/* ==========================================================================
   components/gallery.css  —  Photo Grid & Lightbox
   ========================================================================== */

/* ── Gallery Grid ─────────────────────────────────────────────────────── */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-3);
}

/* Masonry-feel: alternate tall items */
.gallery-grid .gallery-item:nth-child(5n + 2) {
  grid-row: span 2;
}

/* Preview mode — max 6 items, no masonry */
.gallery-grid--preview {
  grid-template-columns: repeat(3, 1fr);
}

.gallery-grid--preview .gallery-item:nth-child(n) {
  grid-row: span 1;
}

/* ── Gallery Item ─────────────────────────────────────────────────────── */
.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background-color: var(--color-gray-200);
  cursor: pointer;
  aspect-ratio: 4 / 3;
}

/* Tall variant (masonry) */
.gallery-item--tall {
  aspect-ratio: 3 / 4;
}

.gallery-item picture,
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
  display: block;
}

/* Hover overlay */
.gallery-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0);
  transition: background var(--transition-base);
}

.gallery-item:hover::after {
  background: rgba(0,0,0,0.3);
}

.gallery-item:hover img {
  transform: scale(1.05);
}

/* Caption */
.gallery-item figcaption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-4);
  background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
  color: var(--color-white);
  font-size: var(--text-sm);
  transform: translateY(100%);
  transition: transform var(--transition-base);
  z-index: var(--z-raised);
}

.gallery-item:hover figcaption {
  transform: translateY(0);
}

/* ── Filter Tabs ──────────────────────────────────────────────────────── */
.gallery-filter {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
  margin-bottom: var(--space-8);
}

.filter-btn {
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-light);
  background: var(--color-gray-100);
  border: 1px solid var(--color-border);
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast);
  cursor: pointer;
}

.filter-btn:hover {
  color: var(--color-brand-primary);
  border-color: var(--color-brand-primary);
}

.filter-btn.is-active {
  background-color: var(--color-brand-primary);
  color: var(--color-white);
  border-color: var(--color-brand-primary);
}

/* ── Load More ────────────────────────────────────────────────────────── */
.gallery-load-more {
  text-align: center;
  margin-top: var(--space-10);
}

/* ── Lightbox ─────────────────────────────────────────────────────────── */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background: rgba(0,0,0,0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
}

.lightbox[hidden] {
  display: none;
}

.lightbox-figure {
  position: relative;
  max-width: min(90vw, 1200px);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

.lightbox-figure picture,
#lightbox-img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-md);
}

#lightbox-caption {
  color: rgba(255,255,255,0.75);
  font-size: var(--text-sm);
  text-align: center;
}

/* Nav buttons */
.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: fixed;
  background: rgba(255,255,255,0.12);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition-fast);
  backdrop-filter: blur(4px);
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
  background: rgba(255,255,255,0.25);
}

.lightbox-close {
  top: var(--space-4);
  right: var(--space-4);
  width: 44px;
  height: 44px;
  font-size: var(--text-lg);
}

.lightbox-prev,
.lightbox-next {
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  font-size: var(--text-xl);
}

.lightbox-prev { left: var(--space-4); }
.lightbox-next { right: var(--space-4); }

/* ── Skeleton loader ──────────────────────────────────────────────────── */
.gallery-item--skeleton {
  background: linear-gradient(
    90deg,
    var(--color-gray-200) 25%,
    var(--color-gray-100) 50%,
    var(--color-gray-200) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s infinite;
  cursor: default;
}

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

/* ── Mobile ───────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .gallery-grid--preview {
    grid-template-columns: repeat(2, 1fr);
  }

  .gallery-grid .gallery-item:nth-child(5n + 2) {
    grid-row: span 1;
  }

  .lightbox-prev { left: var(--space-2); }
  .lightbox-next { right: var(--space-2); }
}

@media (max-width: 480px) {
  .gallery-grid,
  .gallery-grid--preview {
    grid-template-columns: 1fr;
  }
}