:root {
  /* Paleta Azul Psicológica - Nutrición Clínica */
  --bg-body: #f5f8fa;
  --bg-card: #ffffff;
  --text-main: #0b1727;
  --text-muted: #52637a;
  --primary: #0f294d;
  --accent: #1d4ed8;
  --accent-hover: #1e40af;
  --accent-light: #eff6ff;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --border-color: #e2e8f0;

  /* Sombras y Radios */
  --shadow-sm: 0 2px 4px rgba(11, 23, 39, 0.02);
  --shadow-md:
    0 10px 25px -5px rgba(29, 78, 216, 0.05),
    0 8px 10px -6px rgba(29, 78, 216, 0.01);
  --shadow-lg: 0 20px 40px -10px rgba(29, 78, 216, 0.08);
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Plus Jakarta Sans", sans-serif;
}
body {
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a {
  text-decoration: none;
  color: inherit;
}
ul {
  list-style: none;
}
button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Botones y Tarjetas */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
}
.btn-primary {
  background-color: var(--accent);
  color: white;
  box-shadow: 0 4px 14px rgba(29, 78, 216, 0.3);
}
.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(29, 78, 216, 0.4);
}
.btn-outline {
  border: 2px solid var(--border-color);
  color: var(--text-main);
  background: var(--bg-card);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(255, 255, 255, 0.5);
  transition: var(--transition);
}
.card:hover {
  box-shadow: var(--shadow-lg);
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}
.section-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1rem;
}
.section-header p {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

/* Navegación y SPA */
.top-nav {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1rem 0;
}
.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.logo i {
  color: var(--accent);
  font-size: 1.8rem;
}
.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}
.nav-links a {
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
}

.view-section {
  display: none;
  padding: 2rem 0 1rem;
  animation: fadeIn 0.4s ease forwards;
}
.view-section.active {
  display: block;
}
.nav-group {
  display: none;
}
.nav-group.active {
  display: flex;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}
@keyframes slideOut {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(100%);
    opacity: 0;
  }
}

/* Hero & Login */
.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4rem;
  min-height: 70vh;
}
.hero-content {
  flex: 1;
}
.hero-content h1 {
  font-size: 3.5rem;
  line-height: 1.1;
  color: var(--primary);
  margin-bottom: 1.5rem;
  letter-spacing: -1px;
}
.hero-content p {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}
.hero-image {
  flex: 1;
  position: relative;
}
.hero-image img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.login-wrapper {
  max-width: 500px;
  margin: 0 auto;
  text-align: center;
}
.btn-login {
  width: 100%;
  padding: 1.5rem;
  font-size: 1.1rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  color: var(--text-main);
  transition: var(--transition);
  margin-top: 1rem;
}
.btn-login:hover {
  border-color: var(--accent);
  background: var(--accent-light);
  transform: translateX(5px);
}
.btn-login i {
  font-size: 1.5rem;
  color: var(--accent);
}

/* Vistas Alumno */
.dashboard-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
}
.resume-course {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  border-radius: var(--radius-lg);
  padding: 3rem;
  position: relative;
  overflow: hidden;
}
.progress-circle-container {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.progress-circle {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: conic-gradient(var(--success) 68%, rgba(255, 255, 255, 0.2) 0);
  display: flex;
  align-items: center;
  justify-content: center;
}
.progress-circle::before {
  content: "68%";
  width: 65px;
  height: 65px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}

.classroom-layout {
  display: grid;
  grid-template-columns: 3fr 1fr;
  gap: 2rem;
  align-items: start;
}
.video-player {
  background: #000;
  border-radius: var(--radius-lg);
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  position: relative;
  box-shadow: var(--shadow-md);
  overflow: hidden;
}
.video-player img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.6;
}
.play-btn {
  position: absolute;
  width: 80px;
  height: 80px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  cursor: pointer;
  transition: var(--transition);
  z-index: 5;
}
.play-btn:hover {
  transform: scale(1.1);
  background: var(--accent-hover);
}

.module-list {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}
.tabs {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 1rem;
}
.tab-btn {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  transition: var(--transition);
}
.tab-btn.active {
  background: var(--accent-light);
  color: var(--accent);
}

/* Vistas Admin */
.admin-wrapper {
  display: none;
  height: calc(100vh - 54px); 
  overflow: hidden;
  background: var(--bg-body);
}
.admin-wrapper.active {
  display: flex;
}
.admin-sidebar {
  width: 280px;
  background: var(--primary);
  color: white;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  height: 100%; /* ¡El ancla mágica que obliga a que respete el límite! */
}
.admin-sidebar .logo {
  color: white;
  padding: 1.5rem;
}
.admin-sidebar .logo i {
  color: var(--accent-light);
}
.admin-nav {
  flex: 1;
  /* Le damos 2rem de espacio al fondo para que el botón respire */
  padding: 0 1rem 2rem 1rem; 
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.admin-nav a {
  padding: 0.8rem 1rem;
  border-radius: var(--radius-md);
  color: rgba(255, 255, 255, 0.7);
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: var(--transition);
  font-weight: 500;
}
.admin-nav a:hover,
.admin-nav a.active {
  background: rgba(255, 255, 255, 0.1);
  color: white;
}
.admin-main {
  flex: 1;
  overflow-y: auto;
  padding: 2rem 3rem;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 3rem;
}
.stat-card {
  background: var(--bg-card);
  padding: 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.data-table th,
.data-table td {
  padding: 1.25rem 1.5rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}
.badge {
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
}
.badge.active {
  background: #d1fae5;
  color: #065f46;
}
.badge.pending {
  background: #fef3c7;
  color: #92400e;
}

/* Responsive Real */
.admin-mobile-toggle {
  display: none;
  font-size: 1.8rem;
  color: white;
  cursor: pointer;
}


/* --- MENÚ DESPLEGABLE FLOTANTE POR HOVER --- */
.nav-dropdown {
  position: relative;
  display: inline-block;
}

/* El menú se oculta por defecto y aparece al poner el ratón encima del contenedor */
.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: -20px;
  background: white;
  min-width: 220px;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  flex-direction: column;
  padding: 0.5rem 0;
  z-index: 999;
  animation: fadeIn 0.2s ease forwards;
}

/* MAGIA PURA: Se abre solo al pasar el ratón por encima del bloque .nav-dropdown */
.nav-dropdown:hover .nav-dropdown-menu {
  display: flex !important;
}

.nav-dropdown-menu a {
  padding: 0.75rem 1.25rem !important;
  color: var(--text-main) !important;
  font-weight: 500 !important;
  text-decoration: none;
  width: 100%;
  box-sizing: border-box;
  transition:
    background 0.2s,
    color 0.2s;
}

.nav-dropdown-menu a:hover {
  background: var(--accent-light);
  color: var(--accent) !important;
}


/* --- NUEVOS ESTILOS INTERACTIVOS (MODALES, ACORDEONES Y MÓVIL) --- */

/* Menú Móvil */
.mobile-menu-toggle {
  display: none;
  font-size: 2rem;
  color: var(--primary);
  z-index: 1001;
}
.mobile-nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 300px;
  height: 100vh;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-lg);
  transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1000;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.mobile-nav.open {
  right: 0;
}
.mobile-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(11, 23, 39, 0.4);
  z-index: 999;
  display: none;
  backdrop-filter: blur(3px);
}
.mobile-overlay.active {
  display: block;
}

/* Sistema de Modales Reales */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(11, 23, 39, 0.6);
  backdrop-filter: blur(5px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}
.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}
.modal-box {
  background: var(--bg-card);
  width: 90%;
  max-width: 500px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 2rem;
  transform: translateY(20px) scale(0.95);
  transition: var(--transition);
  border: 1px solid rgba(255, 255, 255, 0.5);
}
.modal-overlay.active .modal-box {
  transform: translateY(0) scale(1);
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}
.modal-close {
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
  padding: 0.5rem;
  border-radius: var(--radius-md);
}
.modal-close:hover {
  color: var(--danger);
  background: #fee2e2;
}

.form-group {
  margin-bottom: 1.25rem;
}
.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  color: var(--primary);
}
.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 1rem;
  outline: none;
  transition: var(--transition);
  background: var(--bg-body);
}
.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-light);
  background: white;
}

/* Acordeones del Course Builder */
.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
  cursor: pointer;
  margin-bottom: 0.75rem;
}
.accordion-header:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}
.accordion-header.active {
  border-color: var(--accent);
  background: var(--accent-light);
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  margin-bottom: 0;
}
.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out;
  background: var(--bg-card);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  border: 1px solid transparent;
  border-top: none;
}
.accordion-content.expanded {
  border-color: var(--border-color);
  margin-bottom: 1.5rem;
}
.accordion-inner {
  padding: 1rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.accordion-icon {
  transition: transform 0.3s ease;
  font-size: 1.25rem;
  color: var(--text-muted);
}
.accordion-header.active .accordion-icon {
  transform: rotate(180deg);
  color: var(--accent);
}
.lesson-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  background: var(--bg-body);
  cursor: pointer;
  transition: var(--transition);
}

/* Estructura base para las filas de lecciones */
.lesson-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-body);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
}

/* El truco mágico: obliga a la columna del texto a encogerse si no hay espacio */
.lesson-row > div:first-child {
  flex: 1;
  min-width: 0; 
}
.lesson-item:hover,
.lesson-item.active {
  transform: translateX(5px);
  border-color: var(--accent);
  background: var(--accent-light);
}

/* Micro-interacción: Cargador de Video */
.video-loader {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 41, 77, 0.85);
  backdrop-filter: blur(4px);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 10;
  color: white;
  font-weight: 500;
}
.video-loader.loading {
  opacity: 1;
  pointer-events: auto;
}
.spinner {
  border: 4px solid rgba(255, 255, 255, 0.2);
  border-top: 4px solid var(--accent);
  border-radius: 50%;
  width: 50px;
  height: 50px;
  animation: spin 1s linear infinite;
}
@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* Toasts */
#toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.toast {
  background: var(--bg-card);
  color: var(--text-main);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 1rem;
  border-left: 4px solid var(--accent);
  animation: slideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  min-width: 300px;
}
.toast.success {
  border-color: var(--success);
}
.toast.warning {
  border-color: var(--warning);
}
.toast.danger {
  border-color: var(--danger);
}
.toast i {
  font-size: 1.25rem;
}



/* --- CORRECCIÓN VISUAL PARA LA BIBLIOTECA DE RECURSOS DEL ALUMNO --- */
#student-resources .resource-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 2rem;
  align-items: start;
}

#student-resources .resource-sidebar-menu {
  background: white;
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  border: 1px solid var(--border-color);
}

#student-resources .resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  width: 100%;
}

.resource-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 2rem;
  align-items: start;
}
.resource-sidebar-menu {
  background: white;
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  border: 1px solid var(--border-color);
}
.resource-nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  color: var(--text-main);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 0.25rem;
  font-size: 0.92rem;
}
.resource-nav-item i {
  font-size: 1.2rem;
  flex-shrink: 0;
}
.resource-nav-item:hover,
.resource-nav-item.active {
  background: var(--accent-light);
  color: var(--accent);
}
.resource-nav-category {
  justify-content: space-between;
}
.resource-nav-title {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--text-muted);
  text-transform: uppercase;
  margin: 1.5rem 0 0.75rem 0;
  letter-spacing: 0.5px;
}
.filter-pills {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.filter-pill {
  padding: 0.5rem 1.25rem;
  border-radius: 20px;
  background: white;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}
.filter-pill:hover,
.filter-pill.active {
  background: var(--accent-light);
  color: var(--accent);
  border-color: var(--accent);
}
.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}
.resource-card {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition:
    transform 0.2s,
    box-shadow 0.2s;
}
.resource-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}
.resource-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.grid-2-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

/* ==========================================================================
   PERSONALIZACIÓN DE LA BARRA DE SCROLL (SCROLLBAR)
   ========================================================================== */

/* Estándar moderno (Firefox) */
* {
  scrollbar-width: thin;
  /* Usamos el azul corporativo pero más translúcido */
  scrollbar-color: rgba(29, 78, 216, 0.4) var(--bg-body);
}

/* Navegadores Webkit (Chrome, Edge, Safari, Opera) */
::-webkit-scrollbar {
  width: 10px;
  height: 10px; 
}

::-webkit-scrollbar-track {
  background: var(--bg-body);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  /* Azul con 40% de opacidad para que sea mucho más suave */
  background: rgba(29, 78, 216, 0.4);
  border-radius: 10px;
  border: 2px solid var(--bg-body);
}

::-webkit-scrollbar-thumb:hover {
  /* Al pasar el ratón, se vuelve un poco más visible (70%) */
  background: rgba(29, 78, 216, 0.7);
}

/* 1. Dar aire por debajo al reproductor (Soluciona el problema de PC) */
#lms-course-player {
  padding-bottom: 3rem; 
}

/* 2. Controlar la tabla inyectada por JS para que no rompa el diseño */
.lesson-article {
  word-break: break-word;
  overflow-x: hidden;
}

.lesson-table {
  width: 100%;
  display: block; /* Permite que la tabla tenga su propio scroll horizontal */
  overflow-x: auto;
  white-space: nowrap;
  border-collapse: collapse;
  margin-top: 1.5rem;
  margin-bottom: 1.5rem;
}

.lesson-table th, 
.lesson-table td {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
}

.lesson-table th {
  background: var(--bg-body);
  color: var(--primary);
}

/* ==========================================================================
   DISEÑO RESPONSIVE MÓVIL Y TABLET (VISTA ALUMNO & ADMIN)
   ========================================================================== */

/* --- TABLETS Y MÓVILES EN HORIZONTAL (hasta 1024px) --- */
@media (max-width: 1024px) {
  .dashboard-grid,
  .classroom-layout,
  .course-player-grid,
  .resource-layout {
    grid-template-columns: 1fr !important;
    gap: 1.5rem !important;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }

  .resource-sidebar-menu {
    width: 100% !important;
    margin-bottom: 0.5rem;
  }
  .resource-grid {
    grid-template-columns: 1fr !important;
  }
}

/* ==========================================================================
   DISEÑO RESPONSIVE MÓVIL (hasta 768px) - CORRECCIÓN TOTAL ALUMNO & ADMIN
   ========================================================================== */
@media (max-width: 768px) {
  .grid-2-columns {
    grid-template-columns: 1fr !important;
    gap: 2rem !important;
  }

  body,
  html {
    overflow-x: hidden !important;
    width: 100% !important;
  }

  .container {
    padding: 0 1.25rem !important;
  }

  .nav-links.nav-group {
    display: none !important;
  }

  .mobile-menu-toggle {
    display: block !important;
  }

  .responsive-two-cols {
    display: flex !important;
    flex-direction: column !important;
    width: 100% !important;
    gap: 1.5rem !important;
  }

  .responsive-two-cols > div {
    min-width: 0 !important;
    max-width: 100% !important;
  }

  .card {
    min-width: 0 !important;
    max-width: 100% !important;
    overflow-x: hidden !important; 
    overflow-wrap: break-word !important;
    word-wrap: break-word !important;
  }

  /* --- CABECERA DEL EDITOR DE LECCIONES EN MÓVIL --- */
  #admin-lesson-editor > div:first-child > div:first-child {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 1rem !important;
  }

  #admin-lesson-editor > div:first-child > div:first-child > div {
    width: 100% !important;
    display: flex !important;
    flex-wrap: wrap !important;
    justify-content: space-between !important; 
    gap: 0.75rem !important;
  }

  #admin-lesson-editor > div:first-child > div:first-child > div > button.btn-primary {
    flex-grow: 1 !important;
    justify-content: center !important;
  }
  /* ----------------------------------------------- */

  div[style*="grid-template-columns: repeat(auto-fill"],
  div[style*="minmax(350px"] {
    grid-template-columns: 1fr !important;
    gap: 1.5rem !important;
  }

  .card,
  .resume-course {
    width: 100% !important;
    box-sizing: border-box !important;
    padding: 1.25rem !important;
  }

  #challenge-player div[style*="justify-content: center"] > div.card {
    width: calc(33.33% - 0.7rem) !important;
    padding: 0.75rem !important;
  }

  #day-5-card {
    transform: scale(1.05) !important;
    z-index: 10 !important;
  }

  div[style*="height: 400px"],
  div[style*="height: 350px"] {
    height: auto !important;
    aspect-ratio: 16/9 !important;
  }

  div[style*="overflow-x: auto"] {
      width: 100% !important;
      margin-left: 0 !important;
      margin-right: 0 !important;
      padding-left: 0 !important;
      padding-right: 0 !important;
  }
  
  .data-table th,
  .data-table td {
    padding: 1rem !important;
    font-size: 0.85rem;
  }

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

  .stats-grid {
    grid-template-columns: 1fr 1fr !important;
  }

  .admin-wrapper.active {
    flex-direction: column !important;
  }

  .view-section {
    display: none;
    padding: 1rem 0 2rem;
    animation: fadeIn 0.4s ease forwards;
  }


}