#top-menu li a:before{content:"";position:absolute;z-index:-5;left:0;right:100%;bottom:50%;background:#15bf86;height:3px;-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%}