/* ── Arrow alignment ─────────────────────────────────────────────────────────
   Make each parent <li> a flex row so the toggle arrow always sits flush at
   the right edge of the sidebar regardless of link text length or nesting.
   The <details> child is forced onto its own row below via flex-basis: 100%.
   ─────────────────────────────────────────────────────────────────────────── */
.sidebar-tree-ready .sidebar-tree-parent {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

/* Link fills all space to the left of the toggle */
.sidebar-tree-ready .sidebar-tree-parent > a {
  flex: 1 1 auto;
  min-width: 0;
  display: block;
  max-width: none;
}

/* Details always wraps below the link+toggle row */
.sidebar-tree-ready .sidebar-tree-parent > details {
  flex-basis: 100%;
  min-width: 0;
  order: 10;
}

/* Hide the native disclosure summary — our button replaces it */
.sidebar-tree-ready .sidebar-tree-parent > details > summary {
  display: none;
}

/* ── Toggle button ───────────────────────────────────────────────────────────
   Fixed dimensions + flex-shrink: 0 keeps the button from moving or resizing.
   ─────────────────────────────────────────────────────────────────────────── */
.sidebar-tree-ready .sidebar-tree-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  margin-left: 0.25rem;
  padding: 0;
  color: inherit;
  background: transparent;
  border: 0;
  cursor: pointer;
}

.sidebar-tree-ready .sidebar-tree-toggle::before {
  content: '\25B8';
  font-size: 0.75rem;
  line-height: 1;
  transition: transform 0.2s ease;
}

.sidebar-tree-ready .sidebar-tree-parent.is-open > .sidebar-tree-toggle::before {
  transform: rotate(90deg);
}

/* ── Smooth collapse / expand ────────────────────────────────────────────────
   The JS always keeps <details open> so the <ul> stays in the DOM and CSS can
   animate it. max-height + opacity give a smooth slide-in on expand and a
   quick fade on collapse without any layout jumps.
   ─────────────────────────────────────────────────────────────────────────── */
.sidebar-tree-ready .sidebar-tree-parent > details > ul {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  margin-top: 0;
  transition: max-height 0.3s ease, opacity 0.2s ease;
}

.sidebar-tree-ready .sidebar-tree-parent.is-open > details > ul {
  max-height: 1500px;
  opacity: 1;
  margin-top: 0.25rem;
  transition: max-height 0.3s ease, opacity 0.25s ease;
}