/* Masonry grid */
.masonry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.masonry-grid.compact {
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}
.masonry-item {
  border-radius: 12px;
  overflow: hidden;
  position: relative;
}
.masonry-item .img-skeleton {
  aspect-ratio: 1;
  background: linear-gradient(110deg, #f0f0f0 8%, #e8e8e8 18%, #f0f0f0 33%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s linear infinite;
  border-radius: 12px;
}
@media (max-width: 1400px) {
  .masonry-grid { grid-template-columns: repeat(3, 1fr); }
  .masonry-grid.compact { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 1024px) {
  .masonry-grid { grid-template-columns: repeat(2, 1fr); }
  .masonry-grid.compact { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 640px) {
  .masonry-grid { grid-template-columns: repeat(1, 1fr); }
  .masonry-grid.compact { grid-template-columns: repeat(2, 1fr); }
}

/* Masonry image hover */
.masonry-item .hover-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.6) 0%, transparent 50%);
  opacity: 0;
  transition: opacity 0.2s ease;
}
.masonry-item:hover .hover-overlay {
  opacity: 1;
}
.masonry-item .hover-actions {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 12px;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  opacity: 0;
  transform: translateY(4px);
  transition: all 0.2s ease;
}
.masonry-item:hover .hover-actions {
  opacity: 1;
  transform: translateY(0);
}
.masonry-item .select-check {
  position: absolute;
  top: 8px;
  left: 8px;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  border: 2px solid rgba(255,255,255,0.6);
  background: rgba(0,0,0,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.15s ease;
  cursor: pointer;
}
.masonry-item:hover .select-check,
.masonry-item .select-check.checked {
  opacity: 1;
}
.masonry-item .select-check.checked {
  background: #4d65ff;
  border-color: #4d65ff;
}

/* Lightbox */
.lightbox-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.9);
  z-index: 60;
  display: flex;
}
.lightbox-image-area {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  position: relative;
}
.lightbox-image-area img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 8px;
}
.lightbox-sidebar {
  width: 320px;
  background: #1e1e1e;
  border-left: 1px solid #333;
  padding: 24px;
  overflow-y: auto;
  color: #fff;
}
.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s ease;
}
.lightbox-nav:hover {
  background: rgba(255,255,255,0.2);
}

/* Inpaint canvas overlay */
.inpaint-canvas-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}
.inpaint-canvas-container canvas {
  pointer-events: all;
  border-radius: 8px;
  cursor: crosshair;
}

/* Checkered transparency background for lightbox images */
.bg-checker {
  background-image:
    linear-gradient(45deg, #e0e0e0 25%, transparent 25%),
    linear-gradient(-45deg, #e0e0e0 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #e0e0e0 75%),
    linear-gradient(-45deg, transparent 75%, #e0e0e0 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
}