/**
 * NexaLMS Universe — Design System
 * Sistema de diseño completo con glassmorphism, animaciones y paleta vibrante.
 * Español como idioma predeterminado.
 * Compatible con cualquier tema WordPress.
 */

/* ═══════════════════════════════════════════
   1. VARIABLES CSS (Design Tokens)
   ═══════════════════════════════════════════ */
:root {
  /* Paleta Principal — Morado/Azul/Verde */
  --nxa-primary-50: #f5f3ff;
  --nxa-primary-100: #ede9fe;
  --nxa-primary-200: #ddd6fe;
  --nxa-primary-300: #c4b5fd;
  --nxa-primary-400: #a78bfa;
  --nxa-primary-500: #8b5cf6;
  --nxa-primary-600: #7c3aed;
  --nxa-primary-700: #6d28d9;
  --nxa-primary-800: #5b21b6;
  --nxa-primary-900: #4c1d95;

  /* Acento — Azul Eléctrico */
  --nxa-accent-400: #60a5fa;
  --nxa-accent-500: #3b82f6;
  --nxa-accent-600: #2563eb;

  /* Éxito — Verde Esmeralda */
  --nxa-success-400: #34d399;
  --nxa-success-500: #10b981;
  --nxa-success-600: #059669;

  /* Advertencia */
  --nxa-warning-500: #f59e0b;
  --nxa-danger-500: #ef4444;

  /* Neutros */
  --nxa-gray-50: #f8fafc;
  --nxa-gray-100: #f1f5f9;
  --nxa-gray-200: #e2e8f0;
  --nxa-gray-300: #cbd5e1;
  --nxa-gray-400: #94a3b8;
  --nxa-gray-500: #64748b;
  --nxa-gray-600: #475569;
  --nxa-gray-700: #334155;
  --nxa-gray-800: #1e293b;
  --nxa-gray-900: #0f172a;

  /* Gradientes */
  --nxa-gradient-primary: linear-gradient(135deg, #7c3aed 0%, #3b82f6 50%, #10b981 100%);
  --nxa-gradient-hero: linear-gradient(135deg, #4c1d95 0%, #6d28d9 40%, #2563eb 100%);
  --nxa-gradient-card: linear-gradient(145deg, rgba(139, 92, 246, 0.05) 0%, rgba(59, 130, 246, 0.05) 100%);
  --nxa-gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);

  /* Sombras */
  --nxa-shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --nxa-shadow-md: 0 4px 12px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.04);
  --nxa-shadow-lg: 0 10px 30px rgba(0,0,0,0.08), 0 4px 8px rgba(0,0,0,0.04);
  --nxa-shadow-xl: 0 20px 50px rgba(0,0,0,0.12), 0 8px 16px rgba(0,0,0,0.06);
  --nxa-shadow-glow: 0 0 20px rgba(124, 58, 237, 0.15), 0 0 60px rgba(124, 58, 237, 0.05);
  --nxa-shadow-card-hover: 0 12px 40px rgba(124, 58, 237, 0.12), 0 4px 12px rgba(0,0,0,0.06);

  /* Glassmorphism */
  --nxa-glass-bg: rgba(255, 255, 255, 0.7);
  --nxa-glass-border: rgba(255, 255, 255, 0.3);
  --nxa-glass-blur: blur(16px);

  /* Bordes */
  --nxa-radius-sm: 6px;
  --nxa-radius-md: 10px;
  --nxa-radius-lg: 16px;
  --nxa-radius-xl: 24px;
  --nxa-radius-full: 9999px;

  /* Tipografía */
  --nxa-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --nxa-font-display: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Transiciones */
  --nxa-transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --nxa-transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --nxa-transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --nxa-transition-bounce: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ═══════════════════════════════════════════
   2. BASE & RESET (Scoped)
   ═══════════════════════════════════════════ */

/* Override para temas FSE (twentytwentyfive, etc.) que limitan el ancho del contenido */
.entry-content .nxa-app,
.wp-block-post-content .nxa-app,
.page-content .nxa-app,
.post-content .nxa-app,
article .nxa-app {
  max-width: none !important;
  width: 100% !important;
  padding: 0 !important;
  margin: 0 !important;
}

.entry-content > .nxa-app,
.wp-block-post-content > .nxa-app {
  max-width: none !important;
}

/* Neutralizar contenedores restrictivos del tema FSE */
.is-layout-constrained > .nxa-app,
.is-layout-flow > .nxa-app,
.wp-block-group > .nxa-app {
  max-width: none !important;
  margin-left: 0 !important;
  margin-right: 0 !important;
}

/* Neutralizar estilos de botones del tema FSE */
.nxa-app button.nxa-btn,
.nxa-app a.nxa-btn {
  font-size: 13px !important;
  padding: 8px 16px !important;
  line-height: 1.4 !important;
  letter-spacing: normal !important;
  text-transform: none !important;
}
.nxa-app button.nxa-btn.nxa-btn-lg,
.nxa-app a.nxa-btn.nxa-btn-lg {
  font-size: 15px !important;
  padding: 12px 24px !important;
}

.nxa-app {
  font-family: var(--nxa-font-sans);
  color: var(--nxa-gray-800);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  width: 100%;
}

.nxa-app *, .nxa-app *::before, .nxa-app *::after {
  box-sizing: border-box;
}

/* ═══════════════════════════════════════════
   3. CONTENEDORES
   ═══════════════════════════════════════════ */
.nxa-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

.nxa-container-sm { max-width: 680px; margin: 0 auto; padding: 0 24px; width: 100%; }
.nxa-container-lg { max-width: 1600px; margin: 0 auto; padding: 0 32px; width: 100%; }

/* ═══════════════════════════════════════════
   4. TARJETAS Y PANELES (Glassmorphism)
   ═══════════════════════════════════════════ */
.nxa-card {
  background: var(--nxa-glass-bg);
  backdrop-filter: var(--nxa-glass-blur);
  -webkit-backdrop-filter: var(--nxa-glass-blur);
  border: 1px solid var(--nxa-gray-200);
  border-radius: var(--nxa-radius-lg);
  padding: 24px;
  box-shadow: var(--nxa-shadow-sm);
  transition: all var(--nxa-transition-normal);
}

.nxa-card:hover {
  box-shadow: var(--nxa-shadow-card-hover);
  transform: translateY(-2px);
  border-color: var(--nxa-primary-200);
}

.nxa-card-glass {
  background: var(--nxa-glass-bg);
  backdrop-filter: var(--nxa-glass-blur);
  border: 1px solid var(--nxa-glass-border);
  border-radius: var(--nxa-radius-xl);
  padding: 32px;
  box-shadow: var(--nxa-shadow-glow);
}

.nxa-panel {
  background: #fff;
  border: 1px solid var(--nxa-gray-200);
  border-radius: var(--nxa-radius-lg);
  padding: 24px;
  box-shadow: var(--nxa-shadow-sm);
}

/* ═══════════════════════════════════════════
   5. BOTONES
   ═══════════════════════════════════════════ */
.nxa-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--nxa-radius-md);
  font-family: var(--nxa-font-sans);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--nxa-transition-fast);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.nxa-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.1);
  opacity: 0;
  transition: opacity var(--nxa-transition-fast);
}

.nxa-btn:hover::after { opacity: 1; }
.nxa-btn:active { transform: scale(0.97); }

.nxa-btn-primary {
  background: var(--nxa-gradient-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(124, 58, 237, 0.25);
}
.nxa-btn-primary:hover {
  box-shadow: 0 6px 20px rgba(124, 58, 237, 0.35);
  transform: translateY(-1px);
}

.nxa-btn-secondary {
  background: var(--nxa-gray-100);
  color: var(--nxa-gray-700);
  border: 1px solid var(--nxa-gray-200);
}
.nxa-btn-secondary:hover {
  background: var(--nxa-gray-200);
  border-color: var(--nxa-gray-300);
}

.nxa-btn-outline {
  background: transparent;
  color: var(--nxa-primary-600);
  border: 2px solid var(--nxa-primary-300);
}
.nxa-btn-outline:hover {
  background: var(--nxa-primary-50);
  border-color: var(--nxa-primary-500);
}

.nxa-btn-ghost {
  background: transparent;
  color: var(--nxa-gray-600);
}
.nxa-btn-ghost:hover { background: var(--nxa-gray-100); }

.nxa-btn-lg { padding: 14px 28px; font-size: 16px; border-radius: var(--nxa-radius-lg); }
.nxa-btn-sm { padding: 6px 12px; font-size: 12px; }
.nxa-btn-full { width: 100%; }

/* ═══════════════════════════════════════════
   6. INPUTS Y FORMULARIOS
   ═══════════════════════════════════════════ */
.nxa-input {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--nxa-gray-200);
  border-radius: var(--nxa-radius-md);
  font-family: var(--nxa-font-sans);
  font-size: 14px;
  color: var(--nxa-gray-800);
  background: #fff;
  transition: all var(--nxa-transition-fast);
}

.nxa-input:focus {
  outline: none;
  border-color: var(--nxa-primary-400);
  box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.1);
}

.nxa-input::placeholder { color: var(--nxa-gray-400); }

.nxa-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--nxa-gray-600);
  margin-bottom: 6px;
}

.nxa-form-group { margin-bottom: 20px; }

/* ═══════════════════════════════════════════
   7. TIPOGRAFÍA
   ═══════════════════════════════════════════ */
.nxa-title-xl {
  font-family: var(--nxa-font-display);
  font-size: 36px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--nxa-gray-900);
  letter-spacing: -0.02em;
}

.nxa-title-lg { font-size: 28px; font-weight: 700; color: var(--nxa-gray-900); letter-spacing: -0.01em; }
.nxa-title-md { font-size: 20px; font-weight: 700; color: var(--nxa-gray-800); }
.nxa-title-sm { font-size: 16px; font-weight: 600; color: var(--nxa-gray-800); }
.nxa-text { font-size: 14px; color: var(--nxa-gray-600); line-height: 1.7; }
.nxa-text-sm { font-size: 12px; color: var(--nxa-gray-500); }
.nxa-text-gradient {
  background: var(--nxa-gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ═══════════════════════════════════════════
   8. BADGES Y ETIQUETAS
   ═══════════════════════════════════════════ */
.nxa-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--nxa-radius-full);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.nxa-badge-primary { background: var(--nxa-primary-100); color: var(--nxa-primary-700); }
.nxa-badge-success { background: #dcfce7; color: #166534; }
.nxa-badge-warning { background: #fef3c7; color: #92400e; }
.nxa-badge-danger { background: #fee2e2; color: #991b1b; }
.nxa-badge-info { background: #dbeafe; color: #1e40af; }

/* ═══════════════════════════════════════════
   9. BARRAS DE PROGRESO
   ═══════════════════════════════════════════ */
.nxa-progress {
  width: 100%;
  height: 8px;
  background: var(--nxa-gray-100);
  border-radius: var(--nxa-radius-full);
  overflow: hidden;
}

.nxa-progress-bar {
  height: 100%;
  background: var(--nxa-gradient-primary);
  border-radius: var(--nxa-radius-full);
  transition: width var(--nxa-transition-slow);
}

.nxa-progress-lg { height: 12px; }
.nxa-progress-sm { height: 4px; }

/* ═══════════════════════════════════════════
   10. TARJETAS DE CURSO
   ═══════════════════════════════════════════ */
.nxa-course-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.nxa-course-grid.nxa-cols-2 { grid-template-columns: repeat(2, 1fr); }
.nxa-course-grid.nxa-cols-3 { grid-template-columns: repeat(3, 1fr); }
.nxa-course-grid.nxa-cols-4 { grid-template-columns: repeat(4, 1fr); }

.nxa-course-card {
  background: #fff;
  border-radius: var(--nxa-radius-xl);
  overflow: hidden;
  border: 1px solid var(--nxa-gray-100);
  box-shadow: var(--nxa-shadow-sm);
  transition: all var(--nxa-transition-normal);
  display: flex;
  flex-direction: column;
}

.nxa-course-card:hover {
  box-shadow: var(--nxa-shadow-xl);
  transform: translateY(-4px);
  border-color: transparent;
}

.nxa-course-card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  background: var(--nxa-gradient-card);
}

.nxa-course-card-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.nxa-course-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--nxa-gray-900);
  margin: 8px 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.nxa-course-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--nxa-gray-100);
}

.nxa-course-price {
  font-size: 20px;
  font-weight: 800;
  color: var(--nxa-primary-600);
}
.nxa-course-price.free { color: var(--nxa-success-600); }

/* ═══════════════════════════════════════════
   11. STATS CARDS
   ═══════════════════════════════════════════ */
.nxa-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.nxa-stat-card {
  background: #fff;
  border: 1px solid var(--nxa-gray-100);
  border-radius: var(--nxa-radius-lg);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all var(--nxa-transition-fast);
}

.nxa-stat-card:hover {
  border-color: var(--nxa-primary-200);
  box-shadow: var(--nxa-shadow-md);
}

.nxa-stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--nxa-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  background: var(--nxa-primary-50);
}

.nxa-stat-value { font-size: 28px; font-weight: 800; color: var(--nxa-gray-900); line-height: 1; }
.nxa-stat-label { font-size: 12px; color: var(--nxa-gray-500); margin-top: 4px; }

/* ═══════════════════════════════════════════
   12. AUTH SCREENS
   ═══════════════════════════════════════════ */
.nxa-auth-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--nxa-gradient-hero);
  padding: 24px;
}

.nxa-auth-card {
  background: var(--nxa-glass-bg);
  backdrop-filter: var(--nxa-glass-blur);
  border: 1px solid var(--nxa-glass-border);
  border-radius: var(--nxa-radius-xl);
  padding: 40px;
  width: 100%;
  max-width: 440px;
  box-shadow: var(--nxa-shadow-xl);
}

.nxa-auth-title {
  text-align: center;
  font-size: 24px;
  font-weight: 800;
  color: var(--nxa-gray-900);
  margin-bottom: 4px;
}

.nxa-auth-subtitle {
  text-align: center;
  color: var(--nxa-gray-500);
  font-size: 14px;
  margin-bottom: 28px;
}

/* ═══════════════════════════════════════════
   13. ANIMACIONES
   ═══════════════════════════════════════════ */
@keyframes nxa-fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes nxa-slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes nxa-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

@keyframes nxa-shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.nxa-animate-fade { animation: nxa-fadeIn 0.4s ease-out; }
.nxa-animate-slide { animation: nxa-slideUp 0.5s ease-out; }
.nxa-animate-scale { animation: nxa-scaleIn 0.3s ease-out; }
.nxa-animate-pulse { animation: nxa-pulse 2s infinite; }

/* Stagger children animations */
.nxa-stagger > * { animation: nxa-fadeIn 0.4s ease-out both; }
.nxa-stagger > *:nth-child(1) { animation-delay: 0.05s; }
.nxa-stagger > *:nth-child(2) { animation-delay: 0.1s; }
.nxa-stagger > *:nth-child(3) { animation-delay: 0.15s; }
.nxa-stagger > *:nth-child(4) { animation-delay: 0.2s; }
.nxa-stagger > *:nth-child(5) { animation-delay: 0.25s; }
.nxa-stagger > *:nth-child(6) { animation-delay: 0.3s; }

/* Skeleton loading */
.nxa-skeleton {
  background: linear-gradient(90deg, var(--nxa-gray-100) 25%, var(--nxa-gray-200) 50%, var(--nxa-gray-100) 75%);
  background-size: 200% 100%;
  animation: nxa-shimmer 1.5s infinite;
  border-radius: var(--nxa-radius-md);
}

/* ═══════════════════════════════════════════
   14. MODAL / OVERLAY
   ═══════════════════════════════════════════ */
.nxa-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99999;
  padding: 24px;
  animation: nxa-fadeIn 0.2s ease-out;
}

.nxa-modal {
  background: #fff;
  border-radius: var(--nxa-radius-xl);
  padding: 32px;
  width: 100%;
  max-width: 560px;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--nxa-shadow-xl);
  animation: nxa-scaleIn 0.3s ease-out;
}

/* ═══════════════════════════════════════════
   15. RESPONSIVE
   ═══════════════════════════════════════════ */
@media (max-width: 1024px) {
  .nxa-container { padding: 0 20px; }
  .nxa-course-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 16px; }
}

@media (max-width: 768px) {
  .nxa-course-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 14px; }
  .nxa-stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .nxa-container { padding: 0 16px; }
  .nxa-title-xl { font-size: 26px; }
  .nxa-title-lg { font-size: 22px; }
  .nxa-auth-card { padding: 24px; }
  .nxa-modal { padding: 20px; max-width: 95%; }
  .nxa-card { padding: 16px; }
  .nxa-card-glass { padding: 24px; }
  .nxa-btn-lg { padding: 12px 20px; font-size: 14px; }
  .nxa-flex { flex-wrap: wrap; }
  .nxa-stat-card { padding: 14px; }
  .nxa-stat-value { font-size: 22px; }
}

@media (max-width: 480px) {
  .nxa-course-grid { grid-template-columns: 1fr !important; }
  .nxa-stats-grid { grid-template-columns: 1fr; }
  .nxa-course-card-img { height: 160px; }
  .nxa-title-xl { font-size: 22px; }
  .nxa-container { padding: 0 12px; }
  .nxa-card-glass { padding: 20px; }
  .nxa-auth-card { padding: 20px; border-radius: var(--nxa-radius-lg); }
  .nxa-modal { padding: 16px; border-radius: var(--nxa-radius-lg); }
  .nxa-course-card-body { padding: 14px; }
  .nxa-flex-between { flex-direction: column; align-items: flex-start; gap: 8px; }
}

/* ═══════════════════════════════════════════
   16. UTILITIES
   ═══════════════════════════════════════════ */
.nxa-flex { display: flex; }
.nxa-flex-center { display: flex; align-items: center; justify-content: center; }
.nxa-flex-between { display: flex; align-items: center; justify-content: space-between; }
.nxa-gap-sm { gap: 8px; }
.nxa-gap-md { gap: 16px; }
.nxa-gap-lg { gap: 24px; }
.nxa-mt-sm { margin-top: 8px; }
.nxa-mt-md { margin-top: 16px; }
.nxa-mt-lg { margin-top: 24px; }
.nxa-mb-md { margin-bottom: 16px; }
.nxa-text-center { text-align: center; }
.nxa-hidden { display: none; }