/* No marker for leaf items */
#toc li:not(.expander) > a::before {
  content: "";
}

/* chevron-right icon for collapsed parent items */
#toc li.expander > a::before {
  font-family: "bootstrap-icons";
  content: "\f285";
  display: inline-block;
  margin-right: 4px;
  transition: transform 0.15s ease;
}

/* Rotate ">" to point downward when expanded */
#toc li.expander.expanded > a::before {
  transform: rotate(90deg);
}

/* Bold the active item */
#toc li.active > a {
  font-weight: bold;
}

/* Hide the original expand-stub arrow button */
#toc .expand-stub {
  display: none;
}

/* Collapse children by default */
#toc li.expander > ul {
  display: none;
}

/* Show children when expanded or active */
#toc li.expander.expanded > ul,
#toc li.expander.active > ul {
  display: block;
}