File: margin-collapse-140.xht

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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>