/* first level */
#block-system-main-menu {
    /*background-color: #ccc;*/
}
#block-system-main-menu li.main-row {
    position: relative;
    float:left;
    /*height: 20px;*/
    padding:5px 10px;
    /*background-color: #fff;*/
    list-style-image:none;
    list-style-type:none;
    margin:0;
    margin-right:3px;
}

/* pulldowns */
#block-system-main-menu li.main-row ul.submenu {
    position:absolute;
    top:30px;
    left:-10px;
    background-color: #fff;
    box-shadow: 0px 1px 3px #777;
    width:220px;
    padding:10px;
    display:none;
    z-index:999;
}