.collapsible-toctree ul {
  list-style: none;
  margin: 0.2rem 0 0.2rem 1rem;
  padding-left: 0.75rem;
}

.collapsible-toctree li {
  margin: 0.15rem 0;
}

.collapsible-toctree .toctree-row {
  display: flex;
  align-items: flex-start;
  gap: 0.3rem;
}

.collapsible-toctree .toctree-toggle {
  border: 0;
  background: transparent;
  padding: 0;
  margin: 0;
  width: 1em;
  flex: 0 0 1em;
  cursor: pointer;
  line-height: 1;
  font-size: 0.9em;
}

.collapsible-toctree .toctree-toggle::before {
  content: "▸";
  display: inline-block;
}

.collapsible-toctree .toctree-toggle[aria-expanded="true"]::before {
  content: "▾";
}

.collapsible-toctree .toctree-toggle-spacer {
  display: inline-block;
  width: 1em;
  flex: 0 0 1em;
}

.collapsible-toctree li.toctree-collapsed > ul {
  display: none;
}

.collapsible-toctree a {
  text-decoration: none;
}

.collapsible-toctree a:hover {
  text-decoration: underline;
}