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Test Info:

<!DOCTYPE html PUBLIC "-//W3C//DTD//XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<head>
<title>CSS Test: A flex container with the 'align-items' property set to 'center'</title>
<link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
<link rel="match" href="reference/align-content-001-ref.html" />
<meta name="assert" content="This test checks that the flex container with 'align-items: center' centers each flex item's margin box in the cross-axis of its line." />
<meta name="fuzzy" content="maxDifference=0-1; totalPixels=0-6217" />
<style type="text/css">
#flexbox
{
background: linear-gradient(to bottom, green 0, green 25px, red 25px, red 75px, green 75px, green 100px);
align-items: center;
display: flex;
height: 100px;
width: 300px;
}
div div
{
background-color: green;
height: 52px;
width: 150px;
}
</style>
</head>
<body>
<p>Test passes if there is no red visible on the page.</p>
<div id="flexbox">
<div></div>
<div></div>
</div>
</body>
</html>