<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Containment Test: Reference file</title>
<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
<style>
.wrapper {
  border: solid thick;
  margin: 1em;
}
</style>
<p>Test passes if it has the same output than the reference.</p>
<div class="wrapper">
  <div style="margin: 2em 0;">This text should have 2em top and bottom margins (margins do not collapse).</div>
</div>