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<!DOCTYPE html>
<meta charset="UTF-8">
<title>CSS Reference File</title>
<link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">
<style>
html, body, div
{
background-color: green;
color: white;
font-size: 40vh;
height: 100%;
margin: 0;
}
</style>
<div>PASS</div>