/* ==============================================================================
   TREINAR SERVIÇOS - ESPECIALISTA EM PROJETOS DE AUTOMAÇÃO INDUSTRIAL
   ESTILOS MOBILE-FIRST (WCAG AA, TEMA ESCURO #000000)
   ============================================================================== */

:root {
  --bg-primary: #000000;
  --bg-surface: #121212;
  --bg-surface-elevated: #1e1e1e;
  --bg-surface-hover: #2a2a2a;
  --border-subtle: #2d2d2d;
  --border-focus: #00e5ff;
  
  --text-primary: #f0f0f0;
  --text-secondary: #a0a0a0;
  --text-muted: #707070;
  
  --brand-cyan: #00e5ff;
  --brand-cyan-dark: #00b0c7;
  --brand-orange: #ff9100;
  --color-danger: #ff5252;
  --color-danger-hover: #d32f2f;
  --color-success: #00e676;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --max-width-content: 860px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Evitar rolagem horizontal na tela toda */
body {
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Foco visível de acessibilidade */
:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

/* ==============================================================================
   LAYOUT GERAL
   ============================================================================== */

.app-layout {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 100%;
  margin: 0 auto;
}

/* ==============================================================================
   CABEÇALHO
   ============================================================================== */

.app-header {
  flex-shrink: 0;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: 10px 16px;
  z-index: 20;
}

.header-container {
  max-width: var(--max-width-content);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-logo {
  width: 36px;
  height: 36px;
  object-fit: contain;
  flex-shrink: 0;
}

.brand-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand-title {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-subtitle {
  font-size: 0.78rem;
  color: var(--brand-cyan);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* ==============================================================================
   BOTÕES GERAIS
   ============================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px 12px;
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
  white-space: nowrap;
  user-select: none;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--brand-cyan);
  color: #000000;
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--brand-cyan-dark);
}

.btn-secondary {
  background-color: var(--bg-surface-elevated);
  border-color: var(--border-subtle);
  color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--bg-surface-hover);
  border-color: #444;
}

.btn-danger-outline {
  background-color: transparent;
  border-color: var(--border-subtle);
  color: #ff8a80;
}

.btn-danger-outline:hover:not(:disabled) {
  background-color: rgba(255, 82, 82, 0.12);
  border-color: var(--color-danger);
  color: #ff5252;
}

.btn-stop {
  background-color: rgba(255, 82, 82, 0.15);
  border-color: var(--color-danger);
  color: #ff5252;
}

.btn-stop:hover {
  background-color: var(--color-danger);
  color: #ffffff;
}

/* ==============================================================================
   ÁREA DE MENSAGENS (CHAT)
   ============================================================================== */

.chat-main {
  flex: 1;
  overflow-y: auto;
  padding: 16px 16px 24px;
  scroll-behavior: smooth;
  display: flex;
  flex-direction: column;
}

.chat-messages {
  max-width: var(--max-width-content);
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.message {
  display: flex;
  gap: 12px;
  width: 100%;
  max-width: 100%;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.message-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}

.message-assistant .message-avatar {
  background: linear-gradient(135deg, #00e5ff 0%, #0077b6 100%);
  color: #000000;
}

.message-user {
  flex-direction: row-reverse;
}

.message-user .message-avatar {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.message-content {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: calc(100% - 44px);
  min-width: 0;
}

.message-body {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  line-height: 1.6;
  word-break: break-word;
}

.message-assistant .message-body {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.message-user .message-body {
  background-color: #1a2730;
  border: 1px solid #1e3a4b;
  color: #ffffff;
}

/* Indicador de Digitação / Streaming */
.streaming-indicator {
  display: inline-block;
  width: 8px;
  height: 16px;
  background-color: var(--brand-cyan);
  vertical-align: middle;
  margin-left: 4px;
  animation: pulseBlink 0.8s infinite;
}

@keyframes pulseBlink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.2; }
}

/* ==============================================================================
   BLOCO DE CHIPS DE INÍCIO RÁPIDO
   ============================================================================== */

.starter-chips-container {
  margin: 8px 0 16px 44px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chips-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.chips-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

@media (min-width: 600px) {
  .chips-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.chip-btn {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 10px 14px;
  border-radius: var(--radius-lg);
  font-size: 0.85rem;
  text-align: left;
  line-height: 1.4;
  cursor: pointer;
  transition: all 0.15s ease;
}

.chip-btn:hover {
  background-color: var(--bg-surface-elevated);
  border-color: var(--brand-cyan);
  color: #ffffff;
  transform: translateY(-1px);
}

/* ==============================================================================
   MARKDOWN: TABELAS, CÓDIGO, LISTAS
   ============================================================================== */

.message-body p {
  margin-bottom: 0.75rem;
}

.message-body p:last-child {
  margin-bottom: 0;
}

.message-body ul, .message-body ol {
  margin: 0.5rem 0 0.75rem 1.4rem;
}

.message-body li {
  margin-bottom: 0.35rem;
}

.message-body strong {
  color: #ffffff;
}

/* Rolagem horizontal obrigatória para tabelas no celular */
.table-container {
  width: 100%;
  overflow-x: auto;
  margin: 12px 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background-color: #0c0c0c;
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  text-align: left;
  min-width: 480px; /* Garante estrutura limpa em telas estreitas com scroll */
}

th, td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--border-subtle);
}

th {
  background-color: var(--bg-surface-elevated);
  color: var(--brand-cyan);
  font-weight: 600;
  white-space: nowrap;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background-color: rgba(255, 255, 255, 0.02);
}

/* Blocos de código com botão de cópia */
.code-block-wrapper {
  margin: 12px 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background-color: #0d0d0d;
  overflow: hidden;
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.code-lang {
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.btn-copy-code {
  background: none;
  border: none;
  color: var(--brand-cyan);
  font-size: 0.75rem;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
}

.btn-copy-code:hover {
  background-color: rgba(0, 229, 255, 0.1);
}

pre {
  padding: 12px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.45;
}

code {
  font-family: var(--font-mono);
}

:not(pre) > code {
  background-color: var(--bg-surface-elevated);
  color: #ffab40;
  padding: 2px 5px;
  border-radius: 4px;
  font-size: 0.85em;
}

/* ==============================================================================
   FONTES E GROUNDING DO GOOGLE SEARCH
   ============================================================================== */

.message-sources {
  margin-top: 8px;
  padding: 10px 12px;
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
}

.sources-title {
  font-weight: 600;
  color: var(--brand-cyan);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.sources-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.source-link {
  color: #80d8ff;
  text-decoration: none;
  word-break: break-all;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.source-link:hover {
  text-decoration: underline;
  color: #ffffff;
}

/* Sugestões de Busca do Google (searchEntryPoint obrigatório quando retornado) */
.message-search-entrypoint {
  margin-top: 8px;
  padding: 8px 12px;
  background-color: #0f1418;
  border: 1px solid #1a2d3d;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
}

/* ==============================================================================
   BARRA DE ENTRADA FIXA E RODAPÉ
   ============================================================================== */

.chat-footer-wrapper {
  flex-shrink: 0;
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-subtle);
  padding: 10px 16px 14px;
  z-index: 20;
}

.chat-input-container {
  max-width: var(--max-width-content);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.input-wrapper {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color 0.15s ease;
}

.input-wrapper:focus-within {
  border-color: var(--brand-cyan);
}

textarea#chat-textarea {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  line-height: 1.45;
  resize: none;
  max-height: 160px;
  min-height: 24px;
  outline: none;
}

textarea#chat-textarea::placeholder {
  color: var(--text-muted);
}

.input-bottom-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 4px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.char-counter {
  font-size: 0.72rem;
  color: var(--text-muted);
  user-select: none;
}

.char-counter.warning {
  color: var(--brand-orange);
}

.char-counter.limit {
  color: var(--color-danger);
}

.input-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ==============================================================================
   DISCLAIMER E WHATSAPP
   ============================================================================== */

.disclaimer-container {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 2px;
}

.disclaimer-text {
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.35;
  text-align: center;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: underline;
}

.footer-link:hover {
  color: var(--brand-cyan);
}

.whatsapp-support {
  display: flex;
  justify-content: center;
}

.whatsapp-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: #25d366;
  text-decoration: none;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  transition: background-color 0.15s ease;
}

.whatsapp-link:hover {
  background-color: rgba(37, 211, 102, 0.1);
  text-decoration: underline;
}

/* ==============================================================================
   MODAL DE CONFIRMAÇÃO
   ============================================================================== */

.modal {
  margin: auto;
  border: none;
  background: transparent;
  padding: 16px;
  max-width: 440px;
  width: 90%;
}

.modal::backdrop {
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(2px);
}

.modal-box {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.modal-title {
  font-size: 1.1rem;
  color: #ffffff;
}

.modal-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 8px;
}

.btn-danger {
  background-color: var(--color-danger);
  color: #ffffff;
}

.btn-danger:hover {
  background-color: var(--color-danger-hover);
}

/* ==============================================================================
   RESPONSIVIDADE (MOBILE 360PX+)
   ============================================================================== */

@media (max-width: 480px) {
  .app-header {
    padding: 8px 12px;
  }

  .brand-logo {
    width: 30px;
    height: 30px;
  }

  .brand-title {
    font-size: 0.9rem;
  }

  .brand-subtitle {
    font-size: 0.72rem;
  }

  .btn-text {
    display: none; /* Mantém apenas o ícone em telas muito pequenas */
  }

  .starter-chips-container {
    margin-left: 0;
  }

  .message-content {
    max-width: calc(100% - 36px);
  }

  .message-body {
    padding: 10px 12px;
    font-size: 0.9rem;
  }
}