/**
 * Fijate Tools - Generador y solucionador de sudokus paso a paso
 * Estilos canónicos de la aplicación con temas claro y oscuro
 */

:root {
  --bg-main: #0b1320;
  --bg-card: #132238;
  --bg-card-hover: #1a2d4a;
  --bg-input: #0e1a2d;
  --bg-secondary: #172844;
  
  --border-color: #243b5e;
  --border-focus: #3b82f6;
  --border-subtle: rgba(255, 255, 255, 0.08);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-accent: #60a5fa;

  --accent-primary: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-success: #10b981;
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;

  /* Sudoku grid tokens */
  --grid-border-thick: #60a5fa;
  --grid-border-thin: #243b5e;
  --cell-bg-default: #132238;
  --cell-bg-clue: #0f1c30;
  --cell-bg-peer: rgba(59, 130, 246, 0.12);
  --cell-bg-selected: rgba(59, 130, 246, 0.32);
  --cell-bg-same-num: rgba(245, 158, 11, 0.22);
  --cell-bg-error: rgba(239, 68, 68, 0.28);
  --cell-bg-hint: rgba(16, 185, 129, 0.28);

  --cell-text-clue: #f8fafc;
  --cell-text-user: #93c5fd;
  --cell-text-notes: #94a3b8;
  --cell-text-error: #fca5a5;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-card: 0 4px 20px -2px rgba(0, 0, 0, 0.4);
}

[data-theme="light"] {
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-input: #f8fafc;
  --bg-secondary: #f1f5f9;

  --border-color: #cbd5e1;
  --border-focus: #2563eb;
  --border-subtle: rgba(0, 0, 0, 0.08);

  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-accent: #2563eb;

  --accent-primary: #2563eb;
  --accent-hover: #1d4ed8;

  /* Sudoku grid tokens light */
  --grid-border-thick: #1e3a8a;
  --grid-border-thin: #cbd5e1;
  --cell-bg-default: #ffffff;
  --cell-bg-clue: #f8fafc;
  --cell-bg-peer: rgba(37, 99, 235, 0.08);
  --cell-bg-selected: rgba(37, 99, 235, 0.22);
  --cell-bg-same-num: rgba(245, 158, 11, 0.18);
  --cell-bg-error: rgba(239, 68, 68, 0.2);
  --cell-bg-hint: rgba(16, 185, 129, 0.2);

  --cell-text-clue: #0f172a;
  --cell-text-user: #1d4ed8;
  --cell-text-notes: #64748b;
  --cell-text-error: #dc2626;

  --shadow-card: 0 4px 15px -2px rgba(0, 0, 0, 0.08);
}

/* Reset de contención canónica */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.5;
  overflow-x: clip;
  width: 100%;
  max-width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Layout */
.main-wrapper.tool-layout {
  max-width: 1200px;
  margin: 1.25rem auto 3rem;
  padding: 0 1rem;
  width: 100%;
  flex: 1;
}

.tool-with-sidebar {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  width: 100%;
}

.tool-main-content {
  flex: 1 1 0%;
  min-width: 0;
  width: 100%;
}

/* Selector de pestañas de modo (Segmented Control) */
.mode-tabs-container {
  display: flex;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.mode-tabs-nav {
  display: inline-flex;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  padding: 4px;
  gap: 4px;
  max-width: 100%;
}

.mode-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.4rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: 9999px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  min-height: 40px;
}

.mode-tab-btn:hover {
  color: var(--text-main);
}

.mode-tab-btn.active {
  background-color: var(--accent-primary);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.35);
}

/* Tarjeta principal de la herramienta */
.sudoku-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
  margin-bottom: 2rem;
}

/* Barra de control superior de juego */
.game-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  padding-bottom: 1.25rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* Desplegables accesibles conforme a Lección 208 */
.form-select {
  background-color: #0b1320;
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.5rem 2.5rem 0.5rem 0.85rem;
  font-size: 0.9rem;
  font-family: 'Inter', sans-serif;
  font-weight: 500;
  min-height: 40px;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: calc(100% - 12px) center;
  width: auto;
  max-width: 100%;
}

.form-select option {
  background-color: #132238;
  color: #f8fafc;
  padding: 10px;
}

.form-select optgroup {
  background-color: #0b1320;
  color: #60a5fa;
  font-weight: 700;
}

[data-theme="light"] .form-select {
  background-color: #ffffff;
  color: #0f172a;
  border-color: #cbd5e1;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
}

[data-theme="light"] .form-select option {
  background-color: #ffffff;
  color: #0f172a;
}

[data-theme="light"] .form-select optgroup {
  background-color: #f1f5f9;
  color: #2563eb;
}

/* Indicadores de telemetría de juego */
.stat-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.8rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  min-height: 40px;
}

.stat-badge svg {
  color: var(--text-muted);
}

.stat-badge-timer {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1rem;
  letter-spacing: 0.5px;
}

.btn-timer-toggle {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px;
  display: flex;
  align-items: center;
  transition: color 0.2s;
}

.btn-timer-toggle:hover {
  color: var(--text-main);
}

/* Botones estándar */
.btn-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  background-color: var(--bg-secondary);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.5rem 1rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 40px;
  transition: all 0.2s ease;
}

.btn-action:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-focus);
}

.btn-primary {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #ffffff;
}

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

/* Zona principal de Sudoku (Tablero 9x9 + Teclado) */
.sudoku-workspace {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: center;
  justify-items: center;
}

@media (min-width: 960px) {
  .sudoku-workspace {
    grid-template-columns: minmax(320px, 480px) 1fr;
    align-items: start;
  }
}

/* Cuadrícula 9x9 */
.sudoku-board-wrapper {
  position: relative;
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1 / 1;
  background-color: var(--cell-bg-default);
  border: 3px solid var(--grid-border-thick);
  border-radius: 8px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
  user-select: none;
  touch-action: manipulation;
}

.sudoku-grid {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  grid-template-rows: repeat(9, 1fr);
  width: 100%;
  height: 100%;
}

/* Celdas individuales */
.sudoku-cell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: clamp(1.1rem, 4.5vw, 1.85rem);
  font-weight: 700;
  border-right: 1px solid var(--grid-border-thin);
  border-bottom: 1px solid var(--grid-border-thin);
  background-color: var(--cell-bg-default);
  color: var(--cell-text-user);
  cursor: pointer;
  transition: background-color 0.12s ease;
  outline: none;
}

/* Bordes gruesos para cajas 3x3 */
.sudoku-cell:nth-child(3n) {
  border-right: 2.5px solid var(--grid-border-thick);
}

.sudoku-cell:nth-child(9n) {
  border-right: none;
}

.sudoku-cell[data-row="2"],
.sudoku-cell[data-row="5"] {
  border-bottom: 2.5px solid var(--grid-border-thick);
}

.sudoku-cell[data-row="8"] {
  border-bottom: none;
}

/* Estados de celda */
.sudoku-cell.cell-clue {
  background-color: var(--cell-bg-clue);
  color: var(--cell-text-clue);
  font-weight: 800;
}

.sudoku-cell.cell-peer {
  background-color: var(--cell-bg-peer);
}

.sudoku-cell.cell-same-number {
  background-color: var(--cell-bg-same-num);
}

.sudoku-cell.cell-selected {
  background-color: var(--cell-bg-selected);
  box-shadow: inset 0 0 0 2px var(--border-focus);
}

.sudoku-cell.cell-error {
  background-color: var(--cell-bg-error);
  color: var(--cell-text-error) !important;
  animation: cell-shake 0.3s ease;
}

.sudoku-cell.cell-hint-focus {
  background-color: var(--cell-bg-hint) !important;
  box-shadow: inset 0 0 0 2.5px var(--accent-success);
  animation: hint-pulse 1.5s infinite alternate ease-in-out;
}

@keyframes hint-pulse {
  0% { transform: scale(1); }
  100% { transform: scale(0.97); }
}

@keyframes cell-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-2px); }
  75% { transform: translateX(2px); }
}

/* Subcuadrícula 3x3 de candidatos / notas a lápiz */
.pencil-notes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  width: 100%;
  height: 100%;
  padding: 2px;
  pointer-events: none;
}

.pencil-note-num {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: clamp(8px, 1.8vw, 11px);
  font-weight: 600;
  color: var(--cell-text-notes);
  line-height: 1;
}

/* Overlay de pausa */
.board-pause-overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(11, 19, 32, 0.94);
  backdrop-filter: blur(8px);
  border-radius: 6px;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  z-index: 10;
}

[data-theme="light"] .board-pause-overlay {
  background-color: rgba(255, 255, 255, 0.94);
}

.board-pause-overlay.active {
  display: flex;
}

/* Panel lateral derecho: Teclado táctil y controles */
.sudoku-controls-panel {
  width: 100%;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Teclado numérico táctil (Dígitos 1-9) */
.keypad-grid {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: 6px;
  width: 100%;
}

@media (max-width: 580px) {
  .keypad-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

.btn-keypad-digit {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  padding: 0.4rem 0.2rem;
  min-height: 48px;
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: 'Outfit', sans-serif;
  user-select: none;
}

.btn-keypad-digit:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-focus);
}

.btn-keypad-digit:active {
  transform: translateY(1px);
}

.keypad-main-digit {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1;
}

.keypad-count-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.btn-keypad-digit.digit-completed {
  opacity: 0.35;
  cursor: default;
}

/* Botones de acción del teclado (Lápiz, Borrar, Deshacer, Pista) */
.keypad-actions-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  width: 100%;
}

.btn-keypad-action {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  padding: 0.6rem 0.25rem;
  min-height: 48px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.btn-keypad-action:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-focus);
}

.btn-keypad-action.active-toggle {
  background-color: #1e3a8a;
  border-color: #3b82f6;
  color: #93c5fd;
  box-shadow: 0 0 10px rgba(59, 130, 246, 0.4);
}

[data-theme="light"] .btn-keypad-action.active-toggle {
  background-color: #dbeafe;
  border-color: #2563eb;
  color: #1d4ed8;
}

/* Tarjeta informativa de pistas didácticas */
.hint-feedback-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent-success);
  border-radius: var(--radius-sm);
  padding: 1rem 1.15rem;
  display: none;
  flex-direction: column;
  gap: 0.5rem;
  animation: fadeIn 0.3s ease;
}

.hint-feedback-card.active {
  display: flex;
}

.hint-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.hint-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-success);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.hint-message {
  font-size: 0.9rem;
  color: var(--text-main);
  line-height: 1.5;
}

.hint-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

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

/* Vistas de Modo (Juego vs Solucionador) */
.view-mode-section {
  display: none;
  width: 100%;
}

.view-mode-section.active {
  display: block;
}

/* Barra de acciones para el modo solucionador */
.solver-actions-bar {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin-top: 1rem;
}

@media (min-width: 640px) {
  .solver-actions-bar {
    grid-template-columns: repeat(4, 1fr);
  }
}

.solver-instruction-box {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.solver-instruction-box strong {
  color: var(--text-main);
}

/* Modales Nativos fijate.com (Sin alerts) */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 1000;
}

.modal-overlay.active {
  display: flex;
}

.modal-dialog {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 520px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  animation: modalEnter 0.25s ease-out;
}

@keyframes modalEnter {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.modal-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  display: flex;
  transition: color 0.15s;
}

.modal-close-btn:hover {
  color: var(--text-main);
}

.modal-body {
  padding: 1.5rem;
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.6;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}

/* Modal de victoria */
.victory-content {
  text-align: center;
  padding: 1rem 0;
}

.victory-icon-box {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(16, 185, 129, 0.2));
  border: 2px solid var(--accent-success);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
  color: var(--accent-success);
}

.victory-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.victory-stat-item {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.5rem;
}

.victory-stat-val {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.victory-stat-lbl {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: capitalize;
  margin-top: 2px;
}

/* Toast flotante de avisos rápidos */
.toast-notice {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background-color: #1e293b;
  color: #f8fafc;
  border: 1px solid var(--border-color);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
  padding: 0.75rem 1.5rem;
  border-radius: 9999px;
  font-size: 0.92rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  z-index: 2000;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

.toast-notice.show {
  transform: translateX(-50%) translateY(0);
}

/* =========================================================================
   Sección didáctica SEO Canónica (.seo-guide-section conforme a Lección 223)
   ========================================================================= */
.seo-guide-section {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  box-shadow: var(--shadow-card);
  margin-top: 2.5rem;
}

.seo-guide-header {
  margin-bottom: 2rem;
  text-align: center;
}

.seo-authority-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background-color: rgba(37, 99, 235, 0.12);
  color: var(--accent-primary);
  border: 1px solid rgba(37, 99, 235, 0.25);
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.seo-guide-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 0.6rem;
}

.seo-guide-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 780px;
  margin: 0 auto;
}

.seo-guide-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 768px) {
  .seo-guide-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.seo-guide-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

.guide-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background-color: rgba(37, 99, 235, 0.15);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.seo-guide-card h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.75rem;
}

.seo-guide-card p {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 0.75rem;
}

.seo-guide-card p:last-child {
  margin-bottom: 0;
}

/* Tabla didáctica */
.guide-table-wrapper {
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
}

.guide-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  text-align: left;
}

.guide-table th {
  background-color: var(--bg-secondary);
  color: var(--text-main);
  font-weight: 700;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
}

.guide-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-muted);
}

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

/* FAQ Accordion HTML5 */
.seo-faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.seo-faq-item {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s;
}

.seo-faq-item[open] {
  border-color: var(--border-focus);
}

.seo-faq-question {
  padding: 1.15rem 1.25rem;
  font-family: 'Outfit', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

.seo-faq-question::-webkit-details-marker {
  display: none;
}

.seo-faq-question::after {
  content: '+';
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--text-muted);
  transition: transform 0.2s;
}

.seo-faq-item[open] .seo-faq-question::after {
  content: '−';
}

.seo-faq-answer {
  padding: 0 1.25rem 1.25rem;
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.seo-faq-answer p {
  margin-bottom: 0.5rem;
}

.seo-faq-answer p:last-child {
  margin-bottom: 0;
}