<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>CSS Multi-column Layout Test: vertically adjacent spanning elements with nested margins (complex)</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/"> <!-- 2013-08-19 -->
<link rel="help" href="http://www.w3.org/TR/css3-multicol/#column-span" title="6.1. 'column-span'">
<link rel="match" href="reference/multicol-span-all-margin-nested-001-ref.htm">
<meta name="flags" content="ahem">
<meta name="assert" content="In this test, the first h4 element would collapse its margin bottom with the resulting (from a margin collapsing with its nested h4 element) of top margin of div#child if only div#child was also a spanning element, which is not: the bottom margin of the first h4 element is 8em wide while the top margin of div#child is only 2em wide (1 column box wide). That is why the bottom margin of the first h4 element should not collapse with the top margin of div#child.">
<style type="text/css">
div#multi-column
{
background-color: yellow;
border: gray solid 1em;
color: navy;
font: 1.25em/1 Ahem;
orphans: 1;
overflow: hidden;
widows: 1;
width: 8em;
column-count: 4;
column-gap: 0em;
/*
N == 4;
W == 2em;
*/
}
h4, div#child
{
background-color: black;
color: black;
font: inherit;
margin: 1em 0;
}
div#child {margin: 1em 0 0;}
h4
{
width: 11em;
column-span: all;
}
</style>
</head>
<body>
<div id="multi-column">
na vy na vy
na vy na vy
<h4 id="first">black</h4>
<div id="child">
<h4 id="nested">black</h4>
</div>
na vy na vy
na vy na vy
</div>
</body>
</html>