/* Two-level document taxonomy for the bilingual Wiki indexes. */
.category-nav .category-tree {
  display: grid;
  gap: 6px;
}

.category-tree__group {
  min-width: 0;
}

.category-nav .category-tree__toggle {
  width: 100%;
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 10px 9px 11px;
  border: 0;
  border-radius: 7px;
  color: var(--muted);
  background: transparent;
  font: inherit;
  font-size: 14px;
  text-align: left;
  cursor: pointer;
  transition: color 160ms ease, background 160ms ease;
}

.category-nav .category-tree__toggle:hover,
.category-nav .category-tree__toggle[aria-expanded="true"] {
  color: var(--fg);
  background: var(--glass-chip);
}

.category-tree__toggle-copy {
  min-width: 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.category-tree__chevron {
  flex: 0 0 8px;
  width: 8px;
  height: 8px;
  margin-right: 2px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  transition: transform 180ms ease;
}

.category-tree__toggle[aria-expanded="true"] .category-tree__chevron {
  transform: rotate(225deg) translateY(-2px);
}

.category-tree__children {
  display: grid;
  gap: 3px;
  margin: 3px 0 8px 11px;
  padding: 3px 0 4px 10px;
  border-left: 1px solid color-mix(in oklab, var(--border) 86%, transparent);
}

.category-tree__children[hidden] {
  display: none;
}

.category-nav .category-tree__children a {
  min-width: 0;
  min-height: 32px;
  justify-content: flex-start;
  padding: 7px 9px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
}

.category-nav .category-tree__children a:hover,
.category-nav .category-tree__children a:focus-visible {
  color: var(--accent);
  background: color-mix(in oklab, var(--accent) 10%, transparent);
}

.category-nav .category-tree__toggle:focus-visible,
.category-nav .category-tree__children a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* The shared shell otherwise clips sticky descendants from the Wiki index. */
@media (min-width: 901px) {
  .wiki-shell {
    overflow: visible;
  }

  .category-nav {
    position: sticky;
    top: 96px;
    z-index: 2;
    align-self: start;
  }
}

@media (max-width: 900px) {
  .category-nav .category-tree {
    grid-template-columns: 1fr;
  }
}