<!DOCTYPE html>
<html>
  <meta charset="utf-8">
  <title>CSS Multi-column Layout Test Reference: Test a multi-column container with percentage height children</title>
  <link rel="author" title="Ting-Yu Lin" href="tlin@mozilla.com">
  <link rel="author" title="Mozilla" href="http://www.mozilla.org/">

  <style>
  article {
    width: 400px;
    height: 200px;
    background-color: lightgreen;
    border: 5px solid purple;
  }
  div.columns {
    column-count: 2;
  }
  div.block1 {
    background-color: yellow;
    height: 600px;
  }
  div.spanner {
    height: 50px;
    background-color: lightblue;
  }
  div.block2 {
    background-color: yellow;
    height: 200px;
  }
  </style>

  <article>
    <div class="columns" style="height: 200px;">
      <div class="block1">block1</div>
    </div>
    <div class="spanner">spanner</div>
    <div class="columns" style="height: 1px;">
      <div class="block2">block2</div>
    </div>
  </article>
</html>