<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN">
<html lang="en">
 <head>
  <title>Margin Collapsing: in flow (simple)</title>
  <style type="text/css">
   .ahem { display: inline; font: 1em/1 Ahem, sans-serif; background: red; color: white; }
   /* test */
   .test { margin: 1em; background: green; font: 40px/1 Ahem; width: 3em; }
   .test div { color: white; margin: 1em; }
  </style>
 </head>
 <body>
  <div class="ahem">Ahem_font_required_for_this_test.</div>
  <p>There should be a big square green H below:</p>
  <div class="test">
   <div>X</div>
   <div>X</div>
  </div>
 </body>
</html>