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<!doctype html>
<title>CSS Test Reference</title>
<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">
<style>
div {
position: absolute;
top: 10px;
left: 10px;
background: green;
width: 100px;
height: 100px;
}
</style>
<div></div>