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<!DOCTYPE html>
<title>CSS Anchor Positioning: Originating element implicit anchor for pseudo elements</title>
<link rel="match" href="/css/reference/ref-filled-green-100px-square-only.html">
<style>
#anchor::after {
content: "";
position: absolute;
width: 100px;
height: 100px;
bottom: anchor(top);
background: green;
}
#ref {
width: 100px;
height: 100px;
background: red;
}
</style>
<p>Test passes if there is a filled green square.</p>
<div id="ref"></div>
<div id="anchor"></div>