/* ============================================
   ESTILOS PARA MATHJAX - FÓRMULAS MATEMÁTICAS
   ============================================ */

/* Fórmulas inline */
.message-content mjx-container {
  display: inline-block !important;
  margin: 0 4px;
  line-height: 1.5;
  visibility: visible !important;
  opacity: 1 !important;
  color: inherit;
  min-width: 1px; /* avoid zero-width collapse */
}

/* Elementos gerados pelo restaurador de LaTeX */
.message-content .math-inline {
  display: inline-block !important;
  vertical-align: baseline;
  white-space: normal;
  min-width: 20px;
  min-height: 1em;
  visibility: visible !important;
  opacity: 1 !important;
  background: transparent;
  color: inherit;
}

.message-content .math-display {
  display: block !important;
  width: auto;
  overflow-x: auto;
  margin: 12px 0 !important;
  padding: 8px 0;
  text-align: center;
  visibility: visible !important;
  opacity: 1 !important;
  background: transparent;
  color: inherit;
  min-height: 1.5em;
}

.message-content .math-inline[data-latex] {
  /* garantir que o texto com $...$ é visível antes e depois do MathJax */
  color: inherit;
  visibility: visible !important;
  opacity: 1 !important;
}

/* Fórmulas em bloco (display mode) */
.message-content mjx-container[display="true"],
.message-content .math-display mjx-container {
  display: block !important;
  margin: 12px auto !important;
  padding: 8px 0 !important;
  text-align: center !important;
  overflow: visible !important;
  overflow-x: auto;
  overflow-y: visible;
  visibility: visible !important;
  opacity: 1 !important;
  width: 100% !important;
  max-width: 100% !important;
  background: transparent !important;
  color: inherit !important;
  position: relative !important;
  z-index: 1 !important;
}

/* Melhorar renderização de texto matemático */
.message-content mjx-math {
  font-size: 1.05em;
  line-height: 1.4;
  visibility: visible !important;
  opacity: 1 !important;
  display: block !important;
  margin: 0 auto !important;
}

/* Garantir que todos os elementos MathJax são visíveis */
.message-content mjx-container * {
  visibility: visible !important;
  opacity: 1 !important;
  overflow: visible !important;
}

/* Elementos internos de MathJax - números, operadores, caracteres */
.message-content mjx-mn,
.message-content mjx-mo,
.message-content mjx-mi,
.message-content mjx-c,
.message-content mjx-mrow,
.message-content mjx-mfrac,
.message-content mjx-msqrt,
.message-content mjx-msup,
.message-content mjx-msub,
.message-content mjx-mspace {
  display: inline-block !important;
  visibility: visible !important;
  opacity: 1 !important;
  position: relative !important;
  z-index: auto !important;
}

/* Espaçamento e visibilidade para frações */
.message-content mjx-mfrac {
  display: inline-block !important;
  visibility: visible !important;
  opacity: 1 !important;
  margin: 0 2px;
  line-height: 1.2;
  position: relative;
  z-index: 1;
  vertical-align: middle;
}

/* Linhas horizontais em frações (a barra de divisão) */
.message-content mjx-mfrac mjx-line {
  display: block !important;
  visibility: visible !important;
  opacity: 1 !important;
  height: auto !important;
  overflow: visible !important;
  position: relative;
}

/* Garantir que os numerador e denominador são visíveis */
.message-content mjx-mfrac > mjx-mrow {
  display: block !important;
  visibility: visible !important;
  opacity: 1 !important;
  overflow: visible !important;
  position: relative;
}

/* SVG ou canvas dentro de frações */
.message-content mjx-mfrac svg,
.message-content mjx-mfrac canvas,
.message-content mjx-mfrac g {
  visibility: visible !important;
  opacity: 1 !important;
  overflow: visible !important;
}

/* Força extra para linhas de fração - com border visível */
.message-content mjx-mfrac mjx-line {
  border-bottom: 1.5px solid currentColor !important;
  display: block !important;
  margin: 2px 0 !important;
  height: 1px !important;
  overflow: visible !important;
}

/* Forçar visibilidade de todos os filhos de mfrac */
.message-content mjx-mfrac * {
  visibility: visible !important;
  opacity: 1 !important;
  overflow: visible !important;
}

/* Se MathJax usa elementos de texto para renderizar a barra */
.message-content mjx-mfrac [role="presentation"] {
  visibility: visible !important;
  opacity: 1 !important;
}

.message-content mjx-msqrt {
  margin: 0 2px;
}

.message-content mjx-msup,
.message-content mjx-msub {
  margin: 0 1px;
}

/* Melhorar legibilidade em dark mode */
[data-theme="dark"] .message-content mjx-container {
  color: var(--text-primary);
  filter: brightness(1.1);
}

[data-theme="light"] .message-content mjx-container {
  color: var(--text-primary);
}

/* Espaçamento para equações complexas */
.message-content mjx-container[display="true"] {
  padding: 12px 0 !important;
  border-left: 3px solid var(--accent-color);
  padding-left: 12px;
  margin-left: 0;
  border-radius: 4px;
  background: rgba(16, 163, 127, 0.05);
}

[data-theme="dark"] .message-content mjx-container[display="true"] {
  background: rgba(16, 163, 127, 0.08);
}

/* Código LaTeX (antes de renderizar) - Fallback */
code {
  background: rgba(0, 0, 0, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
  font-size: 0.9em;
}

[data-theme="dark"] code {
  background: rgba(255, 255, 255, 0.1);
}

/* Melhorar visualização de títulos em mensagens */
.message-content h2,
.message-content h3,
.message-content h4 {
  color: var(--text-primary);
  margin: 12px 0 8px 0;
  font-weight: 700;
  line-height: 1.4;
}

/* Parágrafos nas mensagens */
.message-content p {
  margin: 8px 0;
  line-height: 1.6;
  color: var(--text-primary);
}

/* Melhorar visualização de listas */
.message-content ul,
.message-content ol {
  margin: 8px 0;
  padding-left: 24px;
  line-height: 1.6;
}

.message-content li {
  margin: 4px 0;
  color: var(--text-primary);
}

/* Fallback para quando MathJax falha ou não carrega */
.message-content mjx-merror {
  background: #ffcccc;
  padding: 4px 8px;
  border-radius: 4px;
  color: #cc0000;
  font-family: monospace;
  font-size: 0.9em;
  display: inline-block;
  margin: 2px 4px;
}

/* Suporte para longas expressões matemáticas */
@media (max-width: 768px) {
  .message-content mjx-container[display="true"] {
    font-size: 0.95em;
    overflow-x: auto;
    padding-left: 8px;
    border-left-width: 2px;
  }
}

/* ============================================
   FALLBACK VISÍVEL PARA MATH (quando MathJax falha)
   ============================================ */
.message-content .math-fallback-visible {
  display: inline-block !important;
  background: rgba(255, 235, 205, 0.08);
  color: var(--text-primary);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, 'Courier New', monospace;
  font-size: 0.95em;
  line-height: 1.4;
  white-space: pre-wrap;
}

.message-content .math-display-fallback {
  display: block !important;
  width: 100%;
  padding: 8px 12px;
  margin: 8px 0;
  background: rgba(16, 163, 127, 0.05);
  border-left: 3px solid var(--accent-color);
  border-radius: 4px;
  white-space: pre-wrap;
  font-family: ui-monospace, 'Courier New', monospace;
}

[data-theme="dark"] .message-content .math-fallback-visible {
  background: rgba(255,255,255,0.03);
  color: var(--text-primary);
}

[data-theme="dark"] .message-content .math-display-fallback {
  background: rgba(16, 163, 127, 0.06);
}

/* ============================================
   ESTILOS PARA DOCUMENTOS
   ============================================ */

/* Preview de documentos melhorado */
.file-preview {
  position: relative;
  display: inline-block;
  margin: 8px 0;
  border-radius: 8px;
  overflow: hidden;
  background: var(--button-hover);
  padding: 8px 12px;
}

.file-preview-text {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--message-bot-bg);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 0.9em;
  border: 1px solid var(--border-color);
}

.file-preview-text::before {
  content: "📄";
  font-size: 1.2em;
}

/* Animação de upload em progresso */
@keyframes upload-pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

.file-preview.uploading {
  animation: upload-pulse 1.5s ease-in-out infinite;
}

/* ============================================
   INPUT AREA - POSICIONAMENTO
   ============================================ */

.chat-input-area {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}

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

.discipline-select {
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-primary);
  color: var(--text-primary);
  cursor: pointer;
  font-size: 0.9em;
}

.type-buttons {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.type-btn {
  padding: 6px 10px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.85em;
  transition: all 0.2s;
}

.type-btn:hover {
  background: var(--button-hover);
  color: var(--text-primary);
}

.type-btn.active {
  background: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

/* ============================================
   PREVIEW - POSICIONAMENTO CRÍTICO
   ============================================ */

.file-preview {
  position: relative;
  display: block;
  margin: 8px 0;
  padding: 10px;
  background: var(--button-hover);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  max-height: 250px;
  overflow: auto;
  width: 100%;
  box-sizing: border-box;
}

.file-preview[style*="display: none"] {
  display: none !important;
}

.file-preview[style*="display: block"],
.file-preview:not([style*="display"]) {
  display: block !important;
}

.file-preview img {
  display: block;
  max-width: 100%;
  max-height: 150px;
  border-radius: 6px;
  margin-bottom: 8px;
  object-fit: contain;
}

.file-preview-info {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 8px;
  background: rgba(0, 0, 0, 0.05);
  border-radius: 6px;
  margin-bottom: 8px;
}

.file-preview-info[style*="display: flex"] {
  display: flex !important;
}

.file-preview-icon {
  font-size: 1.5em;
  flex-shrink: 0;
}

.file-preview-details {
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex-grow: 1;
  min-width: 0;
}

.file-preview-text {
  display: block;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.95em;
  word-break: break-word;
  margin: 0;
}

.file-preview-size {
  display: block;
  color: var(--text-secondary);
  font-size: 0.8em;
  margin: 0;
}

.remove-file-btn {
  position: absolute;
  top: 5px;
  right: 5px;
  width: 24px;
  height: 24px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: #ff4444;
  color: white;
  font-size: 1em;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
  z-index: 10;
}

.remove-file-btn:hover {
  background: #cc0000;
}

/* ============================================
   CHAT FORM
   ============================================ */

.chat-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.input-wrapper {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.message-input {
  flex: 1;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95em;
  resize: none;
  max-height: 120px;
  min-height: 40px;
}

.input-actions {
  display: flex;
  gap: 4px;
  align-items: center;
}

.action-btn {
  width: 36px;
  height: 36px;
  padding: 0;
  border: none;
  border-radius: 6px;
  background: var(--button-hover);
  color: var(--text-primary);
  cursor: pointer;
  font-size: 1.1em;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

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

.send-btn {
  width: 36px;
  height: 36px;
  padding: 0;
  border: none;
  border-radius: 6px;
  background: var(--accent-color);
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.send-btn:hover {
  background: var(--accent-color-hover);
  opacity: 0.8;
}

.input-hint {
  font-size: 0.75em;
  color: var(--text-secondary);
  text-align: center;
  margin: 0;
}

/* Melhor espaçamento para listas em respostas matemáticas */
.message-content ul {
  margin: 8px 0;
  padding-left: 24px;
}

.message-content li {
  margin: 4px 0;
  line-height: 1.6;
}

/* Melhor visualização de código/comandos */
.message-content code {
  word-break: break-word;
}

/* Suporte para tabelas (se Gemini enviar) */
.message-content table {
  border-collapse: collapse;
  margin: 12px 0;
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
}

.message-content th,
.message-content td {
  border: 1px solid var(--border-color);
  padding: 8px 12px;
  text-align: left;
}

.message-content th {
  background: var(--button-hover);
  font-weight: 600;
}

[data-theme="dark"] .message-content table {
  border-color: rgba(255, 255, 255, 0.2);
}

/* ============================================
   RESPONSIVO PARA MÓVEL
   ============================================ */

@media (max-width: 480px) {
  .message-content mjx-container {
    font-size: 0.95em;
  }
  
  .file-preview {
    width: 100%;
  }
  
  .file-preview-text {
    font-size: 0.85em;
  }
}

/* ============================================
   PREVIEW DE FICHEIRO/IMAGEM - MELHORADO (NOVO)
   ============================================ */

/* ============================================
   PREVIEW DE FICHEIRO/IMAGEM - MELHORADO (NOVO)
   ============================================ */

.file-preview {
  position: relative;
  display: none; /* Default: hidden */
  margin: 8px 0;
  padding: 10px;
  background: var(--button-hover);
  border-radius: 8px;
  border: 1px solid var(--border-color);
  overflow: auto;
  max-height: 250px;
  width: 100%;
  box-sizing: border-box;
}

/* Quando está visível (sem !important para permitir JS) */
.file-preview[style*="display: block"] {
  display: block;
}

.file-preview img {
  display: block;
  max-width: 100%;
  max-height: 200px;
  border-radius: 8px;
  margin-bottom: 8px;
  object-fit: contain;
}

.file-preview-info {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px;
  background: rgba(0, 0, 0, 0.05);
  border-radius: 6px;
  margin-bottom: 8px;
}

.file-preview-icon {
  font-size: 1.5em;
  flex-shrink: 0;
}

.file-preview-details {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex-grow: 1;
  min-width: 0;
}

.file-preview-text {
  display: block;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.95em;
  word-break: break-word;
}

.file-preview-size {
  display: block;
  color: var(--text-secondary);
  font-size: 0.85em;
}

.remove-file-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 28px;
  height: 28px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: #ff4444;
  color: white;
  font-size: 1.2em;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
  z-index: 10;
}

.remove-file-btn:hover {
  background: #cc0000;
}

/* Dark mode */
[data-theme="dark"] .file-preview-info {
  background: rgba(255, 255, 255, 0.1);
}