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<!doctype html>
<meta charset="utf-8">
<title>CSS Test Reference</title>
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
<p>You should see a green box twice-the-initial-font-size wide.</p>
<div style="width: 2em; height: 2em; background: green;"></div>