<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
<div id="container" style="border-width: 10px; padding: 50px"
>surrounding <span id="rel"
style="left: 50%; top: 50%;"
>position relative</span> text</div>
</body>
</html>