<!DOCTYPE html><html><head>
<title>Impossible rules (* html, * :root)</title>
<style type="text/css">* html { background-color: red; }
* :root { background-color: red; }
p { color: green; }</style>
<link rel="author" title="Ian Hickson" href="mailto:ian@hixie.ch">
<link rel="help" href="https://www.w3.org/TR/css3-selectors/#selectors"> <!-- bogus link to make sure it gets found -->
<meta name="flags" content="">
</head>
<body>
<p>This line should be green (there should be no red on this page).</p>
</body></html>