<!DOCTYPE html><html><head>
<title>:first-line with ::first-line</title>
<style type="text/css">
p:first-line { background-color: red; }
p::first-line { background-color: lime; }
</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>The first line of this paragraph should have a green background.</p>
</body></html>