.main-menu .nav > li:last-child {
    float: right !important;
    border-right: none;
}

.main-menu .nav > li:last-child a {  
    background-color: var(--primary) !important;
}
.main-menu .nav > li:last-child a:hover, .main-menu .nav > li.active:last-child a {  
    color : #000 !important;
}