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<head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>CSS Multi-column Layout Test: multi-column and margin collapsing of first child (basic)</title>
<link rel="author" title="Opera Software ASA" href="http://www.opera.com/" />
<link rel="reviewer" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" /> <!-- 2013-08-10 -->
<link rel="help" href="http://www.w3.org/TR/css3-multicol/#pseudo-algorithm" title="3.4 Pseudo-algorithm" />
<link rel="match" href="reference/ref-filled-green-100px-square.xht" />
<meta name="flags" content="ahem" />
<meta name="assert" content="This test checks that the margin-top of the first child of a multi-column element (with column-fill: auto) does not collapse with its parent." />
<style type="text/css"><![CDATA[
div#test-multi-column-red
{
background-color: red;
color: white;
font: 3.125em/1 Ahem; /* equivalent to 50px/50px Ahem */
height: 4em;
margin-top: 0em;
width: 4em;
column-count: 2;
column-fill: auto;
column-gap: 0em;
}
div#first-child {margin-top: 2em;}
div#reference-overlapping-green
{
background-color: green;
bottom: 200px;
height: 100px;
position: relative;
width: 100px;
}
]]></style>
</head>
<body>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div id="test-multi-column-red">
<div id="first-child">ab cd</div>
ef gh ij kl
</div>
<div id="reference-overlapping-green"></div>
<!--
Expected result (before the overlapping):
*********************
| margin- | ef |
| top red | |
| back | gh |
| ground | |
*********************
| ab | ij |
| | |
| cd | kl |
| | |
*********************
-->
</body>
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