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<head>
<title>CSS Test: Margin Collapsing with Clearance</title>
<style type="text/css">
div.target1 { position: absolute; left: -15px; height: 50px; width: 0; border-left: 10px solid yellow; top: 0px; }
div.target3 { position: absolute; left: -15px; height: 50px; width: 0; border-left: 5px solid orange; top: 100px; }
div.target4 { position: absolute; left: -10px; height: 50px; width: 0; border-left: 5px solid silver; top: 100px; }
div.container { width: 150px; position: relative; margin-left: 20px; border: solid thin; }
div.box1 { height: 50px; margin: 0; background-color: yellow; }
div.parentof2and3 { margin: 0; background-color: silver; padding-right: 10px; }
div.box2 { display: none; }
div.box3 { overflow: hidden; margin-top: 50px; height: 50px; background-color: orange; }
</style>
</head>
<body>
<p>The coloured bars on the left should match the coloured boxes in the black box.</p>
<div class="container">
<div class="target1"></div>
<div class="target3"></div>
<div class="target4"></div>
<div class="box1">A</div>
<div class="parentof2and3">
<div class="box2">B</div>
<div class="box3">C</div>
</div>
</div>
</body>
</html>