/**
 * Landing Galería - Estilos para la sección de galería de eventos
 * Colores institucionales: Navy (#1a365d) y Gold (#c9a227)
 */

/* ============================================
   VARIABLES CSS
   ============================================ */
:root {
  --galeria-navy: #1a365d;
  --galeria-navy-dark: #0f172a;
  --galeria-navy-light: #2c5282;
  --galeria-gold: #c9a227;
  --galeria-gold-light: #d4af37;
  --galeria-gold-dark: #a88420;
  --galeria-white: #ffffff;
  --galeria-gray-100: #f7fafc;
  --galeria-gray-200: #edf2f7;
  --galeria-gray-600: #718096;
  --galeria-gray-800: #2d3748;
  --galeria-overlay: rgba(26, 54, 93, 0.85);
  --galeria-backdrop: rgba(15, 23, 42, 0.95);
  --galeria-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --galeria-shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --galeria-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   SECCIÓN GALERÍA
   ============================================ */
.galeria-section {
  padding: 5rem 0;
  background: linear-gradient(180deg, var(--galeria-gray-100) 0%, var(--galeria-white) 100%);
}

.galeria-header {
  text-align: center;
  margin-bottom: 3rem;
}

.galeria-header__title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--galeria-navy);
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}

.galeria-header__title::after {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--galeria-gold), var(--galeria-gold-dark));
  border-radius: 2px;
}

.galeria-header__subtitle {
  font-size: 1.125rem;
  color: var(--galeria-gray-600);
  max-width: 600px;
  margin: 1.5rem auto 0;
  line-height: 1.7;
}

/* ============================================
   GRID MASONRY
   ============================================ */
.galeria-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 200px;
  gap: 1rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Clases de tamaño para items */
.galeria-item {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: var(--galeria-shadow);
  transition: var(--galeria-transition);
  will-change: transform, box-shadow;
  background-color: var(--galeria-gray-200);
}

.galeria-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--galeria-shadow-lg);
}

.galeria-item.small {
  grid-row: span 1;
  grid-column: span 1;
}

.galeria-item.medium {
  grid-row: span 2;
  grid-column: span 1;
}

.galeria-item.large {
  grid-row: span 2;
  grid-column: span 2;
}

.galeria-item.wide {
  grid-row: span 1;
  grid-column: span 2;
}

/* ============================================
   IMÁGENES Y OVERLAY
   ============================================ */
.galeria-item__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.galeria-item:hover .galeria-item__image {
  transform: scale(1.1);
}

.galeria-item__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    var(--galeria-overlay) 0%,
    rgba(26, 54, 93, 0.4) 50%,
    transparent 100%
  );
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.5rem;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.galeria-item:hover .galeria-item__overlay {
  opacity: 1;
}

.galeria-item__content {
  transform: translateY(20px);
  transition: transform 0.3s ease;
}

.galeria-item:hover .galeria-item__content {
  transform: translateY(0);
}

.galeria-item__title {
  color: var(--galeria-white);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.galeria-item__description {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.875rem;
  line-height: 1.5;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.galeria-item__icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  width: 60px;
  height: 60px;
  background: var(--galeria-gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
  box-shadow: 0 4px 15px rgba(201, 162, 39, 0.4);
}

.galeria-item:hover .galeria-item__icon {
  transform: translate(-50%, -50%) scale(1);
}

.galeria-item__icon svg {
  width: 24px;
  height: 24px;
  color: var(--galeria-navy);
}

/* ============================================
   LAZY LOADING PLACEHOLDER
   ============================================ */
.galeria-item__placeholder {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    var(--galeria-gray-200) 25%,
    var(--galeria-gray-100) 50%,
    var(--galeria-gray-200) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

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

.galeria-item__image.loaded + .galeria-item__placeholder {
  display: none;
}

/* ============================================
   LIGHTBOX
   ============================================ */
.galeria-lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--galeria-backdrop);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.galeria-lightbox.active {
  opacity: 1;
  visibility: visible;
}

.galeria-lightbox__backdrop {
  position: absolute;
  inset: 0;
  cursor: pointer;
}

.galeria-lightbox__container {
  position: relative;
  z-index: 1;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.galeria-lightbox__image-wrapper {
  position: relative;
  max-width: 100%;
  max-height: 70vh;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.galeria-lightbox__image {
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
  display: block;
}

.galeria-lightbox__caption {
  text-align: center;
  margin-top: 1.5rem;
  padding: 0 2rem;
  max-width: 800px;
}

.galeria-lightbox__title {
  color: var(--galeria-white);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.galeria-lightbox__description {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1rem;
  line-height: 1.6;
}

.galeria-lightbox__counter {
  position: absolute;
  top: 2rem;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: 0.5rem 1.5rem;
  border-radius: 9999px;
  color: var(--galeria-white);
  font-size: 0.875rem;
  font-weight: 500;
}

/* ============================================
   BOTONES DEL LIGHTBOX
   ============================================ */
.galeria-lightbox__btn {
  position: absolute;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--galeria-white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--galeria-transition);
  border-radius: 50%;
  will-change: transform, background;
}

.galeria-lightbox__btn:hover {
  background: var(--galeria-gold);
  border-color: var(--galeria-gold);
  color: var(--galeria-navy);
  transform: scale(1.1);
}

.galeria-lightbox__btn:focus-visible {
  outline: 2px solid var(--galeria-gold);
  outline-offset: 2px;
}

.galeria-lightbox__btn--close {
  top: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
}

.galeria-lightbox__btn--prev,
.galeria-lightbox__btn--next {
  top: 50%;
  transform: translateY(-50%);
  width: 60px;
  height: 60px;
}

.galeria-lightbox__btn--prev {
  left: 2rem;
}

.galeria-lightbox__btn--next {
  right: 2rem;
}

.galeria-lightbox__btn--prev:hover,
.galeria-lightbox__btn--next:hover {
  transform: translateY(-50%) scale(1.1);
}

.galeria-lightbox__btn svg {
  width: 24px;
  height: 24px;
}

/* ============================================
   ANIMACIONES
   ============================================ */
.galeria-lightbox__image-wrapper {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.galeria-lightbox.active .galeria-lightbox__image-wrapper {
  opacity: 1;
  transform: scale(1);
}

/* Animación de carga de imagen */
.galeria-lightbox__image {
  opacity: 0;
  transition: opacity 0.3s ease;
}

.galeria-lightbox__image.loaded {
  opacity: 1;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .galeria-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 180px;
  }
  
  .galeria-item.large {
    grid-column: span 2;
  }
  
  .galeria-item.wide {
    grid-column: span 2;
  }
}

@media (max-width: 768px) {
  .galeria-section {
    padding: 3rem 0;
  }
  
  .galeria-header__title {
    font-size: 2rem;
  }
  
  .galeria-header__subtitle {
    font-size: 1rem;
    padding: 0 1rem;
  }
  
  .galeria-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: 250px;
    gap: 0.75rem;
  }
  
  .galeria-item.small,
  .galeria-item.medium,
  .galeria-item.large,
  .galeria-item.wide {
    grid-row: span 1;
    grid-column: span 1;
  }
  
  .galeria-item__overlay {
    opacity: 1;
    background: linear-gradient(
      to top,
      var(--galeria-overlay) 0%,
      rgba(26, 54, 93, 0.6) 40%,
      transparent 70%
    );
  }
  
  .galeria-item__content {
    transform: translateY(0);
  }
  
  .galeria-item__icon {
    display: none;
  }
  
  /* Lightbox mobile */
  .galeria-lightbox__btn--close {
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
  }
  
  .galeria-lightbox__btn--prev,
  .galeria-lightbox__btn--next {
    width: 44px;
    height: 44px;
  }
  
  .galeria-lightbox__btn--prev {
    left: 0.5rem;
  }
  
  .galeria-lightbox__btn--next {
    right: 0.5rem;
  }
  
  .galeria-lightbox__counter {
    top: 1rem;
    padding: 0.375rem 1rem;
    font-size: 0.75rem;
  }
  
  .galeria-lightbox__title {
    font-size: 1.125rem;
  }
  
  .galeria-lightbox__description {
    font-size: 0.875rem;
  }
}

@media (max-width: 480px) {
  .galeria-header__title {
    font-size: 1.75rem;
  }
  
  .galeria-grid {
    grid-auto-rows: 200px;
    padding: 0 0.75rem;
  }
  
  .galeria-item__title {
    font-size: 1rem;
  }
  
  .galeria-item__description {
    font-size: 0.75rem;
  }
}

/* ============================================
   ACCESIBILIDAD
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  .galeria-item,
  .galeria-item__image,
  .galeria-item__overlay,
  .galeria-item__content,
  .galeria-item__icon,
  .galeria-lightbox,
  .galeria-lightbox__image-wrapper,
  .galeria-lightbox__image,
  .galeria-lightbox__btn {
    transition: none;
    animation: none;
  }
  
  .galeria-item:hover {
    transform: none;
  }
  
  .galeria-item:hover .galeria-item__image {
    transform: none;
  }
  
  .galeria-item__placeholder {
    animation: none;
    background: var(--galeria-gray-200);
  }
}

/* Foco visible para navegación por teclado */
.galeria-item:focus-visible {
  outline: 3px solid var(--galeria-gold);
  outline-offset: 3px;
}

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

/* ARIA live region */
.galeria-live-region {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}