.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
  padding: 1rem 2vw 2rem 2vw;
  max-width: 1200px;
  margin: 0 auto;
  background: var(--bg-color);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1.5px solid var(--bg-color);
  will-change: contents;
  contain: layout style;
}

.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background: var(--bg-color);
  cursor: pointer;
  border: 1.5px solid var(--accent);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  will-change: transform;
  contain: layout style paint;
  aspect-ratio: 4/3;
  min-height: 200px;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: filter var(--transition), transform var(--transition), opacity 0.3s ease;
  background: var(--bg-color);
  will-change: transform, filter;
  backface-visibility: hidden;
  transform: translateZ(0);
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
  image-rendering: pixelated;
  position: relative;
  z-index: 0;
  filter: contrast(1.05) brightness(1.02);
}

/* Loading state styles */
.gallery-item.loading {
  position: relative;
  overflow: hidden;
}

.gallery-item.loading img {
  opacity: 0;
}

.image-placeholder {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: inherit;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 500;
}

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

.gallery-item .overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(0deg, rgba(102,102,102,0.92) 80%, rgba(102,102,102,0.1) 100%);
  color: var(--text);
  padding: 1rem;
  opacity: 0;
  transition: opacity var(--transition);
  font-size: 1.1rem;
  pointer-events: none;
  z-index: 2;
}

.gallery-item:hover, .gallery-item:focus {
  transform: scale(1.05);
  box-shadow: 0 8px 32px rgba(0,0,0,0.15);
  border-color: var(--text);
  z-index: 2;
}

.gallery-item:hover img, .gallery-item:focus img {
  filter: brightness(1.08) saturate(1.1);
}

.gallery-item:hover .overlay, .gallery-item:focus .overlay {
  opacity: 1;
}

.gallery-download-btn {
  position: absolute;
  bottom: 1rem;
  right: 1rem;
  background: var(--bg-color);
  color: var(--text);
  border: 2px solid var(--accent);
  border-radius: 50%;
  width: 2.2rem;
  height: 2.2rem;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.10);
  cursor: pointer;
  transition: opacity var(--transition), background var(--transition), color var(--transition), border var(--transition);
  z-index: 3;
}

.gallery-item:hover .gallery-download-btn, .gallery-item:focus .gallery-download-btn {
  opacity: 1;
}

.gallery-download-btn:hover, .gallery-download-btn:focus {
  background: var(--accent);
  color: var(--bg-light);
  border-color: var(--accent);
}

/* Performance optimizations */
.gallery-item img {
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  .gallery-item,
  .gallery-item img,
  .gallery-item .overlay,
  .gallery-download-btn {
    transition: none;
  }
  
  .image-placeholder {
    animation: none;
  }
}

/* Optimize for different screen sizes */
@media (max-width: 1200px) {
  .gallery {
    grid-template-columns: repeat(2, 1fr);
  }
  .gallery-item {
    aspect-ratio: 3/2;
    min-height: 180px;
  }
}

@media (max-width: 768px) {
  .gallery {
    grid-template-columns: 1fr;
  }
  .gallery-item {
    aspect-ratio: 16/9;
    min-height: 200px;
  }
}

@media (max-width: 480px) {
  .gallery {
    padding: 0.5rem 1vw 1rem 1vw;
  }
  .gallery-item {
    aspect-ratio: 4/3;
    min-height: 160px;
  }
}