/* ============================================
   Art Gallery - Gallery Styles
   ============================================
   Gallery grid, artwork cards, pagination
   ============================================ */

/* ===== GALLERY GRID ===== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin: 0 auto;
  max-width: 1200px;
  padding: 0 16px;
}

.density-regular .grid {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.density-compact .grid {
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

.density-large .grid {
  grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
}

/* ===== ARTWORK CARDS ===== */
.card {
  background: var(--muted-panel);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  overflow: hidden;
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              box-shadow 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  cursor: pointer;
  position: relative;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 0 1px var(--card-border);
}

.card .imgwrap {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--muted);
}

.card .img-placeholder {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--muted) 25%, transparent 50%, var(--muted) 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
}

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

.card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

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

.card img.loaded {
  opacity: 1;
}

/* ===== SKELETON LOADING ===== */
.card.skeleton .imgwrap {
  background: linear-gradient(90deg, var(--muted-panel) 25%, var(--surface) 50%, var(--muted-panel) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
}

.card.skeleton .card-body {
  background: var(--muted-panel);
  border-radius: 4px;
  animation: skeleton-loading 1.5s infinite;
}

.card .card-body-skeleton {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--muted-panel);
  border-radius: 4px;
  animation: skeleton-loading 1.5s infinite;
  pointer-events: none;
}

.card.loaded .card-body-skeleton {
  display: none;
}

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

/* ===== STAGGERED FADE-IN ANIMATION ===== */
.card.fade-in {
  animation: fadeInUp 0.6s ease-out forwards;
  opacity: 0;
  transform: translateY(20px);
}

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

.card .tag-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 4px 8px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}

.card .alt-counter {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0, 0, 0, 0.8);
  color: #ffffff;
  padding: 6px 10px;
  border-radius: 16px;
  font-size: 13px;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(4px);
}

.card .card-body {
  padding: 16px;
}

.card .title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 4px 0;
  line-height: 1.4;
}

.card .meta {
  font-size: 14px;
  color: var(--muted);
  margin: 0 0 8px 0;
}

.card .desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0;
}

/* ===== MOBILE OPTIMIZATIONS ===== */
@media (max-width: 768px) {
  .card {
    min-height: 200px;
  }

  .pager-btn {
    min-height: 44px;
    min-width: 44px;
  }

  .custom-select-button {
    min-height: 44px;
  }

  .tag-btn {
    min-height: 36px;
    padding: 8px 12px;
  }
}

/* ===== LAYOUT SHIFT PREVENTION ===== */
/* Reserve space for gallery header to prevent layout shifts */
.gallery-header {
  min-height: 60px; /* Reserve space for header content */
  margin-bottom: 24px;
}

.gallery-info {
  min-height: 24px; /* Reserve space for count and page info */
}

.gallery-controls {
  min-height: 40px; /* Reserve space for controls */
}

/* Reserve space for pagination to prevent layout shifts */
.pager {
  min-height: 48px; /* Reserve space for pagination controls */
}

/* ===== ENHANCED EMPTY STATES ===== */
.empty {
  text-align: center;
  padding: 60px 20px;
  max-width: 400px;
  margin: 0 auto;
}

.empty-icon {
  font-size: 64px;
  margin-bottom: 20px;
  opacity: 0.6;
}

.empty h3 {
  margin: 0 0 12px 0;
  color: var(--text);
  font-size: 20px;
  font-weight: 600;
}

.empty p {
  margin: 0 0 24px 0;
  color: var(--muted);
  line-height: 1.5;
}

.clear-all-btn {
  margin-top: 20px;
  padding: 12px 24px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s ease;
}

.clear-all-btn:hover {
  background: var(--accent);
  opacity: 0.9;
  transform: translateY(-1px);
}

/* ===== PAGINATION ===== */
.pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin: 32px 0;
  flex-wrap: wrap;
}

.pager-btn {
  padding: 8px 16px;
  border: 1px solid var(--card-border);
  background: var(--muted-panel);
  color: var(--text);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 14px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.pager-btn:hover:not(:disabled) {
  background: var(--hover);
  border-color: var(--accent);
}

.pager-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pager-arrow {
  font-size: 18px;
  font-weight: bold;
}

.pager .info {
  font-size: 14px;
  color: var(--muted);
  min-width: 100px;
  text-align: center;
}

.pager-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pager input[type="number"] {
  width: 60px;
  padding: 6px 8px;
  border: 1px solid var(--card-border);
  border-radius: 6px;
  background: var(--muted-panel);
  color: var(--text);
  text-align: center;
  font-size: 14px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

/* ===== EMPTY STATE ===== */
.empty {
  text-align: center;
  padding: 64px 16px;
  color: var(--muted);
}

.empty p {
  margin: 0 0 16px 0;
  font-size: 16px;
}

.empty p:last-child {
  font-size: 14px;
  opacity: 0.8;
}

.card img.loaded ~ .img-placeholder {
  display: none;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .density-compact .grid {
    grid-template-columns: 1fr;
  }
  .density-regular .grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
  .density-large .grid {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  }

  .card .card-body {
    padding: 12px;
  }

  .card .title {
    font-size: 15px;
  }

  .pager {
    gap: 8px;
  }
}

@media (max-width: 480px) {
  .grid {
    gap: 16px;
  }

  .pager {
    flex-direction: column;
    gap: 12px;
  }

  .pager-controls {
    flex-direction: column;
    width: 100%;
  }
}

@media (max-width: 414px) {
  .grid {
    gap: 12px;
  }

  .card .card-body {
    padding: 10px;
  }

  .card .title {
    font-size: 14px;
  }
}

@media (max-width: 375px) {
  .grid {
    gap: 10px;
  }
}

@media (max-width: 320px) {
  .grid {
    gap: 8px;
  }

  .card .card-body {
    padding: 8px;
  }
}