/* ══════════════════════════════════════
   Element Library v2 — Styles
   ══════════════════════════════════════ */

/* ── Panel Container ── */
#element-library-panel {
  position: absolute;
  left: var(--toolbar-width);
  top: 0;
  bottom: 0;
  width: 280px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  z-index: 50;
  transform: translateX(-100%);
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 4px 0 20px rgba(0, 0, 0, 0.3);
}

#element-library-panel.open {
  transform: translateX(0);
}

#element-library-panel.hidden {
  pointer-events: none;
}

#element-library-panel.open.hidden {
  pointer-events: auto;
}

/* ── Header ── */
.lib-header {
  flex-shrink: 0;
  border-bottom: 1px solid var(--border-subtle);
}

.lib-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px 6px;
}

.lib-title {
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}

.lib-close-btn {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 12px;
  transition: all var(--transition-fast);
  cursor: pointer;
  background: none;
  border: none;
}

.lib-close-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* ── Search ── */
.lib-search-row {
  padding: 4px 12px 8px;
}

.lib-search-input {
  width: 100%;
  padding: 6px 10px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--fs-sm);
  outline: none;
  transition: border-color var(--transition-fast);
  box-sizing: border-box;
}

.lib-search-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px var(--accent-primary-glow);
}

.lib-search-input::placeholder {
  color: var(--text-muted);
}

/* ── Category Tabs ── */
.lib-category-tabs {
  display: flex;
  gap: 2px;
  padding: 0 8px 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

.lib-category-tabs::-webkit-scrollbar {
  display: none;
}

.lib-cat-tab {
  flex-shrink: 0;
  padding: 4px 8px;
  border-radius: var(--radius-md);
  font-size: 10px;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
  border: 1px solid transparent;
  cursor: pointer;
}

.lib-cat-tab:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.lib-cat-tab.active {
  background: var(--accent-primary-glow);
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

/* ── Element Grid ── */
.lib-grid-container {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  align-content: start;
}

.lib-element-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 4px 6px;
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.lib-element-card:hover {
  background: var(--bg-hover);
  border-color: var(--border-bright);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.lib-element-card:active {
  transform: scale(0.96);
}

.lib-element-card.selected {
  background: var(--accent-primary-glow);
  border-color: var(--accent-primary);
  box-shadow: 0 0 12px var(--accent-primary-glow), 0 4px 12px rgba(0, 0, 0, 0.3);
}

.lib-element-card.selected .lib-element-name {
  color: var(--accent-primary);
}

.lib-element-thumb {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-radius: var(--radius-sm);
}

.lib-element-thumb svg {
  max-width: 100%;
  max-height: 100%;
}

.lib-element-name {
  font-size: 9px;
  font-weight: 500;
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.2;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Hover Preview ── */
.lib-element-preview {
  display: none;
  position: absolute;
  left: calc(100% + 10px);
  top: 50%;
  transform: translateY(-50%);
  width: 180px;
  padding: 12px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  z-index: 200;
  pointer-events: none;
  animation: lib-preview-in 0.15s ease;
}

.lib-element-card:hover .lib-element-preview {
  display: block;
}

@keyframes lib-preview-in {
  from { opacity: 0; transform: translateY(-50%) translateX(-8px); }
  to { opacity: 1; transform: translateY(-50%) translateX(0); }
}

.lib-preview-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px 0 10px;
  min-height: 50px;
}

.lib-preview-inner svg {
  max-width: 100%;
  max-height: 70px;
}

.lib-preview-label {
  font-size: var(--fs-md);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.lib-preview-desc {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  margin-bottom: 4px;
}

.lib-preview-mode {
  font-size: 9px;
  color: var(--text-secondary);
  margin-bottom: 3px;
}

.lib-preview-anim {
  font-size: 9px;
  color: var(--accent-primary);
  padding: 2px 6px;
  background: var(--accent-primary-glow);
  border-radius: 10px;
  display: inline-block;
}

/* ── Empty State ── */
.lib-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 32px 16px;
  color: var(--text-muted);
  font-size: var(--fs-sm);
}

/* ── Footer ── */
.lib-footer {
  flex-shrink: 0;
  padding: 8px 12px;
  border-top: 1px solid var(--border-subtle);
  min-height: 32px;
}

.lib-hint {
  font-size: 9px;
  color: var(--text-muted);
}

.lib-creation-hint {
  font-size: 11px;
  color: var(--accent-primary);
  padding: 6px 10px;
  background: var(--accent-primary-glow);
  border-radius: var(--radius-md);
  line-height: 1.4;
}

.lib-creation-hint b {
  color: var(--text-primary);
  font-weight: 600;
}

.lib-creation-hint kbd {
  display: inline-block;
  padding: 1px 5px;
  font-size: 9px;
  border-radius: 3px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  font-family: monospace;
}