.sf-menu {
    position: relative;
    margin: 0;
    padding: 0;
    list-style: none;
}

.sf-menu .sf-mega {
    position: absolute;
    display: none;
    top: 100%;
    z-index: 99;
}

.sf-menu > li {
    float: left;
}

.sf-menu li:hover > .sf-mega,
.sf-menu li.sfHover > .sf-mega {
    display: block;
}

.sf-menu > li > a {
    display: block;
    position: relative;
}

.sf-menu {
    float: left;
    margin-bottom: 1em;
    width: 100%;
}

.sf-menu .sf-mega {
    width: 100%; 
}

.sf-menu > li > a {
    text-decoration: none;
    zoom: 1; /* IE7 */
}

.sf-menu > li {
    -webkit-transition: background .2s;
    transition: background .2s;
}

.sf-menu > li:hover,
.sf-menu > li.sfHover {
    -webkit-transition: none;
    transition: none;
}

.sf-mega {
    padding: 1em;
    box-sizing: border-box;
    width: 100%;
}