.vp-sidebar {
  top: calc(var(--vp-header-height) + 24px);
  bottom: 0;
  box-sizing: border-box;
  padding: 2px 16px;
  background: var(--vp-panel);
  overflow-x: hidden;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--ui-border-subtle) transparent;
  position: fixed;
  width: 240px;
  min-width: 120px;
}

.vp-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-bottom: 24px;
}

.vp-nav-item {
  position: relative;
  display: grid;
  gap: 2px;
}

.vp-nav-item.has-children {
  padding-block: 2px;
}

.vp-nav-title {
  display: flex;
  align-items: center;
  min-height: 36px;
  padding: 9px 10px;
  border-radius: var(--radius-md);
  color: var(--tone-caption);
  font-size: var(--font-size-md);
  line-height: 1.35;
  text-decoration: none;
}

.vp-nav-title:hover,
.vp-nav-title.is-active,
.vp-nav-item.is-active>.vp-nav-title {
  color: var(--vp-accent);
  background: var(--vp-accent-bg);
}

.vp-nav-title:not([href]) {
  cursor: pointer;
}

.vp-nav-toggle {
  appearance: none;
  white-space: nowrap;
  user-select: none;
  touch-action: manipulation;
  display: flex;
  justify-content: center;
  align-items: center;

  position: absolute;
  top: 5px;
  right: 4px;

  height: 2rem;
  line-height: 1;
  padding: 0;
  border: none;
  border-radius: var(--radius-md);
  aspect-ratio: 1;
  outline: none;
  font-size: var(--font-size-md);
  color: var(--tone-caption);
  background-color: transparent;
}

.vp-nav-toggle:hover {
  background-color: var(--tone-subtle);
  border: 1px solid var(--tone-subtle);
}

.vp-nav-toggle svg {
  width: var(--font-size-md);
  transition: transform 0.18s ease;
}

.vp-nav-item.has-children>.vp-nav-title {
  padding-right: 36px;
}

.vp-nav-item.is-collapsed>.vp-nav-toggle svg {
  transform: rotate(-90deg);
}

.vp-nav-children {
  display: grid;
  gap: 2px;
  margin-left: 10px;
  padding-left: 10px;
  border-left: 1px solid var(--vp-line);
}

.vp-nav-children[hidden] {
  display: none;
}

.vp-nav-children .vp-nav-title {
  min-height: 32px;
  padding-block: 6px;
  font-size: var(--font-size-sm);
}