#table-of-contents .list-group-item {
  position: relative;
  padding-left: 2em;
}

#table-of-contents .list-group-item .list-group {
  font-size: 0.95em;
}

#table-of-contents a[data-bs-toggle="collapse"] {
  position: absolute;
  padding: 0 0.5em;
  left: 0;
  top: 0.5em;
}

#table-of-contents a[data-bs-toggle="collapse"] > i {
  display: inline-block;
  transition: all 0.1s ease;
}
#table-of-contents a[data-bs-toggle="collapse"][aria-expanded="true"] > i {
  -webkit-transform: rotate(90deg);
  -moz-transform: rotate(90deg);
  -ms-transform: rotate(90deg);
  -o-transform: rotate(90deg);
  transform: rotate(90deg);
}