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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 - collapse through sibling</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" />
<meta content="ahem image" name="flags" />
<meta name="assert" content="This test checks that horizontal margins of boxes can collapse through a sibling box whose left and right margins collapse in 'vertical-lr' writing-mode." />
<style type="text/css"><![CDATA[
div
{
font: 25px/1em Ahem;
height: 4em;
}
div#wrapper
{
background-image: url("support/margin-collapse-2em-space-wm-vert.png");
writing-mode: vertical-lr;
}
div#left-most-sibling
{
background-color: green;
margin-right: 2em;
width: 1em;
}
div#middle-sibling
{
margin-left: 2em;
margin-right: 2em;
}
div#right-most-sibling
{
background-color: green;
margin-left: 2em;
width: 1em;
}
]]></style>
</head>
<body>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div id="wrapper">
<div id="left-most-sibling"></div>
<div id="middle-sibling"></div>
<div id="right-most-sibling"></div>
</div>
</body>
</html>
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