<!DOCTYPE html>
<html id="html">
  <style>
  :root {
    font: 16px/1.25 monospace;
  }
  div {
    width: 100px;
    height: 5000px;
    border: 5px solid blue;
  }
  </style>

  <div>
    <span id="content">AAAAA</span><br>
    <span id="content2">BBBBB</span>
  </div>
</html>
