.topbar-nav ul {
    padding: 0;
    margin: 0;
    list-style: none;
}
.topbar-nav .metismenu {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
}
.topbar-nav .metismenu > li {
    -webkit-box-flex: 1;
        -ms-flex: 1 1 0%;
            flex: 1 1 0%;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
    position: relative;
}

.topbar-nav .metismenu a {
    position: relative;
    display: block;
    padding: 15px;
    outline-width: 0;
    transition: all .3s ease-out;
}

@media (min-width: 760px) {
    .topbar-nav .metismenu {
        -webkit-box-orient: horizontal;
        -webkit-box-direction: normal;
            -ms-flex-direction: row;
                flex-direction: row;
    }
    .topbar-nav .metismenu > li {
        -webkit-box-orient: vertical;
        -webkit-box-direction: normal;
            -ms-flex-direction: column;
                flex-direction: column;
    }
    .topbar-nav .metismenu > li > ul {
        position: absolute;
        top: 100%;
        min-width: 100%;
        z-index: 1001;
    }
    .topbar-nav.is-hoverable .metismenu > li > ul {      
      height: auto !important;
    }
    .topbar-nav.is-hoverable .metismenu > li:hover > ul {
        display: block;
    }
    .topbar-nav.is-hoverable .metismenu > li:hover > a.has-arrow:after {
        -webkit-transform: rotate(-135deg);
                transform: rotate(-135deg);
    }
}