c .item-toggle {
  display: inline-block;
  transform: rotate(-45deg) translate(-5px, -5px);
  transition: transform 0.1s ease;
  text-align: center;
  width: 20px;

  color: #aab;

  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;;

  cursor: pointer;
}

#menu-toc .item-toggle-none {
  display: inline-block;
  width: 20px;
}

#menu-toc li.active > .item-toggle {
  transform: rotate(45deg) translate