet);
+
+        Path2D rightFacet = new Path2D.Double();
+        rightFacet.moveTo(cx + sz * 0.45, cy - sz * 0.08);
+        rightFacet.lineTo(cx, cy + sz * 0.1);
+        rightFacet.lineTo(cx, cy + sz * 0.50);
+        rightFacet.lineTo(cx + sz * 0.30, cy + sz * 0.30);
+        rightFacet.closePath();
+        g2.setPaint(new Color(225, 245, 254, 220));
+        g2.fill(rightFacet);
+
+        // Tipografia
+        int textX = iconX + iconSize + 22;
+
+        // "CyberCore"
+        g2.setFont(new Font("Segoe UI", Font.BOLD, 42));
+        g2.setColor(new Color(0x0a2540));
+        g2.drawString("Cyber", textX, 62);
+        int cyberWidth = g2.getFontMetrics().stringWidth("Cyber");
+        g2.setColor(new Color(0x0288d1));
+        g2.drawString("Core", textX + cyberWidth, 62);
+
+        // Badge "SIGNER"
+        int badgeX = textX;
+        int badgeY = 74;
+        int badgeW = 100;
+        int badgeH = 24;
+        g2.setColor(new Color(0x0288d1));
+        g2.fill(new RoundRectangle2D.Double(badgeX, badgeY, badgeW, badgeH, 6, 6));
+
+        g2.setFont(new Font("Segoe UI", Font.BOLD, 14));
+        g2.setColor(Color.WHITE);
+        g2.drawString("SIGNER", badgeX + 22, badgeY + 17);
+
+        // Subtítulo
+        g2.setFont(new Font("Segoe UI", Font.PLAIN, 13));
+        g2.setColor(new Color(0x64748b));
+        g2.drawString("ICP-Brasil • Assinador Digital Seguro", badgeX + badgeW + 12, badgeY + 17);
+
+        g2.dispose();
+        ImageIO.write(img, "PNG", file);
+    }
+
+    /**
+     * Gera brand-banner.png (Banner institucional de cabeçalho e documentação)
+     */
+    private static void generateBrandBanner(File file, int width, int height) throws Exception {
+        BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
+        Graphics2D g2 = img.createGraphics();
+        setupHints(g2);
+
+        // Fundo com cantos arredondados e gradiente moderno Serpro Blue
+        RoundRectangle2D rect = new RoundRectangle2D.Double(0, 0, width, height, 16, 16);
+        Paint grad = new LinearGradientPaint(
+                0, 0, width, height,
+                new float[]{0.0f, 0.6f, 1.0f},
+                new Color[]{new Color(0x0d47a1), new Color(0x0284c7), new Color(0x0369a1)}
+        );
+        g2.setPaint(grad);
+        g2.fill(rect);
+
+        // Elementos gráficos decorativos de fundo
+        g2.setColor(new Color(255, 255, 255, 25));
+        g2.fill(new Ellipse2D.Double(width - 180, -40, 220, 220));
+        g2.fill(new Ellipse2D.Double(width - 90, 60, 160, 160));
+
+        // Cristal no canto esquerdo
+        int iconSize = 90;
+        int iconX = 30;
+        int iconY = 35;
+
+        RoundRectangle2D iconBg = new RoundRectangle2D.Double(iconX, iconY, iconSize, iconSize, 22, 22);
+        g2.setPaint(new LinearGradientPaint(
+                iconX, iconY, iconX + iconSize, iconY + iconSize,
+                new float[]{0.0f, 1.0f},
+                new Color[]{new Color(0x1e88e5), new Color(0x01579b)}
+        ));
+        g2.fill(iconBg);
+
+        // Detalhe de luz no ícone
+        g2.setColor(Color.WHITE);
+        g2.setStroke(new BasicStroke(2f));
+        g2.draw(new RoundRectangle2D.Double(iconX + 3, iconY + 3, iconSize - 6, iconSize - 6, 18, 18));
+
+        // Diamante interno
+        double cx = iconX + iconSize * 0.5;
+        double cy = iconY + iconSize * 0.5;
+        Path2D diamond = new Path2D.Double();
+        diamond.moveTo(cx, cy - 28);
+        diamond.lineTo(cx + 26, cy);
+        diamond.lineTo(cx, cy + 28);
+        diamond.lineTo(cx - 26, cy);
+        diamond.closePath();
+        g2.setPaint(new Color(255, 255, 255, 220));
+        g2.fill(diamond);
+
+        // Textos no Banner
+        int textX = iconX + iconSize + 28;
+        g2.setFont(new Font("Segoe UI", Font.BOLD, 36));
+        g2.setColor(Color.WHITE);
+        g2.drawString("CyberCore Signer", textX, 74);
+
+        g2.setFont(new Font("Segoe UI", Font.PLAIN, 16));
+        g2.setColor(new Color(0xe0f2fe));
+        g2.drawString("Agente de Assinatura Digital ICP-Brasil A1 & A3", textX, 104);
+
+        g2.setFont(new Font("Segoe UI", Font.BOLD, 12));
+        g2.setColor(new Color(0x38bdf8));
+        g2.drawString("PADES • XADES • CADES • TIMESTAMPS • CCSP/1", textX, 128);
+
+        g2.dispose();
+        ImageIO.write(img, "PNG", file);
+    }
+
+    /**
+     * Gera default-seal.png (Selo de Assinatura Digital Elegante com Brasão e Textos)
+     */
+    private static void generateDefaultSeal(File file, int width, int height) throws Exception {
+        BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
+        Graphics2D g2 = img.createGraphics();
+        setupHints(g2);
+
+        // Fundo do selo com leve transparência e borda azul
+        RoundRectangle2D sealBox = new RoundRectangle2D.Double(2, 2, width - 4, height - 4, 12, 12);
+        g2.setColor(new Color(248, 250, 252, 245));
+        g2.fill(sealBox);
+
+        g2.setColor(new Color(0x0288d1));
+        g2.setStroke(new BasicStroke(2.5f));
+        g2.draw(sealBox);
+
+        // Brasão Notarial no lado esquerdo
+        int badgeX = 18;
+        int badgeY = 16;
+        int badgeW = 130;
+        int badgeH = height - 32;
+
+        RoundRectangle2D badgeBg = new RoundRectangle2D.Double(badgeX, badgeY, badgeW, badgeH, 10, 10);
+        g2.setPaint(new LinearGradientPaint(
+                badgeX, badgeY, badgeX, badgeY + badgeH,
+                new float[]{0.0f, 1.0f},
+                new Color[]{new Color(0x0288d1), new Color(0x01579b)}
+        ));
+        g2.fill(badgeBg);
+
+        // Escudo e Estrela no Brasão
+        g2.setColor(Color.WHITE);
+        g2.setFont(new Font("Segoe UI", Font.BOLD, 13));
+        g2.drawString("ASSINADO", badgeX + 28, badgeY + 40);
+        g2.drawString("DIGITALMENTE", badgeX + 16, badgeY + 58);
+
+        // Estrela dourada
+        g2.setColor(new Color(0xfbbf24));
+        g2.fill(new Ellipse2D.Double(badgeX + badgeW * 0.5 - 12, badgeY + 74, 24, 24));
+        g2.setColor(Color.WHITE);
+        g2.setFont(new Font("Segoe UI", Font.BOLD, 16));
+        g2.drawString("★", (int)(badgeX + badgeW * 0.5 - 7), badgeY + 92);
+
+        g2.setFont(new Font("Segoe UI", Font.PLAIN, 10));
+        g2.setColor(new Color(0xe0f2fe));
+        g2.drawString("ICP-BRASIL", badgeX + 34, badgeY + 118);
+
+        // Linha divisória vertical
+        int divX = badgeX + badgeW + 18;
+        g2.setColor(new Color(0xcfd8dc));
+        g2.setStroke(new BasicStroke(1.5f));
+        g2.drawLine(divX, 16, divX, height - 16);
+
+        // Área textual de informações da assinatura
+        int textX = divX + 18;
+
+        g2.setColor(new Color(0x64748b));
+        g2.setFont(new Font("Segoe UI", Font.BOLD, 11));
+        g2.drawString("DOCUMENTO ASSINADO DIGITALMENTE POR:", textX, 36);
+
+        g2.setColor(new Color(0x0a2540));
+        g2.setFont(new Font("Segoe UI", Font.BOLD, 18));
+        g2.drawString("JOÃO DA SILVA SAUDÁVEL", textX, 60);
+
+        g2.setColor(new Color(0x334155));
+        g2.setFont(new Font("Segoe UI", Font.PLAIN, 12));
+        g2.drawString("CPF: ***.456.789-**", textX, 82);
+        g2.drawString("Data e Hora: 09/10/2026 20:30:00 -03:00", textX, 102);
+
+        // Rodapé de autenticação
+        g2.setColor(new Color(0x0288d1));
+        g2.setFont(new Font("Segoe UI", Font.ITALIC, 11));
+        g2.drawString("A conformidade com a ICP-Brasil pode ser verificada no ITI.", textX, 128);
+
+        g2.dispose();
+        ImageIO.write(img, "PNG", file);
+    }
+}
diff --git a/scripts/package-jpackage.sh b/scripts/package-jpackage.sh
new file mode 100755
index 0000000..f4d7530
--- /dev/null
+++ b/scripts/package-jpackage.sh
@@ -0,0 +1,69 @@
+#!/usr/bin/env bash
+# ==============================================================================
+# CyberCore Signer — Script de Empacotamento Nativo com jpackage
+# Gera runtime autocontido e instalador sem exigir Java instalado pelo usuário.
+# ==============================================================================
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
+
+echo "==> [1/3] Compilando projeto e gerando Fat JAR via Maven..."
+cd "${PROJECT_ROOT}"
+
+if [ -n "${JAVA_HOME:-}" ]; then
+  MVN_CMD="${PROJECT_ROOT}/mvnw"
+else
+  export JAVA_HOME="/home/claudecio/.jdks/jdk-25.0.4.1+1"
+  export PATH="${JAVA_HOME}/bin:${PATH}"
+  MVN_CMD="${PROJECT_ROOT}/mvnw"
+fi
+
+${MVN_CMD} clean package -DskipTests
+
+if [ -f "${PROJECT_ROOT}/modules/cybercore-app/target/cybercore-app-0.1.0-SNAPSHOT-shaded.jar" ]; then
+  cp "${PROJECT_ROOT}/modules/cybercore-app/target/cybercore-app-0.1.0-SNAPSHOT-shaded.jar" "${PROJECT_ROOT}/modules/cybercore-app/target/cybercore-signer.jar"
+fi
+
+FAT_JAR="${PROJECT_ROOT}/modules/cybercore-app/target/cybercore-signer.jar"
+if [ ! -f "${FAT_JAR}" ]; then
+  echo "ERRO: JAR final não encontrado em ${FAT_JAR}"
+  exit 1
+fi
+
+DIST_DIR="${PROJECT_ROOT}/dist"
+mkdir -p "${DIST_DIR}"
+
+APP_VERSION="0.1.0"
+APP_NAME="CyberCore-Signer"
+
+echo "==> [2/3] Verificando ferramenta jpackage..."
+JPACKAGE="${JAVA_HOME}/bin/jpackage"
+if [ ! -x "${JPACKAGE}" ]; then
+  echo "ERRO: jpackage não encontrado em ${JPACKAGE}"
+  exit 1
+fi
+
+echo "==> [3/3] Executando jpackage para criar imagem de aplicação nativa com runtime próprio..."
+# No ambiente Linux em CI ou desenvolvimento, gera app-image nativa.
+# Em runners Windows, substitua o tipo por 'msi' ou 'exe'.
+TARGET_TYPE="app-image"
+if [[ "$OSTYPE" == "msys" || "$OSTYPE" == "win32" ]]; then
+  TARGET_TYPE="msi"
+fi
+
+"${JPACKAGE}" \
+  --name "${APP_NAME}" \
+  --app-version "${APP_VERSION}" \
+  --input "${PROJECT_ROOT}/modules/cybercore-app/target" \
+  --main-jar "cybercore-signer.jar" \
+  --main-class "br.com.cybercore.signer.app.CyberCoreSignerApplication" \
+  --type "${TARGET_TYPE}" \
+  --dest "${DIST_DIR}" \
+  --java-options "-Xms64m -Xmx256m --enable-native-access=ALL-UNNAMED" \
+  --add-modules java.base,java.desktop,java.net.http,java.smartcardio,jdk.crypto.cryptoki,jdk.unsupported \
+  --vendor "CyberCore" \
+  --description "Agente desktop de assinatura digital (A1/A3) ICP-Brasil"
+
+echo "==> Empacotamento concluído com sucesso em: ${DIST_DIR}/${APP_NAME}"
diff --git a/scripts/package-windows.bat b/scripts/package-windows.bat
new file mode 100644
index 0000000..5f9ff6a
--- /dev/null
+++ b/scripts/package-windows.bat
@@ -0,0 +1,45 @@
+@echo off
+rem ==============================================================================
+rem CyberCore Signer — Script de Empacotamento Windows (MSI / EXE) com jpackage
+rem ==============================================================================
+
+echo [1/3] Compilando CyberCore Signer via Maven...
+call mvnw.cmd clean package -DskipTests
+
+if exist "modules\cybercore-app\target\cybercore-app-0.1.0-SNAPSHOT-shaded.jar" (
+    copy "modules\cybercore-app\target\cybercore-app-0.1.0-SNAPSHOT-shaded.jar" "modules\cybercore-app\target\cybercore-signer.jar"
+)
+
+set DIST_DIR=dist
+if not exist "%DIST_DIR%" mkdir "%DIST_DIR%"
+
+echo [2/3] Localizando jpackage no JDK...
+if "%JAVA_HOME%"=="" (
+    echo ERRO: Variavel JAVA_HOME nao definida.
+    exit /b 1
+)
+
+set JPACKAGE="%JAVA_HOME%\bin\jpackage.exe"
+if not exist %JPACKAGE% (
+    echo ERRO: jpackage.exe nao encontrado em %JAVA_HOME%\bin.
+    exit /b 1
+)
+
+echo [3/3] Gerando instalador MSI Windows com runtime autocontido...
+%JPACKAGE% ^
+  --name "CyberCore Signer" ^
+  --app-version "0.1.0" ^
+  --input "modules\cybercore-app\target" ^
+  --main-jar "cybercore-signer.jar" ^
+  --main-class "br.com.cybercore.signer.app.CyberCoreSignerApplication" ^
+  --type msi ^
+  --dest "%DIST_DIR%" ^
+  --win-dir-chooser ^
+  --win-menu ^
+  --win-shortcut ^
+  --vendor "CyberCore" ^
+  --description "Agente desktop de assinatura digital (A1/A3) ICP-Brasil" ^
+  --java-options "-Xms64m -Xmx256m --enable-native-access=ALL-UNNAMED" ^
+  --add-modules java.base,java.desktop,java.net.http,java.smartcardio,jdk.crypto.cryptoki,jdk.crypto.mscapi,jdk.unsupported
+
+echo Concluido! Instalador gerado em %DIST_DIR%
diff --git a/sdk/README.md b/sdk/README.md
new file mode 100644
index 0000000..02166cb
--- /dev/null
+++ b/sdk/README.md
@@ -0,0 +1,64 @@
+# @cybercore/signer-sdk
+
+SDK oficial em JavaScript para integração de aplicações web com o agente desktop **CyberCore Signer** via protocolo **CCSP/1**.
+
+Permite que sistemas web executem assinaturas digitais ICP-Brasil padrão **A1** (.pfx/.p12) e **A3** (Tokens USB e Smart Cards) instalados localmente na máquina do usuário, mantendo as chaves privadas e o PIN sob proteção estrita do hardware.
+
+---
+
+## 🚀 Instalação e Uso Rápido
+
+### 1. Inclusão Direta no HTML (ES Module)
+```html
+<script type="module">
+  import { CyberCoreSigner } from './src/signer-sdk.js';
+
+  const signer = new CyberCoreSigner({
+    applicationName: 'Portal Minha Empresa'
+  });
+
+  // 1. Verifica se o agente desktop está rodando
+  if (await signer.isInstalled()) {
+    console.log('Agente detectado!');
+
+    // 2. Conecta e solicita autorização ao usuário
+    await signer.connect();
+
+    // 3. Obtém certificados disponíveis
+    const certs = await signer.getCertificates();
+    console.log('Certificados encontrados:', certs);
+
+    // 4. Assina um documento (o SDK calcula o SHA-256 no próprio navegador)
+    const result = await signer.sign({
+      certificateId: certs[0].id,
+      data: 'Texto ou buffer do contrato para assinatura'
+    });
+
+    console.log('Assinatura Base64:', result.signature);
+  }
+</script>
+```
+
+---
+
+## 📚 Métodos da API
+
+| Método | Retorno | Descrição |
+|---|---|---|
+| `isInstalled(timeoutMs)` | `Promise<boolean>` | Verifica se o CyberCore Signer está ativo na porta local `21325`. |
+| `getStatus()` | `Promise<Object>` | Retorna status de prontidão, versão e sistema operacional. |
+| `getVersion()` | `Promise<Object>` | Retorna versões do agente e do protocolo CCSP. |
+| `getCapabilities()` | `Promise<Object>` | Retorna algoritmos suportados (`SHA256withRSA`, etc.) e tipos de certificados. |
+| `connect()` | `Promise<boolean>` | Realiza o handshake de autorização da aplicação web com o usuário. |
+| `getCertificates()` | `Promise<Array>` | Retorna a lista de certificados A1 e A3 disponíveis na máquina. |
+| `sign(options)` | `Promise<Object>` | Solicita a assinatura digital de um digest ou documento. |
+| `verify(options)` | `Promise<boolean>` | Validação criptográfica da integridade da assinatura. |
+
+---
+
+## 🔒 Princípios de Segurança e Privacidade
+
+- **Apenas o Digest é transmitido:** O documento completo nunca sai do navegador da aplicação web. O SDK calcula o hash SHA-256 localmente antes de invocar o agente.
+- **Isolamento Total:** A comunicação ocorre exclusivamente via loopback em `127.0.0.1:21325`.
+- **Autorização Prévia:** Aplicações web desconhecidas devem ser autorizadas visualmente pelo usuário na tela do CyberCore Signer antes de listar certificados.
+- **PIN Protegido:** O PIN do token A3 nunca trafega pela web e nunca é enviado a nenhum servidor remoto.
diff --git a/sdk/demo/index.html b/sdk/demo/index.html
new file mode 100644
index 0000000..fdb67ef
--- /dev/null
+++ b/sdk/demo/index.html
@@ -0,0 +1,1288 @@
+<!DOCTYPE html>
+<html lang="pt-BR">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>CyberCore Signer — Assinatura Digital de PDF, XML, Arquivos e Login Digital (CCSP/1)</title>
+  <link rel="preconnect" href="https://fonts.googleapis.com">
+  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+  <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap" rel="stylesheet">
+  <style>
+    :root {
+      --bg-base: #090d16;
+      --bg-surface: #0f172a;
+      --bg-card: #131c31;
+      --bg-card-subtle: #18223c;
+      --bg-hover: #1e293b;
+      --border-subtle: #24304f;
+      --border-focus: #38bdf8;
+      --border-glow: rgba(56, 189, 248, 0.35);
+      --primary: #38bdf8;
+      --primary-hover: #0ea5e9;
+      --primary-glow: rgba(56, 189, 248, 0.25);
+      --accent-purple: #818cf8;
+      --accent-cyan: #22d3ee;
+      --success: #34d399;
+      --warning: #fbbf24;
+      --danger: #f87171;
+      --text-main: #f8fafc;
+      --text-muted: #94a3b8;
+      --text-dim: #64748b;
+      --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
+      --font-mono: 'JetBrains Mono', monospace;
+      --radius-sm: 6px;
+      --radius-md: 10px;
+      --radius-lg: 14px;
+      --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
+    }
+
+    * {
+      box-sizing: border-box;
+      margin: 0;
+      padding: 0;
+    }
+
+    body {
+      background-color: var(--bg-base);
+      color: var(--text-main);
+      font-family: var(--font-sans);
+      line-height: 1.5;
+      min-height: 100vh;
+      display: flex;
+      flex-direction: column;
+      background-image: 
+        radial-gradient(at 0% 0%, rgba(56, 189, 248, 0.08) 0px, transparent 50%),
+        radial-gradient(at 100% 100%, rgba(129, 140, 248, 0.07) 0px, transparent 50%);
+    }
+
+    /* Header */
+    header {
+      background: rgba(15, 23, 42, 0.85);
+      backdrop-filter: blur(12px);
+      border-bottom: 1px solid var(--border-subtle);
+      position: sticky;
+      top: 0;
+      z-index: 100;
+      padding: 14px 28px;
+    }
+
+    .header-content {
+      max-width: 1280px;
+      margin: 0 auto;
+      display: flex;
+      align-items: center;
+      justify-content: space-between;
+      gap: 16px;
+    }
+
+    .brand-wrap {
+      display: flex;
+      align-items: center;
+      gap: 12px;
+    }
+
+    .brand-logo {
+      width: 38px;
+      height: 38px;
+      background: linear-gradient(135deg, var(--primary), var(--accent-purple));
+      border-radius: var(--radius-sm);
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      font-weight: 800;
+      font-size: 19px;
+      color: #0f172a;
+      box-shadow: 0 0 16px var(--primary-glow);
+    }
+
+    .brand-text h1 {
+      font-size: 16px;
+      font-weight: 700;
+      letter-spacing: 0.5px;
+      background: linear-gradient(to right, #ffffff, #cbd5e1);
+      -webkit-background-clip: text;
+      -webkit-text-fill-color: transparent;
+    }
+
+    .brand-text p {
+      font-size: 11px;
+      color: var(--text-muted);
+      letter-spacing: 0.2px;
+    }
+
+    .header-actions {
+      display: flex;
+      align-items: center;
+      gap: 12px;
+    }
+
+    .agent-status-badge {
+      display: flex;
+      align-items: center;
+      gap: 8px;
+      padding: 6px 14px;
+      background: var(--bg-card);
+      border: 1px solid var(--border-subtle);
+      border-radius: 20px;
+      font-size: 12px;
+      font-weight: 500;
+    }
+
+    .status-dot {
+      width: 8px;
+      height: 8px;
+      border-radius: 50%;
+      background: var(--danger);
+      box-shadow: 0 0 8px var(--danger);
+      transition: all 0.3s ease;
+    }
+
+    .status-dot.online {
+      background: var(--success);
+      box-shadow: 0 0 8px var(--success);
+    }
+
+    /* Container Principal */
+    main {
+      flex: 1;
+      max-width: 1280px;
+      width: 100%;
+      margin: 24px auto;
+      padding: 0 20px;
+      display: flex;
+      flex-direction: column;
+      gap: 24px;
+    }
+
+    .banner {
+      background: linear-gradient(135deg, rgba(30, 41, 59, 0.6), rgba(15, 23, 42, 0.95));
+      border: 1px solid var(--border-subtle);
+      border-radius: var(--radius-lg);
+      padding: 20px 24px;
+      display: flex;
+      justify-content: space-between;
+      align-items: center;
+      gap: 20px;
+      box-shadow: var(--shadow-card);
+    }
+
+    .banner-text h2 {
+      font-size: 17px;
+      font-weight: 700;
+      color: #fff;
+      margin-bottom: 4px;
+    }
+
+    .banner-text p {
+      font-size: 13px;
+      color: var(--text-muted);
+      max-width: 820px;
+    }
+
+    /* Seletor de Certificado Global */
+    .cert-bar {
+      background: var(--bg-card);
+      border: 1px solid var(--border-subtle);
+      border-radius: var(--radius-md);
+      padding: 14px 20px;
+      display: flex;
+      align-items: center;
+      justify-content: space-between;
+      gap: 16px;
+      flex-wrap: wrap;
+    }
+
+    .cert-bar-left {
+      display: flex;
+      align-items: center;
+      gap: 12px;
+      flex: 1;
+      min-width: 280px;
+    }
+
+    .cert-bar-select {
+      flex: 1;
+      background: var(--bg-surface);
+      border: 1px solid var(--border-subtle);
+      color: #fff;
+      padding: 8px 12px;
+      border-radius: var(--radius-sm);
+      font-size: 13px;
+      outline: none;
+      cursor: pointer;
+    }
+
+    .cert-bar-select:focus {
+      border-color: var(--primary);
+    }
+
+    /* Abas de Navegação de Funcionalidades */
+    .tabs-nav {
+      display: flex;
+      gap: 8px;
+      border-bottom: 1px solid var(--border-subtle);
+      padding-bottom: 4px;
+      flex-wrap: wrap;
+    }
+
+    .tab-btn {
+      background: transparent;
+      border: none;
+      color: var(--text-muted);
+      padding: 10px 18px;
+      border-radius: var(--radius-sm) var(--radius-sm) 0 0;
+      font-size: 13px;
+      font-weight: 600;
+      cursor: pointer;
+      display: flex;
+      align-items: center;
+      gap: 8px;
+      transition: all 0.2s ease;
+      position: relative;
+    }
+
+    .tab-btn:hover {
+      color: var(--text-main);
+      background: rgba(30, 41, 59, 0.4);
+    }
+
+    .tab-btn.active {
+      color: var(--primary);
+      background: var(--bg-card);
+      border: 1px solid var(--border-subtle);
+      border-bottom: 1px solid var(--bg-card);
+    }
+
+    .tab-btn.active::after {
+      content: '';
+      position: absolute;
+      bottom: -1px;
+      left: 0;
+      right: 0;
+      height: 2px;
+      background: var(--primary);
+    }
+
+    .tab-pane {
+      display: none;
+      flex-direction: column;
+      gap: 20px;
+    }
+
+    .tab-pane.active {
+      display: flex;
+    }
+
+    /* Cards e Grids */
+    .card-grid {
+      display: grid;
+      grid-template-columns: 1fr 1fr;
+      gap: 20px;
+    }
+
+    @media (max-width: 900px) {
+      .card-grid {
+        grid-template-columns: 1fr;
+      }
+    }
+
+    .card {
+      background: var(--bg-card);
+      border: 1px solid var(--border-subtle);
+      border-radius: var(--radius-md);
+      padding: 20px;
+      display: flex;
+      flex-direction: column;
+      gap: 16px;
+      box-shadow: var(--shadow-card);
+    }
+
+    .card-header {
+      display: flex;
+      align-items: center;
+      justify-content: space-between;
+      border-bottom: 1px solid var(--border-subtle);
+      padding-bottom: 12px;
+    }
+
+    .card-title {
+      font-size: 15px;
+      font-weight: 600;
+      color: #fff;
+      display: flex;
+      align-items: center;
+      gap: 8px;
+    }
+
+    /* Drop Zone para Arquivos */
+    .drop-zone {
+      border: 2px dashed var(--border-subtle);
+      border-radius: var(--radius-md);
+      padding: 28px 20px;
+      text-align: center;
+      cursor: pointer;
+      background: rgba(15, 23, 42, 0.4);
+      transition: all 0.2s ease;
+      display: flex;
+      flex-direction: column;
+      align-items: center;
+      gap: 8px;
+    }
+
+    .drop-zone:hover, .drop-zone.dragover {
+      border-color: var(--primary);
+      background: rgba(56, 189, 248, 0.05);
+    }
+
+    .drop-icon {
+      font-size: 32px;
+    }
+
+    .file-meta-box {
+      background: var(--bg-surface);
+      border: 1px solid var(--border-subtle);
+      border-radius: var(--radius-sm);
+      padding: 12px 14px;
+      display: flex;
+      align-items: center;
+      justify-content: space-between;
+      font-size: 12px;
+    }
+
+    /* Botões */
+    .btn {
+      display: inline-flex;
+      align-items: center;
+      justify-content: center;
+      gap: 8px;
+      padding: 10px 18px;
+      font-size: 13px;
+      font-weight: 600;
+      font-family: var(--font-sans);
+      border-radius: var(--radius-sm);
+      cursor: pointer;
+      transition: all 0.2s ease;
+      border: none;
+      outline: none;
+    }
+
+    .btn-primary {
+      background: linear-gradient(135deg, var(--primary), var(--primary-hover));
+      color: #090d16;
+      box-shadow: 0 4px 14px var(--primary-glow);
+    }
+
+    .btn-primary:hover {
+      filter: brightness(1.1);
+      transform: translateY(-1px);
+    }
+
+    .btn-secondary {
+      background: var(--bg-hover);
+      color: var(--text-main);
+      border: 1px solid var(--border-subtle);
+    }
+
+    .btn-secondary:hover {
+      background: #334155;
+      border-color: #475569;
+    }
+
+    .btn-auth {
+      background: linear-gradient(135deg, #10b981, #059669);
+      color: #ffffff;
+      box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
+    }
+
+    .btn-auth:hover {
+      filter: brightness(1.15);
+      transform: translateY(-1px);
+    }
+
+    .btn:disabled {
+      opacity: 0.5;
+      cursor: not-allowed;
+      transform: none !important;
+      filter: grayscale(0.5);
+    }
+
+    /* Formulários e Inputs */
+    .form-group {
+      display: flex;
+      flex-direction: column;
+      gap: 6px;
+    }
+
+    .form-label {
+      font-size: 12px;
+      font-weight: 500;
+      color: var(--text-muted);
+    }
+
+    textarea, input[type="text"] {
+      width: 100%;
+      background: var(--bg-surface);
+      border: 1px solid var(--border-subtle);
+      border-radius: var(--radius-sm);
+      padding: 10px 12px;
+      color: #fff;
+      font-family: var(--font-mono);
+      font-size: 12px;
+      resize: vertical;
+      outline: none;
+      transition: border-color 0.2s;
+    }
+
+    textarea:focus, input[type="text"]:focus {
+      border-color: var(--primary);
+    }
+
+    .code-box {
+      background: #060911;
+      border: 1px solid var(--border-subtle);
+      border-radius: var(--radius-sm);
+      padding: 12px;
+      font-family: var(--font-mono);
+      font-size: 11px;
+      color: #38bdf8;
+      max-height: 180px;
+      overflow-y: auto;
+      word-break: break-all;
+      white-space: pre-wrap;
+    }
+
+    .alert {
+      padding: 10px 14px;
+      border-radius: var(--radius-sm);
+      font-size: 12px;
+      display: flex;
+      align-items: center;
+      gap: 8px;
+    }
+
+    .alert-info {
+      background: rgba(56, 189, 248, 0.1);
+      border: 1px solid rgba(56, 189, 248, 0.25);
+      color: #38bdf8;
+    }
+
+    .alert-success {
+      background: rgba(52, 211, 153, 0.1);
+      border: 1px solid rgba(52, 211, 153, 0.25);
+      color: #34d399;
+    }
+
+    .alert-error {
+      background: rgba(248, 113, 113, 0.1);
+      border: 1px solid rgba(248, 113, 113, 0.25);
+      color: #f87171;
+    }
+
+    /* Crachá de Usuário Logado */
+    .user-badge-card {
+      background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(15, 23, 42, 0.8));
+      border: 1px solid rgba(52, 211, 153, 0.35);
+      border-radius: var(--radius-md);
+      padding: 20px;
+      display: flex;
+      gap: 18px;
+      align-items: center;
+    }
+
+    .user-avatar {
+      width: 56px;
+      height: 56px;
+      border-radius: 50%;
+      background: linear-gradient(135deg, var(--success), #059669);
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      font-size: 24px;
+      color: #090d16;
+      font-weight: 800;
+      box-shadow: 0 0 16px rgba(52, 211, 153, 0.3);
+    }
+
+    .user-info h3 {
+      font-size: 16px;
+      font-weight: 700;
+      color: #fff;
+    }
+
+    .user-info p {
+      font-size: 12px;
+      color: var(--text-muted);
+    }
+
+    .badge-tag {
+      display: inline-block;
+      padding: 2px 8px;
+      border-radius: 4px;
+      font-size: 10px;
+      font-weight: 700;
+      text-transform: uppercase;
+      background: rgba(56, 189, 248, 0.15);
+      color: var(--primary);
+      border: 1px solid rgba(56, 189, 248, 0.3);
+    }
+
+    .badge-a1 {
+      background: rgba(52, 211, 153, 0.15);
+      color: var(--success);
+      border-color: rgba(52, 211, 153, 0.3);
+    }
+
+    .badge-a3 {
+      background: rgba(56, 189, 248, 0.15);
+      color: var(--primary);
+      border-color: rgba(56, 189, 248, 0.3);
+    }
+
+    .spinner {
+      display: inline-block;
+      width: 14px;
+      height: 14px;
+      border: 2px solid rgba(255, 255, 255, 0.3);
+      border-radius: 50%;
+      border-top-color: #fff;
+      animation: spin 0.8s linear infinite;
+    }
+
+    @keyframes spin {
+      to { transform: rotate(360deg); }
+    }
+
+    footer {
+      border-top: 1px solid var(--border-subtle);
+      padding: 18px 24px;
+      text-align: center;
+      font-size: 12px;
+      color: var(--text-dim);
+      margin-top: auto;
+    }
+  </style>
+</head>
+<body>
+
+  <header>
+    <div class="header-content">
+      <div class="brand-wrap">
+        <div class="brand-logo">CC</div>
+        <div class="brand-text">
+          <h1>CYBERCORE SIGNER</h1>
+          <p>Assinatura de Documentos (PDF / XML / Arquivos) e Autenticação Digital ICP-Brasil (CCSP/1)</p>
+        </div>
+      </div>
+      <div class="header-actions">
+        <div class="agent-status-badge">
+          <div id="statusDot" class="status-dot"></div>
+          <span id="statusText">Verificando agente...</span>
+        </div>
+        <button id="btnConnect" class="btn btn-primary" style="padding: 7px 14px; font-size: 12px;">
+          <span>⚡</span> Conectar & Autorizar
+        </button>
+      </div>
+    </div>
+  </header>
+
+  <main>
+    <div class="banner">
+      <div class="banner-text">
+        <h2>Plataforma Unificada de Assinatura & Identidade Digital</h2>
+        <p>
+          O CyberCore Signer permite que aplicações web assinem <strong>documentos PDF, arquivos XML (NF-e/XMLDSig) e arquivos gerais</strong>, além de realizar <strong>Login Seguro com Certificado Digital (A1/A3)</strong> via protocolo CCSP/1 diretamente na máquina do usuário.
+        </p>
+      </div>
+      <button id="btnCheckStatus" class="btn btn-secondary">
+        <span>🔄</span> Recarregar Agente
+      </button>
+    </div>
+
+    <!-- Barra de Certificados Ativos -->
+    <div class="cert-bar">
+      <div class="cert-bar-left">
+        <span style="font-size: 13px; font-weight: 600; color: #fff;">Certificado Ativo:</span>
+        <select id="certSelect" class="cert-bar-select">
+          <option value="">Conecte o agente para carregar os certificados...</option>
+        </select>
+      </div>
+      <div id="certBadgeInfo" style="display: flex; gap: 8px; align-items: center;">
+        <span id="certTypeBadge" class="badge-tag" style="display: none;">A1</span>
+        <span id="certValidityText" style="font-size: 11px; color: var(--text-muted);"></span>
+      </div>
+    </div>
+
+    <!-- Abas de Navegação -->
+    <div class="tabs-nav">
+      <button class="tab-btn active" data-tab="tab-pdf">
+        <span>📄</span> Assinar PDF
+      </button>
+      <button class="tab-btn" data-tab="tab-xml">
+        <span>📋</span> Assinar XML (NF-e)
+      </button>
+      <button class="tab-btn" data-tab="tab-file">
+        <span>📁</span> Arquivos em Geral
+      </button>
+      <button class="tab-btn" data-tab="tab-auth">
+        <span>🔑</span> Login com Certificado Digital
+      </button>
+    </div>
+
+    <!-- ABA 1: ASSINAR PDF -->
+    <div id="tab-pdf" class="tab-pane active">
+      <div class="card-grid">
+        <div class="card">
+          <div class="card-header">
+            <span class="card-title"><span>📄</span> Seleção do Documento PDF</span>
+            <span class="badge-tag">PAdES / Digest</span>
+          </div>
+
+          <div id="pdfDropZone" class="drop-zone">
+            <div class="drop-icon">📑</div>
+            <p style="font-size: 13px; font-weight: 600; color: #fff;">Arraste um PDF ou clique para selecionar</p>
+            <p style="font-size: 11px; color: var(--text-muted);">Suporta qualquer documento .pdf</p>
+            <input type="file" id="pdfFileInput" accept="application/pdf" style="display: none;">
+          </div>
+
+          <div id="pdfFileMeta" class="file-meta-box" style="display: none;">
+            <div>
+              <strong id="pdfFileName" style="color: #fff;">contrato_prestacao.pdf</strong>
+              <div id="pdfFileSize" style="color: var(--text-muted); font-size: 11px;">0 KB</div>
+            </div>
+            <span class="badge-tag">PDF</span>
+          </div>
+
+          <div class="form-group">
+            <label class="form-label">Digest SHA-256 Calculado no Navegador (Base64):</label>
+            <div id="pdfDigestBox" class="code-box">Selecione um arquivo PDF para calcular o digest...</div>
+          </div>
+
+          <button id="btnSignPdf" class="btn btn-primary" style="padding: 12px;" disabled>
+            <span>✍️</span> Assinar PDF com CyberCore
+          </button>
+
+          <div id="pdfAlert" class="alert alert-info" style="display: none;"></div>
+        </div>
+
+        <div class="card">
+          <div class="card-header">
+            <span class="card-title"><span>🛡️</span> Resultado da Assinatura Digital</span>
+          </div>
+
+          <div class="form-group">
+            <label class="form-label">Assinatura Digital Retornada (Base64):</label>
+            <div id="pdfSigOutput" class="code-box" style="min-height: 120px;">Aguardando assinatura do PDF...</div>
+          </div>
+
+          <div class="form-group">
+            <label class="form-label">Cadeia do Certificado Digital X.509:</label>
+            <div id="pdfCertOutput" class="code-box">Nenhum certificado emitido ainda.</div>
+          </div>
+        </div>
+      </div>
+    </div>
+
+    <!-- ABA 2: ASSINAR XML -->
+    <div id="tab-xml" class="tab-pane">
+      <div class="card-grid">
+        <div class="card">
+          <div class="card-header">
+            <span class="card-title"><span>📋</span> Conteúdo do XML (NF-e / XMLDSig)</span>
+            <button id="btnLoadXmlSample" class="btn btn-secondary" style="padding: 4px 10px; font-size: 11px;">
+              Carregar Exemplo NF-e
+            </button>
+          </div>
+
+          <div class="form-group">
+            <label class="form-label">Estrutura XML para Assinatura:</label>
+            <textarea id="xmlContentInput" rows="7" placeholder="Cole o XML ou selecione um arquivo..."></textarea>
+          </div>
+
+          <div class="form-group">
+            <label class="form-label">Digest SHA-256 Calculado no Navegador (Base64):</label>
+            <div id="xmlDigestBox" class="code-box">Aguardando XML...</div>
+          </div>
+
+          <button id="btnSignXml" class="btn btn-primary" style="padding: 12px;" disabled>
+            <span>✍️</span> Assinar XML com CyberCore
+          </button>
+
+          <div id="xmlAlert" class="alert alert-info" style="display: none;"></div>
+        </div>
+
+        <div class="card">
+          <div class="card-header">
+            <span class="card-title"><span>🛡️</span> Pacote XML Assinado (XMLDSig)</span>
+          </div>
+
+          <div class="form-group">
+            <label class="form-label">Bloco SignatureValue (Base64):</label>
+            <div id="xmlSigOutput" class="code-box" style="min-height: 120px;">Aguardando assinatura do XML...</div>
+          </div>
+
+          <div class="form-group">
+            <label class="form-label">Tag XMLDSig Incorporável:</label>
+            <div id="xmlTagOutput" class="code-box">&lt;Signature xmlns="http://www.w3.org/2000/09/xmldsig#"&gt;...&lt;/Signature&gt;</div>
+          </div>
+        </div>
+      </div>
+    </div>
+
+    <!-- ABA 3: ARQUIVOS EM GERAL -->
+    <div id="tab-file" class="tab-pane">
+      <div class="card-grid">
+        <div class="card">
+          <div class="card-header">
+            <span class="card-title"><span>📁</span> Qualquer Arquivo (CAdES / Detached)</span>
+            <span class="badge-tag">Universal</span>
+          </div>
+
+          <div id="genDropZone" class="drop-zone">
+            <div class="drop-icon">📦</div>
+            <p style="font-size: 13px; font-weight: 600; color: #fff;">Arraste qualquer arquivo ou clique para selecionar</p>
+            <p style="font-size: 11px; color: var(--text-muted);">ZIP, DOCX, XLSX, TXT, imagens, áudios, etc.</p>
+            <input type="file" id="genFileInput" style="display: none;">
+          </div>
+
+          <div id="genFileMeta" class="file-meta-box" style="display: none;">
+            <div>
+              <strong id="genFileName" style="color: #fff;">arquivo.ext</strong>
+              <div id="genFileSize" style="color: var(--text-muted); font-size: 11px;">0 KB</div>
+            </div>
+            <span id="genFileBadge" class="badge-tag">ARQUIVO</span>
+          </div>
+
+          <div class="form-group">
+            <label class="form-label">Hash Criptográfico SHA-256 (Base64):</label>
+            <div id="genDigestBox" class="code-box">Selecione um arquivo para calcular o hash...</div>
+          </div>
+
+          <button id="btnSignGen" class="btn btn-primary" style="padding: 12px;" disabled>
+            <span>✍️</span> Assinar Arquivo com CyberCore
+          </button>
+
+          <div id="genAlert" class="alert alert-info" style="display: none;"></div>
+        </div>
+
+        <div class="card">
+          <div class="card-header">
+            <span class="card-title"><span>🛡️</span> Assinatura CAdES / Detached</span>
+          </div>
+
+          <div class="form-group">
+            <label class="form-label">Assinatura Digital (Base64):</label>
+            <div id="genSigOutput" class="code-box" style="min-height: 120px;">Aguardando assinatura...</div>
+          </div>
+
+          <div class="form-group">
+            <label class="form-label">Metadados da Assinatura:</label>
+            <div id="genMetaOutput" class="code-box">Nenhum metadado disponível.</div>
+          </div>
+        </div>
+      </div>
+    </div>
+
+    <!-- ABA 4: LOGIN COM CERTIFICADO DIGITAL -->
+    <div id="tab-auth" class="tab-pane">
+      <div class="card-grid">
+        <div class="card">
+          <div class="card-header">
+            <span class="card-title"><span>🔑</span> Autenticação em Sistema Web</span>
+            <span class="badge-tag" style="background: rgba(16, 185, 129, 0.2); color: var(--success); border-color: rgba(52, 211, 153, 0.3);">
+              Challenge-Response
+            </span>
+          </div>
+
+          <p style="font-size: 13px; color: var(--text-muted);">
+            O sistema web emite um <strong>desafio criptográfico único</strong> que é assinado localmente com a chave privada do certificado (A1 ou Token/Smart Card A3), validando a identidade do usuário sem necessidade de senhas.
+          </p>
+
+          <div class="form-group">
+            <label class="form-label">Desafio do Servidor (Challenge / Server Nonce):</label>
+            <input type="text" id="authChallengeInput" readonly>
+          </div>
+
+          <div style="display: flex; gap: 10px;">
+            <button id="btnNewChallenge" class="btn btn-secondary" style="padding: 8px 14px; font-size: 12px;">
+              <span>🎲</span> Gerar Novo Desafio
+            </button>
+            <button id="btnAuthLogin" class="btn btn-auth" style="flex: 1; padding: 12px;" disabled>
+              <span>🔐</span> Entrar com Certificado Digital
+            </button>
+          </div>
+
+          <div id="authAlert" class="alert alert-info" style="display: none;"></div>
+        </div>
+
+        <div class="card">
+          <div class="card-header">
+            <span class="card-title"><span>👤</span> Sessão do Usuário Autenticado</span>
+          </div>
+
+          <div id="authUserCard" class="user-badge-card" style="display: none;">
+            <div id="authUserAvatar" class="user-avatar">CS</div>
+            <div class="user-info">
+              <h3 id="authUserName">Nome do Titular</h3>
+              <p id="authUserCpf">CPF / CNPJ: 000.000.000-00</p>
+              <div style="margin-top: 6px; display: flex; gap: 8px;">
+                <span class="badge-tag badge-a1">Autenticado com Sucesso</span>
+                <span id="authUserCertType" class="badge-tag badge-a3">ICP-Brasil</span>
+              </div>
+            </div>
+          </div>
+
+          <div id="authWaitBox" style="text-align: center; color: var(--text-dim); padding: 40px 20px; font-size: 13px;">
+            Clique em "Entrar com Certificado Digital" para iniciar a sessão segura.
+          </div>
+
+          <div class="form-group" style="margin-top: 10px;">
+            <label class="form-label">Token de Sessão / Assinatura do Desafio:</label>
+            <div id="authSigOutput" class="code-box">Nenhuma autenticação realizada ainda.</div>
+          </div>
+        </div>
+      </div>
+    </div>
+
+  </main>
+
+  <footer>
+    CyberCore Signer v0.1.0 — Agente Desktop para Assinaturas e Autenticação Digital ICP-Brasil (PAdES, XMLDSig, CAdES, Login).
+  </footer>
+
+  <!-- Lógica Javascript com o SDK -->
+  <script type="module">
+    import { CyberCoreSigner } from '../src/signer-sdk.js';
+
+    const signer = new CyberCoreSigner({
+      baseUrl: 'http://127.0.0.1:21325',
+      applicationName: 'Portal Corporativo CyberCore'
+    });
+
+    // Elementos Compartilhados
+    const statusDot = document.getElementById('statusDot');
+    const statusText = document.getElementById('statusText');
+    const btnConnect = document.getElementById('btnConnect');
+    const btnCheckStatus = document.getElementById('btnCheckStatus');
+    const certSelect = document.getElementById('certSelect');
+    const certTypeBadge = document.getElementById('certTypeBadge');
+    const certValidityText = document.getElementById('certValidityText');
+
+    let currentCertificates = [];
+    let selectedCertificateId = null;
+
+    // Gerenciador de Abas
+    const tabButtons = document.querySelectorAll('.tab-btn');
+    const tabPanes = document.querySelectorAll('.tab-pane');
+
+    tabButtons.forEach(btn => {
+      btn.addEventListener('click', () => {
+        tabButtons.forEach(b => b.classList.remove('active'));
+        tabPanes.forEach(p => p.classList.remove('active'));
+        btn.classList.add('active');
+        document.getElementById(btn.dataset.tab).classList.add('active');
+      });
+    });
+
+    // Verificação de Status
+    async function checkAgentStatus() {
+      statusText.textContent = 'Verificando...';
+      try {
+        const isOnline = await signer.isInstalled(1500);
+        if (isOnline) {
+          const status = await signer.getStatus();
+          statusDot.classList.add('online');
+          statusText.textContent = `Online (${status.os || 'Windows'})`;
+          return true;
+        }
+      } catch (e) {}
+      statusDot.classList.remove('online');
+      statusText.textContent = 'Agente Offline';
+      return false;
+    }
+
+    // Carregamento de Certificados
+    async function loadCertificates() {
+      try {
+        const certs = await signer.getCertificates();
+        currentCertificates = certs;
+        certSelect.innerHTML = '';
+
+        if (!certs || certs.length === 0) {
+          certSelect.innerHTML = '<option value="">Nenhum certificado detectado no agente</option>';
+          updateButtonStates();
+          return;
+        }
+
+        certs.forEach((c, index) => {
+          const opt = document.createElement('option');
+          opt.value = c.id;
+          opt.textContent = `${c.common_name || c.alias} [${c.type}] (${c.device_name || c.provider_id})`;
+          certSelect.appendChild(opt);
+        });
+
+        certSelect.selectedIndex = 0;
+        onCertificateChanged();
+      } catch (err) {
+        console.error('Erro ao carregar certificados:', err);
+      }
+    }
+
+    function onCertificateChanged() {
+      const selectedId = certSelect.value;
+      selectedCertificateId = selectedId;
+      const cert = currentCertificates.find(c => c.id === selectedId);
+
+      if (cert) {
+        certTypeBadge.style.display = 'inline-block';
+        certTypeBadge.textContent = cert.type || 'A1';
+        certTypeBadge.className = `badge-tag ${cert.type === 'A3' ? 'badge-a3' : 'badge-a1'}`;
+        certValidityText.textContent = `Validade: ${cert.valid_to ? new Date(cert.valid_to).toLocaleDateString() : 'N/D'}`;
+      } else {
+        certTypeBadge.style.display = 'none';
+        certValidityText.textContent = '';
+      }
+
+      updateButtonStates();
+    }
+
+    certSelect.addEventListener('change', onCertificateChanged);
+
+    function updateButtonStates() {
+      const hasCert = Boolean(selectedCertificateId);
+      document.getElementById('btnSignPdf').disabled = !hasCert || !currentPdfDigest;
+      document.getElementById('btnSignXml').disabled = !hasCert || !currentXmlDigest;
+      document.getElementById('btnSignGen').disabled = !hasCert || !currentGenDigest;
+      document.getElementById('btnAuthLogin').disabled = !hasCert;
+    }
+
+    // Conexão e Handshake
+    btnConnect.addEventListener('click', async () => {
+      btnConnect.disabled = true;
+      btnConnect.innerHTML = '<span class="spinner"></span> Solicitando...';
+      try {
+        await signer.connect();
+        statusDot.classList.add('online');
+        statusText.textContent = 'Conectado & Autorizado';
+        await loadCertificates();
+      } catch (err) {
+        alert('Erro ao conectar: ' + err.message);
+      } finally {
+        btnConnect.disabled = false;
+        btnConnect.innerHTML = '<span>⚡</span> Conectar & Autorizar';
+      }
+    });
+
+    btnCheckStatus.addEventListener('click', async () => {
+      const online = await checkAgentStatus();
+      if (online) {
+        await loadCertificates();
+      }
+    });
+
+    // =========================================================================
+    // ABA 1: LÓGICA DE PDF
+    // =========================================================================
+    const pdfDropZone = document.getElementById('pdfDropZone');
+    const pdfFileInput = document.getElementById('pdfFileInput');
+    const pdfFileMeta = document.getElementById('pdfFileMeta');
+    const pdfFileName = document.getElementById('pdfFileName');
+    const pdfFileSize = document.getElementById('pdfFileSize');
+    const pdfDigestBox = document.getElementById('pdfDigestBox');
+    const btnSignPdf = document.getElementById('btnSignPdf');
+    const pdfAlert = document.getElementById('pdfAlert');
+    const pdfSigOutput = document.getElementById('pdfSigOutput');
+    const pdfCertOutput = document.getElementById('pdfCertOutput');
+
+    let currentPdfFile = null;
+    let currentPdfDigest = null;
+
+    pdfDropZone.addEventListener('click', () => pdfFileInput.click());
+    pdfFileInput.addEventListener('change', e => {
+      if (e.target.files.length) handlePdfSelected(e.target.files[0]);
+    });
+
+    pdfDropZone.addEventListener('dragover', e => {
+      e.preventDefault();
+      pdfDropZone.classList.add('dragover');
+    });
+    pdfDropZone.addEventListener('dragleave', () => pdfDropZone.classList.remove('dragover'));
+    pdfDropZone.addEventListener('drop', e => {
+      e.preventDefault();
+      pdfDropZone.classList.remove('dragover');
+      if (e.dataTransfer.files.length) handlePdfSelected(e.dataTransfer.files[0]);
+    });
+
+    async function handlePdfSelected(file) {
+      currentPdfFile = file;
+      pdfFileName.textContent = file.name;
+      pdfFileSize.textContent = (file.size / 1024).toFixed(1) + ' KB';
+      pdfFileMeta.style.display = 'flex';
+
+      const buffer = await file.arrayBuffer();
+      currentPdfDigest = await signer._calculateSha256(buffer);
+      pdfDigestBox.textContent = `SHA-256 (Base64): ${currentPdfDigest}\nArquivo: ${file.name} (${file.size} bytes)`;
+      updateButtonStates();
+    }
+
+    btnSignPdf.addEventListener('click', async () => {
+      btnSignPdf.disabled = true;
+      btnSignPdf.innerHTML = '<span class="spinner"></span> Solicitando no Agente...';
+      pdfAlert.style.display = 'block';
+      pdfAlert.className = 'alert alert-info';
+      pdfAlert.textContent = 'Confirme a assinatura na janela do CyberCore Signer aberta no seu computador...';
+
+      try {
+        const result = await signer.signPdf(currentPdfFile, {
+          certificateId: selectedCertificateId,
+          documentName: currentPdfFile.name
+        });
+
+        pdfAlert.className = 'alert alert-success';
+        pdfAlert.textContent = `✓ Documento PDF assinado com sucesso via ${result.algorithm}!`;
+        pdfSigOutput.textContent = result.signature;
+        pdfCertOutput.textContent = result.certificate;
+      } catch (err) {
+        pdfAlert.className = 'alert alert-error';
+        pdfAlert.textContent = 'Erro ao assinar PDF: ' + err.message;
+      } finally {
+        btnSignPdf.disabled = false;
+        btnSignPdf.innerHTML = '<span>✍️</span> Assinar PDF com CyberCore';
+      }
+    });
+
+    // =========================================================================
+    // ABA 2: LÓGICA DE XML
+    // =========================================================================
+    const xmlContentInput = document.getElementById('xmlContentInput');
+    const xmlDigestBox = document.getElementById('xmlDigestBox');
+    const btnSignXml = document.getElementById('btnSignXml');
+    const btnLoadXmlSample = document.getElementById('btnLoadXmlSample');
+    const xmlAlert = document.getElementById('xmlAlert');
+    const xmlSigOutput = document.getElementById('xmlSigOutput');
+    const xmlTagOutput = document.getElementById('xmlTagOutput');
+
+    let currentXmlDigest = null;
+
+    const sampleXml = `<nfeProc versao="4.00" xmlns="http://www.portalfiscal.inf.br/nfe">
+  <NFe>
+    <infNFe Id="NFe35261012345678000199550010000001001234567890" versao="4.00">
+      <ide>
+        <cUF>35</cUF>
+        <natOp>VENDA DE MERCADORIAS</natOp>
+        <mod>55</mod>
+        <serie>1</serie>
+        <nNF>100</nNF>
+        <dhEmi>2026-10-09T10:00:00-03:00</dhEmi>
+        <tpNF>1</tpNF>
+      </ide>
+      <emit>
+        <CNPJ>12345678000199</CNPJ>
+        <xNome>CYBERCORE TECNOLOGIA LTDA</xNome>
+      </emit>
+    </infNFe>
+  </NFe>
+</nfeProc>`;
+
+    async function updateXmlDigest() {
+      const xml = xmlContentInput.value.trim();
+      if (!xml) {
+        currentXmlDigest = null;
+        xmlDigestBox.textContent = 'Digite ou cole o XML para calcular o digest...';
+      } else {
+        currentXmlDigest = await signer._calculateSha256(xml);
+        xmlDigestBox.textContent = `SHA-256 Digest (Base64): ${currentXmlDigest}\nTamanho: ${xml.length} caracteres`;
+      }
+      updateButtonStates();
+    }
+
+    xmlContentInput.addEventListener('input', updateXmlDigest);
+    btnLoadXmlSample.addEventListener('click', () => {
+      xmlContentInput.value = sampleXml;
+      updateXmlDigest();
+    });
+
+    btnSignXml.addEventListener('click', async () => {
+      btnSignXml.disabled = true;
+      btnSignXml.innerHTML = '<span class="spinner"></span> Solicitando no Agente...';
+      xmlAlert.style.display = 'block';
+      xmlAlert.className = 'alert alert-info';
+      xmlAlert.textContent = 'Confirme a assinatura na janela do CyberCore Signer...';
+
+      try {
+        const result = await signer.signXml(xmlContentInput.value, {
+          certificateId: selectedCertificateId,
+          documentName: 'nfe-3526.xml'
+        });
+
+        xmlAlert.className = 'alert alert-success';
+        xmlAlert.textContent = `✓ XML assinado com sucesso via ${result.algorithm}!`;
+        xmlSigOutput.textContent = result.signature;
+
+        const xmlSigSnippet = `<Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
+  <SignedInfo>
+    <SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/>
+    <Reference URI="#NFe35261012345678000199550010000001001234567890">
+      <DigestValue>${result.digest}</DigestValue>
+    </Reference>
+  </SignedInfo>
+  <SignatureValue>${result.signature.slice(0, 48)}...</SignatureValue>
+  <KeyInfo>
+    <X509Data>
+      <X509Certificate>${result.certificate.slice(0, 48)}...</X509Certificate>
+    </X509Data>
+  </KeyInfo>
+</Signature>`;
+        xmlTagOutput.textContent = xmlSigSnippet;
+      } catch (err) {
+        xmlAlert.className = 'alert alert-error';
+        xmlAlert.textContent = 'Erro ao assinar XML: ' + err.message;
+      } finally {
+        btnSignXml.disabled = false;
+        btnSignXml.innerHTML = '<span>✍️</span> Assinar XML com CyberCore';
+      }
+    });
+
+    // =========================================================================
+    // ABA 3: LÓGICA DE ARQUIVOS GERAIS
+    // =========================================================================
+    const genDropZone = document.getElementById('genDropZone');
+    const genFileInput = document.getElementById('genFileInput');
+    const genFileMeta = document.getElementById('genFileMeta');
+    const genFileName = document.getElementById('genFileName');
+    const genFileSize = document.getElementById('genFileSize');
+    const genFileBadge = document.getElementById('genFileBadge');
+    const genDigestBox = document.getElementById('genDigestBox');
+    const btnSignGen = document.getElementById('btnSignGen');
+    const genAlert = document.getElementById('genAlert');
+    const genSigOutput = document.getElementById('genSigOutput');
+    const genMetaOutput = document.getElementById('genMetaOutput');
+
+    let currentGenFile = null;
+    let currentGenDigest = null;
+
+    genDropZone.addEventListener('click', () => genFileInput.click());
+    genFileInput.addEventListener('change', e => {
+      if (e.target.files.length) handleGenFileSelected(e.target.files[0]);
+    });
+
+    genDropZone.addEventListener('dragover', e => {
+      e.preventDefault();
+      genDropZone.classList.add('dragover');
+    });
+    genDropZone.addEventListener('dragleave', () => genDropZone.classList.remove('dragover'));
+    genDropZone.addEventListener('drop', e => {
+      e.preventDefault();
+      genDropZone.classList.remove('dragover');
+      if (e.dataTransfer.files.length) handleGenFileSelected(e.dataTransfer.files[0]);
+    });
+
+    async function handleGenFileSelected(file) {
+      currentGenFile = file;
+      genFileName.textContent = file.name;
+      genFileSize.textContent = (file.size / 1024).toFixed(1) + ' KB';
+      const ext = file.name.includes('.') ? file.name.split('.').pop().toUpperCase() : 'FILE';
+      genFileBadge.textContent = ext;
+      genFileMeta.style.display = 'flex';
+
+      const buffer = await file.arrayBuffer();
+      currentGenDigest = await signer._calculateSha256(buffer);
+      genDigestBox.textContent = `SHA-256: ${currentGenDigest}\nArquivo: ${file.name} (${file.type || 'binário'})`;
+      updateButtonStates();
+    }
+
+    btnSignGen.addEventListener('click', async () => {
+      btnSignGen.disabled = true;
+      btnSignGen.innerHTML = '<span class="spinner"></span> Solicitando no Agente...';
+      genAlert.style.display = 'block';
+      genAlert.className = 'alert alert-info';
+      genAlert.textContent = 'Confirme a assinatura na janela do CyberCore Signer...';
+
+      try {
+        const result = await signer.signFile(currentGenFile, {
+          certificateId: selectedCertificateId,
+          documentName: currentGenFile.name
+        });
+
+        genAlert.className = 'alert alert-success';
+        genAlert.textContent = `✓ Arquivo assinado com sucesso via ${result.algorithm}!`;
+        genSigOutput.textContent = result.signature;
+        genMetaOutput.textContent = JSON.stringify({
+          documentName: result.documentName,
+          documentType: result.documentType,
+          digest: result.digest,
+          algorithm: result.algorithm,
+          requestId: result.requestId
+        }, null, 2);
+      } catch (err) {
+        genAlert.className = 'alert alert-error';
+        genAlert.textContent = 'Erro ao assinar arquivo: ' + err.message;
+      } finally {
+        btnSignGen.disabled = false;
+        btnSignGen.innerHTML = '<span>✍️</span> Assinar Arquivo com CyberCore';
+      }
+    });
+
+    // =========================================================================
+    // ABA 4: LOGIN COM CERTIFICADO DIGITAL
+    // =========================================================================
+    const authChallengeInput = document.getElementById('authChallengeInput');
+    const btnNewChallenge = document.getElementById('btnNewChallenge');
+    const btnAuthLogin = document.getElementById('btnAuthLogin');
+    const authAlert = document.getElementById('authAlert');
+    const authUserCard = document.getElementById('authUserCard');
+    const authWaitBox = document.getElementById('authWaitBox');
+    const authUserAvatar = document.getElementById('authUserAvatar');
+    const authUserName = document.getElementById('authUserName');
+    const authUserCpf = document.getElementById('authUserCpf');
+    const authUserCertType = document.getElementById('authUserCertType');
+    const authSigOutput = document.getElementById('authSigOutput');
+
+    function generateNewAuthChallenge() {
+      const serverNonce = Math.random().toString(36).substring(2, 15) + Math.random().toString(36).substring(2, 15);
+      authChallengeInput.value = `cybercore-auth-v1:${Date.now()}:${serverNonce}`;
+    }
+
+    generateNewAuthChallenge();
+    btnNewChallenge.addEventListener('click', generateNewAuthChallenge);
+
+    btnAuthLogin.addEventListener('click', async () => {
+      btnAuthLogin.disabled = true;
+      btnAuthLogin.innerHTML = '<span class="spinner"></span> Autenticando...';
+      authAlert.style.display = 'block';
+      authAlert.className = 'alert alert-info';
+      authAlert.textContent = 'Confirme o Login na tela do CyberCore Signer (e digite seu PIN se token A3)...';
+
+      try {
+        const authResult = await signer.authenticate({
+          certificateId: selectedCertificateId,
+          challenge: authChallengeInput.value
+        });
+
+        authAlert.className = 'alert alert-success';
+        authAlert.textContent = '✓ Identidade validada! Sessão de usuário autenticada com sucesso.';
+
+        authWaitBox.style.display = 'none';
+        authUserCard.style.display = 'flex';
+
+        const name = authResult.subjectName || 'Titular do Certificado';
+        authUserName.textContent = name;
+        authUserCpf.textContent = authResult.subjectCpfCnpj ? `CPF/CNPJ: ${authResult.subjectCpfCnpj}` : 'ICP-Brasil Autenticado';
+
+        const initials = name.split(' ').map(p => p[0]).filter(Boolean).slice(0, 2).join('').toUpperCase();
+        authUserAvatar.textContent = initials || 'CC';
+
+        authSigOutput.textContent = `STATUS: AUTHENTICATED\nCHALLENGE: ${authResult.challenge}\nSIGNATURE: ${authResult.signature}\nCERT_HOLDER: ${name}`;
+      } catch (err) {
+        authAlert.className = 'alert alert-error';
+        authAlert.textContent = 'Falha no login com certificado: ' + err.message;
+      } finally {
+        btnAuthLogin.disabled = false;
+        btnAuthLogin.innerHTML = '<span>🔐</span> Entrar com Certificado Digital';
+      }
+    });
+
+    // Inicialização
+    checkAgentStatus();
+  </script>
+</body>
+</html>
diff --git a/sdk/package.json b/sdk/package.json
new file mode 100644
index 0000000..0e8dae0
--- /dev/null
+++ b/sdk/package.json
@@ -0,0 +1,23 @@
+{
+  "name": "@cybercore/signer-sdk",
+  "version": "0.1.0",
+  "description": "SDK JavaScript para integração de aplicações web com o agente desktop CyberCore Signer via protocolo CCSP/1",
+  "type": "module",
+  "main": "src/signer-sdk.js",
+  "module": "src/signer-sdk.js",
+  "scripts": {
+    "test": "node --test test/signer-sdk.test.js"
+  },
+  "author": "CyberCore",
+  "license": "Proprietary",
+  "keywords": [
+    "cybercore",
+    "digital-signature",
+    "icp-brasil",
+    "a1",
+    "a3",
+    "token",
+    "smartcard",
+    "ccsp"
+  ]
+}
diff --git a/sdk/src/errors.js b/sdk/src/errors.js
new file mode 100644
index 0000000..74067d2
--- /dev/null
+++ b/sdk/src/errors.js
@@ -0,0 +1,75 @@
+/**
+ * Erros padronizados do SDK CyberCore Signer alinhados ao protocolo CCSP/1.
+ */
+
+export class CyberCoreError extends Error {
+  constructor(message, code = 'COMMUNICATION_ERROR', originalError = null) {
+    super(message);
+    this.name = 'CyberCoreError';
+    this.code = code;
+    this.originalError = originalError;
+  }
+}
+
+export class AgentNotRunningError extends CyberCoreError {
+  constructor(message = 'O agente desktop CyberCore Signer não está em execução ou não foi detectado em 127.0.0.1:21325.') {
+    super(message, 'AGENT_NOT_RUNNING');
+    this.name = 'AgentNotRunningError';
+  }
+}
+
+export class ApplicationNotAuthorizedError extends CyberCoreError {
+  constructor(message = 'A aplicação web não foi autorizada pelo usuário no CyberCore Signer.') {
+    super(message, 'APPLICATION_NOT_AUTHORIZED');
+    this.name = 'ApplicationNotAuthorizedError';
+  }
+}
+
+export class UserCancelledError extends CyberCoreError {
+  constructor(message = 'A operação de assinatura foi cancelada pelo usuário.') {
+    super(message, 'USER_CANCELLED');
+    this.name = 'UserCancelledError';
+  }
+}
+
+export class CertificateNotFoundError extends CyberCoreError {
+  constructor(message = 'Certificado digital não encontrado ou não selecionado.') {
+    super(message, 'CERTIFICATE_NOT_FOUND');
+    this.name = 'CertificateNotFoundError';
+  }
+}
+
+export class PinRequiredError extends CyberCoreError {
+  constructor(message = 'PIN do token ou smart card A3 é obrigatório.') {
+    super(message, 'PIN_REQUIRED');
+    this.name = 'PinRequiredError';
+  }
+}
+
+export class PinIncorrectError extends CyberCoreError {
+  constructor(message = 'O PIN informado para o dispositivo A3 está incorreto.') {
+    super(message, 'PIN_INCORRECT');
+    this.name = 'PinIncorrectError';
+  }
+}
+
+export class TokenNotFoundError extends CyberCoreError {
+  constructor(message = 'Token USB ou smart card não foi detectado no computador.') {
+    super(message, 'TOKEN_NOT_FOUND');
+    this.name = 'TokenNotFoundError';
+  }
+}
+
+export class RequestExpiredError extends CyberCoreError {
+  constructor(message = 'A solicitação de assinatura expirou.') {
+    super(message, 'REQUEST_EXPIRED');
+    this.name = 'RequestExpiredError';
+  }
+}
+
+export class ReplayDetectedError extends CyberCoreError {
+  constructor(message = 'Requisição duplicada detectada (ataque de replay prevenido).') {
+    super(message, 'REPLAY_DETECTED');
+    this.name = 'ReplayDetectedError';
+  }
+}
diff --git a/sdk/src/signer-sdk.js b/sdk/src/signer-sdk.js
new file mode 100644
index 0000000..4ce25b7
--- /dev/null
+++ b/sdk/src/signer-sdk.js
@@ -0,0 +1,497 @@
+/**
+ * CyberCore Signer Web SDK (@cybercore/signer-sdk)
+ * Protocolo: CCSP/1 (CyberCore Signing Protocol v1)
+ */
+
+import {
+  CyberCoreError,
+  AgentNotRunningError,
+  ApplicationNotAuthorizedError,
+  UserCancelledError,
+  CertificateNotFoundError,
+  PinRequiredError,
+  PinIncorrectError,
+  TokenNotFoundError,
+  RequestExpiredError,
+  ReplayDetectedError
+} from './errors.js';
+
+export class CyberCoreSigner {
+  /**
+   * Inicializa o cliente do SDK.
+   *
+   * @param {Object} options Configurações do SDK.
+   * @param {string} [options.baseUrl='http://127.0.0.1:21325'] URL base do agente local.
+   * @param {string} [options.applicationId] UUID único da aplicação web (gerado se não fornecido).
+   * @param {string} [options.applicationName] Nome legível da aplicação apresentado ao usuário.
+   */
+  constructor(options = {}) {
+    this.baseUrl = (options.baseUrl || 'http://127.0.0.1:21325').replace(/\/+$/, '');
+    this.applicationId = options.applicationId || this._getOrCreateApplicationId();
+    this.applicationName = options.applicationName || (typeof document !== 'undefined' ? document.title : 'Aplicação Web');
+    this.connected = false;
+  }
+
+  /**
+   * Verifica se o agente desktop está instalado e em execução na máquina do usuário.
+   *
+   * @param {number} [timeoutMs=2000] Timeout máximo de resposta em milissegundos.
+   * @returns {Promise<boolean>} Retorna true se o agente estiver ativo e respondendo.
+   */
+  async isInstalled(timeoutMs = 2000) {
+    try {
+      await this.getStatus(timeoutMs);
+      return true;
+    } catch {
+      return false;
+    }
+  }
+
+  /**
+   * Obtém o status operacional do agente CyberCore Signer.
+   *
+   * @param {number} [timeoutMs=3000] Timeout em milissegundos.
+   * @returns {Promise<Object>} Dados de versão, SO e prontidão do agente.
+   */
+  async getStatus(timeoutMs = 3000) {
+    try {
+      const resp = await this._fetch('/ccsp/v1/status', { method: 'GET', timeoutMs });
+      return resp;
+    } catch (err) {
+      if (err.name === 'AbortError' || err.message?.includes('Failed to fetch') || err.message?.includes('NetworkError')) {
+        throw new AgentNotRunningError();
+      }
+      throw err;
+    }
+  }
+
+  /**
+   * Retorna a versão do agente e do protocolo suportado.
+   */
+  async getVersion() {
+    const status = await this.getStatus();
+    return {
+      protocolVersion: status.version || '1',
+      agentVersion: status.agent_version || '0.1.0',
+      os: status.os || 'Desconhecido'
+    };
+  }
+
+  /**
+   * Retorna as capacidades criptográficas do agente local.
+   */
+  async getCapabilities() {
+    return {
+      protocolVersion: '1',
+      supportedAlgorithms: ['SHA256withRSA', 'SHA1withRSA'],
+      supportedHashAlgorithms: ['SHA-256', 'SHA-1'],
+      certificateTypes: ['A1', 'A3'],
+      hardwareSupport: ['Smart Card', 'Token USB (PKCS#11)', 'Windows Certificate Store (CAPI/CNG)'],
+      padesSupport: true
+    };
+  }
+
+  /**
+   * Estabelece conexão e realiza o handshake de autorização com o agente desktop.
+   * Se a aplicação web ainda não for conhecida, o CyberCore solicitará permissão ao usuário na tela.
+   *
+   * @returns {Promise<boolean>} Retorna true quando a aplicação estiver autorizada.
+   */
+  async connect() {
+    try {
+      const resp = await this._fetch('/ccsp/v1/authorize', {
+        method: 'POST',
+        body: JSON.stringify({
+          version: '1',
+          application_id: this.applicationId,
+          name: this.applicationName
+        })
+      });
+
+      if (resp.status === 'authorized') {
+        this.connected = true;
+        return true;
+      }
+      throw new ApplicationNotAuthorizedError();
+    } catch (err) {
+      if (err instanceof CyberCoreError) throw err;
+      if (err.status === 403 || err.code === 'APPLICATION_NOT_AUTHORIZED') {
+        throw new ApplicationNotAuthorizedError();
+      }
+      if (err.message?.includes('Failed to fetch')) {
+        throw new AgentNotRunningError();
+      }
+      throw new CyberCoreError('Falha ao conectar com o CyberCore Signer: ' + err.message, 'CONNECTION_FAILED', err);
+    }
+  }
+
+  /**
+   * Obtém a lista de certificados digitais atualmente disponíveis na máquina (A1 e A3).
+   *
+   * @returns {Promise<Array<Object>>} Lista de certificados com metadados públicos.
+   */
+  async getCertificates() {
+    const resp = await this._fetch('/ccsp/v1/certificates', {
+      method: 'GET'
+    });
+
+    return resp.certificates || [];
+  }
+
+  /**
+   * Executa a assinatura digital de um documento ou digest via CyberCore Signer.
+   *
+   * @param {Object} params Parâmetros da assinatura.
+   * @param {string} params.certificateId Identificador ou hint do certificado selecionado.
+   * @param {string} [params.digest] Hash do documento em Base64 (se já calculado).
+   * @param {string|Uint8Array|ArrayBuffer} [params.data] Conteúdo a ser assinado (o SDK calculará o SHA-256 no browser).
+   * @param {string} [params.algorithm='SHA256withRSA'] Algoritmo de assinatura desejado.
+   * @param {number} [params.expiresInSeconds=120] Tempo de expiração da requisição.
+   * @returns {Promise<Object>} Objeto com a assinatura digital em Base64 e cadeia X.509.
+   */
+  async sign(params) {
+    if (!params) {
+      throw new CyberCoreError('Parâmetros de assinatura são obrigatórios.', 'BAD_REQUEST');
+    }
+
+    const certHint = params.certificateId || params.certificateHint;
+    if (!certHint) {
+      throw new CertificateNotFoundError('É necessário especificar o certificado digital para a assinatura.');
+    }
+
+    // Calcula o digest SHA-256 no próprio navegador caso o digest já não tenha sido passado
+    let digestBase64 = params.digest;
+    if (!digestBase64 && params.data) {
+      digestBase64 = await this._calculateSha256(params.data);
+    }
+
+    if (!digestBase64) {
+      throw new CyberCoreError('Nenhum dado ou digest fornecido para a assinatura.', 'BAD_REQUEST');
+    }
+
+    const requestId = this._generateUuid();
+    const nonce = this._generateUuid();
+    const expiresAt = new Date(Date.now() + (params.expiresInSeconds || 120) * 1000).toISOString();
+    const algorithm = params.algorithm || 'SHA256withRSA';
+
+    const payload = {
+      version: '1',
+      request_id: requestId,
+      application_id: this.applicationId,
+      operation: params.operation || 'sign',
+      algorithm: algorithm,
+      digest: digestBase64,
+      certificate_hint: certHint,
+      document_name: params.documentName || params.fileName,
+      document_type: params.documentType || params.fileType,
+      purpose: params.purpose,
+      nonce: nonce,
+      expires_at: expiresAt
+    };
+
+    try {
+      const resp = await this._fetch('/ccsp/v1/sign', {
+        method: 'POST',
+        body: JSON.stringify(payload)
+      });
+
+      if (resp.status === 'signed' || resp.status === 'authenticated') {
+        return {
+          requestId: resp.request_id,
+          status: resp.status,
+          signature: resp.signature,
+          certificate: resp.certificate,
+          certificateChain: resp.certificate_chain || [resp.certificate],
+          algorithm: resp.algorithm,
+          digest: digestBase64,
+          subjectName: resp.subject_name || null,
+          subjectCpfCnpj: resp.subject_cpf_cnpj || null,
+          documentName: resp.document_name || null,
+          documentType: resp.document_type || null
+        };
+      }
+
+      this._throwMappedError(resp.error_code, resp.message);
+    } catch (err) {
+      if (err instanceof CyberCoreError) throw err;
+      throw new CyberCoreError('Erro durante a execução da assinatura: ' + err.message, 'SIGN_ERROR', err);
+    }
+  }
+
+  /**
+   * Assina um arquivo genérico (qualquer extensão: PDF, XML, DOCX, ZIP, etc.).
+   * O hash SHA-256 é gerado localmente pelo navegador; apenas o digest é transmitido ao agente.
+   *
+   * @param {File|Blob|ArrayBuffer|Uint8Array} file Arquivo a ser assinado.
+   * @param {Object} options Opções de assinatura (deve incluir certificateId).
+   * @returns {Promise<Object>} Resultado da assinatura digital.
+   */
+  async signFile(file, options = {}) {
+    if (!file) {
+      throw new CyberCoreError('Nenhum arquivo fornecido para assinatura.', 'BAD_REQUEST');
+    }
+    const fileName = options.documentName || file.name || 'arquivo';
+    const ext = fileName.includes('.') ? fileName.split('.').pop().toUpperCase() : 'FILE';
+    const fileType = options.documentType || ext;
+
+    const dataBuffer = await this._fileToBuffer(file);
+    const digestBase64 = await this._calculateSha256(dataBuffer);
+
+    return this.sign({
+      ...options,
+      digest: digestBase64,
+      documentName: fileName,
+      documentType: fileType
+    });
+  }
+
+  /**
+   * Assina um documento PDF (PAdES / Assinatura desacoplada).
+   *
+   * @param {File|Blob|ArrayBuffer|Uint8Array} pdfFile Arquivo ou bytes do PDF.
+   * @param {Object} options Opções de assinatura.
+   * @returns {Promise<Object>}
+   */
+  async signPdf(pdfFile, options = {}) {
+    return this.signFile(pdfFile, {
+      ...options,
+      documentType: 'PDF',
+      documentName: options.documentName || (pdfFile?.name) || 'documento.pdf'
+    });
+  }
+
+  /**
+   * Assina um documento XML (XMLDSig / Enveloped / NF-e).
+   *
+   * @param {string|File|Blob|ArrayBuffer} xmlContent Conteúdo string do XML ou arquivo.
+   * @param {Object} options Opções de assinatura.
+   * @returns {Promise<Object>}
+   */
+  async signXml(xmlContent, options = {}) {
+    if (typeof xmlContent === 'string') {
+      const digestBase64 = await this._calculateSha256(xmlContent);
+      return this.sign({
+        ...options,
+        digest: digestBase64,
+        documentName: options.documentName || 'documento.xml',
+        documentType: 'XML'
+      });
+    }
+    return this.signFile(xmlContent, {
+      ...options,
+      documentType: 'XML',
+      documentName: options.documentName || (xmlContent?.name) || 'documento.xml'
+    });
+  }
+
+  /**
+   * Realiza login / autenticação segura em sistemas web utilizando Certificado Digital (Challenge-Response ICP-Brasil).
+   * Assina o desafio (challenge) emitido pelo servidor e retorna o certificado e dados decodificados do titular.
+   *
+   * @param {Object} options Opções de login.
+   * @param {string} [options.challenge] Desafio / nonce único emitido pelo servidor da aplicação web.
+   * @param {string} options.certificateId Identificador do certificado digital do usuário.
+   * @param {string} [options.algorithm='SHA256withRSA'] Algoritmo de assinatura.
+   * @returns {Promise<Object>} Retorna o token de autenticação assinado, dados do titular (Nome, CPF/CNPJ) e certificado X.509.
+   */
+  async authenticate(options = {}) {
+    const certHint = options.certificateId || options.certificateHint;
+    if (!certHint) {
+      throw new CertificateNotFoundError('É necessário selecionar um certificado digital para login.');
+    }
+
+    const challenge = options.challenge || `auth-challenge-${this._generateUuid()}-${Date.now()}`;
+    const challengeDigest = await this._calculateSha256(challenge);
+    const requestId = this._generateUuid();
+    const nonce = this._generateUuid();
+    const expiresAt = new Date(Date.now() + (options.expiresInSeconds || 90) * 1000).toISOString();
+    const algorithm = options.algorithm || 'SHA256withRSA';
+
+    const payload = {
+      version: '1',
+      request_id: requestId,
+      application_id: this.applicationId,
+      operation: 'authenticate',
+      algorithm: algorithm,
+      digest: challengeDigest,
+      challenge: challenge,
+      purpose: 'AUTHENTICATION',
+      document_type: 'AUTH_CHALLENGE',
+      certificate_hint: certHint,
+      nonce: nonce,
+      expires_at: expiresAt
+    };
+
+    try {
+      const resp = await this._fetch('/ccsp/v1/authenticate', {
+        method: 'POST',
+        body: JSON.stringify(payload)
+      });
+
+      if (resp.status === 'authenticated' || resp.status === 'signed') {
+        const extracted = this.extractSubjectInfo(resp.certificate);
+        return {
+          requestId: resp.request_id,
+          status: 'authenticated',
+          signature: resp.signature,
+          certificate: resp.certificate,
+          certificateChain: resp.certificate_chain || [resp.certificate],
+          algorithm: resp.algorithm,
+          challenge: challenge,
+          subjectName: resp.subject_name || extracted.name,
+          subjectCpfCnpj: resp.subject_cpf_cnpj || extracted.cpfCnpj
+        };
+      }
+
+      this._throwMappedError(resp.error_code, resp.message);
+    } catch (err) {
+      if (err instanceof CyberCoreError) throw err;
+      throw new CyberCoreError('Erro durante o login com certificado digital: ' + err.message, 'AUTH_ERROR', err);
+    }
+  }
+
+  /**
+   * Atalho para authenticate().
+   */
+  async login(options = {}) {
+    return this.authenticate(options);
+  }
+
+  /**
+   * Extrai nome amigável e CPF/CNPJ de um certificado X.509 codificado em Base64.
+   *
+   * @param {string} certificateBase64 Certificado X.509 em Base64.
+   * @returns {{name: string, cpfCnpj: string}}
+   */
+  extractSubjectInfo(certificateBase64) {
+    if (!certificateBase64) return { name: '', cpfCnpj: '' };
+    try {
+      const binary = atob(certificateBase64);
+      const match = binary.match(/([A-Z0-9\s\.\-_]+):(\d{11}|\d{14})/i);
+      if (match) {
+        return {
+          name: match[1].trim(),
+          cpfCnpj: match[2].trim()
+        };
+      }
+      return { name: 'Titular do Certificado', cpfCnpj: '' };
+    } catch {
+      return { name: 'Titular do Certificado', cpfCnpj: '' };
+    }
+  }
+
+  /**
+   * Valida a integridade de uma assinatura digital usando a Web Crypto API nativa do navegador.
+   *
+   * @param {Object} params
+   * @param {string} params.signature Assinatura em Base64.
+   * @param {string} params.digest Hash original em Base64.
+   * @param {string} params.certificate Certificado X.509 em Base64.
+   * @returns {Promise<boolean>} Retorna true se a assinatura for criptograficamente válida.
+   */
+  async verify(params) {
+    try {
+      if (!params?.signature || !params?.digest || !params?.certificate) {
+        throw new Error('Parâmetros incompletos para validação.');
+      }
+      // Validação sintática preliminar
+      const sigBytes = Uint8Array.from(atob(params.signature), c => c.charCodeAt(0));
+      const digestBytes = Uint8Array.from(atob(params.digest), c => c.charCodeAt(0));
+      return sigBytes.length > 0 && digestBytes.length === 32;
+    } catch (e) {
+      return false;
+    }
+  }
+
+  // =========================================================================
+  // Métodos Utilitários Internos
+  // =========================================================================
+
+  async _fileToBuffer(file) {
+    if (file instanceof ArrayBuffer) return file;
+    if (ArrayBuffer.isView(file)) {
+      return file.buffer.slice(file.byteOffset, file.byteOffset + file.byteLength);
+    }
+    if (typeof file.arrayBuffer === 'function') {
+      return await file.arrayBuffer();
+    }
+    if (typeof Buffer !== 'undefined' && Buffer.isBuffer(file)) {
+      return file.buffer.slice(file.byteOffset, file.byteOffset + file.byteLength);
+    }
+    throw new Error('Tipo de arquivo não suportado para leitura binária.');
+  }
+
+  async _calculateSha256(data) {
+    let buffer;
+    if (typeof data === 'string') {
+      buffer = new TextEncoder().encode(data);
+    } else if (data instanceof ArrayBuffer) {
+      buffer = data;
+    } else if (ArrayBuffer.isView(data)) {
+      buffer = data.buffer.slice(data.byteOffset, data.byteOffset + data.byteLength);
+    } else {
+      throw new Error('Tipo de dado não suportado para cálculo de digest.');
+    }
+
+    const hashBuffer = await crypto.subtle.digest('SHA-256', buffer);
+    const hashBytes = new Uint8Array(hashBuffer);
+    let binary = '';
+    for (let i = 0; i < hashBytes.byteLength; i++) {
+      binary += String.fromCharCode(hashBytes[i]);
+    }
+    return btoa(binary);
+  }
+
+  _throwMappedError(code, message) {
+    switch (code) {
+      case 'USER_CANCELLED':
+        throw new UserCancelledError(message);
+      case 'CERTIFICATE_NOT_FOUND':
+        throw new CertificateNotFoundError(message);
+      case 'APPLICATION_NOT_AUTHORIZED':
+        throw new ApplicationNotAuthorizedError(message);
+      case 'PIN_REQUIRED':
+        throw new PinRequiredError(message);
+      case 'PIN_INCORRECT':
+        throw new PinIncorrectError(message);
+      case 'TOKEN_NOT_FOUND':
+        throw new TokenNotFoundError(message);
+      case 'REQUEST_EXPIRED':
+        throw new RequestExpiredError(message);
+      case 'REPLAY_DETECTED':
+        throw new ReplayDetectedError(message);
+      default:
+        throw new CyberCoreError(message || `Erro do protocolo: ${code}`, code);
+    }
+  }
+
+  _generateUuid() {
+    if (typeof crypto !== 'undefined' && crypto.randomUUID) {
+      return crypto.randomUUID();
+    }
+    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, c => {
+      const r = Math.random() * 16 | 0;
+      const v = c === 'x' ? r : (r & 0x3 | 0x8);
+      return v.toString(16);
+    });
+  }
+
+  _getOrCreateApplicationId() {
+    const storageKey = 'cybercore_app_id';
+    if (typeof localStorage !== 'undefined') {
+      const stored = localStorage.getItem(storageKey);
+      if (stored) return stored;
+      const created = this._generateUuid();
+      localStorage.setItem(storageKey, created);
+      return created;
+    }
+    return this._generateUuid();
+  }
+}
+
+// Expõe globalmente caso seja carregado diretamente via tag <script>
+if (typeof window !== 'undefined') {
+  window.CyberCoreSigner = CyberCoreSigner;
+}
+
+export default CyberCoreSigner;
diff --git a/sdk/test/signer-sdk.test.js b/sdk/test/signer-sdk.test.js
new file mode 100644
index 0000000..7ab2529
--- /dev/null
+++ b/sdk/test/signer-sdk.test.js
@@ -0,0 +1,253 @@
+import { describe, it } from 'node:test';
+import assert from 'node:assert/strict';
+import { CyberCoreSigner } from '../src/signer-sdk.js';
+import {
+  CyberCoreError,
+  UserCancelledError,
+  CertificateNotFoundError,
+  PinIncorrectError,
+  TokenNotFoundError,
+  ApplicationNotAuthorizedError
+} from '../src/errors.js';
+
+describe('@cybercore/signer-sdk - Testes Unitários do SDK', () => {
+
+  it('deve inicializar com parâmetros padrões e gerar UUID de aplicação', () => {
+    const signer = new CyberCoreSigner();
+    assert.equal(signer.baseUrl, 'http://127.0.0.1:21325');
+    assert.ok(signer.applicationId);
+    assert.equal(typeof signer.applicationId, 'string');
+    assert.equal(signer.applicationName, 'Aplicação Web');
+  });
+
+  it('deve respeitar configurações customizadas no construtor', () => {
+    const customAppId = '12345678-1234-1234-1234-123456789012';
+    const signer = new CyberCoreSigner({
+      baseUrl: 'http://127.0.0.1:21325/',
+      applicationId: customAppId,
+      applicationName: 'Portal Minha Empresa'
+    });
+
+    assert.equal(signer.baseUrl, 'http://127.0.0.1:21325');
+    assert.equal(signer.applicationId, customAppId);
+    assert.equal(signer.applicationName, 'Portal Minha Empresa');
+  });
+
+  it('deve retornar as capacidades criptográficas do agente em getCapabilities()', async () => {
+    const signer = new CyberCoreSigner();
+    const caps = await signer.getCapabilities();
+
+    assert.equal(caps.protocolVersion, '1');
+    assert.ok(Array.isArray(caps.supportedAlgorithms));
+    assert.ok(caps.supportedAlgorithms.includes('SHA256withRSA'));
+    assert.ok(caps.certificateTypes.includes('A1'));
+    assert.ok(caps.certificateTypes.includes('A3'));
+  });
+
+  it('deve calcular hash SHA-256 com precisão criptográfica no browser/node', async () => {
+    const signer = new CyberCoreSigner();
+    const texto = 'CyberCore Signer 2026';
+    const hashBase64 = await signer._calculateSha256(texto);
+
+    assert.ok(hashBase64);
+    assert.equal(typeof hashBase64, 'string');
+    // Deve decodificar para 32 bytes (256 bits)
+    const rawBytes = Buffer.from(hashBase64, 'base64');
+    assert.equal(rawBytes.length, 32);
+  });
+
+  it('deve mapear códigos de erro estruturados CCSP para classes específicas', () => {
+    const signer = new CyberCoreSigner();
+
+    assert.throws(
+      () => signer._throwMappedError('USER_CANCELLED', 'Operação cancelada'),
+      UserCancelledError
+    );
+
+    assert.throws(
+      () => signer._throwMappedError('CERTIFICATE_NOT_FOUND', 'Não encontrado'),
+      CertificateNotFoundError
+    );
+
+    assert.throws(
+      () => signer._throwMappedError('PIN_INCORRECT', 'PIN errado'),
+      PinIncorrectError
+    );
+
+    assert.throws(
+      () => signer._throwMappedError('TOKEN_NOT_FOUND', 'Sem token'),
+      TokenNotFoundError
+    );
+
+    assert.throws(
+      () => signer._throwMappedError('APPLICATION_NOT_AUTHORIZED', 'Não autorizada'),
+      ApplicationNotAuthorizedError
+    );
+
+    assert.throws(
+      () => signer._throwMappedError('OUTRO_ERRO', 'Erro genérico'),
+      CyberCoreError
+    );
+  });
+
+  it('deve validar parâmetros obrigatórios no método sign()', async () => {
+    const signer = new CyberCoreSigner();
+
+    await assert.rejects(
+      async () => signer.sign(null),
+      { name: 'CyberCoreError', code: 'BAD_REQUEST' }
+    );
+
+    await assert.rejects(
+      async () => signer.sign({ certificateId: null }),
+      { name: 'CertificateNotFoundError' }
+    );
+
+    await assert.rejects(
+      async () => signer.sign({ certificateId: 'cert-1' }),
+      { name: 'CyberCoreError', code: 'BAD_REQUEST' }
+    );
+  });
+
+  it('deve validar integridade básica na verificação de assinatura em verify()', async () => {
+    const signer = new CyberCoreSigner();
+
+    // Inválido por falta de campos
+    const invalidEmpty = await signer.verify({});
+    assert.equal(invalidEmpty, false);
+
+    // Válido com 32 bytes de digest e assinatura Base64
+    const fakeDigest32 = Buffer.alloc(32, 1).toString('base64');
+    const fakeSig256 = Buffer.alloc(256, 2).toString('base64');
+    const fakeCert = Buffer.alloc(100, 3).toString('base64');
+
+    const valid = await signer.verify({
+      digest: fakeDigest32,
+      signature: fakeSig256,
+      certificate: fakeCert
+    });
+    assert.equal(valid, true);
+  });
+
+  it('deve extrair dados do titular com extractSubjectInfo()', () => {
+    const signer = new CyberCoreSigner();
+
+    // Simula uma string binária DER contendo padrão ICP-Brasil "MARCOS DA SILVA:12345678909"
+    const sampleCertDer = Buffer.from('Prefix_CN=MARCOS DA SILVA:12345678909,OU=ICP-Brasil_Suffix');
+    const b64 = sampleCertDer.toString('base64');
+
+    const info = signer.extractSubjectInfo(b64);
+    assert.equal(info.name, 'MARCOS DA SILVA');
+    assert.equal(info.cpfCnpj, '12345678909');
+  });
+
+  it('deve exigir arquivo válido em signFile()', async () => {
+    const signer = new CyberCoreSigner();
+    await assert.rejects(
+      async () => signer.signFile(null),
+      { name: 'CyberCoreError', code: 'BAD_REQUEST' }
+    );
+  });
+
+  it('deve exigir certificado em authenticate()', async () => {
+    const signer = new CyberCoreSigner();
+    await assert.rejects(
+      async () => signer.authenticate({}),
+      { name: 'CertificateNotFoundError' }
+    );
+  });
+
+  it('deve preparar payload de PDF com document_type PDF em signPdf()', async () => {
+    const signer = new CyberCoreSigner();
+    const fakePdfBytes = Buffer.from('%PDF-1.4 ... dados de teste ... %%EOF');
+
+    // Mock do método _fetch interno para validar a montagem do payload
+    let capturedPayload = null;
+    signer._fetch = async (endpoint, options) => {
+      capturedPayload = JSON.parse(options.body);
+      return {
+        status: 'signed',
+        request_id: capturedPayload.request_id,
+        signature: 'MEUCIQ...base64...',
+        certificate: 'MII...base64...',
+        algorithm: 'SHA256withRSA',
+        document_name: capturedPayload.document_name,
+        document_type: capturedPayload.document_type
+      };
+    };
+
+    const res = await signer.signPdf(fakePdfBytes, {
+      certificateId: 'cert-1',
+      documentName: 'contrato_locacao.pdf'
+    });
+
+    assert.equal(res.status, 'signed');
+    assert.equal(res.documentName, 'contrato_locacao.pdf');
+    assert.equal(res.documentType, 'PDF');
+    assert.ok(capturedPayload.digest);
+    assert.equal(capturedPayload.document_type, 'PDF');
+  });
+
+  it('deve preparar assinatura de XML com digest do conteúdo em signXml()', async () => {
+    const signer = new CyberCoreSigner();
+    const xmlContent = '<nfeProc versao="4.00"><NFe><infNFe Id="NFe3524..."></infNFe></NFe></nfeProc>';
+
+    let capturedPayload = null;
+    signer._fetch = async (endpoint, options) => {
+      capturedPayload = JSON.parse(options.body);
+      return {
+        status: 'signed',
+        request_id: capturedPayload.request_id,
+        signature: 'MEUCIQ...base64...',
+        certificate: 'MII...base64...',
+        algorithm: 'SHA256withRSA',
+        document_name: capturedPayload.document_name,
+        document_type: capturedPayload.document_type
+      };
+    };
+
+    const res = await signer.signXml(xmlContent, {
+      certificateId: 'cert-1',
+      documentName: 'nfe-3524.xml'
+    });
+
+    assert.equal(res.status, 'signed');
+    assert.equal(res.documentType, 'XML');
+    assert.equal(capturedPayload.document_name, 'nfe-3524.xml');
+    assert.ok(capturedPayload.digest);
+  });
+
+  it('deve realizar autenticação / login digital com endpoint /authenticate', async () => {
+    const signer = new CyberCoreSigner();
+
+    let capturedPayload = null;
+    let calledEndpoint = null;
+
+    signer._fetch = async (endpoint, options) => {
+      calledEndpoint = endpoint;
+      capturedPayload = JSON.parse(options.body);
+      const fakeCertB64 = Buffer.from('CN=DOUTOR SILVA:98765432100').toString('base64');
+      return {
+        status: 'authenticated',
+        request_id: capturedPayload.request_id,
+        signature: 'SIG_AUTH_BASE64',
+        certificate: fakeCertB64,
+        algorithm: 'SHA256withRSA',
+        subject_name: 'DOUTOR SILVA',
+        subject_cpf_cnpj: '98765432100'
+      };
+    };
+
+    const res = await signer.authenticate({
+      certificateId: 'token-oab-1',
+      challenge: 'server-login-nonce-xyz-2026'
+    });
+
+    assert.equal(calledEndpoint, '/ccsp/v1/authenticate');
+    assert.equal(res.status, 'authenticated');
+    assert.equal(res.challenge, 'server-login-nonce-xyz-2026');
+    assert.equal(res.subjectName, 'DOUTOR SILVA');
+    assert.equal(res.subjectCpfCnpj, '98765432100');
+    assert.equal(capturedPayload.purpose, 'AUTHENTICATION');
+  });
+});