<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>mo glyph height with default font (reference)</title>
  </head>
  <body>
    <div id="hider"
         style="position:absolute; top:0; left:0; background-color:green;
                height:1em; width:100%; z-index:1; padding-top:5px;
                padding-bottom:5px;" />
  </body>
</html>
