<!DOCTYPE HTML>
<title>CSS Test Reference</title>
<link rel="author" title="L. David Baron" href="https://dbaron.org/">
<link rel="author" title="Mozilla" href="http://www.mozilla.org/">
<meta name="flags" content="">
<style>
/* spec ambiguous whether font-size-adjust influences line-height: normal */
body { line-height: 1.2 }
</style>

<p>before</p>
<p>zero</p>
<p>after</p>