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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 Reftest Reference</title>
<link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
<meta name="DC.date.created" content="2016-10-04T09:54:03+11:00" scheme="W3CDTF" />
<meta name="DC.date.modified" content="2017-01-08T09:54:03+11:00" scheme="W3CDTF" />
<style type="text/css"><![CDATA[
html
{
padding: 100px 0px;
writing-mode: vertical-rl;
}
body
{
font-size: 16px;
line-height: 1.25; /* therefore, each line box is 20px tall */
}
p
{
left: 8px;
position: absolute;
writing-mode: horizontal-tb;
}
p#sentence-before
{
margin-top: 0px;
top: 100px;
}
div
{
border: blue solid 3px;
height: auto;
left: 8px;
position: absolute;
top: 136px;
}
p#sentence-after
{
padding-bottom: calc(600px - 100px + 16px - 52px - 3px - 15ch - 3px - 52px + 16px);
/*
600px
-
100px
+
16px : margin collapsing of p#sentence-before's margin-top with body's margin-top
-
52px
-
3px
-
15ch
-
3px
-
52px
+
16px : margin collapsing of p#sentence-after's margin-bottom with body's margin-bottom
============
approx. 270px
*/
top: calc(136px + 3px + 15ch + 3px);
/*
15ch means 15 ch unit where each ch is equal to
the used advance measure of the "0" (ZERO, U+0030) glyph found
in the font used to render it.
5.1.1. Font-relative lengths: the em, ex, ch, rem units
https://www.w3.org/TR/css3-values/#ch
*/
}
]]></style>
</head>
<body>
<p id="sentence-before">Sentence before.</p>
<div>123456789012345</div>
<p id="sentence-after">Sentence after.</p>
</body>
</html>
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