l#border-width-properties" />
        <meta name="flags" content="ahem" />
        <meta name="assert" content="The 'border-bottom-width' property supports a minimum length value in 'ex' units that sets the width of the bottom border." />
        <style type="text/css">* { margin: 0; padding: 0 }
            div
            {
                border-bottom-style: solid;
                border-bottom-width: 0ex;
                border-bottom-color: red;
                font: 20px/1 Ahem;
           