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<!DOCTYPE html>
<title>flexbox | margins</title>
<link rel="author" href="http://opera.com" title="Opera Software">
<link rel="help"
<link rel="match" href="flexbox_margin-ref.html">
<style>
div {
background: black;
margin: 1em;
height: 4em;
display: flex;
justify-content: space-around;
}
</style>
<div></div>