<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8"/>
</head>
<style>
#content { display: inline-block; }
.monospace_fallback { font: 3em monospace; }
</style>
<body>

<div id="content" class="monospace_fallback">
abcdefghijklmnopqrstuvwxyz<br>
<b>abcdefghijklmnopqrstuvwxyz</b><br>
<i>abcdefghijklmnopqrstuvwxyz</i>
</div>

</body>
</html>