/* ==========================================================================
   styles.css - StreamEdu
   Diseño Moderno, Minimalista y Mobile-First con 6 Paletas de Colores
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. VARIABLES DE TEMA Y SISTEMA DE DISEÑO
   -------------------------------------------------------------------------- */
:root {
  /* Tipografía */
  --font-family: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Espaciados y Radios */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Transiciones */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Capas Z-Index */
  --z-header: 40;
  --z-drawer: 50;
  --z-backdrop: 60;
  --z-modal: 70;
  --z-toast: 80;

  --backdrop-filter: blur(12px);

  /* Paleta Base por Defecto: Lemon Ice-Cream Fallback */
  --bg-app: #faf7ee;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f4efdf;
  --bg-input: #fdfbf5;
  --bg-hover: #ede4ce;
  --border-subtle: #e4d8ba;
  --border-focus: #f5b700;

  --text-main: #112443;
  --text-muted: #3b4e6a;
  --text-dimmed: #687994;

  --primary: #c98900;
  --primary-hover: #ad7500;
  --primary-subtle: rgba(254, 224, 53, 0.25);
  --primary-glow: rgba(245, 183, 0, 0.35);

  --success: #5f8d12;
  --success-subtle: rgba(180, 218, 61, 0.22);
  --danger: #dc2626;
  --danger-subtle: rgba(220, 38, 38, 0.12);
  --warning: #d97706;

  --shadow-sm: 0 1px 3px rgba(17, 36, 67, 0.06);
  --shadow-md: 0 4px 14px rgba(17, 36, 67, 0.08);
  --shadow-lg: 0 12px 30px rgba(17, 36, 67, 0.12);
}

/* TEMA 1: Obsidian Dark */
[data-theme="obsidian"] {
  --bg-app: #090d16;
  --bg-surface: #101726;
  --bg-surface-elevated: #162035;
  --bg-input: #0c121e;
  --bg-hover: #1c2842;
  --border-subtle: #1e293b;
  --border-focus: #6366f1;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dimmed: #64748b;

  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-subtle: rgba(99, 102, 241, 0.14);
  --primary-glow: rgba(99, 102, 241, 0.35);

  --success: #10b981;
  --success-subtle: rgba(16, 185, 129, 0.15);
  --danger: #ef4444;
  --danger-subtle: rgba(239, 68, 68, 0.15);
  --warning: #f59e0b;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 30px rgba(0, 0, 0, 0.65);
}

/* TEMA 2: Cyber Emerald */
[data-theme="emerald"] {
  --bg-app: #04120e;
  --bg-surface: #09211a;
  --bg-surface-elevated: #0f3329;
  --bg-input: #061913;
  --bg-hover: #144337;
  --border-subtle: #174236;
  --border-focus: #10b981;

  --text-main: #ecfdf5;
  --text-muted: #86efac;
  --text-dimmed: #4ade80;

  --primary: #10b981;
  --primary-hover: #059669;
  --primary-subtle: rgba(16, 185, 129, 0.15);
  --primary-glow: rgba(16, 185, 129, 0.4);

  --success: #10b981;
  --success-subtle: rgba(16, 185, 129, 0.18);
  --danger: #f43f5e;
  --danger-subtle: rgba(244, 63, 94, 0.15);
  --warning: #fbbf24;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.55);
  --shadow-lg: 0 12px 30px rgba(0, 0, 0, 0.7);
}

/* TEMA 3: Nordic Frost */
[data-theme="frost"] {
  --bg-app: #07101e;
  --bg-surface: #0d1b33;
  --bg-surface-elevated: #14284d;
  --bg-input: #081324;
  --bg-hover: #1c3666;
  --border-subtle: #1a335a;
  --border-focus: #06b6d4;

  --text-main: #f0f9ff;
  --text-muted: #93c5fd;
  --text-dimmed: #60a5fa;

  --primary: #06b6d4;
  --primary-hover: #0891b2;
  --primary-subtle: rgba(6, 182, 212, 0.15);
  --primary-glow: rgba(6, 182, 212, 0.4);

  --success: #10b981;
  --success-subtle: rgba(16, 185, 129, 0.15);
  --danger: #ef4444;
  --danger-subtle: rgba(239, 68, 68, 0.15);
  --warning: #f59e0b;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.45);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.55);
  --shadow-lg: 0 12px 30px rgba(0, 0, 0, 0.7);
}

/* TEMA 4: Sunset Amber */
[data-theme="amber"] {
  --bg-app: #140d07;
  --bg-surface: #21160d;
  --bg-surface-elevated: #332214;
  --bg-input: #1a110a;
  --bg-hover: #442d1b;
  --border-subtle: #3f2a1b;
  --border-focus: #f59e0b;

  --text-main: #fffbeb;
  --text-muted: #fcd34d;
  --text-dimmed: #b45309;

  --primary: #f59e0b;
  --primary-hover: #d97706;
  --primary-subtle: rgba(245, 158, 11, 0.16);
  --primary-glow: rgba(245, 158, 11, 0.38);

  --success: #10b981;
  --success-subtle: rgba(16, 185, 129, 0.15);
  --danger: #ef4444;
  --danger-subtle: rgba(239, 68, 68, 0.15);
  --warning: #fbbf24;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.45);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 12px 30px rgba(0, 0, 0, 0.75);
}

/* TEMA 5: Clean Light */
[data-theme="light"] {
  --bg-app: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-input: #f8fafc;
  --bg-hover: #e2e8f0;
  --border-subtle: #e2e8f0;
  --border-focus: #2563eb;

  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dimmed: #94a3b8;

  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-subtle: rgba(37, 99, 235, 0.1);
  --primary-glow: rgba(37, 99, 235, 0.25);

  --success: #059669;
  --success-subtle: rgba(5, 150, 105, 0.12);
  --danger: #dc2626;
  --danger-subtle: rgba(220, 38, 38, 0.12);
  --warning: #d97706;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 30px rgba(0, 0, 0, 0.12);
}

/* TEMA 6: Rose Quartz */
[data-theme="rose"] {
  --bg-app: #150914;
  --bg-surface: #221021;
  --bg-surface-elevated: #321831;
  --bg-input: #1a0b19;
  --bg-hover: #442042;
  --border-subtle: #3f1e3d;
  --border-focus: #f43f5e;

  --text-main: #fff1f2;
  --text-muted: #fda4af;
  --text-dimmed: #be123c;

  --primary: #f43f5e;
  --primary-hover: #e11d48;
  --primary-subtle: rgba(244, 63, 94, 0.15);
  --primary-glow: rgba(244, 63, 94, 0.4);

  --success: #10b981;
  --success-subtle: rgba(16, 185, 129, 0.15);
  --danger: #f43f5e;
  --danger-subtle: rgba(244, 63, 94, 0.18);
  --warning: #f59e0b;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.45);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 12px 30px rgba(0, 0, 0, 0.75);
}

/* TEMA 7: Lemon Ice-Cream (Predeterminado - Tema Claro Cremoso y Refrescante) */
[data-theme="lemon"] {
  --bg-app: #faf7ee;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f4efdf;
  --bg-input: #fdfbf5;
  --bg-hover: #ede4ce;
  --border-subtle: #e4d8ba;
  --border-focus: #f5b700;

  --text-main: #112443;
  --text-muted: #3b4e6a;
  --text-dimmed: #687994;

  --primary: #c98900;
  --primary-hover: #ad7500;
  --primary-subtle: rgba(254, 224, 53, 0.25);
  --primary-glow: rgba(245, 183, 0, 0.35);

  --success: #5f8d12;
  --success-subtle: rgba(180, 218, 61, 0.22);
  --danger: #dc2626;
  --danger-subtle: rgba(220, 38, 38, 0.12);
  --warning: #d97706;

  --shadow-sm: 0 1px 3px rgba(17, 36, 67, 0.06);
  --shadow-md: 0 4px 14px rgba(17, 36, 67, 0.08);
  --shadow-lg: 0 12px 30px rgba(17, 36, 67, 0.12);
}

/* TEMA 8: Iron-Man (Tema Oscuro Tecnológico y Cinematográfico) */
[data-theme="ironman"] {
  --bg-app: #120809;
  --bg-surface: #1c0d10;
  --bg-surface-elevated: #281216;
  --bg-input: #15090b;
  --bg-hover: #3a181e;
  --border-subtle: #451b22;
  --border-focus: #5ad1f6;

  --text-main: #fff5f5;
  --text-muted: #e6a8a8;
  --text-dimmed: #a86b6b;

  --primary: #d32f2f;
  --primary-hover: #b71c1c;
  --primary-subtle: rgba(211, 47, 47, 0.2);
  --primary-glow: rgba(229, 57, 53, 0.45);

  --success: #10b981;
  --success-subtle: rgba(16, 185, 129, 0.16);
  --danger: #ef4444;
  --danger-subtle: rgba(239, 68, 68, 0.18);
  --warning: #e9bf1f;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.6);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.7);
  --shadow-lg: 0 12px 30px rgba(0, 0, 0, 0.85);
}

/* --------------------------------------------------------------------------
   2. REINICIO GENERAL Y BASE
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-family);
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-main);
  background-color: var(--bg-app);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-app);
  color: var(--text-main);
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Scrollbar Personalizado */
::-webkit-scrollbar {
  width: 7px;
  height: 7px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border-subtle);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-dimmed);
}

/* Elementos ocultos utilitarios */
.hidden {
  display: none !important;
}

/* --------------------------------------------------------------------------
   3. BOTONES Y COMPONENTES ATÓMICOS
   -------------------------------------------------------------------------- */
button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  border: none;
  background: none;
  outline: none;
}

button {
  cursor: pointer;
  user-select: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
  color: inherit;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 8px var(--primary-glow);
}
.btn-primary:hover:not(:disabled) {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px var(--primary-glow);
}

[data-theme="lemon"] .btn-primary {
  background: #fee035;
  color: #112443;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(245, 183, 0, 0.35);
}
[data-theme="lemon"] .btn-primary:hover:not(:disabled) {
  background: #edd025;
  color: #112443;
  box-shadow: 0 4px 14px rgba(245, 183, 0, 0.5);
}

[data-theme="ironman"] .btn-primary {
  background: #d32f2f;
  color: #ffffff;
  box-shadow: 0 2px 10px rgba(211, 47, 47, 0.45);
}
[data-theme="ironman"] .btn-primary:hover:not(:disabled) {
  background: #b71c1c;
  box-shadow: 0 4px 16px rgba(211, 47, 47, 0.6);
}

.btn-secondary {
  background: var(--bg-surface-elevated);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--bg-hover);
  border-color: var(--border-focus);
}

.btn-danger {
  background: var(--danger);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.25);
}
.btn-danger:hover:not(:disabled) {
  background: #dc2626;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.4);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}
.btn-ghost:hover:not(:disabled) {
  background: var(--bg-hover);
  color: var(--text-main);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.82rem;
  border-radius: var(--radius-sm);
}

.btn-xs {
  padding: 4px 8px;
  font-size: 0.75rem;
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.btn-icon:hover:not(:disabled) {
  background: var(--bg-hover);
  color: var(--primary);
}

a.btn-icon {
  color: var(--text-muted);
  text-decoration: none;
}

a.btn-icon:hover {
  background: var(--bg-hover);
  color: var(--primary);
}

.btn-block {
  width: 100%;
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1px 6px;
  font-size: 0.72rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  background: var(--primary);
  color: #ffffff;
  min-width: 18px;
  height: 18px;
}

/* --------------------------------------------------------------------------
   4. CABECERA (HEADER) Y WIDGET DE PROGRESO
   -------------------------------------------------------------------------- */
.app-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: var(--backdrop-filter);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  max-width: 1600px;
  margin: 0 auto;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.brand-logo-img {
  height: 38px;
  width: auto;
  max-width: 140px;
  object-fit: contain;
  filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.4));
  transition: transform var(--transition-fast), filter var(--transition-fast);
}

.brand:hover .brand-logo-img {
  transform: scale(1.04);
  filter: drop-shadow(0 2px 10px var(--primary-glow));
}

[data-theme="light"] .brand-logo-img,
[data-theme="clean"] .brand-logo-img {
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.08));
}

[data-theme="light"] .brand:hover .brand-logo-img,
[data-theme="clean"] .brand:hover .brand-logo-img {
  filter: drop-shadow(0 2px 8px rgba(37, 99, 235, 0.25));
}

[data-theme="lemon"] .brand-logo-img {
  filter: drop-shadow(0 1px 2px rgba(17, 36, 67, 0.12));
}

[data-theme="lemon"] .brand:hover .brand-logo-img {
  filter: drop-shadow(0 2px 10px rgba(245, 183, 0, 0.45));
}

[data-theme="ironman"] .brand-logo-img {
  filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.6));
}

[data-theme="ironman"] .brand:hover .brand-logo-img {
  filter: drop-shadow(0 2px 12px rgba(229, 57, 53, 0.65));
}

/* Adaptación dinámica del logotipo según el tema activo */
.brand-logo-img,
.empty-logo-img,
.welcome-logo-img {
  content: url('assets/logo-light.png');
}

[data-theme="obsidian"] .brand-logo-img,
[data-theme="obsidian"] .empty-logo-img,
[data-theme="obsidian"] .welcome-logo-img,
[data-theme="emerald"] .brand-logo-img,
[data-theme="emerald"] .empty-logo-img,
[data-theme="emerald"] .welcome-logo-img,
[data-theme="frost"] .brand-logo-img,
[data-theme="frost"] .empty-logo-img,
[data-theme="frost"] .welcome-logo-img,
[data-theme="amber"] .brand-logo-img,
[data-theme="amber"] .empty-logo-img,
[data-theme="amber"] .welcome-logo-img,
[data-theme="rose"] .brand-logo-img,
[data-theme="rose"] .empty-logo-img,
[data-theme="rose"] .welcome-logo-img,
[data-theme="ironman"] .brand-logo-img,
[data-theme="ironman"] .empty-logo-img,
[data-theme="ironman"] .welcome-logo-img {
  content: url('assets/logo-dark.png');
}

[data-theme="light"] .brand-logo-img,
[data-theme="light"] .empty-logo-img,
[data-theme="light"] .welcome-logo-img,
[data-theme="clean"] .brand-logo-img,
[data-theme="clean"] .empty-logo-img,
[data-theme="clean"] .welcome-logo-img,
[data-theme="lemon"] .brand-logo-img,
[data-theme="lemon"] .empty-logo-img,
[data-theme="lemon"] .welcome-logo-img {
  content: url('assets/logo-light.png');
}

/* Utilidad accesible para ocultar visualmente manteniendo compatibilidad de lectores de pantalla */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.brand-text {
  display: flex;
  align-items: center;
  gap: 6px;
}

.brand-title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.025em;
  color: var(--text-main);
  line-height: 1;
  user-select: none;
  white-space: nowrap;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

.brand:hover .brand-title {
  opacity: 0.92;
}

/* Barra de Progreso Global */
.course-progress-widget {
  flex: 1;
  max-width: 380px;
  margin: 0 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.progress-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
}

.progress-label {
  color: var(--text-muted);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.progress-percent {
  font-weight: 700;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}

.progress-track {
  width: 100%;
  height: 6px;
  background: var(--bg-hover);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary-hover));
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
  box-shadow: 0 0 10px var(--primary-glow);
}

/* Acciones de Cabecera */
.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.theme-current-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--primary);
  margin-right: -2px;
  border: 1.5px solid var(--bg-surface);
}

.mobile-menu-toggle {
  display: none;
}

/* Banner de Aviso de Protocolo Local (Error 153) */
.protocol-warning-banner {
  background: var(--bg-surface-elevated);
  border-bottom: 1px solid var(--warning);
  padding: 10px 16px;
  animation: fadeIn 250ms ease forwards;
}

.protocol-warning-content {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.84rem;
  color: var(--text-main);
  flex-wrap: wrap;
}

.protocol-warning-content svg {
  color: var(--warning);
  flex-shrink: 0;
}

.protocol-warning-text {
  flex: 1;
  min-width: 260px;
}

.protocol-warning-text code {
  background: var(--bg-input);
  padding: 2px 5px;
  border-radius: var(--radius-xs);
  color: var(--warning);
  font-family: var(--font-mono);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --------------------------------------------------------------------------
   5. LAYOUT PRINCIPAL (RESPONSIVO)
   -------------------------------------------------------------------------- */
.app-layout {
  display: flex;
  flex-direction: column;
  flex: 1;
  max-width: 1600px;
  margin: 0 auto;
  width: 100%;
  padding: 16px;
  gap: 20px;
}

/* --------------------------------------------------------------------------
   6. COLUMNA DEL REPRODUCTOR (IZQUIERDA / PRINCIPAL)
   -------------------------------------------------------------------------- */
.player-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
  flex: 1;
  min-width: 0;
}

/* Contenedor del Video 16:9 */
.video-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: #000000;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-subtle);
}

.video-iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* Estado Vacío del Reproductor */
.empty-player-state {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
  background: radial-gradient(circle at center, var(--bg-surface-elevated) 0%, var(--bg-surface) 100%);
}

.empty-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  background: transparent;
  border: none;
  box-shadow: none;
}

.empty-logo-img {
  width: auto;
  height: 56px;
  max-width: 180px;
  object-fit: contain;
  filter: drop-shadow(0 2px 10px var(--primary-glow));
  transition: transform var(--transition-base), filter var(--transition-base);
}

[data-theme="light"] .empty-logo-img,
[data-theme="clean"] .empty-logo-img,
[data-theme="lemon"] .empty-logo-img {
  filter: drop-shadow(0 2px 6px rgba(17, 36, 67, 0.12));
}

[data-theme="ironman"] .empty-logo-img {
  filter: drop-shadow(0 2px 12px rgba(229, 57, 53, 0.5));
}

.empty-player-state h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.empty-player-state p {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 380px;
  margin-bottom: 20px;
}

.empty-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

/* Barra de Controles Rápidos */
.player-controls-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.controls-left, .controls-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Botón Check de Visto */
.btn-check {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface-elevated);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
  font-weight: 600;
  font-size: 0.88rem;
  transition: all var(--transition-fast);
}

.btn-check:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--text-main);
}

.check-box-icon {
  width: 22px;
  height: 22px;
  border-radius: var(--radius-xs);
  border: 1.5px solid var(--text-dimmed);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  color: transparent;
}

.btn-check.completed {
  background: var(--success-subtle);
  color: var(--success);
  border-color: var(--success);
}

.btn-check.completed .check-box-icon {
  background: var(--success);
  border-color: var(--success);
  color: #ffffff;
}

/* Tarjeta de Metadatos del Video */
.video-meta-card {
  padding: 20px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.meta-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.module-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  background: var(--bg-surface-elevated);
  color: var(--primary);
  border: 1px solid var(--border-subtle);
}

.status-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  background: var(--bg-hover);
  color: var(--text-dimmed);
}

.status-badge.completed {
  background: var(--success-subtle);
  color: var(--success);
}

.segment-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  background: var(--primary-subtle);
  color: var(--primary);
  border: 1px solid var(--border-subtle);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
}

.segment-badge svg {
  color: var(--primary);
}

.video-title {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-main);
}

.video-description-box {
  margin-top: 4px;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
}

.video-description-text {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  white-space: pre-line;
}

/* --------------------------------------------------------------------------
   7. COLUMNA LATERAL: PLAYLIST / LISTA DE VIDEOS (SIDEBAR)
   -------------------------------------------------------------------------- */
.playlist-sidebar {
  display: flex;
  flex-direction: column;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.sidebar-header {
  padding: 16px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--bg-surface);
}

.sidebar-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sidebar-title-wrap {
  display: flex;
  flex-direction: column;
}

.sidebar-title-heading-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sidebar-title {
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.sidebar-title:hover {
  color: var(--primary);
}

.sidebar-edit-title-btn {
  opacity: 0.65;
  color: var(--text-muted);
  padding: 3px;
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.sidebar-title-heading-wrap:hover .sidebar-edit-title-btn,
.sidebar-edit-title-btn:hover {
  opacity: 1;
  color: var(--primary);
  background: var(--primary-subtle);
}

.sidebar-close-course-btn {
  opacity: 0.65;
  color: var(--text-muted);
  padding: 3px;
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.sidebar-title-heading-wrap:hover .sidebar-close-course-btn,
.sidebar-close-course-btn:hover {
  opacity: 1;
  color: var(--danger);
  background: var(--danger-subtle);
}

.sidebar-video-count {
  font-size: 0.75rem;
  color: var(--text-dimmed);
}

.sidebar-close-btn {
  display: none;
}

/* Buscador */
.search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 10px;
  color: var(--text-dimmed);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 8px 32px 8px 34px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 0.85rem;
  transition: border-color var(--transition-fast);
}

.search-input:focus {
  border-color: var(--border-focus);
}

.search-clear-btn {
  position: absolute;
  right: 8px;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dimmed);
  cursor: pointer;
}

.search-clear-btn:hover {
  color: var(--text-main);
}

/* Filtros por pestaña */
.filter-tabs {
  display: flex;
  background: var(--bg-input);
  padding: 3px;
  border-radius: var(--radius-sm);
  gap: 2px;
}

.filter-tab {
  flex: 1;
  padding: 6px 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-align: center;
  border-radius: var(--radius-xs);
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.filter-tab.active {
  background: var(--bg-surface-elevated);
  color: var(--text-main);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

/* Contenedor de Acordeón con Scroll */
.playlist-accordion-container {
  flex: 1;
  overflow-y: auto;
  max-height: 600px;
  display: flex;
  flex-direction: column;
}

/* Módulo / Sección del Acordeón */
.playlist-module {
  border-bottom: 1px solid var(--border-subtle);
}

.module-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: var(--bg-surface-elevated);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition-fast);
}

.module-header:hover {
  background: var(--bg-hover);
}

.module-header-main {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 0.85rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  padding: 4px 0;
  min-width: 0;
}

.module-title-text {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}

.module-video-badge {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-input);
  padding: 1px 6px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.module-arrow {
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform var(--transition-fast);
}

.playlist-module.collapsed .module-arrow {
  transform: rotate(-90deg);
}

.module-actions {
  display: flex;
  align-items: center;
  gap: 3px;
  margin-left: 6px;
  flex-shrink: 0;
}

.module-action-btn {
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-xs);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.module-action-btn:hover {
  background: var(--bg-surface);
  border-color: var(--border-subtle);
  color: var(--primary);
}

.module-action-btn.module-delete-btn:hover {
  color: var(--danger);
  border-color: rgba(239, 68, 68, 0.35);
  background: rgba(239, 68, 68, 0.1);
}

.playlist-module.collapsed .module-video-list {
  display: none;
}

.module-video-list {
  display: flex;
  flex-direction: column;
}

/* Item de Video en la Lista */
.video-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  transition: all var(--transition-fast);
  cursor: pointer;
  position: relative;
}

.video-item:last-child {
  border-bottom: none;
}

.video-item:hover {
  background: var(--bg-hover);
}

.video-item.active {
  background: var(--primary-subtle);
  border-left: 3px solid var(--primary);
}

/* Tirador / Grip para Drag & Drop */
.video-item-grip {
  color: var(--text-dimmed);
  opacity: 0.3;
  cursor: grab;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: opacity var(--transition-fast), color var(--transition-fast);
  padding: 2px 0;
}

.video-item:hover .video-item-grip {
  opacity: 0.85;
  color: var(--text-muted);
}

.video-item-grip:hover {
  color: var(--primary);
}

/* Estados de Drag and Drop */
.video-item.dragging {
  opacity: 0.4;
  background: var(--bg-surface-elevated) !important;
  border: 1.5px dashed var(--primary) !important;
}

.video-item.drag-over-top {
  border-top: 2.5px solid var(--primary) !important;
  box-shadow: inset 0 2px 6px var(--primary-glow);
}

.video-item.drag-over-bottom {
  border-bottom: 2.5px solid var(--primary) !important;
  box-shadow: inset 0 -2px 6px var(--primary-glow);
}

.playlist-module.drag-over-empty-module {
  border: 2px dashed var(--primary) !important;
  background: var(--primary-subtle) !important;
}

/* Checkbox circular del item */
.video-item-check {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 1.5px solid var(--text-dimmed);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition-fast);
  color: transparent;
  cursor: pointer;
}

.video-item-check:hover {
  border-color: var(--primary);
}

.video-item.completed .video-item-check {
  background: var(--success);
  border-color: var(--success);
  color: #ffffff;
}

/* Miniatura del item */
.video-item-thumb-wrap {
  width: 58px;
  height: 38px;
  border-radius: var(--radius-xs);
  overflow: hidden;
  background: #000;
  flex-shrink: 0;
  position: relative;
}

.video-item-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-item-info {
  flex: 1;
  min-width: 0;
}

.video-item-title {
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 2px;
}

.video-item.completed .video-item-title {
  color: var(--text-muted);
}

.video-item-meta {
  font-size: 0.72rem;
  color: var(--text-dimmed);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.video-item-time-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 1px 5px;
  border-radius: var(--radius-xs);
  background: var(--primary-subtle);
  color: var(--primary);
  font-size: 0.68rem;
  font-weight: 600;
  font-family: var(--font-mono);
}

/* Botones de acciones en video individual (Editar / Eliminar) */
.video-item-actions {
  display: flex;
  align-items: center;
  gap: 2px;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.video-item:hover .video-item-actions,
.video-item:focus-within .video-item-actions {
  opacity: 1;
}

@media (max-width: 768px) {
  .video-item-actions {
    opacity: 0.85;
  }
}

.video-item-action-btn {
  background: transparent;
  border: none;
  color: var(--text-dimmed);
  padding: 4px;
  border-radius: var(--radius-xs);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.video-item-action-btn.edit:hover {
  color: var(--primary);
  background: var(--primary-subtle);
}

.video-item-action-btn.delete:hover {
  color: var(--danger);
  background: var(--danger-subtle);
}

/* Compatibilidad retrospectiva con .video-item-delete */
.video-item-delete {
  opacity: 0;
  transition: opacity var(--transition-fast);
  color: var(--text-dimmed);
  padding: 4px;
}

.video-item:hover .video-item-delete {
  opacity: 1;
}

.video-item-delete:hover {
  color: var(--danger);
}

/* Pie de Barra Lateral */
.sidebar-footer {
  padding: 12px;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-surface);
}

/* Estado de lista vacía en buscador */
.empty-list-notice {
  padding: 28px 16px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* --------------------------------------------------------------------------
   8. VENTANAS MODALES
   -------------------------------------------------------------------------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.modal-card {
  width: 100%;
  max-width: 540px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transform: translateY(12px) scale(0.97);
  transition: transform var(--transition-normal);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
}

.modal-backdrop.open .modal-card {
  transform: translateY(0) scale(1);
}

.modal-card.modal-lg {
  max-width: 680px;
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--primary);
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
}

.modal-close-btn {
  color: var(--text-muted);
  border-radius: var(--radius-full);
}

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

.modal-body {
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-subtitle {
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
}

/* Formularios en Modales */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 9px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 0.88rem;
  transition: border-color var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--border-focus);
}

.form-hint {
  font-size: 0.72rem;
  color: var(--text-dimmed);
}

.time-range-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.time-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.form-sublabel {
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--text-dimmed);
}

.input-with-button {
  display: flex;
  gap: 8px;
}

.input-with-button .form-input {
  flex: 1;
}

/* Zona de Arrastrar y Soltar (Dropzone) */
.upload-dropzone {
  border: 2px dashed var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px 16px;
  text-align: center;
  background: var(--bg-input);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.upload-dropzone:hover, .upload-dropzone.dragover {
  border-color: var(--primary);
  background: var(--primary-subtle);
}

.file-input-hidden {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.dropzone-content {
  pointer-events: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.dropzone-icon {
  color: var(--primary);
  margin-bottom: 4px;
}

.dropzone-title {
  font-weight: 600;
  font-size: 0.92rem;
}

.dropzone-subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.modal-divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 4px 0;
  color: var(--text-dimmed);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.modal-divider::before, .modal-divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--border-subtle);
}

.modal-divider span {
  padding: 0 10px;
}

/* Tarjeta Demo Rápida */
.demo-prompt-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  gap: 12px;
}

.demo-prompt-info {
  display: flex;
  flex-direction: column;
  font-size: 0.8rem;
}

.demo-prompt-info strong {
  color: var(--text-main);
}

.demo-prompt-info span {
  color: var(--text-muted);
}

/* Guía Formato JSON */
.json-format-guide {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.json-format-guide summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 6px;
}

.json-format-guide pre {
  background: var(--bg-input);
  padding: 10px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  border: 1px solid var(--border-subtle);
}

/* Vista previa de video manual */
.video-preview-box {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  background: var(--bg-input);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.preview-thumbnail {
  width: 72px;
  height: 48px;
  border-radius: var(--radius-xs);
  object-fit: cover;
}

.preview-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.preview-badge {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--success);
  text-transform: uppercase;
}

.preview-id {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

/* Alertas en Modales */
.modal-feedback-alert {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  line-height: 1.4;
}

.modal-feedback-alert.error {
  background: var(--danger-subtle);
  color: var(--danger);
  border: 1px solid var(--danger);
}

.modal-feedback-alert.success {
  background: var(--success-subtle);
  color: var(--success);
  border: 1px solid var(--success);
}

/* --------------------------------------------------------------------------
   9. MODAL DE ARCHIVOS ADICIONALES (MÁX 10 MB)
   -------------------------------------------------------------------------- */
.attachment-tabs {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 8px;
}

.attachment-tab-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.attachment-tab-btn.active {
  background: var(--primary-subtle);
  color: var(--primary);
}

.attachment-dropzone {
  padding: 20px 16px;
}

.form-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.attachments-list-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 6px;
}

.section-subtitle {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main);
}

.attachments-table-container {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 220px;
  overflow-y: auto;
}

.attachment-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  gap: 10px;
}

.attachment-row-left {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.attachment-type-icon {
  color: var(--primary);
  flex-shrink: 0;
}

.attachment-name-meta {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.attachment-name {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.attachment-meta-info {
  font-size: 0.72rem;
  color: var(--text-dimmed);
}

.attachment-row-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   10. MODAL SELECTOR DE TEMAS (6 PALETAS)
   -------------------------------------------------------------------------- */
.themes-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

@media (min-width: 480px) {
  .themes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.theme-option-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--bg-input);
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-md);
  text-align: left;
  transition: all var(--transition-fast);
}

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

.theme-option-btn.active {
  border-color: var(--primary);
  background: var(--primary-subtle);
}

.theme-swatch {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.theme-swatch-accent {
  width: 14px;
  height: 14px;
  border-radius: 50%;
}

.theme-info {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.theme-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main);
}

.theme-desc {
  font-size: 0.72rem;
  color: var(--text-dimmed);
}

.theme-check-icon {
  opacity: 0;
  color: var(--primary);
}

.theme-option-btn.active .theme-check-icon {
  opacity: 1;
}

/* --------------------------------------------------------------------------
   11. SISTEMA DE TOAST NOTIFICATIONS
   -------------------------------------------------------------------------- */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 360px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  padding: 12px 16px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  box-shadow: var(--shadow-lg);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: toastSlideIn 250ms ease forwards;
}

.toast.toast-success {
  border-left-color: var(--success);
}

.toast.toast-error {
  border-left-color: var(--danger);
}

@keyframes toastSlideIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --------------------------------------------------------------------------
   12. MEDIA QUERIES (MOBILE-FIRST A ESCRITORIO)
   -------------------------------------------------------------------------- */

/* Dispositivos Móviles (Hasta 1023px) */
@media (max-width: 1023px) {
  .course-progress-widget {
    display: none; /* Se oculta o se comprime en móvil para dar espacio */
  }

  .btn-text {
    display: none; /* En pantallas pequeñas se muestran solo los iconos */
  }

  .mobile-menu-toggle {
    display: inline-flex;
  }

  .sidebar-close-btn {
    display: inline-flex;
  }

  /* Barra lateral off-canvas en pantallas móviles */
  .playlist-sidebar {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 85%;
    max-width: 380px;
    z-index: var(--z-drawer);
    border-radius: 0;
    border-left: 1px solid var(--border-subtle);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    box-shadow: var(--shadow-lg);
  }

  .playlist-sidebar.open {
    transform: translateX(0);
  }

  .sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    z-index: calc(var(--z-drawer) - 1);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
  }

  .sidebar-backdrop.open {
    opacity: 1;
    visibility: visible;
  }

  .playlist-accordion-container {
    max-height: calc(100vh - 200px);
  }
}

/* Pantallas de Escritorio (1024px o más) */
@media (min-width: 1024px) {
  .app-layout {
    flex-direction: row;
    align-items: flex-start;
  }

  .player-column {
    flex: 1;
  }

  .playlist-sidebar {
    width: 380px;
    position: sticky;
    top: 76px;
    height: calc(100vh - 100px);
  }

  .playlist-accordion-container {
    max-height: calc(100vh - 260px);
  }

  .btn-text {
    display: inline;
  }
}

@media (min-width: 1280px) {
  .playlist-sidebar {
    width: 420px;
  }
}

/* --------------------------------------------------------------------------
   13. LIBRETA DE APUNTES (NOTES DRAWER)
   -------------------------------------------------------------------------- */

/* Pestaña flotante lateral fija "Libreta" */
.notes-tab-trigger {
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: var(--z-drawer);
  background: var(--bg-surface-elevated);
  color: var(--primary);
  border: 1px solid var(--border-subtle);
  border-right: none;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 14px 8px;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.notes-tab-trigger:hover {
  background: var(--bg-hover);
  color: var(--primary-hover);
  transform: translateY(-50%) translateX(-4px);
  box-shadow: var(--shadow-lg);
}

.notes-tab-trigger.active {
  background: var(--primary);
  color: #ffffff;
}

.notes-tab-label {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  transform: rotate(180deg);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Overlay de fondo: transparente y sin desenfoque para mantener el video 100% nítido */
.notes-backdrop {
  position: fixed;
  inset: 0;
  background: transparent;
  backdrop-filter: none;
  z-index: calc(var(--z-modal) - 1);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.notes-backdrop.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* En pantallas medianas y grandes, no bloquear los clics en el video para poder pausar/reproducir mientras se escribe */
@media (min-width: 1024px) {
  .notes-backdrop.open {
    pointer-events: none;
  }
}


/* Panel Drawer (Réplica Exacta de LICBook) */
.reader-notes-drawer,
.notes-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 480px;
  max-width: 95vw;
  background-color: var(--bg-surface);
  border-left: 1px solid var(--border-subtle);
  box-shadow: -12px 0 40px rgba(0, 0, 0, 0.65);
  z-index: var(--z-modal);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

.reader-notes-drawer.open,
.notes-drawer.open {
  transform: translateX(0);
}

/* Cabecera del Drawer */
.notes-drawer-header {
  padding: 14px 18px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-shrink: 0;
}

.notes-header-info {
  display: flex;
  flex-direction: column;
  gap: 3px;
  overflow: hidden;
}

.notes-header-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.notes-header-book-icon {
  color: var(--primary);
  flex-shrink: 0;
}

.notes-book-title {
  font-size: 0.76rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.notes-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.notes-save-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 600;
  background-color: var(--bg-surface-elevated);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
}

.save-status-dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: var(--primary);
  display: inline-block;
  box-shadow: 0 0 6px var(--primary-glow);
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}

.save-status-dot.saving {
  background-color: var(--warning);
  box-shadow: 0 0 6px var(--warning);
  animation: pulseDot 1s infinite alternate;
}

@keyframes pulseDot {
  0% { opacity: 0.4; transform: scale(0.8); }
  100% { opacity: 1; transform: scale(1.2); }
}

.notes-close-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.notes-close-btn:hover {
  background: var(--bg-hover);
  border-color: var(--primary);
  color: var(--text-main);
}

/* Barra de Acciones: Descargar & Anexar */
.notes-actions-bar {
  display: flex;
  gap: 8px;
  padding: 10px 16px;
  background-color: var(--bg-surface-elevated);
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.btn-notes-action {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 600;
  background-color: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-notes-action:hover {
  background-color: var(--bg-hover);
  color: var(--primary);
  border-color: var(--primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-notes-action svg {
  color: var(--primary);
  flex-shrink: 0;
}

/* Barra de Herramientas Markdown Estilo Obsidian */
.notes-markdown-toolbar {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 6px 14px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  overflow-x: auto;
  flex-shrink: 0;
  scrollbar-width: none;
}

.notes-markdown-toolbar::-webkit-scrollbar {
  display: none;
}

/* Selector de Pestañas (Editar / Previa) */
.notes-view-tabs {
  display: inline-flex;
  align-items: center;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 2px;
  flex-shrink: 0;
}

.btn-notes-tab {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all var(--transition-fast);
}

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

.btn-notes-tab.active {
  background-color: var(--primary);
  color: #ffffff;
  font-weight: 700;
  box-shadow: 0 2px 8px var(--primary-glow);
}

.toolbar-divider {
  width: 1px;
  height: 18px;
  background-color: var(--border-subtle);
  margin: 0 3px;
  flex-shrink: 0;
}

.toolbar-divider-sm {
  width: 1px;
  height: 14px;
  background-color: var(--border-subtle);
  margin: 0 2px;
  flex-shrink: 0;
}

/* Grupo de Herramientas de Formato */
.notes-tools-group {
  display: flex;
  align-items: center;
  gap: 3px;
  flex-shrink: 0;
  transition: opacity var(--transition-fast);
}

.notes-tools-group.disabled {
  opacity: 0.3;
  pointer-events: none;
}

.tools-subgroup {
  display: flex;
  align-items: center;
  gap: 2px;
}

.btn-tool {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  border-radius: 4px;
  min-width: 25px;
  height: 25px;
  padding: 0 5px;
  font-size: 0.73rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.btn-tool:hover {
  background-color: var(--bg-hover);
  color: var(--primary);
  border-color: var(--primary);
  transform: translateY(-1px);
}

.btn-tool:active {
  transform: translateY(0);
}

.tool-highlight-badge {
  background-color: rgba(250, 204, 21, 0.25);
  color: #FACC15;
  padding: 0 2px;
  border-radius: 2px;
  font-size: 0.68rem;
  font-weight: 800;
  font-family: monospace;
}

/* ==========================================================================
   Cuerpo del Editor y Vista Previa Obsidian
   ========================================================================== */
.notes-editor-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 0;
  background-color: var(--bg-app);
  overflow: hidden;
  position: relative;
  margin: 10px 14px;
  border: 2px solid var(--primary);
  border-radius: var(--radius-md);
  box-shadow: 0 0 14px var(--primary-glow);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.notes-editor-body:focus-within {
  border-color: var(--primary-hover, var(--primary));
  box-shadow: 0 0 18px var(--primary-glow);
}

.reader-notes-textarea {
  width: 100%;
  height: 100%;
  padding: 14px 16px;
  box-sizing: border-box;
  resize: none;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-family: var(--font-family);
  font-size: 0.88rem;
  line-height: 1.65;
}

.reader-notes-textarea::placeholder {
  color: var(--text-dimmed);
  font-style: italic;
  font-size: 0.82rem;
  opacity: 0.75;
}

/* Scrollbar Personalizado Elegante para Textarea y Previa */
.reader-notes-textarea::-webkit-scrollbar,
.reader-notes-preview::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

.reader-notes-textarea::-webkit-scrollbar-track,
.reader-notes-preview::-webkit-scrollbar-track {
  background: transparent;
}

.reader-notes-textarea::-webkit-scrollbar-thumb,
.reader-notes-preview::-webkit-scrollbar-thumb {
  background-color: var(--border-subtle);
  border-radius: var(--radius-full);
}

.reader-notes-textarea::-webkit-scrollbar-thumb:hover,
.reader-notes-preview::-webkit-scrollbar-thumb:hover {
  background-color: var(--primary);
}

.reader-notes-textarea::-webkit-scrollbar-button,
.reader-notes-preview::-webkit-scrollbar-button {
  display: none;
  width: 0;
  height: 0;
}

/* Vista Previa Renderizada Obsidian */
.reader-notes-preview {
  width: 100%;
  height: 100%;
  padding: 14px 16px 30px;
  box-sizing: border-box;
  overflow-y: auto;
  overflow-x: hidden;
  color: var(--text-main);
  font-family: var(--font-family);
  font-size: 0.88rem;
  line-height: 1.65;
  word-break: break-word;
}

/* Tipografía y Elementos de Markdown Obsidian */
.obsidian-h1 {
  font-size: 1.32rem;
  font-weight: 700;
  color: var(--primary);
  margin: 14px 0 8px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border-subtle);
  line-height: 1.3;
}
.obsidian-h1:first-child {
  margin-top: 2px;
}

.obsidian-h2 {
  font-size: 1.15rem;
  font-weight: 650;
  color: #38BDF8;
  margin: 12px 0 6px;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--border-subtle);
  line-height: 1.35;
}

.obsidian-h3 {
  font-size: 1.02rem;
  font-weight: 600;
  color: #FBBF24;
  margin: 10px 0 5px;
  line-height: 1.4;
}

.obsidian-h4, .obsidian-h5, .obsidian-h6 {
  font-size: 0.92rem;
  font-weight: 600;
  color: #C084FC;
  margin: 8px 0 4px;
}

.reader-notes-preview strong {
  color: var(--text-main);
  font-weight: 700;
}

.reader-notes-preview em {
  color: var(--text-main);
  font-style: italic;
}

.reader-notes-preview del {
  color: var(--text-muted);
  text-decoration: line-through;
}

/* Resaltado Amarillo Obsidian Trademark ==texto== */
.obsidian-highlight {
  background-color: rgba(250, 204, 21, 0.25);
  color: #ca8a04;
  padding: 1px 5px;
  border-radius: 3px;
  border: 1px solid rgba(250, 204, 21, 0.4);
  font-weight: 600;
}

[data-theme="obsidian"] .obsidian-highlight,
[data-theme="emerald"] .obsidian-highlight,
[data-theme="frost"] .obsidian-highlight,
[data-theme="amber"] .obsidian-highlight,
[data-theme="rose"] .obsidian-highlight {
  color: #FDE047;
}

.obsidian-inline-code {
  background-color: var(--bg-surface-elevated);
  color: #FB7185;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
  border: 1px solid var(--border-subtle);
}

.obsidian-code-block {
  background-color: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 10px 12px;
  margin: 10px 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-main);
  line-height: 1.48;
}

.obsidian-quote {
  margin: 10px 0;
  padding: 8px 14px;
  border-left: 3px solid var(--primary);
  background-color: var(--primary-subtle);
  border-radius: 0 6px 6px 0;
  font-style: italic;
  color: var(--text-main);
}

.obsidian-ul {
  margin: 8px 0 8px 18px;
  list-style-type: disc;
}

.obsidian-ol {
  margin: 8px 0 8px 18px;
  list-style-type: decimal;
}

.reader-notes-preview li {
  margin: 3px 0;
  line-height: 1.55;
}

/* Listas de Tareas Interactivas Obsidian */
.obsidian-task-list {
  list-style: none;
  margin: 8px 0;
  padding-left: 2px;
}

.obsidian-task-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin: 4px 0;
  cursor: pointer;
  user-select: none;
}

.obsidian-task-checkbox {
  width: 15px;
  height: 15px;
  margin-top: 3px;
  accent-color: var(--primary);
  cursor: pointer;
  flex-shrink: 0;
}

.obsidian-task-item.completed span {
  text-decoration: line-through;
  opacity: 0.55;
}

.obsidian-wikilink {
  color: #A78BFA;
  background-color: rgba(167, 139, 250, 0.12);
  padding: 1px 5px;
  border-radius: 4px;
  text-decoration: underline;
  text-decoration-style: dotted;
  font-size: 0.9em;
  font-weight: 500;
}

.obsidian-link {
  color: #38BDF8;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.obsidian-hr {
  border: none;
  height: 1px;
  background-color: var(--border-subtle);
  margin: 14px 0;
}

.obsidian-spacing {
  height: 8px;
}

.obsidian-p {
  margin: 4px 0;
  line-height: 1.6;
}

.obsidian-empty-preview {
  text-align: center;
  padding: 40px 15px;
  color: var(--text-muted);
  font-style: italic;
  line-height: 1.6;
}

/* Pie del Drawer con Estadísticas */
.notes-drawer-footer {
  display: flex;
  justify-content: space-between;
  padding: 9px 18px;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  font-size: 0.74rem;
  color: var(--text-muted);
  font-weight: 600;
  flex-shrink: 0;
}

#notesFileInput,
#notes-file-input {
  display: none !important;
}

/* ==========================================================================
   14. MODAL DE BIENVENIDA (ONBOARDING)
   ========================================================================== */
.modal-card.modal-welcome {
  max-width: 680px;
  width: 95%;
  padding: 32px 28px;
  text-align: center;
}

.welcome-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 24px;
}

.welcome-logo-img {
  height: 72px;
  width: auto;
  max-width: 230px;
  object-fit: contain;
  margin-bottom: 16px;
  filter: drop-shadow(0 4px 16px var(--primary-glow));
  transition: transform var(--transition-normal);
}

[data-theme="light"] .welcome-logo-img,
[data-theme="clean"] .welcome-logo-img,
[data-theme="lemon"] .welcome-logo-img {
  filter: drop-shadow(0 3px 8px rgba(17, 36, 67, 0.12));
}

[data-theme="ironman"] .welcome-logo-img {
  filter: drop-shadow(0 4px 18px rgba(229, 57, 53, 0.5));
}

.welcome-logo-img:hover {
  transform: scale(1.04);
}

.welcome-title {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.25;
}

.welcome-subtitle {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.5;
  max-width: 520px;
  margin: 0 auto;
}

.welcome-options-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  text-align: left;
}

@media (max-width: 640px) {
  .welcome-options-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
}

.welcome-card {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
}

.welcome-card:hover {
  border-color: var(--border-focus);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.welcome-card-featured {
  border: 1.5px solid var(--primary);
  background: linear-gradient(180deg, var(--primary-subtle) 0%, var(--bg-surface-elevated) 100%);
  box-shadow: 0 4px 18px rgba(99, 102, 241, 0.12);
}

.welcome-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--primary);
  color: #ffffff;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.welcome-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--primary-subtle);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.welcome-card-icon.secondary {
  background: var(--bg-hover);
  color: var(--text-muted);
}

.welcome-card-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.welcome-card-desc {
  font-size: 0.835rem;
  color: var(--text-muted);
  line-height: 1.45;
  margin-bottom: 18px;
  flex: 1;
}

/* ==========================================================================
   15. RECORRIDO GUIADO INTERACTIVO (SPOTLIGHT TOUR)
   ========================================================================== */
.tour-container {
  position: fixed;
  inset: 0;
  z-index: 9500;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.tour-container.hidden {
  display: none !important;
}

.tour-container.active {
  display: block;
}

/* Caja de resalte (Spotlight Cutout) */
.tour-highlight-box {
  position: fixed;
  pointer-events: none;
  border-radius: var(--radius-md);
  box-shadow: 0 0 0 9999px rgba(3, 7, 18, 0.72), 0 0 20px var(--primary-glow);
  border: 2px solid var(--primary);
  transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
  z-index: 9501;
}

[data-theme="light"] .tour-highlight-box,
[data-theme="clean"] .tour-highlight-box {
  box-shadow: 0 0 0 9999px rgba(15, 23, 42, 0.65), 0 0 16px rgba(37, 99, 235, 0.4);
}

/* Tarjeta flotante emergente */
.tour-card {
  position: fixed;
  z-index: 9505;
  pointer-events: auto;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(255, 255, 255, 0.05);
  padding: 20px;
  color: var(--text-main);
  transition: top 0.25s cubic-bezier(0.25, 1, 0.5, 1), left 0.25s cubic-bezier(0.25, 1, 0.5, 1);
  animation: tourCardIn 0.25s ease-out;
}

@keyframes tourCardIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.tour-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.tour-step-badge {
  font-size: 0.73rem;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-subtle);
  padding: 3px 9px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tour-close-btn {
  color: var(--text-muted);
  cursor: pointer;
  background: transparent;
  border: none;
}

.tour-close-btn:hover {
  color: var(--text-main);
  background: var(--bg-hover);
}

.tour-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
  line-height: 1.3;
}

.tour-card-text {
  font-size: 0.865rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 16px;
}

.tour-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 14px;
}

.tour-nav-buttons {
  display: flex;
  align-items: center;
  gap: 8px;
}

.tour-skip-btn {
  color: var(--text-dimmed);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 4px 8px;
  cursor: pointer;
}

.tour-skip-btn:hover {
  color: var(--text-main);
}

/* Flecha indicadora del Tooltip */
.tour-arrow {
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--bg-surface);
  transform: rotate(45deg);
  pointer-events: none;
  z-index: -1;
}

.tour-arrow.arrow-bottom {
  border-left: 1px solid var(--border-subtle);
  border-top: 1px solid var(--border-subtle);
}

.tour-arrow.arrow-top {
  border-right: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.tour-arrow.arrow-left {
  border-top: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
}

.tour-arrow.arrow-right {
  border-bottom: 1px solid var(--border-subtle);
  border-left: 1px solid var(--border-subtle);
}

/* ==========================================================================
   ESTILOS PARA EXPORTACIÓN DUAL (.export-option-card)
   ========================================================================== */
.export-options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 14px;
  margin: 18px 0 12px 0;
}

.export-option-card {
  position: relative;
  border-radius: var(--radius-md);
  padding: 18px 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: all var(--transition-normal);
}

.export-option-card.active {
  border: 2px solid var(--primary);
  background: var(--bg-surface-elevated);
  box-shadow: 0 4px 16px var(--primary-glow);
}

.export-option-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary) !important;
}

.export-option-card:active {
  transform: translateY(0);
}

.export-card-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.export-card-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.export-option-card:hover .export-card-icon {
  transform: scale(1.06);
}

.export-card-icon.zip-icon {
  background: var(--primary-subtle);
  color: var(--primary);
  border: 1px solid var(--primary-glow);
}

.export-card-icon.json-icon {
  background: var(--bg-hover);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
}

.export-card-title-group {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  min-width: 0;
  flex: 1;
}

.export-card-title {
  font-weight: 700;
  color: var(--text-main);
  font-size: 0.95rem;
  line-height: 1.3;
}

.export-badge-recommended {
  display: inline-flex;
  align-items: center;
  background: var(--primary);
  color: #ffffff;
  font-weight: 800;
  font-size: 0.65rem;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 4px;
  line-height: 1;
  box-shadow: 0 2px 6px var(--primary-glow);
}

[data-theme="lemon"] .export-badge-recommended {
  color: #112443;
}

.export-badge-subtle {
  display: inline-flex;
  align-items: center;
  background: var(--bg-hover);
  color: var(--text-dimmed);
  font-weight: 600;
  font-size: 0.68rem;
  padding: 3px 7px;
  border-radius: 4px;
  line-height: 1;
  border: 1px solid var(--border-subtle);
}

.export-card-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.45;
  margin: 0;
}

.export-card-desc code {
  font-size: 0.76rem;
  padding: 2px 5px;
  background: var(--bg-hover);
  border-radius: 3px;
  color: var(--primary);
  font-weight: 600;
}

.export-card-footer {
  font-size: 0.75rem;
  font-weight: 600;
  margin-top: auto;
  padding-top: 2px;
}

.export-card-footer.zip-footer {
  color: var(--primary);
}

.export-card-footer.json-footer {
  color: var(--text-dimmed);
}