/* ============================================================================
   ELEMENTS SIDEBAR STYLES
   ============================================================================ */

/* Sidebar / elements */

.sidebar-content {
  padding: 9px 9px 12px;
  height: calc(100% - 48px);
  overflow: auto;
  min-height: 0;
  flex: 1;

  /* OPTIMIZED: CSS containment - isolate scrollable sidebar content */
  contain: layout style;
}

.sidebar-content::-webkit-scrollbar {
  width: 9px;
}

.sidebar-content::-webkit-scrollbar-track {
  background: var(--space-opacity-60);
}

.sidebar-content::-webkit-scrollbar-thumb {
  background: var(--blue-opacity-40);
  border-radius: 6px;
  border: 1px solid var(--blue-opacity-20);
}

.sidebar-content::-webkit-scrollbar-thumb:hover {
  background: var(--blue-opacity-60);
  box-shadow: 0 0 9px var(--blue-opacity-60);
}

.elements-section+.elements-section {
  margin-top: 12px;
}

.elements-section {
  /* OPTIMIZED: CSS containment - isolate element sections */
  contain: layout style;
}

.elements-title {
  font-size: var(--font-9);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 9px;
  font-weight: 700;
}

.elements-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.35rem;

  /* OPTIMIZED: CSS containment - isolate elements grid */
  contain: layout style;
}

.elements-item {
  border-radius: 9px;
  border: 2px solid var(--blue-opacity-30);
  padding: 9px 12px;
  font-size: var(--font-12);

  /* OPTIMIZED: Removed backdrop-filter - nested element item doesn't need it */
  background: var(--space-opacity-90);
  cursor: grab;
  display: flex;
  flex-direction: column;
  gap: 3px;
  user-select: none;
  box-shadow: 
    0 6px 18px var(--black-opacity-50),
    0 0 9px var(--blue-opacity-10);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease, background 0.3s ease;
  color: var(--text-primary);
}

.elements-item:hover {
  transform: translateY(-3px);
  box-shadow: 
    0 12px 36px var(--black-opacity-60),
    0 0 18px var(--blue-opacity-30),
    0 0 36px var(--green-opacity-20);
  border-color: var(--green-opacity-60);
  background: var(--green-opacity-10);
}

.elements-item-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-18);
  color: var(--cyan-bright);
  text-shadow: 0 0 9px rgb(51 204 255 / 60%);
}

.elements-item-label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: var(--font-12);
}

.elements-item-type {
  font-size: var(--font-9);
  color: var(--text-muted);
  font-weight: 600;
  letter-spacing: 0.03em;
}

.elements-item:active {
  cursor: grabbing;
}

/* Elements collapsing */
.elements-section.collapsible .elements-title {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  cursor: pointer;
}

.elements-caret {
  font-size: 0.75rem;
}

.elements-section.collapsed .elements-grid {
  display: none;
}

.elements-section.collapsed .elements-subgroup-header {
  display: none;
}/* Subgroup headers for nested categories (Display/Entry, Triggers/Navigation) */
.elements-subgroup-header {
  font-size: var(--font-9);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--cyan-bright);
  margin: 12px 0 6px;
  padding: 4px 8px;
  font-weight: 600;
  background: var(--blue-opacity-10);
  border-radius: 4px;
  border-left: 2px solid var(--cyan-bright);
}

.elements-subgroup-header:first-of-type {
  margin-top: 0;
}