 1in;
            }
            #reference
            {
                background-color: black;
                height: 1in;
                margin-left: 5px;
            }
            #test
            {
                border-bottom-style: solid;
                border-bottom-width: 6pc;
                height: 0;
            }
        </style>
    </head>
    <body>
        <p>Test passes if the 2 filled black squares have the <strong>same height</strong>.</p>
        <div id="test"></div>
        <div