<!doctype html>
<title>font-size depends on writing-mode</title>
<meta charset="utf-8">
<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">
<link rel="author" href="https://mozilla.org" title="Mozilla">
<link rel="match" href="viewport-units-writing-mode-font-size-ref.html">
<link rel="help" href="https://drafts.csswg.org/css-values-4/#viewport-relative-lengths">
<style>
  .test {
    width: 1em;
    height: 1em;
    background-color: green;
    display: inline-block;
  }
  #t1 {
    writing-mode: vertical-lr;
    font-size: 1vi;
  }
  #t2 {
    writing-mode: vertical-lr;
    font-size: 1vb;
  }
  #t3 {
    font-size: 1vi;
    writing-mode: vertical-lr;
  }
  #t4 {
    font-size: 1vb;
    writing-mode: vertical-lr;
  }
</style>
<div class="test" id="t1"></div>
<div class="test" id="t2"></div>
<div class="test" id="t3"></div>
<div class="test" id="t4"></div>
