<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN">
<html lang="en">
 <head>
  <title>Margin collapsing with floats before self collapsing children with margins not collapsing with parent</title>
  <style type="text/css">
   /* This test requires half-decent z-index support */
   html { margin: 0; padding: 0; }
   body { margin: 0 10px; padding: 0; }
   .a { position: absolute; top: 13px; left: 10px; width: 20em; height: 4em; background: red; color: yellow; z-index: -1; }
   .b { float: left; width: 20em; height: 4em; background: green; color: white; }
   .c1 { margin: 2px; padding-top: 1px; } /* prevent collapsing with parent */
   .c2 { margin: -4px 20px; }
   .c3 { margin: 0 0 14px; }
   .c4 { margin: 50px; }
  </style>
 </head>
 <body>
  <div class="c1">
   <div class="c2">
    <div class="c3"></div>
   </div>
  </div>
  <div class="a">FAIL</div>
  <div class="b">This block should be green.</div>
  <div class="c4"></div>
 </body>
</html>