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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>CSS Writing Modes Test: 'vertical-lr' and margin collapsing - elements with 'overflow' set to 'hidden'</title>
<link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
<link rel="help" href="http://www.w3.org/TR/css-writing-modes-3/#logical-direction-layout" title="7.4 Flow-Relative Mappings" />
<link rel="match" href="../reference/ref-filled-green-100px-square.xht" />
<!--
Test adapted and modified from
http://test.csswg.org/suites/css2.1/nightly-unstable/html4/margin-collapse-009.htm
"
The margin collapsing rules apply exactly with the block-start margin substituted for the top margin and the block-end margin substituted for the bottom margin.
"
-->
<meta content="ahem image" name="flags" />
<meta name="assert" content="This test checks that elements with 'overflow' set to 'hidden' do not collapse margin with in-flow children in 'vertical-lr' writing-mode. In this test, we are testing and checking that 'margin-left' of div#overflow does not collapse with 'margin-left' of div#nested." />
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<style type="text/css"><![CDATA[
div
{
font: 25px/1em Ahem;
height: 4em;
}
div#wrapper
{
background-color: green;
width: 8em;
writing-mode: vertical-lr;
}
div#overflow
{
background-color: white;
margin-left: 4em; /* block-start margin of overflowed block */
overflow: hidden;
width: 4em;
}
div#nested
{
background-color: red;
margin-left: 4em; /* block-start margin of sub-block */
width: 4em;
}
]]></style>
</head>
<body>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div id="wrapper">
<div id="overflow">
<div id="nested"></div>
</div>
</div>
</body>
</html>
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