Cross-browser styling of <fieldset> and <legend> without any additional HTML elements

fieldset.css

/*
Cross-browser styling of <fieldset> and <legend> without any additional HTML elements

basic rules:
 - fieldset cannot have padding, because it would ruin the legend absolute positioning in Gecko
 - cannot use relative positioning on legend, because it does not work in Opera
 - legend cannot have padding, because it would break its 100% size in all browsers. 
    this cannot be fixed by overflow:hidden, because it is stupid in all IE
 - selector priority in IE7 is wrong (!important)
 - some emulations of paddings do not work in old browsers, but no content is ever hidden from user
*/

/* the hacking */
fieldset {
    margin: 0px; padding: 0px; display: block; position: relative; width: 100%;
    %border-top: none !important; /* for IE7, does not work with Webkit */
    _padding-top: 3em; } /* for IE6 */
fieldset > * {
    width: auto;
    %width: auto !important; /* for IE7 */
    margin-left: 1.5em; /* emulating fieldset padding-left */
    margin-left: 1.5em !important; } /* for IE7 */
fieldset *:first-child + * {
    margin-top: 3em; } /* emulating fieldset padding-top */
fieldset:last-child {
    margin-bottom: 1.5em; } /* emulating fieldset pading-bottom */
legend {
    width: 100%;
    %width: 100% !important; /* for IE7 */
    position: absolute;
    top: -1px; left: -1px; /* hide the fieldset border */
    margin: 0px !important; /* suppress all margin rules */
    line-height: 2em; /* emulating padding-top/bottom */
    text-indent: 1.5em; /* emulating padding-left */
    %left: -8px; } /* for IE7 */


/* user format */
fieldset, legend {
    border: 1px solid #ddd;
    background-color: #eee;
    -moz-border-radius-topleft: 5px;
    border-top-left-radius: 5px;
    -moz-border-radius-topright: 5px;
    border-top-right-radius: 5px;
    }
legend {
    font-weight: normal;
    font-style: italic;
    font-size: 1.2em;
    text-shadow: #fff 1px 1px 1px; }
fieldset {
    background-color: #f7f7f7;
    width: 360px;
    -moz-border-radius-bottomleft: 5px;
    border-bottom-left-radius: 5px;
    -moz-border-radius-bottomright: 5px;
    border-bottom-right-radius: 5px; }