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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>CSS Test: Margin Collapsing: top margins</title>
<link rel="author" title="Ian Hickson" href="mailto:ian@hixie.ch"/>
<link rel="alternate" href="http://www.hixie.ch/tests/adhoc/css/box/block/margin-collapse/040.html" type="text/html"/>
<link rel="help" href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins"/>
<style type="text/css">
.a { margin: 0; background: red; }
.b { margin: 2em 0 0 0; background: red; }
.c { margin: 0; background: red; }
.d { margin: 1em 0 0 0; background: green; color: white; }
</style>
</head>
<body>
<p>There should be no red below.</p>
<div class="a">
<div class="b">
<div class="c">
<div class="d">
This line should be green.
</div>
</div>
</div>
</div>
</body>
</html>
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