<!DOCTYPE HTML>
<html lang="en">
<head>
<title>drop-shadow with negative radius</title>
<style type="text/css">
#target {
width: 100px;
height: 100px;
background-color: rgb(0, 255, 0);
}
</style>
</head>
<body>
<div id="target"></div>
</body>
</html>