src/cobalt/layout_tests/testdata/css-2-1/9-3-1-fixed-position-elements-compute-em-units-from-parent.html

<!DOCTYPE html>
<!--
 | This test checks that a fixed position element has its em units computed
 | from its parent's font-size, despite its containing block being the
 | initial containing block.
 -->
<html>
<head>
  <style>
    .root-container {
      font-size: 2px;
    }
    .half-font-size-container {
      font-size: 0.5em;
    }
    .fixed-element {
      position: fixed;
      width: 50em;
      height: 50em;
      top: 25px;
      left: 25px;
      background-color: rgb(100, 100, 255);
    }
  </style>
</head>

<body>
  <div class="root-container">
    <div class="half-font-size-container">
      <div class="fixed-element">
    </div>
  </div>
</body>
</html>