/* ============================================
   MIRAI AI - Android 16 Material You Styles v3.0
   Minimalista, colorido, animado — inspirado en Android 16
   ============================================ */

@import url('welcome-styles.css');

/* --- VARIABLES CSS (Temas) --- */

:root {
  /* Paleta de Colores - Tema Claro (Material You Tonal) */
  --bg-primary: #F5F3F8;
  --bg-gradient: linear-gradient(145deg, #F5F3F8 0%, #EDE7F6 40%, #E8EAF6 100%);

  /* Superficies (antes vidrio, ahora sólidas con tinte) */
  --glass-bg: rgba(255, 255, 255, 0.94);
  --glass-border: rgba(103, 80, 164, 0.12);
  --glass-shadow: 0 2px 8px rgba(103, 80, 164, 0.08), 0 6px 24px rgba(0, 0, 0, 0.06);
  --glass-highlight: rgba(234, 221, 255, 0.6);

  /* Tipografía y Color */
  --text-primary: #1C1B1F;
  --text-secondary: #49454F;
  --text-tertiary: #79747E;

  /* Acentos — Paleta Material You vibrante */
  --accent-color: #6750A4;
  --accent-gradient: linear-gradient(135deg, #6750A4 0%, #7F67BE 50%, #9A82DB 100%);
  --accent-glow: rgba(103, 80, 164, 0.18);

  /* Colores secundarios y terciarios (para variedad cromática) */
  --secondary-color: #625B71;
  --secondary-container: #E8DEF8;
  --tertiary-color: #7D5260;
  --tertiary-container: #FFD8E4;

  /* Mensajes */
  --message-user-bg: rgba(103, 80, 164, 0.08);
  --message-user-border: rgba(103, 80, 164, 0.18);
  --message-ai-bg: rgba(255, 255, 255, 0.96);
  --message-ai-border: rgba(103, 80, 164, 0.08);

  /* Bordes y Radio — Más contenidos que Liquid Glass */
  --border-radius-lg: 24px;
  --border-radius-md: 16px;
  --border-radius-sm: 12px;
  --border-radius-pill: 9999px;

  /* Transiciones — Spring physics de Android 16 */
  --ease-elastic: cubic-bezier(0.2, 0, 0, 1);
  --ease-smooth: cubic-bezier(0.05, 0.7, 0.1, 1);
  --transition-fast: 0.25s var(--ease-smooth);
  --transition-slow: 0.5s cubic-bezier(0.05, 0.7, 0.1, 1);
}

/* Tema Oscuro */
[data-theme="dark"] {
  --bg-primary: #141218;
  --bg-gradient: linear-gradient(145deg, #141218 0%, #1D1A22 40%, #211F26 100%);

  --glass-bg: rgba(30, 27, 36, 0.96);
  --glass-border: rgba(207, 188, 255, 0.10);
  --glass-shadow: 0 2px 8px rgba(0, 0, 0, 0.3), 0 6px 24px rgba(0, 0, 0, 0.2);
  --glass-highlight: rgba(207, 188, 255, 0.08);

  --text-primary: #E6E1E5;
  --text-secondary: #CAC4D0;
  --text-tertiary: #938F99;

  --accent-color: #D0BCFF;
  --accent-gradient: linear-gradient(135deg, #D0BCFF 0%, #B69DF8 50%, #9A82DB 100%);
  --accent-glow: rgba(208, 188, 255, 0.15);

  --secondary-color: #CCC2DC;
  --secondary-container: #4A4458;
  --tertiary-color: #EFB8C8;
  --tertiary-container: #633B48;

  --message-user-bg: rgba(208, 188, 255, 0.10);
  --message-user-border: rgba(208, 188, 255, 0.16);
  --message-ai-bg: rgba(33, 30, 38, 0.96);
  --message-ai-border: rgba(208, 188, 255, 0.06);
}

/* --- RESET & BASE --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  background-image: var(--bg-gradient);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
  transition: background 0.6s cubic-bezier(0.05, 0.7, 0.1, 1), color 0.3s cubic-bezier(0.2, 0, 0, 1);
}

/* Fondo Animado — Orbes de color Material You */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    radial-gradient(circle at 25% 25%, rgba(103, 80, 164, 0.12), transparent 45%),
    radial-gradient(circle at 75% 60%, rgba(125, 82, 96, 0.08), transparent 45%),
    radial-gradient(circle at 50% 80%, rgba(98, 91, 113, 0.06), transparent 40%);
  z-index: -1;
  animation: bgFloat 30s ease-in-out infinite;
  pointer-events: none;
}

[data-theme="dark"] body::before {
  background:
    radial-gradient(circle at 25% 25%, rgba(208, 188, 255, 0.06), transparent 45%),
    radial-gradient(circle at 75% 60%, rgba(239, 184, 200, 0.04), transparent 45%),
    radial-gradient(circle at 50% 80%, rgba(204, 194, 220, 0.03), transparent 40%);
}

@keyframes bgFloat {

  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }

  33% {
    transform: translate(-1.5%, -1%) scale(1.01);
  }

  66% {
    transform: translate(1%, -2%) scale(0.99);
  }
}

/* --- CONTENEDOR PRINCIPAL --- */
.chat-container {
  max-width: 1000px;
  margin: 0 auto;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  position: relative;
  padding: 0 10px;
}

/* --- HEADER --- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 16px 24px;
  background: var(--glass-bg);
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition-fast);
}

.header:hover {
  border-bottom: 1px solid var(--glass-border);
  background: var(--glass-bg);
}

.header-title {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Indicador de estado */
.status-dot {
  width: 8px;
  height: 8px;
  background: #386A20;
  border-radius: 50%;
  box-shadow: 0 0 6px rgba(56, 106, 32, 0.5);
  animation: pulse 2.5s cubic-bezier(0.2, 0, 0, 1) infinite;
}

[data-theme="dark"] .status-dot {
  background: #A8D88C;
  box-shadow: 0 0 6px rgba(168, 216, 140, 0.4);
}

@keyframes pulse {

  0%,
  100% {
    opacity: 0.7;
    transform: scale(1);
  }

  50% {
    opacity: 1;
    transform: scale(1.15);
  }
}

.theme-toggle {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-pill);
  padding: 8px 16px;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  overflow: hidden;
}

.theme-toggle::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-color);
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.theme-toggle:hover {
  color: var(--accent-color);
  border-color: var(--accent-color);
  transform: scale(1.03);
}

.theme-toggle:hover::after {
  opacity: 0.06;
}

.theme-toggle:active {
  transform: scale(0.97);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* --- ÁREA DE CHAT --- */
.chat-messages {
  flex: 1;
  padding: 24px 0;
  overflow-y: auto;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Scrollbar — Estilo Android */
.chat-messages::-webkit-scrollbar {
  width: 4px;
}

.chat-messages::-webkit-scrollbar-track {
  background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: var(--accent-color);
  border-radius: 2px;
  opacity: 0.3;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
  opacity: 0.6;
}

/* --- MENSAJES --- */
.message {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  animation: messageEnter 0.45s cubic-bezier(0.05, 0.7, 0.1, 1) forwards;
  opacity: 0;
  transform: translateY(16px);
}

@keyframes messageEnter {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.message-content {
  max-width: 75%;
  padding: 16px 20px;
  border-radius: var(--border-radius-lg);
  font-size: 1rem;
  line-height: 1.65;
  position: relative;
  box-shadow: var(--glass-shadow);
  word-wrap: break-word;
  transition: transform 0.2s cubic-bezier(0.2, 0, 0, 1), box-shadow 0.2s cubic-bezier(0.2, 0, 0, 1);
}

.message-content:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(103, 80, 164, 0.12), 0 8px 32px rgba(0, 0, 0, 0.08);
}

/* Estilo Usuario */
.message.user .message-content {
  background: var(--message-user-bg);
  border: 1px solid var(--message-user-border);
  border-bottom-right-radius: 6px;
  color: var(--text-primary);
}

/* Estilo AI */
.message.ai .message-content {
  background: var(--message-ai-bg);
  border: 1px solid var(--message-ai-border);
  border-bottom-left-radius: 6px;
  color: var(--text-primary);
}

/* Estilo Sistema */
.message.system {
  justify-content: center;
  width: 100%;
}

.message.system .message-content {
  background: transparent;
  border: none;
  box-shadow: none;
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.85rem;
  padding: 8px 16px;
  max-width: 100%;
  font-style: italic;
}

.message-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  background: var(--accent-gradient);
  color: white;
  flex-shrink: 0;
  box-shadow: 0 2px 8px var(--accent-glow);
  transition: transform 0.2s cubic-bezier(0.2, 0, 0, 1);
}

.message:hover .message-avatar {
  transform: scale(1.05);
}

.message-time {
  font-size: 0.7rem;
  color: var(--text-tertiary);
  margin-top: 6px;
  text-align: right;
  opacity: 0.8;
}

/* --- INPUT AREA --- */
.input-area {
  position: sticky;
  bottom: 0;
  /* ← de 20px a 0 */
  padding: 0 0 12px 0;
  z-index: 90;
  display: flex;
  justify-content: center;
  flex-direction: column;
}

.input-wrapper {
  width: 100%;
  max-width: 800px;
  background: var(--glass-bg);
  border: 2px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  padding: 8px 8px 8px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--glass-shadow);
  transition: all 0.3s cubic-bezier(0.05, 0.7, 0.1, 1);
}

.input-wrapper:focus-within {
  border-color: var(--accent-color);
  box-shadow: 0 2px 12px var(--accent-glow), 0 8px 32px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
}

.message-input {
  flex: 1;
  background: transparent;
  border: none;
  font-size: 1rem;
  color: var(--text-primary);
  resize: none;
  height: 40px;
  max-height: 120px;
  padding: 0;
  font-family: inherit;
  outline: none;
}

.message-input::placeholder {
  color: var(--text-tertiary);
}

.send-button {
  width: 44px;
  height: 44px;
  border: none;
  border-radius: var(--border-radius-md);
  background: var(--accent-gradient);
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s cubic-bezier(0.2, 0, 0, 1);
  flex-shrink: 0;
  box-shadow: 0 2px 8px var(--accent-glow);
  position: relative;
  overflow: hidden;
}

.send-button::after {
  content: '';
  position: absolute;
  inset: 0;
  background: white;
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.2s;
}

.send-button:hover:not(:disabled) {
  transform: scale(1.08);
  box-shadow: 0 4px 16px var(--accent-glow);
}

.send-button:active:not(:disabled) {
  transform: scale(0.92);
}

.send-button:active:not(:disabled)::after {
  opacity: 0.15;
}

.send-button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.send-button svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
  margin-left: 2px;
  position: relative;
  z-index: 1;
  transition: all 0.2s ease;
}


/* --- ESTADO DE CARGA --- */
.typing-indicator {
  display: flex;
  gap: 6px;
  padding: 12px 16px;
  background: var(--message-ai-bg);
  border-radius: var(--border-radius-lg);
  border-bottom-left-radius: 6px;
  width: fit-content;
  margin-left: 48px;
}

.typing-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-color);
  animation: typingBounce 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) {
  animation-delay: 0s;
}

.typing-dot:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typingBounce {

  0%,
  60%,
  100% {
    transform: translateY(0) scale(1);
    opacity: 0.4;
  }

  30% {
    transform: translateY(-6px) scale(1.2);
    opacity: 1;
  }
}

/* --- BOTONES DE ACCIÓN --- */
.action-buttons {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.action-btn {
  background: var(--secondary-container);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  padding: 6px 12px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-weight: 500;
}

.action-btn:hover {
  background: var(--accent-glow);
  color: var(--accent-color);
  border-color: var(--accent-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--accent-glow);
}

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

@media (min-width: 769px) {
  .input-area {
    align-items: center;
  }

  .quick-actions-bar {
    width: 100%;
    max-width: 800px;
  }
}

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
  .chat-container {
    max-width: 100%;
    padding: 0;
  }

  .header {
    padding: 12px 16px;
    background: var(--glass-bg);
  }

  .header-title {
    font-size: 1.15rem;
  }

  .chat-messages {
    padding: 16px 12px;
    gap: 16px;
  }

  .message-content {
    max-width: 85%;
    padding: 14px 16px;
    font-size: 0.95rem;
  }

  .input-area {
    bottom: 0;
    padding-bottom: max(12px, env(safe-area-inset-bottom));
    padding: 12px 16px 16px;
    background: transparent;
    box-shadow: none;
  }

  .input-wrapper {
    border-radius: var(--border-radius-lg);
    padding: 8px 12px;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.05);
  }

  .send-button {
    width: 40px;
    height: 40px;
  }

  .typing-indicator {
    margin-left: 40px;
  }
}

/* --- UTILIDADES --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.hidden {
  display: none !important;
}

/* Prevenir selección en móvil para mejor UX táctil */
@media (hover: none) and (pointer: coarse) {
  .message-content {
    user-select: none;
  }

  .send-button:active {
    opacity: 0.8;
  }
}

/* ============================================
   MENÚ LATERAL - SIDEBAR PERMANENTE (PC) + DESLIZABLE (MÓVIL)
   ============================================ */

/* --- ESTADOS BASE (Aplica para PC) --- */
.mobile-menu-toggle {
  display: none;
  /* Oculto en PC por defecto */
}


.mobile-overlay {
  display: none;
}

/* Sidebar - Siempre visible en PC */
.mobile-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 280px;
  height: 100vh;
  background: var(--glass-bg);
  border-right: 1px solid var(--glass-border);
  z-index: 100;
  display: flex;
  flex-direction: column;
  box-shadow: 4px 0 24px rgba(0, 0, 0, 0.06);
  overflow: hidden;
  transition: transform 0.4s cubic-bezier(0.05, 0.7, 0.1, 1);
}

/* Botón de cierre oculto en PC */
.close-menu {
  display: none;
}

/* Empujar el contenido principal a la derecha en PC */
.chat-container,
.header,
footer.footer {
  margin-left: 280px;
  transition: margin-left 0.4s cubic-bezier(0.05, 0.7, 0.1, 1);
}

/* Header del Sidebar */
.sidebar-header {
  padding: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--glass-border);
  background: var(--secondary-container);
}

.sidebar-header h3 {
  font-size: 1.2rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0;
}

/* Contenido del Sidebar */
.sidebar-content {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.sidebar-content::-webkit-scrollbar {
  width: 4px;
}

.sidebar-content::-webkit-scrollbar-thumb {
  background: var(--accent-color);
  border-radius: 2px;
}

.sidebar-section {
  margin-bottom: 24px;
}

.sidebar-section h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: 12px;
  font-weight: 600;
}

.sidebar-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-links li {
  margin-bottom: 4px;
}

.sidebar-links a {
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 10px 12px;
  display: block;
  border-radius: var(--border-radius-sm);
  transition: all 0.25s cubic-bezier(0.05, 0.7, 0.1, 1);
  border-left: 3px solid transparent;
  position: relative;
  overflow: hidden;
}

.sidebar-links a::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-color);
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.25s;
  pointer-events: none;
}

.sidebar-links a:hover {
  color: var(--accent-color);
  border-left-color: var(--accent-color);
  background: var(--message-user-bg);
}

.sidebar-links a:hover::before {
  opacity: 0.06;
}

.sidebar-links a.active-link {
  color: var(--accent-color);
  background: var(--secondary-container);
  border-left-color: var(--accent-color);
  font-weight: 600;
}

/* Redes Sociales */
.sidebar-social {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.sidebar-social a {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius-md);
  background: var(--secondary-container);
  border: 1px solid var(--glass-border);
  transition: all 0.25s cubic-bezier(0.2, 0, 0, 1);
}

.sidebar-social a:hover {
  background: var(--accent-gradient);
  border-color: transparent;
  transform: scale(1.15) rotate(-5deg);
  box-shadow: 0 4px 12px var(--accent-glow);
}

.sidebar-social img {
  width: 22px;
  height: 22px;
}

/* Logo en Sidebar */
.sidebar-logo {
  text-align: center;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--glass-border);
}

.sidebar-logo img {
  max-width: 110px;
  height: auto;
}

/* Footer del Sidebar */
.sidebar-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--glass-border);
  text-align: center;
  background: var(--secondary-container);
}

.sidebar-footer p {
  font-size: 0.72rem;
  color: var(--text-secondary);
  margin: 0;
}

/* ============================================
   MÓVIL - SIDEBAR DESLIZABLE
   ============================================ */

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex !important;
    position: relative !important;
    /* <-- cambia fixed → relative */
    top: unset !important;
    left: unset !important;
    z-index: 1 !important;
    /* ya no necesita z-index alto */
    width: 48px;
    height: 48px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  }

  .chat-container,
  .header,
  footer.footer,
  .main-content {
    margin-left: 0 !important;
    padding-left: 0 !important;
  }

  .hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
  }

  .mobile-menu-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .mobile-menu-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
  }

  .mobile-menu-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .mobile-menu-toggle:hover {
    background: var(--secondary-container);
    border-color: var(--accent-color);
  }

  .mobile-menu-toggle:active {
    transform: scale(0.95);
  }

  /* Overlay visible en móvil */
  .mobile-overlay {
    display: block !important;
    position: fixed !important;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1999 !important;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease !important;
  }


  .mobile-overlay.active {
    opacity: 1 !important;
    pointer-events: auto !important;
  }

  /* Sidebar oculto por defecto en móvil */
  .mobile-sidebar {
    z-index: 1000;
  }

  .mobile-sidebar.active {
    transform: translateX(0);
  }

  /* Botón de cierre visible en móvil */
  .close-menu {
    display: block !important;
    background: transparent;
    border: none;
    font-size: 2rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0;
    line-height: 1;
  }

  .close-menu:hover {
    color: var(--text-primary);
  }

  /* Contenido principal SIN margen en móvil */
  .chat-container,
  .header,
  footer.footer {
    margin-left: 0;
  }

  /* Header con desenfoque en móvil */
  .header {
    background: var(--glass-bg);
  }
}

.clear-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  padding: 8px;
  border-radius: var(--border-radius-sm);
  transition: all 0.25s cubic-bezier(0.2, 0, 0, 1);
}

.clear-btn:hover {
  background: rgba(255, 100, 100, 0.1);
  transform: scale(1.15);
}

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

/* --- BOTÓN DE VOZ --- */
.voice-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--border-radius-md);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  position: relative;
}

.voice-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-color);
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.25s;
}

.voice-btn:hover {
  background: var(--message-user-bg);
  color: var(--accent-color);
}

.voice-btn:hover::after {
  opacity: 0.06;
}

.voice-btn svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
  transition: fill var(--transition-fast);
}

/* Estado: Escuchando */
.voice-btn.listening {
  color: #D00000;
  background: rgba(208, 0, 0, 0.1);
  animation: pulse-red 1.5s cubic-bezier(0.2, 0, 0, 1) infinite;
}

.voice-btn.listening svg {
  fill: #D00000;
}

/* Animación de pulso para estado escuchando */
@keyframes pulse-red {
  0% {
    box-shadow: 0 0 0 0 rgba(208, 0, 0, 0.4);
  }

  70% {
    box-shadow: 0 0 0 12px rgba(208, 0, 0, 0);
  }

  100% {
    box-shadow: 0 0 0 0 rgba(208, 0, 0, 0);
  }
}

/* Ajuste para móvil */
@media (max-width: 768px) {
  .voice-btn {
    width: 36px;
    height: 36px;
  }

  .voice-btn svg {
    width: 20px;
    height: 20px;
  }
}

/* --- BOTÓN DE ADJUNTAR --- */
.attach-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--border-radius-md);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  position: relative;
}

.attach-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-color);
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.25s;
}

.attach-btn svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
  transition: fill var(--transition-fast);
}

.attach-btn:hover {
  background: var(--message-user-bg);
  color: var(--accent-color);
}

.attach-btn:hover::after {
  opacity: 0.06;
}

/* --- ÁREA DE ADJUNTOS --- */
.attachments-area {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 4px 0;
  margin-right: 8px;
}

.attachment-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--message-user-bg);
  border: 1px solid var(--message-user-border);
  border-radius: var(--border-radius-sm);
  padding: 4px 10px;
  font-size: 0.8rem;
  color: var(--text-primary);
  max-width: 150px;
  overflow: hidden;
  animation: chipEnter 0.3s cubic-bezier(0.05, 0.7, 0.1, 1);
}

@keyframes chipEnter {
  from {
    opacity: 0;
    transform: scale(0.85);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

.attachment-chip .attachment-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100px;
}

.attachment-chip .attachment-remove {
  cursor: pointer;
  color: var(--text-tertiary);
  font-size: 1rem;
  line-height: 1;
  padding: 0 2px;
  transition: color 0.2s;
}

.attachment-chip .attachment-remove:hover {
  color: #D00000;
}

.attachment-chip .attachment-icon {
  font-size: 1rem;
}

/* --- ZONA DE ARRASTRAR Y SOLTAR --- */
.drop-zone-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.drop-zone-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.drop-zone-content {
  background: var(--glass-bg);
  border: 2px dashed var(--accent-color);
  border-radius: var(--border-radius-lg);
  padding: 40px;
  text-align: center;
  transform: scale(0.9);
  transition: transform 0.3s cubic-bezier(0.05, 0.7, 0.1, 1);
  box-shadow: var(--glass-shadow);
}

.drop-zone-overlay.active .drop-zone-content {
  transform: scale(1);
}

.drop-zone-content h3 {
  color: var(--text-primary);
  margin-bottom: 12px;
  font-size: 1.2rem;
}

.drop-zone-content p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Ajuste para móvil */
@media (max-width: 768px) {
  .attach-btn {
    width: 36px;
    height: 36px;
  }

  .attach-btn svg {
    width: 20px;
    height: 20px;
  }

  .attachment-chip {
    font-size: 0.7rem;
    padding: 3px 8px;
  }
}

/* ============================================
   ESTILOS DE MARKDOWN
   ============================================ */

/* --- ENCABEZADOS --- */
.md-heading {
  margin: 16px 0 8px 0;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
  border-bottom: 1px solid var(--glass-border);
  padding-bottom: 4px;
}

.md-heading:first-child {
  margin-top: 0;
}

.md-heading:last-child {
  margin-bottom: 8px;
}

/* Tamaño progresivo de encabezados */
.md-heading h1,
.message-content h1 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.md-heading h2,
.message-content h2 {
  font-size: 1.35rem;
  margin-bottom: 10px;
}

.md-heading h3,
.message-content h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.md-heading h4,
.message-content h4 {
  font-size: 1.1rem;
  margin-bottom: 6px;
}

.md-heading h5,
.message-content h5 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.md-heading h6,
.message-content h6 {
  font-size: 0.9rem;
  margin-bottom: 4px;
  color: var(--text-secondary);
}

/* --- CÓDIGO --- */
.code-block {
  background: var(--secondary-container);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  padding: 16px;
  margin: 12px 0;
  overflow-x: auto;
  font-family: 'Roboto Mono', 'SF Mono', 'Monaco', 'Courier New', monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--text-primary);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] .code-block {
  background: var(--secondary-color);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.inline-code {
  background: var(--message-user-bg);
  border: 1px solid var(--message-user-border);
  border-radius: 4px;
  padding: 2px 6px;
  font-family: 'Roboto Mono', 'SF Mono', 'Monaco', 'Courier New', monospace;
  font-size: 0.85em;
  color: var(--accent-color);
}

/* --- LISTAS --- */
.md-list {
  margin: 8px 0;
  padding-left: 24px;
  list-style-type: none;
}

.md-list-item {
  margin: 4px 0;
  padding-left: 8px;
  position: relative;
}

.md-list-item::before {
  content: "•";
  color: var(--accent-color);
  font-weight: bold;
  position: absolute;
  left: 0;
}

/* Listas numeradas */
.md-list ol .md-list-item::before {
  content: counter(list-item) ".";
  counter-increment: list-item;
}

/* --- BLOCKQUOTE --- */
.md-blockquote {
  border-left: 4px solid var(--accent-color);
  margin: 12px 0;
  padding: 8px 16px;
  background: var(--message-user-bg);
  border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
  color: var(--text-secondary);
  font-style: italic;
}

/* --- ENLACES --- */
.md-link {
  color: var(--accent-color);
  text-decoration: none;
  border-bottom: 1px dotted var(--accent-color);
  transition: all var(--transition-fast);
}

.md-link:hover {
  color: var(--text-primary);
  border-bottom-style: solid;
}

/* --- LÍNEA HORIZONTAL --- */
.md-hr {
  border: none;
  height: 1px;
  background: var(--glass-border);
  margin: 16px 0;
}

/* --- TABLAS (si la IA genera tablas) --- */
.md-table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 0.9rem;
}

.md-table th,
.md-table td {
  border: 1px solid var(--glass-border);
  padding: 8px 12px;
  text-align: left;
}

.md-table th {
  background: var(--secondary-container);
  font-weight: 600;
}

.md-table tr:nth-child(even) {
  background: rgba(0, 0, 0, 0.02);
}

[data-theme="dark"] .md-table tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}

/* --- RESPONSIVE PARA CÓDIGO --- */
@media (max-width: 768px) {
  .code-block {
    font-size: 0.75rem;
    padding: 12px;
  }

  .md-heading h1 {
    font-size: 1.25rem;
  }

  .md-heading h2 {
    font-size: 1.15rem;
  }

  .md-heading h3 {
    font-size: 1.05rem;
  }
}

/* ============================================
   ESTILOS PARA BLOQUES DE CÓDIGO CON BOTÓN COPIAR
   ============================================ */

/* Contenedor del bloque de código */
.code-block-wrapper {
  margin: 12px 0;
  border-radius: var(--border-radius-sm);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  background: var(--secondary-container);
  box-shadow: var(--glass-shadow);
}

[data-theme="dark"] .code-block-wrapper {
  background: var(--secondary-color);
}

/* Cabecera del bloque de código */
.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: rgba(0, 0, 0, 0.04);
  border-bottom: 1px solid var(--glass-border);
  font-size: 0.75rem;
}

[data-theme="dark"] .code-header {
  background: rgba(255, 255, 255, 0.04);
}

.code-lang {
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Botón de copiar */
.copy-code-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  background: transparent;
  border: 1px solid var(--glass-border);
  border-radius: 6px;
  padding: 4px 8px;
  cursor: pointer;
  font-size: 0.7rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  font-weight: 500;
  position: relative;
  overflow: hidden;
}

.copy-code-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-color);
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.25s;
}

.copy-code-btn:hover {
  color: var(--accent-color);
  border-color: var(--accent-color);
}

.copy-code-btn:hover::after {
  opacity: 0.06;
}

.copy-code-btn svg {
  fill: currentColor;
}

/* Estado: Copiado */
.copy-code-btn.copied {
  background: rgba(56, 106, 32, 0.1);
  color: #386A20;
  border-color: #386A20;
}

[data-theme="dark"] .copy-code-btn.copied {
  background: rgba(168, 216, 140, 0.1);
  color: #A8D88C;
  border-color: #A8D88C;
}

.copy-code-btn.copied svg {
  fill: currentColor;
}

/* Estado: Error */
.copy-code-btn.error {
  background: rgba(208, 0, 0, 0.1);
  color: #D00000;
  border-color: #D00000;
}

.copy-code-btn.error svg {
  fill: #D00000;
}

/* Bloque de código */
.code-block {
  margin: 0;
  padding: 16px;
  overflow-x: auto;
  font-family: 'Roboto Mono', 'SF Mono', 'Monaco', 'Courier New', monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--text-primary);
  background: transparent;
  border: none;
}

/* Resaltar sintaxis básico (colores por lenguaje) */
.code-block .language-javascript,
.code-block .language-js {
  color: #F7DF1E;
}

.code-block .language-python {
  color: #3776AB;
}

.code-block .language-html {
  color: #E34C26;
}

.code-block .language-css {
  color: #264DE4;
}

.code-block .language-json {
  color: #F1E05A;
}

.code-block .language-bash {
  color: #4EAA25;
}

.code-block .language-sql {
  color: #00758F;
}

/* Código inline */
.inline-code {
  background: var(--message-user-bg);
  border: 1px solid var(--message-user-border);
  border-radius: 4px;
  padding: 2px 6px;
  font-family: 'Roboto Mono', 'SF Mono', 'Monaco', 'Courier New', monospace;
  font-size: 0.85em;
  color: var(--accent-color);
  word-break: break-word;
}

/* code-header como footer */
.code-block-wrapper .code-header {
  border-bottom: none;
  border-top: 1px solid var(--glass-border);
}

/* Asegurar que el texto sea seleccionable */
.message-content {
  user-select: text;
  -webkit-user-select: text;
  -moz-user-select: text;
  -ms-user-select: text;
}

/* En móviles, permitir selección pero con cuidado */
@media (hover: none) and (pointer: coarse) {
  .message-content {
    user-select: text;
  }

  .copy-code-btn {
    padding: 6px 10px;
    font-size: 0.75rem;
  }
}

/* ============================================
   META ROW: HORA + BOTONES DE ACCIÓN (DENTRO DEL MENSAJE)
   ============================================ */

.message-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--glass-border);
  gap: 8px;
}

.message-time {
  font-size: 0.7rem;
  color: var(--text-tertiary);
  opacity: 0.8;
}

/* --- BOTONES DE ACCIÓN INLINE --- */
.message-actions {
  display: flex;
  align-items: center;
  gap: 2px;
}

.msg-action {
  background: transparent;
  border: none;
  border-radius: 6px;
  padding: 4px 6px;
  cursor: pointer;
  color: var(--text-tertiary);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  position: relative;
  overflow: hidden;
}

.msg-action::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-color);
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.25s;
}

.msg-action svg {
  fill: currentColor;
}

/* Mostrar botones al hacer hover sobre el mensaje */
.message.ai:hover .msg-action,
.message.ai .msg-action:focus {
  opacity: 1;
}

/* En móvil siempre visibles pero sutiles */
@media (hover: none) and (pointer: coarse) {
  .msg-action {
    opacity: 0.5;
  }
}

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

.msg-action:hover::after {
  opacity: 0.06;
}

.msg-action.success {
  color: #386A20;
  opacity: 1;
}

[data-theme="dark"] .msg-action.success {
  color: #A8D88C;
}

.msg-action.error {
  color: #D00000;
  opacity: 1;
}

/* --- WRAPPER PARA MENÚ DE OPCIONES --- */
.options-wrapper {
  position: relative;
}

/* --- MENÚ DESPLEGABLE --- */
.action-menu {
  position: absolute;
  bottom: calc(100% + 6px);
  right: 0;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  min-width: 160px;
  z-index: 200;
  overflow: hidden;
  animation: menuSlideUp 0.25s cubic-bezier(0.05, 0.7, 0.1, 1);
}

@keyframes menuSlideUp {
  from {
    opacity: 0;
    transform: translateY(6px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.menu-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
  width: 100%;
  text-align: left;
  font-size: 0.85rem;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.menu-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-color);
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.25s;
}

.menu-item:hover {
  color: var(--accent-color);
  background: var(--message-user-bg);
}

.menu-item:hover::after {
  opacity: 0.06;
}

.menu-item span {
  font-size: 1rem;
}

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
  .message-meta {
    margin-top: 8px;
    padding-top: 6px;
  }

  .msg-action {
    padding: 3px 5px;
  }

  .action-menu {
    min-width: 140px;
    right: -8px;
  }

  .menu-item {
    padding: 8px 12px;
    font-size: 0.8rem;
  }
}

/* Botón de editar */
.edit-btn {
  /* Hereda estilos de .msg-action */
}

.edit-btn:hover {
  color: #FF9F0A;
}

/* ============================================
   LISTA DE CONVERSACIONES EN SIDEBAR
   ============================================ */

.conversations-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.conversations-header h4 {
  margin: 0;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  font-weight: 600;
}

.new-conv-btn {
  background: var(--accent-gradient);
  border: none;
  border-radius: var(--border-radius-sm);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.2, 0, 0, 1);
  padding: 0;
  box-shadow: 0 2px 6px var(--accent-glow);
  position: relative;
  overflow: hidden;
}

.new-conv-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: white;
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.2s;
}

.new-conv-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 12px var(--accent-glow);
}

.new-conv-btn:active::after {
  opacity: 0.15;
}

.new-conv-btn svg {
  fill: white;
  position: relative;
  z-index: 1;
}

.conversations-list {
  flex: 1;
  overflow-y: auto;
  min-height: 0;
}

.conversations-list::-webkit-scrollbar {
  width: 3px;
}

.conversations-list::-webkit-scrollbar-thumb {
  background: var(--accent-color);
  border-radius: 2px;
}

.conv-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.05, 0.7, 0.1, 1);
  border-left: 3px solid transparent;
  position: relative;
  overflow: hidden;
}

.conv-item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-color);
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.25s;
}

.conv-item:hover {
  background: var(--message-user-bg);
  border-left-color: var(--accent-color);
}

.conv-item:hover::before {
  opacity: 0.06;
}

.conv-item.active {
  background: var(--secondary-container);
  border-left-color: var(--accent-color);
  font-weight: 500;
}

.conv-item-icon {
  font-size: 0.9rem;
  flex-shrink: 0;
}

.conv-item-info {
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.conv-item-title {
  font-size: 0.85rem;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: block;
}

.conv-item-date {
  font-size: 0.65rem;
  color: var(--text-tertiary);
  display: block;
  margin-top: 2px;
}

.conv-item-actions {
  display: flex;
  gap: 2px;
  opacity: 0;
  transition: opacity 0.2s;
  flex-shrink: 0;
}

.conv-item:hover .conv-item-actions {
  opacity: 1;
}

.conv-action-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  color: var(--text-tertiary);
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.conv-action-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-color);
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.2s;
}

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

.conv-action-btn:hover::after {
  opacity: 0.06;
}

.conv-action-btn.delete:hover {
  color: #D00000;
}

.conv-action-btn svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

/* Input para renombrar */
.conv-rename-input {
  width: 100%;
  background: var(--bg-primary);
  border: 2px solid var(--accent-color);
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 0.85rem;
  color: var(--text-primary);
  font-family: inherit;
  outline: none;
}

/* Estado vacío */
.conv-empty {
  text-align: center;
  padding: 20px 12px;
  color: var(--text-tertiary);
  font-size: 0.8rem;
  font-style: italic;
}

/* Responsive móvil */
@media (max-width: 768px) {
  .conversations-list {
    max-height: 200px;
  }
}

/* ============================================
   REPRODUCTOR DE AUDIO TTS
   ============================================ */

.audio-player-wrapper {
  margin-top: 12px;
  padding: 12px;
  background: var(--secondary-container);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  width: 100%;
  transition: all var(--transition-fast);
}

.audio-player-wrapper.playing {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.audio-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.audio-icon {
  font-size: 1rem;
}

.audio-label {
  font-weight: 600;
  color: var(--text-primary);
}

.audio-status {
  font-size: 0.7rem;
  color: var(--text-tertiary);
}

.audio-player {
  display: none;
}

.audio-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.audio-play-btn {
  background: var(--accent-gradient);
  border: none;
  border-radius: var(--border-radius-md);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: white;
  transition: all 0.25s cubic-bezier(0.2, 0, 0, 1);
  flex-shrink: 0;
  box-shadow: 0 2px 8px var(--accent-glow);
  position: relative;
  overflow: hidden;
}

.audio-play-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: white;
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.2s;
}

.audio-play-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 16px var(--accent-glow);
}

.audio-play-btn:active::after {
  opacity: 0.15;
}

.audio-play-btn svg {
  fill: white;
  position: relative;
  z-index: 1;
}

.icon-pause {
  display: none;
}

.audio-player-wrapper.playing .icon-play {
  display: none;
}

.audio-player-wrapper.playing .icon-pause {
  display: block;
}

.audio-progress {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
}

.audio-progress-bar {
  flex: 1;
  height: 4px;
  background: var(--glass-border);
  border-radius: 2px;
  cursor: pointer;
  position: relative;
}

.audio-progress-fill {
  height: 100%;
  background: var(--accent-gradient);
  border-radius: 2px;
  width: 0%;
  transition: width 0.1s linear;
}

.audio-time-current,
.audio-time-total {
  font-size: 0.7rem;
  color: var(--text-tertiary);
  min-width: 35px;
}

.audio-speed-btn {
  background: transparent;
  border: 1px solid var(--glass-border);
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 0.7rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.audio-speed-btn:hover {
  background: var(--message-user-bg);
  color: var(--accent-color);
  border-color: var(--accent-color);
}

/* Responsive móvil */
@media (max-width: 768px) {
  .audio-player-wrapper {
    padding: 10px;
  }

  .audio-play-btn {
    width: 36px;
    height: 36px;
  }

  .audio-controls {
    gap: 8px;
  }
}

/* ============================================
   BOTÓN MODO AUDIO
   ============================================ */

.audio-mode-toggle {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-pill);
  padding: 8px 16px;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  overflow: hidden;
}

.audio-mode-toggle::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-color);
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.25s;
}

.audio-mode-toggle:hover {
  color: var(--accent-color);
  border-color: var(--accent-color);
}

.audio-mode-toggle:hover::after {
  opacity: 0.06;
}

.audio-mode-toggle.active {
  background: var(--accent-gradient);
  color: white;
  border-color: transparent;
}

.audio-mode-toggle.text-mode {
  background: rgba(255, 100, 100, 0.1);
  color: #D00000;
  border-color: #D00000;
}

.audio-mode-icon {
  font-size: 1rem;
}

/* Responsive móvil */
@media (max-width: 768px) {
  .audio-mode-toggle {
    padding: 6px 12px;
    font-size: 0.75rem;
  }

  .audio-mode-label {
    display: none;
  }
}

/* Reproductor de Audio estilo Material */
.audio-player-container {
  background: var(--secondary-container);
  border-radius: var(--border-radius-md);
  padding: 10px;
  margin: 5px 0;
  min-width: 200px;
  max-width: 300px;
  border: 1px solid var(--glass-border);
}

[data-theme='dark'] .audio-player-container {
  background: var(--secondary-color);
}

.audio-player-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 0.9em;
  color: var(--text-secondary);
}

.custom-audio-player {
  width: 100%;
  height: 35px;
  outline: none;
}

.custom-audio-player::-webkit-media-controls-panel {
  background-color: var(--secondary-container);
}

[data-theme='dark'] .custom-audio-player::-webkit-media-controls-panel {
  background-color: var(--secondary-color);
}

.audio-duration {
  display: flex;
  justify-content: space-between;
  font-size: 0.8em;
  color: var(--text-tertiary);
  margin-top: 5px;
}

/* ============================================
   INDICADOR DE GRABACIÓN (MICRÓFONO)
   ============================================ */

.recording-indicator {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--message-ai-bg);
  border-radius: var(--border-radius-lg);
  border-bottom-left-radius: 6px;
  width: fit-content;
  margin-left: 48px;
  color: var(--text-primary);
  box-shadow: var(--glass-shadow);
}

.mic-icon {
  color: #D00000;
  animation: pulse-mic 1.5s cubic-bezier(0.2, 0, 0, 1) infinite;
}

.mic-icon svg {
  fill: currentColor;
  width: 28px;
  height: 28px;
}

@keyframes pulse-mic {

  0%,
  100% {
    transform: scale(1);
    opacity: 1;
  }

  50% {
    transform: scale(1.15);
    opacity: 0.85;
  }
}

.sound-waves {
  display: flex;
  gap: 4px;
  align-items: center;
  height: 20px;
}

.sound-waves span {
  width: 4px;
  height: 100%;
  background: var(--accent-color);
  border-radius: 2px;
  animation: wave 1s infinite ease-in-out;
}

.sound-waves span:nth-child(1) {
  animation-delay: 0s;
}

.sound-waves span:nth-child(2) {
  animation-delay: 0.2s;
}

.sound-waves span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes wave {

  0%,
  100% {
    height: 4px;
  }

  50% {
    height: 20px;
  }
}

.recording-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Utilidad para ocultar */
.hidden {
  display: none !important;
}

/* ============================================
   LIGHTBOX / MODAL PARA IMÁGENES
   ============================================ */

.image-lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.image-lightbox.hidden {
  display: none;
}

.lightbox-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(4px);
}

.lightbox-content {
  position: relative;
  max-width: 95%;
  max-height: 95%;
  z-index: 1001;
}

.lightbox-content img {
  max-width: 100%;
  max-height: 90vh;
  border-radius: var(--border-radius-md);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.lightbox-close,
.lightbox-download {
  position: absolute;
  top: -50px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-primary);
  transition: all 0.25s cubic-bezier(0.2, 0, 0, 1);
  z-index: 1002;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.lightbox-close:hover,
.lightbox-download:hover {
  background: var(--accent-color);
  color: white;
  transform: scale(1.1);
}

.lightbox-close {
  right: 0;
}

.lightbox-download {
  right: 56px;
}

.lightbox-close svg,
.lightbox-download svg {
  fill: currentColor;
}

/* Responsive móvil */
@media (max-width: 768px) {

  .lightbox-close,
  .lightbox-download {
    width: 36px;
    height: 36px;
    top: 10px;
  }

  .lightbox-download {
    right: 52px;
  }

  .lightbox-content img {
    max-height: 80vh;
  }
}

/* ============================================
   ESTILOS DE IMÁGENES Y BOTÓN DE DESCARGA
   ============================================ */

.image-container {
  position: relative;
  display: flex;
  flex-direction: column;
  margin: 10px 0;
  max-width: 100%;
}

.image-toolbar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding: 6px 0;
  position: relative;
}

.md-image {
  max-width: 100%;
  border-radius: var(--border-radius-md);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  display: block;
  height: auto;
  cursor: zoom-in;
  transition: transform 0.25s cubic-bezier(0.2, 0, 0, 1);
}

.md-image:hover {
  transform: scale(1.02);
}

/* Botón de descarga flotante */
.image-download-btn {
  color: var(--text-primary, #ffffff);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  padding: 6px 12px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.2, 0, 0, 1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  color: var(--accent-color);
  font-size: 0.75rem;
  font-weight: 500;
  font-family: inherit;
  overflow: hidden;
}

.image-download-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-color);
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.25s;
}

[data-theme="dark"] .image-download-btn {
  background: var(--secondary-container);
  border-color: var(--glass-border);
  color: var(--accent-color);
}

.image-download-btn:hover {
  background: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px var(--accent-glow);
}

.image-download-btn:hover::after {
  opacity: 0.08;
}

[data-theme="dark"] .image-download-btn:hover {
  background: var(--accent-color);
  color: #141218;
  border-color: var(--accent-color);
}

.image-download-btn svg {
  width: 16px;
  height: 16px;
  fill: currentColor !important;
  flex-shrink: 0;
  transition: fill 0.2s ease;
  position: relative;
  z-index: 1;
}

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

.image-download-btn .download-label {
  color: currentColor;
  transition: color 0.2s ease;
}

/* Ajuste para móvil */
@media (max-width: 768px) {
  .image-download-btn {
    padding: 5px 10px;
    font-size: 0.7rem;
  }

  .image-download-btn svg {
    width: 14px;
    height: 14px;
  }
}

/* Grid de Cursos */
.courses-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 30px;
}

/* Tarjeta de Curso */
.course-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  padding: 24px;
  transition: all 0.35s cubic-bezier(0.05, 0.7, 0.1, 1);
  display: flex;
  flex-direction: column;
  height: 100%;
  box-shadow: var(--glass-shadow);
  position: relative;
  overflow: hidden;
}

.course-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity 0.3s;
}

.course-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.1), 0 4px 20px var(--accent-glow);
  border-color: var(--accent-color);
}

.course-card:hover::before {
  opacity: 1;
}

/* Responsive */
@media (max-width: 1200px) {
  .courses-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 900px) {
  .courses-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.sidebar-links a.active-link {
  color: var(--accent-color);
  background: var(--secondary-container);
  border-left-color: var(--accent-color);
  font-weight: 600;
}

svg {
  display: block;
}

/* ============================================
           COURSES PAGE - Estilos Específicos
           ============================================ */

/* Hero Section */
.courses-hero {
  text-align: center;
  padding: 60px 20px 20px;
}

.courses-hero h1 {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.courses-hero p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Barra de Búsqueda y Filtros */
.courses-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 20px 20px 8px;
  max-width: 1200px;
  margin: 0 auto;
  align-items: center;
}

.courses-search {
  flex: 1;
  min-width: 220px;
  position: relative;
}

.courses-search input {
  width: 100%;
  padding: 12px 16px 12px 44px;
  border: 2px solid var(--glass-border);
  border-radius: var(--border-radius-pill);
  background: var(--glass-bg);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: all var(--transition-fast);
}

.courses-search input:focus {
  border-color: var(--accent-color);
  box-shadow: 0 2px 12px var(--accent-glow);
}

.courses-search input::placeholder {
  color: var(--text-tertiary);
}

.courses-search svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  fill: var(--text-tertiary);
  pointer-events: none;
}

.filter-pills {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-pill {
  padding: 8px 18px;
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-pill);
  background: var(--glass-bg);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  font-family: inherit;
  position: relative;
  overflow: hidden;
}

.filter-pill::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-color);
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.25s;
}

.filter-pill:hover {
  color: var(--accent-color);
  border-color: var(--accent-color);
  transform: translateY(-2px);
}

.filter-pill:hover::after {
  opacity: 0.06;
}

.filter-pill.active {
  background: var(--accent-gradient);
  color: white;
  border-color: transparent;
  box-shadow: 0 4px 15px var(--accent-glow);
}

/* Contador de resultados */
.courses-count {
  padding: 4px 20px 0;
  max-width: 1200px;
  margin: 0 auto;
  font-size: 0.82rem;
  color: var(--text-tertiary);
}

/* Grid de Cursos */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding: 16px 20px 60px;
  max-width: 1200px;
  margin: 0 auto;
}

/* Tarjeta de Curso */
.course-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  padding: 28px 24px 24px;
  display: flex;
  flex-direction: column;
  transition: all 0.35s cubic-bezier(0.05, 0.7, 0.1, 1);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  box-shadow: var(--glass-shadow);
}

.course-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--card-accent, var(--accent-gradient));
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.course-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.1), 0 4px 20px var(--accent-glow);
  border-color: var(--accent-color);
}

.course-card:hover::before {
  opacity: 1;
}

[data-theme="dark"] .course-card:hover {
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4), 0 4px 20px var(--accent-glow);
}

/* Icono del curso */
.course-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 16px;
  background: var(--secondary-container);
  border: 1px solid var(--glass-border);
  transition: transform var(--transition-fast);
}

.course-card:hover .course-icon {
  transform: scale(1.1) rotate(-5deg);
}

/* Badge de nivel */
.course-level {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 3px 10px;
  border-radius: var(--border-radius-pill);
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.course-level.principiante {
  background: rgba(56, 106, 32, 0.15);
  color: #386A20;
  border: 1px solid rgba(56, 106, 32, 0.25);
}

[data-theme="dark"] .course-level.principiante {
  background: rgba(168, 216, 140, 0.15);
  color: #A8D88C;
}

.course-level.intermedio {
  background: rgba(255, 159, 10, 0.15);
  color: #FF9F0A;
  border: 1px solid rgba(255, 159, 10, 0.25);
}

.course-level.avanzado {
  background: rgba(208, 0, 0, 0.15);
  color: #D00000;
  border: 1px solid rgba(208, 0, 0, 0.25);
}

/* Textos */
.course-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.course-description {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 16px;
  flex: 1;
}

/* Meta info */
.course-meta {
  display: flex;
  gap: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--glass-border);
  margin-bottom: 16px;
}

.course-meta-item {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.78rem;
  color: var(--text-tertiary);
}

.course-meta-item span:first-child {
  font-size: 0.9rem;
}

/* Botón Comenzar */
.course-start-btn {
  width: 100%;
  padding: 10px;
  border: none;
  border-radius: var(--border-radius-sm);
  background: var(--accent-gradient);
  color: white;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.2, 0, 0, 1);
  font-family: inherit;
  letter-spacing: -0.01em;
  position: relative;
  overflow: hidden;
}

.course-start-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: white;
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.2s;
}

.course-start-btn:hover {
  transform: scale(1.02);
  box-shadow: 0 4px 15px var(--accent-glow);
}

.course-start-btn:active {
  transform: scale(0.98);
}

.course-start-btn:active::after {
  opacity: 0.15;
}

/* Estado: En progreso */
.course-card.in-progress .course-start-btn {
  background: var(--glass-bg);
  border: 2px solid var(--accent-color);
  color: var(--accent-color);
}

.course-progress-bar {
  width: 100%;
  height: 4px;
  background: var(--glass-border);
  border-radius: 2px;
  margin-bottom: 12px;
  overflow: hidden;
}

.course-progress-fill {
  height: 100%;
  background: var(--accent-gradient);
  border-radius: 2px;
  transition: width 0.5s cubic-bezier(0.05, 0.7, 0.1, 1);
}

/* Card oculta por filtro */
.course-card.hidden-by-filter {
  display: none;
}

/* Sin resultados */
.no-results {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--text-tertiary);
}

.no-results-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

.no-results p {
  font-size: 1rem;
}

/* ============================================
           RESPONSIVE
           ============================================ */

@media (max-width: 1200px) {
  .courses-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 900px) {
  .courses-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .courses-hero h1 {
    font-size: 1.8rem;
  }
}

@media (max-width: 600px) {
  .courses-grid {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 12px 16px 60px;
  }

  .courses-hero {
    padding: 40px 16px 12px;
  }

  .courses-hero h1 {
    font-size: 1.5rem;
  }

  .courses-hero p {
    font-size: 0.92rem;
  }

  .courses-toolbar {
    padding: 12px 16px 4px;
  }

  .filter-pills {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
    scrollbar-width: none;
  }

  .filter-pills::-webkit-scrollbar {
    display: none;
  }

  .course-card {
    padding: 22px 20px 20px;
  }
}

/* Animación de entrada para las tarjetas */
@keyframes cardFadeIn {
  from {
    opacity: 0;
    transform: translateY(24px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.course-card {
  animation: cardFadeIn 0.5s cubic-bezier(0.05, 0.7, 0.1, 1) forwards;
  opacity: 0;
}

.course-card:nth-child(1) {
  animation-delay: 0.05s;
}

.course-card:nth-child(2) {
  animation-delay: 0.1s;
}

.course-card:nth-child(3) {
  animation-delay: 0.15s;
}

.course-card:nth-child(4) {
  animation-delay: 0.2s;
}

.course-card:nth-child(5) {
  animation-delay: 0.25s;
}

.course-card:nth-child(6) {
  animation-delay: 0.3s;
}

.course-card:nth-child(7) {
  animation-delay: 0.35s;
}

.course-card:nth-child(8) {
  animation-delay: 0.4s;
}

.course-card:nth-child(9) {
  animation-delay: 0.45s;
}

.course-card:nth-child(10) {
  animation-delay: 0.5s;
}

.course-card:nth-child(11) {
  animation-delay: 0.55s;
}

.course-card:nth-child(12) {
  animation-delay: 0.6s;
}

svg {
  display: block;
}

/* ============================================
           COURSE DETAILS - Estilos Específicos
           ============================================ */

.course-details-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px 60px;
}

/* Header del Curso */
.course-detail-header {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  padding: 40px 32px;
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 28px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--glass-shadow);
}

.course-detail-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent-gradient);
}

.course-detail-icon {
  width: 72px;
  height: 72px;
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.4rem;
  background: var(--secondary-container);
  border: 1px solid var(--glass-border);
  flex-shrink: 0;
  transition: transform 0.3s cubic-bezier(0.2, 0, 0, 1);
}

.course-detail-header:hover .course-detail-icon {
  transform: scale(1.05) rotate(-3deg);
}

.course-detail-info {
  flex: 1;
  min-width: 0;
}

.course-detail-title {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
  line-height: 1.2;
}

.course-detail-description {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.course-detail-meta {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.course-detail-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

.course-detail-meta-item span:first-child {
  font-size: 1rem;
}

.course-detail-level {
  padding: 4px 12px;
  border-radius: var(--border-radius-pill);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.course-detail-level.principiante {
  background: rgba(56, 106, 32, 0.15);
  color: #386A20;
  border: 1px solid rgba(56, 106, 32, 0.25);
}

[data-theme="dark"] .course-detail-level.principiante {
  background: rgba(168, 216, 140, 0.15);
  color: #A8D88C;
  border-color: rgba(168, 216, 140, 0.25);
}

.course-detail-level.intermedio {
  background: rgba(255, 159, 10, 0.15);
  color: #FF9F0A;
  border: 1px solid rgba(255, 159, 10, 0.25);
}

.course-detail-level.avanzado {
  background: rgba(208, 0, 0, 0.15);
  color: #D00000;
  border: 1px solid rgba(208, 0, 0, 0.25);
}

/* Botón Volver */
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-pill);
  background: var(--glass-bg);
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  font-family: inherit;
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
}

.back-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-color);
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.25s;
}

.back-btn:hover {
  color: var(--accent-color);
  border-color: var(--accent-color);
  transform: translateX(-4px);
}

.back-btn:hover::after {
  opacity: 0.06;
}

.back-btn svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

/* Sección de Lecciones */
.lessons-section-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.lessons-count {
  font-size: 0.82rem;
  color: var(--text-tertiary);
  margin-left: 8px;
  font-weight: 400;
}

/* Grid de Lecciones */
.lessons-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

/* Tarjeta de Lección */
.lesson-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: all 0.35s cubic-bezier(0.05, 0.7, 0.1, 1);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  box-shadow: var(--glass-shadow);
}

.lesson-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.lesson-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.1), 0 4px 20px var(--accent-glow);
  border-color: var(--accent-color);
}

.lesson-card:hover::before {
  opacity: 1;
}

[data-theme="dark"] .lesson-card:hover {
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4), 0 4px 20px var(--accent-glow);
}

/* Número de lección */
.lesson-number {
  width: 44px;
  height: 44px;
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--accent-color);
  background: var(--secondary-container);
  border: 1px solid var(--glass-border);
  margin-bottom: 16px;
  transition: transform var(--transition-fast);
}

.lesson-card:hover .lesson-number {
  transform: scale(1.1) rotate(-5deg);
}

/* Textos */
.lesson-title {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.lesson-description {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 16px;
  flex: 1;
}

/* Botón Comenzar Lección */
.lesson-start-btn {
  width: 100%;
  padding: 10px;
  border: none;
  border-radius: var(--border-radius-sm);
  background: var(--accent-gradient);
  color: white;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.2, 0, 0, 1);
  font-family: inherit;
  letter-spacing: -0.01em;
  position: relative;
  overflow: hidden;
}

.lesson-start-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: white;
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.2s;
}

.lesson-start-btn:hover {
  transform: scale(1.02);
  box-shadow: 0 4px 15px var(--accent-glow);
}

.lesson-start-btn:active {
  transform: scale(0.98);
}

.lesson-start-btn:active::after {
  opacity: 0.15;
}

/* Estados de carga y error */
.loading-state {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-tertiary);
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--glass-border);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.error-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.error-state-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

.error-state p {
  font-size: 1rem;
  margin-bottom: 8px;
}

.error-state small {
  color: var(--text-tertiary);
}

.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--text-tertiary);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

/* Animación de entrada */
@keyframes cardFadeIn {
  from {
    opacity: 0;
    transform: translateY(24px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.lesson-card {
  animation: cardFadeIn 0.5s cubic-bezier(0.05, 0.7, 0.1, 1) forwards;
  opacity: 0;
}

.lesson-card:nth-child(1) {
  animation-delay: 0.05s;
}

.lesson-card:nth-child(2) {
  animation-delay: 0.1s;
}

.lesson-card:nth-child(3) {
  animation-delay: 0.15s;
}

.lesson-card:nth-child(4) {
  animation-delay: 0.2s;
}

.lesson-card:nth-child(5) {
  animation-delay: 0.25s;
}

.lesson-card:nth-child(6) {
  animation-delay: 0.3s;
}

.lesson-card:nth-child(7) {
  animation-delay: 0.35s;
}

.lesson-card:nth-child(8) {
  animation-delay: 0.4s;
}

.lesson-card:nth-child(9) {
  animation-delay: 0.45s;
}

.lesson-card:nth-child(10) {
  animation-delay: 0.5s;
}

/* ============================================
           RESPONSIVE
           ============================================ */

@media (max-width: 1200px) {
  .lessons-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 900px) {
  .lessons-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .course-detail-header {
    flex-direction: column;
    text-align: center;
    padding: 32px 24px;
  }

  .course-detail-meta {
    justify-content: center;
  }

  .course-detail-title {
    font-size: 1.5rem;
  }
}

@media (max-width: 600px) {
  .lessons-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .course-details-container {
    padding: 20px 16px 60px;
  }

  .course-detail-header {
    padding: 24px 20px;
    gap: 16px;
  }

  .course-detail-icon {
    width: 56px;
    height: 56px;
    font-size: 2rem;
  }

  .course-detail-title {
    font-size: 1.3rem;
  }

  .lesson-card {
    padding: 20px;
  }
}

/* ============================================
   SUGGESTION BAR - Sugerencias Educativas
   ============================================ */

.suggestions-bar {
  position: relative;
  width: 100%;
  padding: 0 16px 12px;
  overflow-x: auto;
  overflow-y: hidden;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--glass-border) transparent;
  display: flex;
  gap: 12px;
  z-index: 5;
  min-height: 50px;
}

.suggestions-bar::-webkit-scrollbar {
  height: 4px;
}

.suggestions-bar::-webkit-scrollbar-track {
  background: transparent;
}

.suggestions-bar::-webkit-scrollbar-thumb {
  background: var(--glass-border);
  border-radius: 2px;
}

.suggestion-chip {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
  padding: 12px 20px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.05, 0.7, 0.1, 1);
  white-space: normal;
  flex-shrink: 0;
  font-family: inherit;
  line-height: 1.4;
  max-width: 320px;
  min-width: 180px;
  height: auto;
  overflow: visible;
  text-overflow: clip;
  position: relative;
  box-shadow: var(--glass-shadow);
}

.suggestion-chip::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-fast);
  border-radius: var(--border-radius-md) var(--border-radius-md) 0 0;
}

.suggestion-chip::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-color);
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.25s;
}

.suggestion-chip:hover {
  transform: translateY(-4px);
  border-color: var(--accent-color);
  box-shadow: 0 8px 24px var(--accent-glow);
  background: var(--message-user-bg);
}

.suggestion-chip:hover::before {
  opacity: 1;
}

.suggestion-chip:hover::after {
  opacity: 0.04;
}

.suggestion-chip:active {
  transform: translateY(-2px) scale(0.98);
}

.suggestion-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
  line-height: 1;
}

.suggestion-text {
  overflow: visible;
  text-overflow: clip;
  white-space: normal;
  word-wrap: break-word;
  line-height: 1.4;
}

.suggestions-empty {
  display: none;
}

/* Animación de entrada */
@keyframes chipSlideIn {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.95);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.suggestion-chip {
  animation: chipSlideIn 0.4s cubic-bezier(0.05, 0.7, 0.1, 1) forwards;
  opacity: 0;
}

.suggestion-chip:nth-child(1) {
  animation-delay: 0.05s;
}

.suggestion-chip:nth-child(2) {
  animation-delay: 0.1s;
}

.suggestion-chip:nth-child(3) {
  animation-delay: 0.15s;
}

.suggestion-chip:nth-child(4) {
  animation-delay: 0.2s;
}

.suggestion-chip:nth-child(5) {
  animation-delay: 0.25s;
}

.suggestion-chip:nth-child(6) {
  animation-delay: 0.3s;
}

/* Dark mode adjustments */
[data-theme="dark"] .suggestion-chip:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3), 0 2px 12px var(--accent-glow);
}

/* Responsive */
@media (max-width: 600px) {
  .suggestions-bar {
    padding: 0 12px 10px;
    gap: 10px;
  }

  .suggestion-chip {
    padding: 10px 16px;
    font-size: 0.85rem;
    max-width: 260px;
    min-width: 140px;
  }
}

/* En styles.css */

.conv-section-title {
  padding: 12px 16px 8px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.conv-separator hr {
  margin: 8px 0;
  border: none;
  border-top: 1px solid var(--glass-border);
}

.conv-course-item {
  background: linear-gradient(135deg, rgba(103, 80, 164, 0.08), rgba(125, 82, 96, 0.04));
  border-left: 3px solid var(--accent-color);
}

.conv-course-item.active {
  background: linear-gradient(135deg, rgba(103, 80, 164, 0.16), rgba(125, 82, 96, 0.08));
  border-left-color: var(--accent-color);
}

/* Estilos para secciones desplegables */
.collapsible-section {
  margin-bottom: 1rem;
}

.collapsible-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  padding: 0.5rem 0;
  user-select: none;
  transition: color 0.2s ease;
}

.collapsible-header:hover {
  color: var(--accent-color);
}

.collapsible-header h4 {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.chevron-icon {
  transition: transform 0.3s cubic-bezier(0.05, 0.7, 0.1, 1);
  fill: currentColor;
}

/* Contenido colapsado por defecto */
.collapsible-content {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 0.35s cubic-bezier(0.05, 0.7, 0.1, 1), opacity 0.3s ease;
}

/* Estado expandido — sección principal */
.collapsible-section.active>.collapsible-content {
  max-height: 2000px;
  opacity: 1;
  margin-top: 0.5rem;
}

.collapsible-section.active>.collapsible-header .chevron-icon {
  transform: rotate(180deg);
}

/* Estado expandido — secciones anidadas */
.nested-collapsible.active>.collapsible-content {
  max-height: 2000px;
  opacity: 1;
  margin-top: 0.25rem;
}

.nested-collapsible.active>.collapsible-header .chevron-icon {
  transform: rotate(180deg);
}

/* Opcional: Asegurar que Navegación y Conversaciones sigan visibles siempre */
.sidebar-section:not(.collapsible-section) {
  margin-bottom: 1.5rem;
}

/* Estilos específicos para la página de categorías */
.categories-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  padding-top: 80px;
}

.categories-hero {
  text-align: center;
  margin-bottom: 40px;
  padding: 40px 20px;
  background: var(--secondary-container);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

.categories-hero h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.categories-hero p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* Barra de búsqueda */
.category-search-bar {
  max-width: 600px;
  margin: 0 auto 40px;
  position: relative;
}

.category-search-bar input {
  width: 100%;
  padding: 16px 20px 16px 50px;
  border-radius: var(--border-radius-pill);
  border: 2px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all 0.3s cubic-bezier(0.05, 0.7, 0.1, 1);
}

.category-search-bar input:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 2px 12px var(--accent-glow);
}

.category-search-icon {
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  width: 20px;
  height: 20px;
}

/* Grid de Categorías */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}

.category-card {
  background: var(--glass-bg);
  border-radius: var(--border-radius-lg);
  padding: 24px;
  border: 1px solid var(--glass-border);
  transition: all 0.3s cubic-bezier(0.05, 0.7, 0.1, 1);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  box-shadow: var(--glass-shadow);
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--card-accent, var(--accent-gradient));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.category-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-color);
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.25s;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1), 0 4px 16px var(--accent-glow);
  border-color: var(--accent-color);
}

.category-card:hover::before {
  opacity: 1;
}

.category-card:hover::after {
  opacity: 0.03;
}

.category-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  background: var(--secondary-container);
  width: 70px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--glass-border);
  transition: transform 0.3s cubic-bezier(0.2, 0, 0, 1);
}

.category-card:hover .category-icon {
  transform: scale(1.08) rotate(-3deg);
}

.category-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.category-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.5;
  flex-grow: 1;
}

.category-stats {
  display: flex;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-tertiary);
  margin-top: auto;
}

.category-stat-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Estado vacío */
.no-categories {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-tertiary);
  grid-column: 1 / -1;
}

.no-categories-icon {
  font-size: 4rem;
  margin-bottom: 16px;
  display: block;
}

/* Responsive */
@media (max-width: 768px) {
  .categories-hero h1 {
    font-size: 2rem;
  }

  .categories-grid {
    grid-template-columns: 1fr;
  }
}

@keyframes pulse {
  0% {
    transform: scale(1);
    opacity: 1;
  }

  50% {
    transform: scale(1.1);
    opacity: 0.8;
  }

  100% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Ocultar el botón de micrófono antiguo si aún existe en el HTML */
#voice-btn {
  display: none !important;
}

/* Estado de grabación en el botón de envío */
.send-button.recording {
  background-color: #ff4757 !important;
  /* Rojo intenso */
  animation: pulse-red 1.5s infinite;
}

@keyframes pulse-red {
  0% {
    transform: scale(1);
    opacity: 1;
  }

  50% {
    transform: scale(1.05);
    opacity: 0.8;
  }

  100% {
    transform: scale(1);
    opacity: 1;
  }
}


/* Audio del usuario (derecha) */
.message.user .audio-player-container {
  background: var(--user-message-bg, #dcf8c6);
  border-radius: 12px;
  padding: 12px;
  max-width: 300px;
}

.message.user .audio-player-container .audio-player-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 0.85rem;
  color: #666;
}

.message.user .custom-audio-player {
  width: 100%;
  height: 36px;
}

.message.user .audio-duration {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: #666;
  margin-top: 6px;
}

/* Ajuste para audio de IA (izquierda) */
.message.assistant .audio-player-container {
  background: var(--assistant-message-bg, #f1f0f0);
  border-radius: 12px;
  padding: 12px;
  max-width: 300px;
}

/* --- Indicador de Música --- */
.music-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 12px 20px;
}

.music-note {
  font-size: 28px;
  animation: musicFloat 1.5s ease-in-out infinite;
}

.music-wave {
  width: 4px;
  height: 20px;
  background: var(--accent-color, #6c5ce7);
  border-radius: 2px;
  animation: musicWave 1s ease-in-out infinite;
}

.music-wave:nth-child(2) {
  animation-delay: 0.2s;
  height: 28px;
}

.music-wave:nth-child(3) {
  animation-delay: 0.4s;
  height: 24px;
}

@keyframes musicFloat {

  0%,
  100% {
    transform: translateY(0) rotate(-10deg);
  }

  50% {
    transform: translateY(-8px) rotate(10deg);
  }
}

@keyframes musicWave {

  0%,
  100% {
    transform: scaleY(1);
    opacity: 0.5;
  }

  50% {
    transform: scaleY(1.5);
    opacity: 1;
  }
}

/* Asegurar que los contenedores estén ocultos por defecto */
.typing-indicator.hidden,
.recording-indicator.hidden,
.music-indicator.hidden {
  display: none;
}

.model-selector {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 0.9rem;
  cursor: pointer;
  outline: none;
  transition: all 0.2s;
  margin-right: 10px;
}

.model-selector:hover {
  border-color: var(--accent-color);
}

.model-selector:focus {
  box-shadow: 0 0 0 2px rgba(100, 149, 237, 0.3);
}

/* --- ESTILOS DEL CONTENEDOR DE VIDEO --- */
.video-container {
  width: 100%;
  max-width: 100%;
  margin: 12px 0;
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg-secondary, #f5f5f5);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.video-thumbnail-wrapper {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  /* Aspect ratio 16:9 */
  background: #000;
  cursor: pointer;
  border-radius: 12px;
  overflow: hidden;
}

.video-thumbnail {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.video-thumbnail-wrapper:hover .video-thumbnail {
  transform: scale(1.05);
}

.video-play-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0, 0, 0, 0.6);
  border: none;
  border-radius: 50%;
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 10;
}

.video-play-overlay:hover {
  background: rgba(0, 0, 0, 0.8);
  transform: translate(-50%, -50%) scale(1.1);
}

.video-player {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
}

.video-player.hidden {
  display: none;
}

.video-info {
  padding: 12px 16px;
  background: var(--bg-secondary, #f5f5f5);
  border-top: 1px solid var(--border-color, #e0e0e0);
}

.video-badge {
  display: inline-block;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.video-prompt {
  display: block;
  color: var(--text-secondary, #666);
  font-size: 0.85rem;
  line-height: 1.4;
  margin-top: 4px;
}

.video-actions {
  padding: 8px 16px;
  display: flex;
  justify-content: flex-end;
  background: var(--bg-secondary, #f5f5f5);
}

.video-download-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: transparent;
  border: 1px solid var(--border-color, #ddd);
  border-radius: 6px;
  color: var(--text-primary, #333);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.video-download-btn:hover {
  background: var(--accent-color, #667eea);
  color: white;
  border-color: var(--accent-color, #667eea);
}

/* --- ANIMACIÓN DEL SPINNER DE VIDEO --- */
@keyframes videoSpin {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

.video-loader {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 24px;
  min-height: 120px;
}

.video-icon {
  color: var(--accent-color, #667eea);
  animation: pulse 2s ease-in-out infinite;
}

.video-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border-color, #e0e0e0);
  border-top-color: var(--accent-color, #667eea);
  border-radius: 50%;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.6;
  }
}

/* --- RESPONSIVE: Ajustes para móviles --- */
@media (max-width: 768px) {
  .video-container {
    margin: 8px 0;
    border-radius: 8px;
  }

  .video-thumbnail-wrapper {
    border-radius: 8px;
  }

  .video-play-overlay {
    width: 48px;
    height: 48px;
  }

  .video-play-overlay svg {
    width: 32px;
    height: 32px;
  }

  .video-info {
    padding: 8px 12px;
  }

  .video-badge {
    font-size: 0.7rem;
    padding: 3px 8px;
  }

  .video-prompt {
    font-size: 0.8rem;
  }

  .video-download-btn {
    font-size: 0.8rem;
    padding: 4px 10px;
  }
}

.logout-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: calc(100% - 32px);
  /* Ajuste para márgenes */
  margin: 16px auto;
  padding: 10px 16px;
  background: transparent;
  border: 1px solid var(--border-color, #ddd);
  border-radius: 8px;
  color: var(--text-color, #333);
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.9rem;
  font-weight: 500;
}

.logout-btn:hover {
  background: var(--danger-color, #ffebee);
  border-color: var(--danger-color, #ef5350);
  color: var(--danger-color, #d32f2f);
}

/* Ajuste para modo oscuro si usas variables */
[data-theme="dark"] .logout-btn {
  border-color: #444;
  color: #fff;
}

[data-theme="dark"] .logout-btn:hover {
  background: rgba(211, 47, 47, 0.15);
  border-color: #d32f2f;
  color: #ff8a80;
}

.btn-secondary {
  background: var(--secondary-color, #6c757d);
  color: white;
  border: none;
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.2s;
}

.btn-secondary:hover {
  background: #5a6268;
}

/* ============================================
   SIDEBAR COLAPSABLE (DOCK) - ESCRITORIO
   ============================================ */

/* Botón de colapsar/expandir en el header del sidebar */
.sidebar-collapse-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-collapse-btn:hover {
  background: var(--message-user-bg);
  color: var(--accent-color);
}

.sidebar-collapse-btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
  transition: transform var(--transition-fast);
}

/* Estado colapsado del sidebar en PC */
.mobile-sidebar.collapsed {
  width: 72px !important;
  /* Ancho reducido para solo iconos */
}

.mobile-sidebar.collapsed .sidebar-header h3,
.mobile-sidebar.collapsed .sidebar-section h4,
.mobile-sidebar.collapsed .sidebar-links a span:not(.icon-only),
.mobile-sidebar.collapsed .sidebar-social,
.mobile-sidebar.collapsed .sidebar-footer,
.mobile-sidebar.collapsed .logout-btn span,
.mobile-sidebar.collapsed .collapsible-content,
.mobile-sidebar.collapsed .conversations-list,
.mobile-sidebar.collapsed .conversations-header h4 {
  display: none !important;
}

.mobile-sidebar.collapsed .sidebar-links a {
  padding: 10px 0;
  justify-content: center;
  text-align: center;
}

.mobile-sidebar.collapsed .sidebar-links a::before {
  display: none;
}

.mobile-sidebar.collapsed .sidebar-links a {
  border-left: none !important;
}

.mobile-sidebar.collapsed .sidebar-links a:hover {
  background: var(--message-user-bg);
}

.mobile-sidebar.collapsed .conv-item {
  justify-content: center;
  padding: 10px 0;
}

.mobile-sidebar.collapsed .conv-item-icon {
  margin-right: 0;
}

.mobile-sidebar.collapsed .conv-item-info,
.mobile-sidebar.collapsed .conv-item-actions {
  display: none;
}

/* Cuando está colapsado, el contenido principal no tiene margen */
.mobile-sidebar.collapsed~.chat-container,
.mobile-sidebar.collapsed~.header,
.mobile-sidebar.collapsed~footer.footer {
  margin-left: 72px !important;
  /* Margen reducido solo para el dock */
}

/* Tooltip simple al pasar el mouse sobre iconos colapsados */
.mobile-sidebar.collapsed .sidebar-links a,
.mobile-sidebar.collapsed .conv-item,
.mobile-sidebar.collapsed .sidebar-collapse-btn {
  position: relative;
}

.mobile-sidebar.collapsed .sidebar-links a::after,
.mobile-sidebar.collapsed .conv-item::after {
  content: attr(data-tooltip);
  position: absolute;
  left: 100%;
  top: 50%;
  transform: translateY(-50%);
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
  margin-left: 8px;
  z-index: 1000;
}

.mobile-sidebar.collapsed .sidebar-links a:hover::after,
.mobile-sidebar.collapsed .conv-item:hover::after {
  opacity: 1;
}

/* Ajuste del botón de colapsar en header */
.mobile-sidebar.collapsed .sidebar-header {
  justify-content: center;
  padding: 16px 0;
}

.mobile-sidebar.collapsed .close-menu {
  display: none;
}

/* Ajustes responsive para que en móvil no se aplique el colapso */
@media (max-width: 768px) {
  .mobile-sidebar {
    /* FORZAMOS que esté oculto inicialmente */
    transform: translateX(-100%) !important;
    position: fixed !important;
    top: 0;
    left: 0;
    width: 280px;
    height: 100vh;
    z-index: 2000 !important;
    /* Por encima de todo */
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
    /* Aseguramos que no interfiera con el contenido */
    pointer-events: none;
  }

  .mobile-sidebar.active {
    transform: translateX(0) !important;
    pointer-events: auto !important;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.3) !important;
  }


  /* El contenido principal NO debe tener margen en móvil */
  .chat-container,
  .header,
  footer.footer {
    margin-left: 0 !important;
  }

  .mobile-sidebar.collapsed {
    width: 280px !important;
    /* Restaurar ancho completo en móvil */
  }

  .mobile-sidebar.collapsed .sidebar-header h3,
  .mobile-sidebar.collapsed .sidebar-section h4,
  .mobile-sidebar.collapsed .sidebar-links a span,
  .mobile-sidebar.collapsed .sidebar-social,
  .mobile-sidebar.collapsed .sidebar-footer,
  .mobile-sidebar.collapsed .logout-btn span,
  .mobile-sidebar.collapsed .collapsible-content,
  .mobile-sidebar.collapsed .conversations-list,
  .mobile-sidebar.collapsed .conversations-header h4 {
    display: block !important;
  }

  .mobile-sidebar.collapsed .sidebar-links a {
    padding: 10px 12px;
    justify-content: flex-start;
    text-align: left;
  }

  .mobile-sidebar.collapsed~.chat-container,
  .mobile-sidebar.collapsed~.header,
  .mobile-sidebar.collapsed~footer.footer {
    margin-left: 0 !important;
  }

  .sidebar-collapse-btn {
    display: none !important;
    /* Ocultar botón de colapsar en móvil */
  }
}

/* ============================================
   CORRECCIÓN: BOTÓN CERRAR SESIÓN
   ============================================ */

.logout-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: calc(100% - 32px);
  margin: 16px auto;
  padding: 12px 16px;
  background: transparent;
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.9rem;
  font-weight: 500;
  position: relative;
  overflow: hidden;
}

.logout-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-color);
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.25s;
  pointer-events: none;
}

.logout-btn:hover {
  background: rgba(208, 0, 0, 0.1);
  border-color: #ef5350;
  color: #d32f2f;
}

.logout-btn:hover::after {
  opacity: 0.06;
}

.logout-btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
  flex-shrink: 0;
  display: block;
}

/* Modo oscuro */
[data-theme="dark"] .logout-btn {
  border-color: #444;
  color: #ccc;
}

[data-theme="dark"] .logout-btn:hover {
  background: rgba(211, 47, 47, 0.15);
  border-color: #d32f2f;
  color: #ff8a80;
}

/* ============================================
   CORRECCIÓN: LOGO EN SIDEBAR
   ============================================ */

.sidebar-logo {
  text-align: center;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--glass-border);
  padding: 16px 20px;
}

.sidebar-logo img {
  max-width: 80px;
  /* Reducido de 110px a 80px */
  max-height: 80px;
  width: auto;
  height: auto;
  object-fit: contain;
  display: inline-block;
}

/* En sidebar colapsado, logo más pequeño */
.mobile-sidebar.collapsed .sidebar-logo {
  padding: 12px 0;
}

.mobile-sidebar.collapsed .sidebar-logo img {
  max-width: 40px;
  max-height: 40px;
}

/* ============================================
   AJUSTE: SECCIÓN REDES SOCIALES
   ============================================ */

.sidebar-social {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  padding: 8px 0;
}

.sidebar-social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius-md);
  background: var(--secondary-container);
  border: 1px solid var(--glass-border);
  transition: all 0.25s cubic-bezier(0.2, 0, 0, 1);
}

.sidebar-social a:hover {
  background: var(--accent-gradient);
  border-color: transparent;
  transform: scale(1.15) rotate(-5deg);
  box-shadow: 0 4px 12px var(--accent-glow);
}

.sidebar-social img {
  width: 20px;
  height: 20px;
  object-fit: contain;
  display: block;
}

/* En sidebar colapsado, redes sociales más compactas */
.mobile-sidebar.collapsed .sidebar-social {
  gap: 6px;
}

.mobile-sidebar.collapsed .sidebar-social a {
  width: 32px;
  height: 32px;
}

.mobile-sidebar.collapsed .sidebar-social img {
  width: 16px;
  height: 16px;
}

/* ============================================
   RESPONSIVE: MÓVIL
   ============================================ */

@media (max-width: 768px) {
  .sidebar-logo img {
    max-width: 100px;
    max-height: 100px;
  }

  .logout-btn {
    width: calc(100% - 24px);
    padding: 10px 14px;
    font-size: 0.85rem;
  }

  .logout-btn svg {
    width: 16px;
    height: 16px;
  }

  .sidebar-social a {
    width: 34px;
    height: 34px;
  }

  .sidebar-social img {
    width: 18px;
    height: 18px;
  }
}

/* ============================================
   LOGO SIDEBAR - TAMAÑO REDUCIDO
   ============================================ */

.sidebar-logo {
  text-align: center;
  margin-top: 12px;
  /* Reducido margen superior */
  padding-top: 12px;
  border-top: 1px solid var(--glass-border);
  padding-bottom: 12px;
}

.sidebar-logo img {
  max-width: 50px !important;
  /* Forzado a 50px */
  max-height: 50px !important;
  width: auto;
  height: auto;
  object-fit: contain;
  display: inline-block;
  vertical-align: middle;
}

/* En sidebar colapsado, logo aún más pequeño */
.mobile-sidebar.collapsed .sidebar-logo {
  padding: 8px 0;
  margin-top: 8px;
}

.mobile-sidebar.collapsed .sidebar-logo img {
  max-width: 32px !important;
  max-height: 32px !important;
}

/* ============================================
   BOTÓN CERRAR SESIÓN - AJUSTE FINAL
   ============================================ */

.logout-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: calc(100% - 24px);
  margin: 12px auto;
  padding: 10px 14px;
  background: transparent;
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.85rem;
  font-weight: 500;
  position: relative;
  overflow: hidden;
}

.logout-btn svg {
  width: 16px !important;
  height: 16px !important;
  fill: currentColor !important;
  flex-shrink: 0;
  display: block !important;
}

.logout-btn:hover {
  background: rgba(208, 0, 0, 0.1);
  border-color: #ef5350;
  color: #d32f2f;
}

[data-theme="dark"] .logout-btn:hover {
  background: rgba(211, 47, 47, 0.15);
  border-color: #d32f2f;
  color: #ff8a80;
}

/* ============================================
   CLASSROOM DETAIL - Estilos Específicos
   ============================================ */

.detail-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

/* Header de la Tarea */
.task-header-card {
  background: var(--surface-color);
  border-radius: var(--border-radius-lg);
  padding: 32px;
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-subtle);
  border: 1px solid rgba(0, 0, 0, 0.03);
  transition: all var(--transition-smooth);
}

.task-header-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.task-header-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--border-radius-md);
  background: var(--surface-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  flex-shrink: 0;
}

.task-header-content {
  flex: 1;
}

.task-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.task-course {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* Grid de Metadatos */
.task-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.meta-item {
  background: var(--surface-color);
  border-radius: var(--border-radius-md);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow-subtle);
  border: 1px solid rgba(0, 0, 0, 0.03);
  transition: all var(--transition-smooth);
}

.meta-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.meta-icon {
  font-size: 1.8rem;
  flex-shrink: 0;
}

.meta-content {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.meta-label {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.meta-value {
  font-size: 1rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* Badges de Estado */
.status-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--border-radius-pill);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.status-pending {
  background: rgba(255, 159, 10, 0.15);
  color: #FF9F0A;
}

.status-submitted {
  background: rgba(103, 80, 164, 0.15);
  color: var(--accent-primary);
}

.status-evaluated {
  background: rgba(56, 106, 32, 0.15);
  color: #386A20;
}

[data-theme="dark"] .status-pending {
  background: rgba(255, 159, 10, 0.2);
  color: #FFB74D;
}

[data-theme="dark"] .status-evaluated {
  background: rgba(56, 106, 32, 0.2);
  color: #A8D88C;
}

/* Sección de Descripción */
.task-description-card {
  margin-bottom: 24px;
}

.section-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.task-desc-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

/* Área de Upload */
.upload-area {
  background: var(--surface-hover);
  border: 2px dashed var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: 40px 24px;
  text-align: center;
  margin-bottom: 20px;
  transition: all var(--transition-smooth);
}

.upload-area.drag-over {
  border-color: var(--accent-primary);
  background: var(--accent-glow);
  transform: scale(1.01);
}

.upload-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

.upload-text {
  font-size: 1rem;
  color: var(--text-primary);
  font-weight: 500;
  margin-bottom: 8px;
}

.upload-hint {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  margin-bottom: 16px;
}

.file-input-wrapper {
  position: relative;
  display: inline-block;
  margin: 16px 0;
}

.file-input-wrapper input[type="file"] {
  position: absolute;
  left: 0;
  top: 0;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.file-list {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.file-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--surface-color);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  padding: 6px 12px;
  font-size: 0.85rem;
  color: var(--text-primary);
}

.file-chip .remove-file {
  cursor: pointer;
  color: var(--text-tertiary);
  font-size: 1rem;
  padding: 0 4px;
}

.file-chip .remove-file:hover {
  color: #D00000;
}

/* Textarea de Respuesta */
.response-textarea {
  margin-bottom: 20px;
}

.response-textarea textarea {
  width: 100%;
  padding: 16px;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--glass-border);
  background: var(--surface-color);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  resize: vertical;
  min-height: 120px;
  transition: all 0.2s ease;
}

.response-textarea textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Acciones de Submit */
.submit-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--glass-border);
}

/* Estado de Mensaje */
.status-message {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--border-radius-sm);
  display: none;
  font-size: 0.9rem;
}

.status-message.show {
  display: block;
  animation: fadeIn 0.3s ease;
}

.status-message.success {
  background: rgba(56, 106, 32, 0.1);
  color: #386A20;
  border-left: 3px solid #386A20;
}

[data-theme="dark"] .status-message.success {
  color: #A8D88C;
  border-left-color: #A8D88C;
}

.status-message.error {
  background: rgba(208, 0, 0, 0.1);
  color: #D00000;
  border-left: 3px solid #D00000;
}

/* Sección de Evaluación */
.evaluation-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.form-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.evaluation-actions {
  display: flex;
  justify-content: flex-end;
  padding-top: 12px;
}

/* Sección de Feedback */
.feedback-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.feedback-icon {
  font-size: 2rem;
}

.feedback-content {
  background: var(--surface-hover);
  border-radius: var(--border-radius-md);
  padding: 24px;
  margin-bottom: 16px;
}

.feedback-score {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--glass-border);
}

.score-label {
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

.score-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent-primary);
}

.score-max {
  font-size: 1.2rem;
  color: var(--text-secondary);
}

.feedback-comment h3 {
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.feedback-comment p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* Caja de Disputa */
.dispute-box {
  background: rgba(255, 159, 10, 0.08);
  border: 1px solid rgba(255, 159, 10, 0.2);
  border-radius: var(--border-radius-md);
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.dispute-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0;
  flex: 1;
}

/* Estado de Carga y Error */
.loading-state {
  text-align: center;
  padding: 80px 20px;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--glass-border);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.error-state {
  text-align: center;
  padding: 40px 20px;
}

.error-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

.error-state h3 {
  font-size: 1.2rem;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.error-state p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

/* Responsive */
@media (max-width: 768px) {
  .detail-container {
    padding: 16px 12px 60px;
  }

  .task-header-card {
    flex-direction: column;
    text-align: center;
    padding: 24px;
    gap: 16px;
  }

  .task-meta-grid {
    grid-template-columns: 1fr;
  }

  .submit-actions {
    flex-direction: column;
  }

  .submit-actions .btn {
    width: 100%;
  }

  .dispute-box {
    flex-direction: column;
    text-align: center;
  }

  .score-value {
    font-size: 2rem;
  }
}

/* Animación de Entrada */
@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.animate-enter {
  animation: fadeInUp 0.5s var(--ease-out-expo) forwards;
  opacity: 0;
}

.animate-enter:nth-child(1) {
  animation-delay: 0.05s;
}

.animate-enter:nth-child(2) {
  animation-delay: 0.1s;
}

.animate-enter:nth-child(3) {
  animation-delay: 0.15s;
}

.animate-enter:nth-child(4) {
  animation-delay: 0.2s;
}

.animate-enter:nth-child(5) {
  animation-delay: 0.25s;
}

.animate-enter:nth-child(6) {
  animation-delay: 0.3s;
}

.btn-learn {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  /* Un tono diferente al primario */
  color: white;
  padding: 8px 16px;
  border-radius: 6px;
  text-decoration: none;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.btn-learn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(118, 75, 162, 0.4);
}

/* ============================================
   INVENTARIO - Estilos Completos (Continuación)
   ============================================ */

/* Botón Primario (Continuación) */
.btn-primary {
  background: var(--accent-gradient);
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: var(--border-radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.2, 0, 0, 1);
  box-shadow: 0 2px 8px var(--accent-glow);
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: white;
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.2s;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px var(--accent-glow);
}

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

.btn-primary:active::after {
  opacity: 0.15;
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Botón Secundario */
.btn-secondary {
  background: var(--glass-bg);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  padding: 12px 24px;
  border-radius: var(--border-radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.2, 0, 0, 1);
}

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

/* Estadísticas Rápidas */
.inventory-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding: 20px;
  max-width: 1200px;
  margin: 0 auto 20px;
}

.stat-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--glass-shadow);
  transition: all var(--transition-fast);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.stat-icon {
  font-size: 2rem;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--secondary-container);
  border-radius: var(--border-radius-md);
  flex-shrink: 0;
}

.stat-content {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.stat-value.warning {
  color: #FF9F0A;
}

[data-theme="dark"] .stat-value.warning {
  color: #FFB74D;
}

/* Filtros de Stock */
#stock-filter {
  margin-left: auto;
  display: flex;
  gap: 8px;
}

/* Tags de IA */
.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 8px 0;
}

.tag-chip {
  background: var(--secondary-container);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-pill);
  padding: 3px 10px;
  font-size: 0.7rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: all 0.2s;
}

.tag-chip:hover {
  background: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

/* Barra de Demanda */
.product-demand {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 10px 0;
  font-size: 0.8rem;
  padding: 8px;
  background: rgba(0, 0, 0, 0.02);
  border-radius: var(--border-radius-sm);
}

[data-theme="dark"] .product-demand {
  background: rgba(255, 255, 255, 0.02);
}

.demand-label {
  color: var(--text-tertiary);
  font-weight: 600;
  min-width: 50px;
}

.demand-bar {
  flex: 1;
  height: 6px;
  background: var(--glass-border);
  border-radius: 3px;
  overflow: hidden;
}

.demand-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.5s cubic-bezier(0.05, 0.7, 0.1, 1);
}

.demand-score {
  font-weight: 700;
  min-width: 40px;
  text-align: right;
  font-size: 0.85rem;
}

/* Botón Ver Detalles */
.product-actions {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--glass-border);
}

.btn-view-details {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  background: var(--glass-bg);
  color: var(--text-primary);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.2, 0, 0, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.btn-view-details:hover {
  background: var(--accent-gradient);
  color: white;
  border-color: transparent;
  transform: translateY(-1px);
}

/* Foto del Producto en Tarjeta */
.product-photo {
  width: 100%;
  height: 140px;
  background-size: cover;
  background-position: center;
  border-radius: var(--border-radius-md);
  margin-bottom: 12px;
  position: relative;
  overflow: hidden;
}

.product-photo::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 60%, rgba(0, 0, 0, 0.3));
}

/* ============================================
   MODAL FLOTANTE CON ANIMACIÓN
   ============================================ */

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2000;
  display: flex;
  align-items: center;
  /* Centrado vertical */
  justify-content: center;
  /* Centrado horizontal */
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  backdrop-filter: blur(8px);
  /* Desenfoque del fondo */
  background: rgba(0, 0, 0, 0.4);
  /* Fondo oscuro semitransparente */
}

.modal:not(.hidden) {
  opacity: 1;
  visibility: visible;
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  /* El fondo se maneja en el .modal padre para el blur */
}

.modal-content {
  position: relative;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  padding: 32px;
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);

  /* Animación de entrada: Slide Up + Fade In */
  transform: translateY(50px) scale(0.95);
  opacity: 0;
  transition: transform 0.4s cubic-bezier(0.19, 1, 0.22, 1), opacity 0.3s ease;
}

/* Estado visible del modal */
.modal:not(.hidden) .modal-content {
  transform: translateY(0) scale(1);
  opacity: 1;
}

/* Animación suave al hacer scroll dentro del modal */
.modal-content::-webkit-scrollbar {
  width: 8px;
}

.modal-content::-webkit-scrollbar-track {
  background: transparent;
}

.modal-content::-webkit-scrollbar-thumb {
  background: var(--glass-border);
  border-radius: 4px;
}

.modal-header {
  margin-bottom: 24px;
  text-align: center;
}

.modal-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 8px 0;
}

.modal-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0;
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: transparent;
  border: none;
  font-size: 1.8rem;
  color: var(--text-secondary);
  cursor: pointer;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all var(--transition-fast);
  z-index: 10;
}

.modal-close:hover {
  background: var(--message-user-bg);
  color: var(--text-primary);
  transform: rotate(90deg);
}

/* Responsive para móviles */
@media (max-width: 768px) {
  .modal-content {
    padding: 24px 20px;
    width: 95%;
    max-height: 85vh;
  }

  .modal-header h2 {
    font-size: 1.3rem;
  }
}


/* ============================================
   FORMULARIOS Y ZONA DE CARGA
   ============================================ */

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px var(--accent-glow);
  background: var(--glass-bg);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
  line-height: 1.5;
}

/* Zona de Carga de Archivo */
.upload-zone {
  background: var(--surface-hover);
  border: 2px dashed var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: 40px 24px;
  text-align: center;
  margin-bottom: 20px;
  transition: all var(--transition-fast);
  cursor: pointer;
  position: relative;
}

.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--accent-color);
  background: var(--accent-glow);
  transform: scale(1.01);
}

.upload-icon {
  font-size: 3rem;
  margin-bottom: 12px;
  display: block;
}

.upload-text {
  font-size: 1rem;
  color: var(--text-primary);
  font-weight: 500;
  margin-bottom: 8px;
}

.upload-hint {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  margin-bottom: 0;
}

/* ============================================
   ESTADO DE PROCESAMIENTO IA
   ============================================ */

.ai-status {
  background: var(--secondary-container);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: 16px;
  margin: 20px 0;
  display: flex;
  align-items: center;
  gap: 16px;
  animation: fadeIn 0.3s ease;
}

.ai-status.hidden {
  display: none;
}

.ai-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--glass-border);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}

.ai-text {
  flex: 1;
}

.ai-text strong {
  display: block;
  margin-bottom: 4px;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.ai-text p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.4;
}

/* ============================================
   ESTADOS DE MENSAJE Y ERROR
   ============================================ */

.status-message {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--border-radius-sm);
  display: none;
  font-size: 0.9rem;
  animation: slideDown 0.3s ease;
}

.status-message.show {
  display: block;
}

.status-message.success {
  background: rgba(56, 106, 32, 0.1);
  color: #386A20;
  border-left: 3px solid #386A20;
}

[data-theme="dark"] .status-message.success {
  color: #A8D88C;
  border-left-color: #A8D88C;
}

.status-message.error {
  background: rgba(208, 0, 0, 0.1);
  color: #D00000;
  border-left: 3px solid #D00000;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   DETALLES DEL PRODUCTO (MODAL GRANDE)
   ============================================ */

.detail-header {
  display: flex;
  gap: 24px;
  margin-bottom: 24px;
  align-items: flex-start;
}

.detail-photo {
  flex-shrink: 0;
  width: 180px;
  height: 180px;
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--glass-shadow);
}

.detail-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.detail-info {
  flex: 1;
}

.detail-info h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 8px 0;
  line-height: 1.2;
}

.detail-sku {
  display: block;
  font-size: 0.85rem;
  color: var(--text-tertiary);
  margin-bottom: 12px;
  font-family: monospace;
}

.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.meta-item {
  background: var(--secondary-container);
  padding: 6px 12px;
  border-radius: var(--border-radius-pill);
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.detail-section {
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--glass-border);
}

.detail-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.detail-section h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 12px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.detail-section p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* Tarjeta de Predicción */
.prediction-card {
  padding: 16px;
  border-radius: var(--border-radius-md);
  border-left: 4px solid;
  background: var(--bg-primary);
}

.prediction-card.warning {
  border-left-color: #FF9F0A;
  background: rgba(255, 159, 10, 0.08);
}

.prediction-card.info {
  border-left-color: #6750A4;
  background: rgba(103, 80, 164, 0.08);
}

.prediction-card.neutral {
  border-left-color: #386A20;
  background: rgba(56, 106, 32, 0.08);
}

.prediction-score {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: block;
}

.prediction-card p {
  margin: 0 0 8px 0;
  font-size: 0.95rem;
}

.restock-date {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  margin-top: 8px;
  font-style: italic;
}

/* Grid de Información */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 16px;
}

.info-item {
  background: var(--bg-primary);
  padding: 12px;
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--glass-border);
}

.info-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
  font-weight: 600;
}

.info-value {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* Botones del Modal */
.detail-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--glass-border);
}

/* ============================================
   ESTADOS DE CARGA Y ERROR GENERAL
   ============================================ */

.loading-state,
.error-state {
  text-align: center;
  padding: 60px 20px;
  grid-column: 1 / -1;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--glass-border);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.error-icon {
  font-size: 3rem;
  margin-bottom: 12px;
  display: block;
}

.error-state h3 {
  font-size: 1.2rem;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.error-state p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
  .inventory-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .inventory-stats {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .stat-card {
    padding: 16px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .detail-header {
    flex-direction: column;
    text-align: center;
  }

  .detail-photo {
    width: 100%;
    height: 200px;
    margin-bottom: 16px;
  }

  .detail-meta {
    justify-content: center;
  }

  .modal-content {
    padding: 24px 16px;
    width: 95%;
  }

  .modal-large {
    max-width: 95%;
  }

  .detail-actions {
    flex-direction: column-reverse;
  }

  .detail-actions button {
    width: 100%;
  }

  #stock-filter {
    margin-left: 0;
    margin-top: 12px;
    width: 100%;
    justify-content: center;
  }

  .courses-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .courses-search {
    width: 100%;
  }

  .filter-pills {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .stat-value {
    font-size: 1.25rem;
  }

  .stat-icon {
    width: 48px;
    height: 48px;
    font-size: 1.5rem;
  }

  .upload-zone {
    padding: 30px 16px;
  }

  .upload-icon {
    font-size: 2.5rem;
  }
}

/* Botones de acción en tarjeta */
.product-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--glass-border);
}

.btn-edit,
.btn-delete {
  flex: 1;
  padding: 8px;
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  background: var(--glass-bg);
  color: var(--text-primary);
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-edit:hover {
  background: #2196F3;
  color: white;
  border-color: #2196F3;
}

.btn-delete:hover {
  background: #D00000;
  color: white;
  border-color: #D00000;
}

/* Ocultar zona de foto en modo edición */
.upload-zone.hidden {
  display: none;
}

.field-hint {
  display: block;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-top: 4px;
}

/* ============================================
   GRID DE NAVEGACIÓN
   ============================================ */
.nav-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding: 4px;
}

.nav-grid-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 12px 8px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.nav-grid-item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-color);
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.25s;
  pointer-events: none;
}

.nav-grid-item:hover {
  background: var(--message-user-bg);
  border-color: var(--accent-color);
  transform: translateY(-2px);
}

.nav-grid-item:hover::before {
  opacity: 0.06;
}

.nav-grid-item.active-link {
  background: var(--secondary-container);
  border-color: var(--accent-color);
  box-shadow: 0 2px 8px var(--accent-glow);
}

.nav-icon {
  font-size: 1.5rem;
  margin-bottom: 4px;
  line-height: 1;
}

.nav-label {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-align: center;
}

.nav-grid-item.active-link .nav-label {
  color: var(--accent-color);
  font-weight: 600;
}

/* ============================================
   MENÚS ANIDADOS (DENTRO DE EXPLORAR)
   ============================================ */
.nested-collapsible {
  margin-bottom: 8px;
  border-left: 2px solid var(--glass-border);
  padding-left: 8px;
  /* Importante: El padre no debe cortar el hijo si está abierto */
  overflow: visible;
}

.nested-header {
  padding: 6px 0;
}

.nested-header h5 {
  margin: 0;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.nested-content {
  margin-left: 8px;
}

/* Ajuste para que las conversaciones ocupen todo el espacio */
.sidebar-section[style*="flex: 1"] {
  display: flex !important;
  flex-direction: column !important;
  min-height: 0 !important;
}

.nested-content ul {
  padding-left: 0;
  margin: 0;
}

/* ============================================
   ADMIN DASHBOARD TABS
   Clases mínimas para el sistema de pestañas
   del panel docente (classroom_admin.html)
   ============================================ */

/* Contenedor de tabs */
.tabs-container {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--glass-shadow);
  overflow: hidden;
  max-width: 1200px;
  margin: 20px auto 0;
}

/* Nav de tabs — usa el mismo look que filter-pills pero anclado */
.admin-tabs-nav {
  display: flex;
  background: rgba(0, 0, 0, 0.03);
  border-bottom: 1px solid var(--glass-border);
  overflow-x: auto;
  scrollbar-width: none;
}

.admin-tabs-nav::-webkit-scrollbar {
  display: none;
}

[data-theme="dark"] .admin-tabs-nav {
  background: rgba(255, 255, 255, 0.03);
}

.admin-tab-btn {
  flex: 1;
  min-width: 120px;
  padding: 18px 20px;
  border: none;
  background: none;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  position: relative;
  white-space: nowrap;
}

.admin-tab-btn:hover {
  color: var(--accent-color);
  background: rgba(0, 0, 0, 0.02);
}

.admin-tab-btn.active {
  color: var(--accent-color);
  background: var(--glass-bg);
}

.admin-tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent-gradient);
  border-radius: 3px 3px 0 0;
}

/* Contenido de tabs */
.admin-tab-content {
  display: none;
  padding: 30px;
  animation: fadeIn 0.35s cubic-bezier(0.05, 0.7, 0.1, 1);
}

.admin-tab-content.active {
  display: block;
}

/* Tabla de datos — hereda de .data-table existente */
.data-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0 8px;
}

.data-table th {
  text-align: left;
  padding: 12px 16px;
  color: var(--text-tertiary);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.data-table td {
  background: var(--bg-primary);
  padding: 14px 16px;
  vertical-align: middle;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.data-table td:first-child {
  border-radius: var(--border-radius-sm) 0 0 var(--border-radius-sm);
}

.data-table td:last-child {
  border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
}

.data-table tr {
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
  transition: all var(--transition-fast);
}

.data-table tr:hover td {
  background: var(--secondary-container);
}

/* Badges de estado en tabla */
.badge {
  padding: 4px 10px;
  border-radius: var(--border-radius-pill);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  display: inline-block;
}

.badge-pending {
  background: rgba(255, 159, 10, 0.15);
  color: #FF9F0A;
}

.badge-completed {
  background: rgba(56, 106, 32, 0.15);
  color: #386A20;
}

[data-theme="dark"] .badge-pending {
  background: rgba(255, 159, 10, 0.2);
  color: #FFB74D;
}

[data-theme="dark"] .badge-completed {
  background: rgba(56, 106, 32, 0.2);
  color: #A8D88C;
}

/* Botones de acción en tabla */
.action-btn {
  padding: 6px 12px;
  border: none;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  margin-right: 4px;
  font-family: inherit;
}

.btn-edit {
  background: rgba(33, 150, 243, 0.1);
  color: #1976d2;
  border: 1px solid rgba(33, 150, 243, 0.2);
}

.btn-edit:hover {
  background: #1976d2;
  color: white;
  border-color: #1976d2;
}

.btn-delete {
  background: rgba(208, 0, 0, 0.1);
  color: #d32f2f;
  border: 1px solid rgba(208, 0, 0, 0.2);
}

.btn-delete:hover {
  background: #d32f2f;
  color: white;
  border-color: #d32f2f;
}



/* Responsive admin dashboard */
@media (max-width: 768px) {
  .admin-tab-content {
    padding: 20px 16px;
  }

  .admin-tab-btn {
    padding: 14px 12px;
    font-size: 0.82rem;
  }

  .data-table th,
  .data-table td {
    padding: 10px 12px;
    font-size: 0.82rem;
  }
}

/* ============================================
   SETTINGS SIDEBAR BUTTON
   Agregar en styles.css o styles-additions.css
   ============================================ */

/* ============================================
   ORBES DINÁMICOS — body::before
   Permite que el color de fondo animado cambie
   al seleccionar un color en settings.html.
   Agregar al final de styles.css (o en este archivo).
   ============================================ */
body::before {
  background:
    radial-gradient(circle at 25% 25%, var(--orb-1, rgba(103, 80, 164, 0.12)), transparent 45%),
    radial-gradient(circle at 75% 60%, var(--orb-2, rgba(125, 82, 96, 0.08)), transparent 45%),
    radial-gradient(circle at 50% 80%, var(--orb-3, rgba(98, 91, 113, 0.06)), transparent 40%);
}


/* Botón de Configuración — mismo estilo base que logout-btn */
.settings-sidebar-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: calc(100% - 24px);
  margin: 0 auto 6px;
  padding: 10px 14px;
  background: transparent;
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.settings-sidebar-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-color);
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.25s;
  pointer-events: none;
}

.settings-sidebar-btn:hover {
  background: var(--message-user-bg);
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.settings-sidebar-btn:hover::after {
  opacity: 0.06;
}

.settings-sidebar-btn.active {
  background: var(--secondary-container);
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.settings-sidebar-btn svg {
  width: 16px !important;
  height: 16px !important;
  fill: currentColor !important;
  flex-shrink: 0;
  display: block !important;
}

/* Modo oscuro */
[data-theme="dark"] .settings-sidebar-btn {
  border-color: #444;
  color: #ccc;
}

[data-theme="dark"] .settings-sidebar-btn:hover,
[data-theme="dark"] .settings-sidebar-btn.active {
  background: rgba(208, 188, 255, 0.10);
  border-color: var(--accent-color);
  color: var(--accent-color);
}

/* Colapsado: ocultar texto */
.mobile-sidebar.collapsed .settings-sidebar-btn span {
  display: none;
}

.mobile-sidebar.collapsed .settings-sidebar-btn {
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  margin: 0 auto 6px;
  border-radius: 50%;
}

/* Responsivo móvil */
@media (max-width: 768px) {
  .settings-sidebar-btn {
    width: calc(100% - 24px);
    padding: 10px 14px;
    font-size: 0.85rem;
  }
}

/* ============================================
   ANIMACIONES REDUCIDAS (accesibilidad)
   ============================================ */
.reduce-motion *,
.reduce-motion *::before,
.reduce-motion *::after {
  animation-duration: 0.01ms !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0.01ms !important;
}

/* Animación indicador de imagen */
.image-loader {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brush-icon {
  color: var(--accent, #a78bfa);
  animation: brushPaint 1.2s ease-in-out infinite alternate;
}

@keyframes brushPaint {
  0% {
    transform: rotate(-15deg) translateY(0px);
    opacity: 0.7;
  }

  100% {
    transform: rotate(15deg) translateY(-4px);
    opacity: 1;
  }
}

.image-spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(167, 139, 250, 0.3);
  border-top-color: var(--accent, #a78bfa);
  border-radius: 50%;
  animation: imageSpin 0.8s linear infinite;
}

@keyframes imageSpin {
  to {
    transform: rotate(360deg);
  }
}

/* Botón de descarga solo ícono */
.image-download-btn {
  padding: 6px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary, #ffffff);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s;
}

.image-download-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

.image-download-btn svg {
  flex-shrink: 0;
}

#btn-open-add-modal {
  position: fixed !important;
  bottom: 24px !important;
  right: 24px !important;
  z-index: 999;
  /* Asegura que flote por encima del contenido */
  box-shadow: 0 4px 16px var(--accent-glow) !important;
}