gecko-dev/content/xml/tests/toc/toc.css

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

toc {
  position:fixed;
  top:0; 
  left:0; 
  width:12em; 
  height:100%;
  border-right: 1px solid black;
  background-color: #CCE6F3;
  font-family: Arial;
  overflow:auto;
  color: darkblue;
}

toc > title {
  display: block;
  font-size:12pt;
  font-weight: bold;
  background-color: black;
  color:white;
}

toclink:visited {
  color: purple;
}

toclink:active {
  color: red;
}

level1 {
   display: block;
   font-weight:bold;
   font-size:12pt;
   margin-left: 4px;
   margin-bottom: 2px;
}

level1 > toclink {
   list-style-position: inside;
   text-decoration: none;
   color: darkblue;
}

level2 {
   display: block;
   font-size:11pt;
   margin-left: 8px;
   margin-bottom: 2px;
}

level2 > toclink {
   list-style-position: inside;
   text-decoration: none;
   color: darkblue;
}

level3 {
   display: list-item;
   font-size: 8pt;
   margin-left: 12px;
   margin-bottom: 2px;
}

level3 > toclink {
   list-style-position: inside;
   text-decoration: none;
   color: darkblue;
}

toc img {
   margin-right: 1em;
}