Divi menüpontok aláhúzása

Style.css

#top-menu .current-menu-item a::before,
#top-menu .current_page_item a::before {
 content: "";
 position: absolute;
 z-index: 2;
 left: 0;
 right: 0;
}
#top-menu li a:before {
 content: "";
 position: absolute;
 z-index: -2;
 left: 0;
 right: 100%;
 bottom: 50%;
 background: #fff; /*** Az aláhúzás színe Fehér: #fff, Fekete:#000 ***/
 height: 3px; /*** A vonal nagysága ***/
 -webkit-transition-property: right;
 transition-property: right;
 -webkit-transition-duration: 0.3s;
 transition-duration: 0.3s;
 -webkit-transition-timing-function: ease-out;
 transition-timing-function: ease-out;
}
#top-menu li a:hover {
 opacity: 1 !important;
}
#top-menu li a:hover:before {
 right: 0;
}
#top-menu li li a:before {
 bottom: 10%;
}