SO fiddle

Test Fiddle mainly for SO Questions

by Nick Craver

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.4/themes/overcast/jquery-ui.css">
<ul id='foo'>
  <li class='fooitem'>Parent
    <ul class='grok'>
      <li class='grokitem'>Child</li>
    </ul>
  </li>
</ul>

CSS

#foo li {
  background-color: red;
}

#foo .grok li {
  background-color: green;
}