/* ── Unplaced Photos Panel ── */

.unplaced-photos-panel {
  margin-bottom: var(--space-lg);
  margin-left: auto;
  margin-right: auto;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  position: sticky;
  top: calc(var(--header-height) + var(--space-sm));
  z-index: var(--z-panel);
  box-shadow: var(--shadow-md);
  transition: box-shadow var(--transition-fast), max-width var(--transition-fast);
}

.unplaced-photos-panel.panel-dragged {
  position: fixed;
  z-index: var(--z-overlay);
  box-shadow: 0 8px 32px var(--overlay-light);
  width: 320px;
  height: 360px;
  resize: both;
  overflow: hidden;
  min-width: 200px;
  min-height: 140px;
  max-width: 100vw;
  max-height: 100vh;
  display: flex;
  flex-direction: column;
}

.unplaced-photos-panel.panel-dragged .unplaced-photos-body {
  max-height: none;
  flex: 1 1 auto;
}

.unplaced-photos-panel.panel-dragging {
  box-shadow: 0 12px 40px var(--overlay-strong);
  opacity: 0.95;
}

.panel-drag-reset {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1rem;
  padding: 2px 4px;
  border-radius: var(--radius-sm);
  line-height: 1;
  display: none;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.panel-drag-reset:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.unplaced-photos-panel.panel-dragged .panel-drag-reset {
  display: inline-block;
}

.unplaced-photos-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
  transition: background var(--transition-fast);
}

.unplaced-photos-header:hover {
  background: var(--bg-tertiary);
}

.unplaced-photos-header:active {
  cursor: grabbing;
}

.unplaced-photos-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.unplaced-photos-body {
  padding: var(--space-sm) var(--space-md) var(--space-md);
  max-height: 30vh;
  overflow-y: auto;
}

.unplaced-photos-panel.drag-over {
  border-color: var(--color-primary);
  border-style: dashed;
  background: color-mix(in srgb, var(--color-primary) 5%, var(--bg-secondary));
  box-shadow: var(--shadow-focus);
  transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
}

.unplaced-photos-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.unplaced-photo-card {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 2px solid var(--border-default);
  cursor: grab;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
  position: relative;
  flex-shrink: 0;
}

.unplaced-photo-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.unplaced-photo-card:active {
  cursor: grabbing;
}

.unplaced-photo-card.dragging {
  opacity: 0.4;
  transform: scale(0.95);
}

.unplaced-photo-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
  -webkit-user-drag: none;
}

.unplaced-empty-msg {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: var(--space-xs) 0;
}

/* Highlight empty slots when dragging from panel */
.preview-slot.empty-slot.drag-over {
  border-color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 12%, transparent);
}