/* =========================================================
   shape-library-items.css
   Responsibility: ShapeLibraryItemsContainer grid layout,
   DraggableShapeLibraryItem visual states (default, hover,
   dragging), drag ghost preview card, and items empty state.
   Phase Coverage: 1.2, 1.3
   ========================================================= */

/* ── Items Container ─────────────────────────────────────── */
#ShapeLibraryItemsContainer {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 8px;
  min-height: 0;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

#ShapeLibraryItemsContainer::-webkit-scrollbar {
  width: 3px;
}

#ShapeLibraryItemsContainer::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}

/* ── Items Grid ──────────────────────────────────────────── */
.items-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 5px;
  animation: fadeItemsIn 0.2s ease;
}

@keyframes fadeItemsIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Draggable Shape Item ────────────────────────────────── */
.DraggableShapeLibraryItem {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 10px 5px 8px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: grab;
  transition:
    background  var(--t-fast),
    border-color var(--t-fast),
    transform   var(--t-fast),
    box-shadow  var(--t-fast);
  position: relative;
  user-select: none;
  gap: 5px;
  min-height: 70px;
  outline: none;
  overflow: hidden;
}

/* Subtle top shine */
.DraggableShapeLibraryItem::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.DraggableShapeLibraryItem:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.DraggableShapeLibraryItem:focus-visible {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px var(--color-accent-glow);
}

/* Active drag source — visual feedback SOURCE stays in place */
.DraggableShapeLibraryItem.dragging {
  cursor: grabbing;
  border-color: var(--color-accent);
  background: var(--color-accent-glow);
  transform: scale(0.95);
  opacity: 0.5;
  box-shadow: var(--shadow-accent);
}

/* ── Shape Icon ──────────────────────────────────────────── */
.shape-item-icon {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  flex-shrink: 0;
}

.shape-item-icon svg {
  width: 34px;
  height: 34px;
  transition: transform var(--t-fast);
}

.DraggableShapeLibraryItem:hover .shape-item-icon svg {
  transform: scale(1.08);
}

/* ── Shape Label ─────────────────────────────────────────── */
.shape-item-label {
  font-size: 10px;
  font-weight: 500;
  color: var(--color-text-muted);
  text-align: center;
  line-height: 1.25;
  pointer-events: none;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 0 2px;
  transition: color var(--t-fast);
}

.DraggableShapeLibraryItem:hover .shape-item-label {
  color: var(--color-text-secondary);
}

/* ── Items Empty State ───────────────────────────────────── */
.items-empty-state {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 36px 14px;
  gap: 10px;
  color: var(--color-text-muted);
  text-align: center;
  animation: fadeIn 0.25s ease;
}

.items-empty-state svg {
  opacity: 0.25;
  flex-shrink: 0;
}

.items-empty-state p {
  font-size: 12px;
  line-height: 1.55;
  max-width: 160px;
  color: var(--color-text-muted);
}

/* ── Drag Ghost Card ─────────────────────────────────────── */
.drag-ghost-card {
  background: var(--color-surface-active);
  border: 1.5px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 8px 14px 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  min-width: 70px;
  box-shadow: var(--shadow-accent), var(--shadow-lg);
  animation: ghostAppear 0.1s ease;
  pointer-events: none;
}

@keyframes ghostAppear {
  from { opacity: 0; transform: scale(0.9) translate(-50%, -50%); }
  to   { opacity: 0.9; transform: scale(1) translate(-50%, -50%); }
}

.drag-ghost-icon {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.drag-ghost-label {
  font-size: 10px;
  font-weight: 500;
  color: var(--color-text-accent);
  white-space: nowrap;
}