        }
            #div2
            {
                border-top: 1in solid black;
                bottom: 100%;
            }
        </style>
    </head>
    <body>
        <p>Test passes if there is <strong>no red</strong>.</p>
        <div id="div1">
            <div id="div2"></div>
        </div>
    </body>
</html>