<!DOCTYPE html>
<title>Reference</title>

<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<style>
  /* establish context */
  .container {
    clear: both;
    padding: 10px;
    color: blue;
    font: 20px/1 Ahem;
  }
  .zero {
    width: 0;
  }
  .infinite {
    width: 400px; /* close enough */
  }

  /* visualize size contribution */
  .container > div {
    float: left;
    border: solid orange 20px;
    border-style: none solid;
  }
  .container > div > div {
    border-right: solid 20px aqua;
  }

  /* controls for min-width */
  /* content = 100% = 80px = 4ch + border */
  /* choose sizes that are larger than content to see if how they take effect */
  .control {
    width: 60px;
  }
  .raw-percent,
  .calc-percent {
    width: 160px;
    margin-right: -100px;
  }
  .no-percent {
    width: 160px;
  }
</style>

<!-- calculating min-content widths -->
<div class='zero container'>
  <div><div class="control">ppp pp</div></div>
</div>
<div class='zero container'>
  <div><div class="raw-percent">ppp pp</div></div>
</div>
<div class='zero container'>
  <div><div class="calc-percent">ppp pp</div></div>
</div>
<div class='zero container'>
  <div><div class="no-percent">ppp pp</div></div>
</div>

<!-- calculating max-content widths -->
<div class='infinite container'>
  <div><div class="control">p p</div></div>
</div>
<div class='infinite container'>
  <div><div class="raw-percent">p p</div></div>
</div>
<div class='infinite container'>
  <div><div class="calc-percent">p p</div></div>
</div>
<div class='infinite container'>
  <div><div class="no-percent">p p</div></div>
</div>