<!DOCTYPE html>
<link rel="author" title="Mats Palmgren" href="mailto:mats@mozilla.com">
<link rel="help" href="https://www.w3.org/TR/css-break-3/">
<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
<style>
.col {
  column-width: 100px;
  column-rule: 100px solid red;
  height: 100px;
  column-fill: auto;
  gap: 0;
  overflow: hidden;
}

.col > div {
  display: flow-root;
  width: 100px;
  height: 100px;
  background: green;
}

.col > div > div {
  width: 10px;
  height: 10px;
  margin-top: 80px;
  margin-left: 50px;
  outline: 30px solid green;
  box-shadow: 0 30px 0 30px green;
}
</style>
<body>
  <p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
  <div class="col"><div><div></div></div></div>
</body>
