/* ============================================
   Gallery Page — Masonry grid for mixed orientations
   Optimized for both landscape and portrait images
   ============================================ */

.page-gallery {
  padding-top: 0;
}

/* ========== Gallery Header ========== */
.gallery-page {
  padding: 8rem 3rem 6rem;
  max-width: 1400px;
  margin: 0 auto;
}

.gallery-header {
  text-align: center;
  margin-bottom: 4rem;
}

.gallery-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.gallery-subtitle {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 2rem;
}

/* ========== Category Filters ========== */
.gallery-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.filter-btn {
  padding: 0.65rem 1.5rem;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.15);
  cursor: pointer;
  transition: color var(--transition-base), border-color var(--transition-base),
    background var(--transition-base);
}

.filter-btn:hover {
  color: var(--color-accent);
  border-color: rgba(201, 169, 98, 0.4);
}

.filter-btn.active {
  color: var(--color-bg);
  background: var(--color-accent);
  border-color: var(--color-accent);
}

/* ========== Masonry Grid ========== */
/* CSS Grid with fixed row height - landscape spans 1 row, portrait spans 2 */
.gallery-masonry {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  grid-auto-rows: 220px;
  gap: 1.25rem;
  grid-auto-flow: dense;
}

.gallery-masonry.loading,
.gallery-masonry.error {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
}

.gallery-state-message {
  color: var(--color-text-muted);
  font-size: 1rem;
  margin: 0;
}

.gallery-masonry.error .gallery-state-message {
  color: var(--color-accent);
}

/* Sentinel for infinite scroll (cursor pagination) */
.gallery-load-more {
  grid-column: 1 / -1;
  height: 1px;
  min-height: 1px;
  visibility: hidden;
  pointer-events: none;
}

.gallery-card {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  break-inside: avoid;
}

/* Landscape orientation: wider than tall — span 1 row */
.gallery-card.orientation-landscape {
  grid-row: span 1;
}

.gallery-card.orientation-landscape img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

/* Portrait orientation: taller than wide — span 2 rows */
.gallery-card.orientation-portrait {
  grid-row: span 2;
}

.gallery-card.orientation-portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

/* Image styling */
.gallery-card img {
  transition: transform var(--transition-slow);
  display: block;
}

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

/* Card overlay */
.gallery-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13, 13, 13, 0.85), transparent 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.5rem;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.gallery-card:hover .gallery-card-overlay {
  opacity: 1;
}

.gallery-card-category {
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.35rem;
}

.gallery-card-overlay h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0;
}

/* Hide filtered items with animation */
.gallery-card.hidden {
  display: none;
  animation: fadeOut 0.3s ease-out forwards;
}

.gallery-card.visible {
  display: block;
  animation: fadeIn 0.5s var(--ease-out-expo) forwards;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: scale(0.98);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes fadeOut {
  to {
    opacity: 0;
  }
}

/* ========== Lightbox / Image Popup ========== */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.95);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.lightbox.open {
  opacity: 1;
  visibility: visible;
}

.lightbox-close {
  position: absolute;
  top: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: 300;
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  cursor: pointer;
  transition: background var(--transition-base), color var(--transition-base),
    border-color var(--transition-base);
}

.lightbox-close:hover {
  background: var(--color-accent);
  color: var(--color-bg);
  border-color: var(--color-accent);
}

.lightbox-content {
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.lightbox-img {
  max-width: 100%;
  max-height: 85vh;
  width: auto;
  height: auto;
  object-fit: contain;
}

.lightbox-caption {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
}

body.lightbox-open {
  overflow: hidden;
}

/* ========== Responsive ========== */
@media (max-width: 1200px) {
  .gallery-masonry {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    grid-auto-rows: 200px;
  }
}

@media (max-width: 768px) {
  .gallery-page {
    padding: 6rem 1.5rem 4rem;
  }

  .gallery-header {
    margin-bottom: 2.5rem;
  }

  .gallery-filters {
    gap: 0.5rem;
  }

  .filter-btn {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
  }

  .gallery-masonry {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 160px;
    gap: 0.75rem;
  }

  /* Smaller row height for portrait on mobile */
  .gallery-card.orientation-portrait {
    grid-row: span 2;
  }

  .gallery-card-overlay h3 {
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .gallery-masonry {
    grid-template-columns: 1fr;
    grid-auto-rows: 240px;
  }

  .gallery-card.orientation-portrait {
    grid-row: span 2;
  }
}