/* Collage maker layout */
.collage-app {
  display: flex;
  gap: 1rem;
  height: calc(100vh - 220px);
  min-height: 520px;
  margin-bottom: 2rem;
}

/* Sidebar */
.collage-sidebar {
  flex: 0 0 300px;
  display: flex;
  flex-direction: column;
  background: var(--color-paper-3, #fafafa);
  border: 1px solid var(--color-rule, #e5e5e5);
  border-radius: var(--radius-sm, 8px);
  padding: 0.85rem;
  overflow: hidden;
}

.collage-sidebar-title {
  margin: 0 0 0.6rem;
  font-weight: 600;
}

.collage-hint {
  font-size: 0.78rem;
  color: #777;
  margin: 0.25rem 0 0.6rem;
}

#collage-results {
  overflow-y: auto;
  flex: 1 1 auto;
  margin: 0 -0.25rem;
  padding: 0 0.25rem;
}

.collage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.4rem;
}

.collage-thumb {
  aspect-ratio: 1 / 1;
  background: var(--color-paper-2, #fff);
  border: 1px solid var(--color-rule, #e2e2e2);
  border-radius: 6px;
  overflow: hidden;
  cursor: grab;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: box-shadow .15s ease, transform .15s ease;
}

.collage-thumb:hover {
  box-shadow: 0 0 0 2px var(--color-accent-ring, rgba(197,59,46,.35));
  transform: translateY(-1px);
}

.collage-thumb:active { cursor: grabbing; }

.collage-thumb img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  pointer-events: none;
}

.collage-pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.6rem 0 0.2rem;
}

.collage-pageinfo { font-size: 0.8rem; color: #555; }

/* Main editor */
.collage-main {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.collage-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: 0 0 0.75rem;
}

.collage-bg-control,
.collage-size-control {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.collage-bg-control input[type=color] {
  width: 34px;
  height: 30px;
  padding: 2px;
  border: 1px solid #ccc;
  border-radius: 4px;
  background: #fff;
}

/* Stage: canvas + layers panel side by side */
.collage-stage {
  flex: 1 1 auto;
  display: flex;
  gap: 1rem;
  min-height: 0;
}

.collage-canvas-wrap {
  flex: 1 1 auto;
  background:
    repeating-conic-gradient(#f0f0f0 0% 25%, #ffffff 0% 50%) 50% / 24px 24px;
  border: 1px solid var(--color-rule, #e5e5e5);
  border-radius: var(--radius-sm, 8px);
  overflow: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

/* Fabric injects its own wrapper; keep the canvas centered */
.collage-canvas-wrap .canvas-container {
  box-shadow: 0 4px 20px rgba(0,0,0,.12);
}

.collage-canvas-wrap.dragover {
  outline: 3px dashed var(--color-accent-wash, rgba(197,59,46,.5));
  outline-offset: -6px;
}

/* Layers panel */
.collage-layers {
  flex: 0 0 210px;
  display: flex;
  flex-direction: column;
  background: var(--color-paper-3, #fafafa);
  border: 1px solid var(--color-rule, #e5e5e5);
  border-radius: var(--radius-sm, 8px);
  padding: 0.75rem;
  overflow: hidden;
}

.collage-layers-title {
  margin: 0 0 0.15rem;
  font-weight: 600;
}

.collage-layer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-y: auto;
  flex: 1 1 auto;
}

.collage-layer-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.4rem;
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  margin-bottom: 0.25rem;
  background: #fff;
  transition: border-color .12s ease, background .12s ease;
}

.collage-layer-item:hover { background: var(--color-accent-wash-weak, #f0f6ff); }

.collage-layer-item.active {
  border-color: var(--color-accent, #0d6efd);
  background: var(--color-accent-tint, #e7f1ff);
}

.collage-layer-thumb {
  flex: 0 0 32px;
  width: 32px;
  height: 32px;
  object-fit: contain;
  background: #fff;
  border: 1px solid #e2e2e2;
  border-radius: 4px;
}

.collage-layer-name {
  flex: 1 1 auto;
  font-size: 0.78rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.collage-layer-del {
  flex: 0 0 auto;
  border: none;
  background: none;
  color: #b02a37;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  padding: 0 0.15rem;
  opacity: 0.6;
}

.collage-layer-del:hover { opacity: 1; }

.collage-layers-empty {
  font-size: 0.78rem;
  color: #999;
  padding: 0.5rem 0.2rem;
}

/* Placeholder row shown while an image is still loading */
.collage-layer-item-pending {
  cursor: default;
}

.collage-layer-item-pending:hover { background: #fff; }

.collage-layer-thumb-pending {
  position: relative;
  overflow: hidden;
  background: #f0f0f0;
}

.collage-layer-thumb-pending::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg,
    rgba(255,255,255,0) 0%,
    rgba(255,255,255,0.65) 50%,
    rgba(255,255,255,0) 100%);
  transform: translateX(-100%);
  animation: collage-shimmer 1.1s ease-in-out infinite;
}

.collage-layer-pending-body {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.collage-layer-pending-body .collage-layer-name {
  color: #888;
}

.collage-layer-progress {
  position: relative;
  display: block;
  height: 4px;
  border-radius: 3px;
  background: #e5e5e5;
  overflow: hidden;
}

.collage-layer-progress-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 40%;
  border-radius: 3px;
  background: var(--color-accent, #c53b2e);
  animation: collage-indeterminate 1.1s ease-in-out infinite;
}

@keyframes collage-shimmer {
  100% { transform: translateX(100%); }
}

@keyframes collage-indeterminate {
  0%   { left: -40%; }
  100% { left: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .collage-layer-thumb-pending::after,
  .collage-layer-progress-fill {
    animation-duration: 2.2s;
  }
}

/* Responsive: stack on small screens */
@media (max-width: 900px) {
  .collage-app {
    flex-direction: column;
    height: auto;
  }
  .collage-sidebar {
    flex: none;
    max-height: 320px;
  }
  .collage-stage {
    flex-direction: column;
  }
  .collage-layers {
    flex: none;
    max-height: 200px;
  }
  .collage-canvas-wrap { min-height: 60vh; }
}