<!DOCTYPE html>

 <meta charset="UTF-8">

 <title>CSS Reference File</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">

  <style>
  html, body, div
    {
      background-color: green;
      color: white;
      font-size: 40vh;
      height: 100%;
      margin: 0;
    }
  </style>

  <div>PASS</div>
