sousa-gecko/testing/web-platform/tests/css/css-backgrounds/box-shadow-radius-002-ref.html

<!DOCTYPE html>
<title>CSS Reference: Box Shadow Border Radius (Inset)</title>
<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">

<style>
body {
  margin: 0;
}
#target {
  width: 100px;
  height: 100px;
  border: 50px solid;
  margin: 50px;
  border-radius: 75px;
}
</style>
<div id="target"></div>