<!DOCTYPE html>
<html>
<head>
  <style>
  .positioned { background: lightblue; position: absolute; top: 0; bottom: 0; left: 0; right: 0; }
  .red {color: red}
  </style>
 </head>
 <body>
 <br>
  <p class="positioned">Test passes if there's no visible red text below this paragraph</p>
    <p class="red">well this paragraph ought to be invisible</p>
 </body>
</html>
