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<!DOCTYPE html>
<html>
<head>
<title>ttwf-reftest-alignContent-ref</title>
<link rel="author" title="Heechang Kang" href="mailto:hckang80@gmail.com">
<style type="text/css">
#main{
display:table;
position:relative;
font-size:0;
width:70px;
border:1px solid #c3c3c3;
}
#main .sample{
position:absolute;
left:0;
top:50%;
z-index:-1;
margin:-35px 0 0;
}
#main > span{
display:inline-block;
width:70px;
height:70px;
margin:50px 0;
}
</style>
</head>
<body>
<p>PASS if there is no red box.</p>
<div id="main">
<span class="sample" style="background-color:red;"></span>
<span style="background-color:green;"></span>
</div>
</body>
</html>