<!doctype html>
<html>
<head>
    <title>Expected result - Bug 127101: [CSS Regions] Fix selection and hover effect of content in region with overflow:hidden</title>
    <style>
        .content {
            margin: 10px;
            box-shadow: 0px 0px 0px 10px Green;
        }
        body {
            margin: 0;
            padding: 0;
        }
    </style>
</head>
<body>
    <div class="content">hover me</div>
</body>
</html>