/*** adding sf-vertical in addition to sf-menu creates a vertical menu ***/
.sf-vertical, .sf-vertical li { width: 100%; }
/* this lacks ul at the start of the selector, so the styles from the main CSS file override it where needed */
.sf-vertical li:hover ul,
.sf-vertical li.sfHover ul { left: 100%; /* match ul width */ top: 0; }