<!DOCTYPE html>
<html>
<head>
    <title>This test verifies that an element's drop shadow filter is not clipped when a CSS opacity property is applied.</title>
    <!--
        This is the reference file for the the test. 
        If the associated test passes, you should see a gray square and a light green square.
    -->
    <style>
        body {
            margin: 0;
        }
        #filtered {
            background-color: black;
            opacity: 0.5;
            width: 100px;
            height: 100px;
        }
        #drop-shadow {
            background-color: #0f0;
            opacity: 0.5;
            position: absolute;
            top: 110px;
            left: 110px;
            width: 100px;
            height: 100px;
        }
    </style>
</head>
<body>
    <div id="filtered"></div>
    <div id="drop-shadow"></div>
</body>