<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
  "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en-US">
<head>
  <title>Display Mode Reflow inner frame</title>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <meta http-equiv="Content-Style-Type" content="text/css">
  <style type="text/css" id="style" media="all">
  div {
    border: 2px solid black;
    width: 50px;
    height: 50px;
  }
  @media (display-mode: fullscreen) {
    #a { height: 100px; }
  }
  </style>
</head>
<body>
  <div id="a"></div>
  <div id="b"></div>
</body>
</html>