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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Reference case for text-underline-offset</title>
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<style>
span{
margin-left: 5em;
font: 20px/1 Ahem;
color: transparent;
writing-mode: vertical-lr;
text-decoration: green underline;
text-decoration-skip-ink: none;
text-underline-offset: 0;
text-underline-position: right;
}
</style>
</head>
<body>
<div>Test passes if the underline is vertical and at about a 5em margin from the left side.</div>
<div><span>XXXXX</span></div>
</body>
</html>