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<!DOCTYPE html>
<meta charset="utf-8">
<title>Tests the ascent-override and descent-override descriptors of @font-face</title>
<style>
.target {
  position: absolute;
  font-size: 20px;
  top: 10px;
  left: 10px;
  width: 60px;
  height: 30px;
}

.top-aligned {
  display: inline-block;
  background-color: green;
  width: 1em;
  height: 1em; /* Same as the overridden ascent */
  position: absolute;
  top: 0;
  left: 0;
}

.character {
  display: inline-block;
  background-color: green;
  width: 1em;  /* Same as an 'X' in Ahem */
  height: 1em; /* Same as an 'X' in Ahem */
  position: absolute;
  top: 0.2em; /* Difference between the overridden ascent and the origianl ascent */
  left: 1em;
}

.bottom-aligned {
  display: inline-block;
  background-color: green;
  width: 1em;
  height: 0.5em; /* Same as the overridden descent */
  position: absolute;
  top: 1em; /* Same as the overridden ascent */
  left: 2em;
}

</style>
<div class="target">
  <span class="top-aligned"></span><span class="character"></span><span class="bottom-aligned"></span>
</div>