.sidebar {
  --sidebar-nav-item-min-height: var(--control-size-lg);
  position: relative;
  min-width: 0;
  min-height: 0;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
  gap: var(--space-4);
  padding: var(--space-4);
  overflow: hidden;
  border-top-left-radius: inherit;
  isolation: isolate;
}

.header {
  display: grid;
  gap: var(--space-3);
}

.headerActions {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--space-2);
  justify-items: stretch;
}

.headerControls {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

.headerDrawerOpen {
  z-index: 4;
}

.headerActionButton {
  width: 100%;
  min-height: var(--control-size-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid color-mix(in srgb, var(--color-border-strong) 44%, transparent);
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--color-surface) 94%, transparent);
  color: var(--color-text-muted);
  box-shadow: var(--shadow-soft);
  transition:
    background 160ms var(--easing-standard),
    color 160ms var(--easing-standard),
    border-color 160ms var(--easing-standard),
    transform 180ms var(--easing-standard);
}

.headerActionButton:hover,
.headerActionButton:focus-visible {
  background: var(--color-surface-hover);
  border-color: var(--color-border);
  color: var(--color-text);
}

.headerActionButton:hover {
  transform: translateY(-1px);
}

.headerCollapseButton {
  background: color-mix(in srgb, var(--color-accent-soft) 58%, transparent);
  color: var(--color-accent-strong);
}

.section {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: var(--space-2);
  min-height: 0;
  position: relative;
  z-index: 1;
  transition:
    opacity 180ms var(--easing-standard),
    transform 220ms var(--easing-standard);
}

.sectionHidden {
  opacity: 0;
  pointer-events: none;
  transform: translateX(var(--space-3));
}

.navScroller {
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-right: var(--space-1);
	padding-bottom: calc(var(--space-4) + var(--sidebar-dock-clearance, var(--shell-dock-clearance)));
  margin-right: calc(var(--space-1) * -1);
}

.sectionLabel {
  @include text-label;
  color: var(--color-text-muted);
}

.navList {
  list-style: none;
  display: grid;
  gap: var(--space-1);
  padding: 0;
}

.treeSectionLabel {
  @include text-caption;
  margin: var(--space-3) 0 var(--space-2);
  padding: 0 var(--space-3);
  color: var(--color-text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.treeList {
  list-style: none;
  display: grid;
  gap: var(--space-1);
  padding: 0;
}

.navItem {
  width: 100%;
  min-width: 0;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-2);
  min-height: var(--sidebar-nav-item-min-height);
  padding: var(--space-2) var(--space-3);
  @include interactive-frame(transparent, transparent, var(--color-text-muted), var(--radius-lg));
  text-align: left;
  @include interactive-frame-hover(var(--color-surface-hover), transparent, var(--color-text));
}

.treeItem {
  width: 100%;
  min-width: 0;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-2);
  min-height: calc(var(--control-size-lg) - var(--space-2));
  padding: var(--space-2) var(--space-3);
  padding-left: calc(var(--space-3) + (var(--tree-depth, 0) * var(--space-4)));
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  background: transparent;
  color: var(--color-text-muted);
  text-align: left;
  transition:
    background 160ms var(--easing-standard),
    color 160ms var(--easing-standard),
    border-color 160ms var(--easing-standard),
    transform 180ms var(--easing-standard);
}

.treeItem:hover,
.treeItem:focus-visible {
  background: var(--color-surface-hover);
  color: var(--color-text);
}

.treeItemFolder {
  color: var(--color-text);
}

.treeItemActive {
  border-color: var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: inset 0 1px 0 color-mix(in srgb, white 4%, transparent);
}

.navItemActive {
  border-color: var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: inset 0 1px 0 color-mix(in srgb, white 4%, transparent);
}

.icon {
  color: inherit;
  opacity: 0.85;
}

.label {
  @include text-label;
  min-width: 0;
}

.itemMeta {
  @include text-caption;
  color: var(--color-text-muted);
}

.sidebarCollapsed {
  gap: var(--space-3);
  padding: var(--space-3) var(--space-2);
}

.sidebarCollapsed .headerActions {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.sidebarCollapsed .headerControls {
  justify-items: center;
}

.sidebarCollapsed .header {
  justify-items: center;
}

.sidebarCollapsed .navScroller {
  padding-right: 0;
  margin-right: 0;
}

.sidebarCollapsed .navItem {
  grid-template-columns: auto;
  justify-content: center;
  gap: 0;
  min-height: calc(var(--control-size-lg) - var(--space-1));
  padding: var(--space-2);
  border-radius: var(--radius-md);
}

.sidebarCollapsed .label,
.sidebarCollapsed .itemMeta,
.sidebarCollapsed .treeSectionLabel,
.sidebarCollapsed .treeList {
  display: none;
}

.sidebarCollapsed .icon {
  opacity: 1;
}

.sidebarCollapsed .section {
  gap: var(--space-3);
}

@include respond-down(mobile) {
  .sidebar {
    display: none;
  }
}