/* ============================================
   CATÁLOGO - MINIMALISTA Y COMPACTO
   Paleta Corporativa
   ============================================ */

:root {
  /* Colores Corporativos */
  --color-primary: #02408f;
  --color-secondary: #02b8eb;
  --color-accent: #ff9923;
  --color-neutral: #e8e8e8;
  
  /* Gradientes */
  --gradient-primary: linear-gradient(135deg, #02408f 0%, #02b8eb 100%);
  --gradient-accent: linear-gradient(135deg, #ff9923 0%, #ff7b00 100%);
  
  /* Espaciado compacto */
  --gap-xs: 8px;
  --gap-sm: 12px;
  --gap-md: 16px;
  
  /* Tipografía */
  --text-primary: #1a1a1a;
  --text-secondary: #4a4a4a;
  --text-tertiary: #6b7280;
  
  /* Transiciones */
  --transition: all 0.2s ease;
  
  /* Sombras sutiles */
  --shadow-xs: 0 1px 3px rgba(2, 64, 143, 0.08);
  --shadow-sm: 0 2px 8px rgba(2, 64, 143, 0.1);
  --shadow-hover: 0 8px 20px rgba(2, 184, 235, 0.15);
  
  /* Radios */
  --radius: 8px;
  --radius-sm: 6px;
}


/* ============================================
   HERO HEADER - CON GRADIENTE Y SOMBRAS
============================================ */

.catalogo-hero {
  padding: 32px 0;
  background: var(--gradient-primary);
  color: #ffffff;
  position: relative;
  overflow: hidden;
}

/* Patrón decorativo radial */
.catalogo-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 50%, rgba(2, 184, 235, 0.15) 0%, transparent 50%);
  opacity: 0.6;
}

.catalogo-hero .container {
  position: relative;
  z-index: 1;
  max-width: 1000px;
}

/* Badge superior */
.catalogo-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.7rem;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(255, 153, 35, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.2);
  margin-bottom: 10px;
  font-weight: 700;
  backdrop-filter: blur(8px);
}

.catalogo-badge i {
  font-size: 0.8rem;
  color: var(--color-accent);
}

.catalogo-hero h1 {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  font-weight: 800;
  margin: 0 0 10px;
  color: #ffffff;
  line-height: 1.2;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  gap: 12px;
}

.catalogo-hero h1 i {
  font-size: 1.8rem;
  color: var(--color-accent);
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.catalogo-hero p {
  max-width: 680px;
  margin: 0 auto;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.95);
  line-height: 1.6;
  text-align: center;
}


/* ============================================
   FILTROS - MINIMALISTA
============================================ */

.filters-section {
  padding: 20px 0;
  background: #fafbfc;
}

.filters-box {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  background: #ffffff;
  border-radius: 999px;
  padding: 8px 10px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-neutral);
}

/* Búsqueda con sugerencias */
.search-with-suggestions {
  position: relative;
  flex: 1 1 300px;
  min-width: 260px;
}

.search-input {
  width: 100%;
  border: none;
  outline: none;
  font-size: 0.9rem;
  padding: 9px 14px;
  background: transparent;
  color: var(--text-primary);
}

.search-input::placeholder {
  color: #9ca3af;
}

/* Select de categoría */
.filter-select {
  flex: 0 0 200px;
  border-radius: 999px;
  border: 1px solid var(--color-neutral);
  padding: 7px 32px 7px 12px;
  font-size: 0.85rem;
  background: #fafbfc;
  color: var(--text-secondary);
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--color-primary) 50%),
                    linear-gradient(135deg, var(--color-primary) 50%, transparent 50%);
  background-position: calc(100% - 12px) 50%, calc(100% - 7px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  transition: var(--transition);
}

.filter-select:hover {
  border-color: var(--color-secondary);
}

/* Botones */
.filters-box .btn {
  border-radius: 999px;
  font-size: 0.82rem;
  padding: 7px 16px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  font-weight: 600;
  transition: var(--transition);
}

.filters-box .btn-primary {
  background: var(--color-primary);
  color: #ffffff;
  border: none;
}

.filters-box .btn-primary:hover {
  background: var(--color-secondary);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(2, 184, 235, 0.3);
}

.filters-box .btn-secondary {
  background: var(--color-neutral);
  border: none;
  color: var(--text-primary);
}

.filters-box .btn-secondary:hover {
  background: #d1d5db;
}


/* ============================================
   RESULTS INFO - COMPACTO
============================================ */

.results-info {
  padding: 10px 0;
  background: #fafbfc;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--color-neutral);
}

.results-info strong {
  color: var(--color-primary);
  font-weight: 700;
}


/* ============================================
   GRID DE CURSOS - COMPACTO
============================================ */

.cursos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 20px;
  margin-bottom: 20px;
}

/* CARD CON EFECTO RADIAL */
.curso-card {
  background: #ffffff;
  border-radius: var(--radius);
  border: 1px solid var(--color-neutral);
  box-shadow: var(--shadow-xs);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  height: 100%;
}

/* Efecto radial sutil */
.curso-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 0 0, rgba(2, 184, 235, 0.08), transparent 55%);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
  z-index: 5;
}

.curso-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-secondary);
}

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

/* BADGES DESTACADO Y MODALIDAD */
.curso-card .badge-featured {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--gradient-accent);
  color: #ffffff;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.65rem;
  font-weight: 700;
  z-index: 20;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  box-shadow: 0 2px 8px rgba(255, 153, 35, 0.4);
  pointer-events: none;
}

.curso-card .badge-modalidad {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.65rem;
  font-weight: 700;
  z-index: 20;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  pointer-events: none;
}

.curso-card .badge-vivo-small {
  background: #ef4444;
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.4);
}

.curso-card .badge-hibrida-small {
  background: #8b5cf6;
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(139, 92, 246, 0.4);
}

/* IMAGEN */
.curso-imagen {
  width: 100%;
  height: 140px;
  background: linear-gradient(135deg, #f3f4f6, #e5e7eb);
  position: relative;
  overflow: hidden;
}

.curso-imagen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
  position: relative;
  z-index: 1;
}

.curso-card:hover .curso-imagen img {
  transform: scale(1.05);
}

/* Placeholder */
.curso-imagen .placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  color: #ffffff;
  font-size: 2rem;
  position: relative;
  z-index: 1;
  transition: var(--transition);
}

.curso-card:hover .curso-imagen .placeholder {
  transform: scale(1.1) rotate(5deg);
}

/* Badge de precio */
.curso-precio-badge {
  position: absolute;
  bottom: 10px;
  right: 10px;
  padding: 5px 12px;
  border-radius: 20px;
  background: rgba(2, 64, 143, 0.95);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(2, 64, 143, 0.4);
  backdrop-filter: blur(8px);
  z-index: 15;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.curso-precio-badge.gratis {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

/* CONTENIDO */
.curso-content {
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
  position: relative;
  z-index: 10;
}

/* Categoría */
.curso-categoria {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 20px;
  background: #eff6ff;
  color: var(--color-primary);
  font-size: 0.65rem;
  font-weight: 700;
  width: fit-content;
}

.curso-categoria i {
  font-size: 0.75rem;
}

/* Título */
.curso-titulo {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.6em;
  transition: color 0.2s ease;
}

.curso-card:hover .curso-titulo {
  color: var(--color-primary);
}

/* Descripción */
.curso-descripcion {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.4em;
  flex: 1;
}

/* Meta info */
.curso-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  padding-top: 10px;
  border-top: 1px solid var(--color-neutral);
  font-size: 0.72rem;
  color: var(--text-tertiary);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition);
}

.meta-item i {
  color: var(--color-secondary);
  font-size: 0.8rem;
  transition: var(--transition);
}

.curso-card:hover .meta-item {
  color: var(--text-secondary);
}

.curso-card:hover .meta-item i {
  color: var(--color-accent);
  transform: scale(1.08);
}


/* ============================================
   EMPTY STATE
============================================ */

.empty-state {
  text-align: center;
  padding: 50px 20px;
  color: var(--text-tertiary);
}

.empty-state i {
  font-size: 2.8rem;
  margin-bottom: 14px;
  color: #d1d5db;
  opacity: 0.6;
}

.empty-state h3 {
  font-size: 1.2rem;
  color: var(--text-primary);
  margin-bottom: 6px;
  font-weight: 700;
}

.empty-state p {
  font-size: 0.9rem;
  margin-bottom: 16px;
}


/* ============================================
   PAGINACIÓN - MINIMALISTA
============================================ */

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  margin-top: 24px;
  padding-bottom: 30px;
}

.pagination a,
.pagination span {
  min-width: 32px;
  height: 32px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  padding: 0 8px;
  border: 1px solid var(--color-neutral);
  color: var(--text-secondary);
  background: #ffffff;
  transition: var(--transition);
  font-weight: 600;
}

.pagination a:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
  transform: translateY(-1px);
}

.pagination a.active {
  background: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

.pagination span.disabled {
  color: #9ca3af;
  background: #f9fafb;
  cursor: not-allowed;
}


/* ============================================
   BÚSQUEDA AJAX - SUGERENCIAS
============================================ */

.search-suggestions {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  z-index: 30;
  background: #ffffff;
  border: 1px solid var(--color-neutral);
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(2, 64, 143, 0.12);
  max-height: 320px;
  overflow-y: auto;
  display: none;
}

.search-suggestions.visible {
  display: block;
}

.search-suggestion-item {
  display: flex;
  gap: 10px;
  padding: 10px 12px;
  cursor: pointer;
  align-items: center;
  transition: var(--transition);
  border-bottom: 1px solid #f3f4f6;
}

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

.search-suggestion-item:hover {
  background: rgba(2, 184, 235, 0.05);
}

.search-suggestion-thumb {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background: linear-gradient(135deg, #e5e7eb, #d1d5db);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-secondary);
  font-size: 1.2rem;
}

.search-suggestion-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.search-suggestion-info {
  flex: 1;
  min-width: 0;
}

.search-suggestion-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.search-suggestion-meta {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.search-suggestion-price {
  font-weight: 700;
  color: var(--color-primary);
}

.search-suggestion-price.gratis {
  color: #10b981;
}


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

@media (max-width: 768px) {
  .catalogo-hero {
    padding: 24px 0;
  }

  .catalogo-hero h1 {
    font-size: 1.4rem;
    gap: 10px;
  }

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

  .catalogo-hero p {
    font-size: 0.85rem;
  }

  .filters-section {
    padding: 16px 0;
  }

  .filters-box {
    flex-direction: column;
    align-items: stretch;
    border-radius: 16px;
    padding: 12px;
    gap: 10px;
  }

  .search-with-suggestions {
    flex: 1 1 auto;
    width: 100%;
    min-width: auto;
  }

  .search-input {
    border-radius: 999px;
    background: #f9fafb;
    padding: 10px 16px;
  }

  .filter-select {
    width: 100%;
    flex: 1 1 auto;
  }

  .filters-box .btn {
    width: 100%;
    justify-content: center;
  }

  .cursos-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .results-info {
    font-size: 0.8rem;
    padding: 8px 0;
  }

  .pagination {
    gap: 4px;
  }

  .pagination a,
  .pagination span {
    min-width: 30px;
    height: 30px;
    font-size: 0.78rem;
  }
}

@media (max-width: 480px) {
  .catalogo-hero {
    padding: 20px 0;
  }

  .catalogo-hero h1 {
    font-size: 1.2rem;
    gap: 8px;
  }

  .catalogo-hero h1 i {
    font-size: 1.3rem;
  }

  .curso-imagen {
    height: 160px;
  }

  .curso-card .badge-featured,
  .curso-card .badge-modalidad {
    font-size: 0.6rem;
    padding: 3px 8px;
  }

  .curso-precio-badge {
    font-size: 0.7rem;
    padding: 4px 10px;
  }
}


/* ============================================
   ANIMACIONES
============================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.curso-card {
  animation: fadeInUp 0.4s ease-out backwards;
}

.curso-card:nth-child(n) {
  animation-delay: calc(0.05s * var(--i, 0));
}


/* ============================================
   ACCESIBILIDAD
============================================ */

.btn:focus-visible,
.curso-card:focus-visible,
.search-input:focus-visible,
.filter-select:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}


/* ============================================
   PRINT
============================================ */

@media print {
  .filters-section,
  .pagination,
  .catalogo-hero {
    display: none;
  }
  
  .cursos-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}