data-foo="foo" data-bar="bar">
        <hr>

        <h3>CSS properties section</h3>
        <div style="display: block;
                    background-color: #ccc;
                    width: 150px;
                    height: 250px;
                    " id="div-css-simple"></div>
        <style>
            #div-css-styled {
            display: block;
            background-color: blue;
            width: 333px;
            height: 111px;
            }
        </style>
        <div id="div-css-styled"></