.navbar-nav .sub-menu  {
    padding-left: 0;
    padding-top: 25px !important;
    padding-bottom: 20px !important;
    background-color: rgba(0, 0, 0, 0.65) !important;
}
header nav .menu-item-has-children .sub-menu .menu-item a {
    margin-left: 0 !important;
}
.navbar-nav .sub-menu li {
    background-color: transparent !important;
    padding-left: 30px;
}

.navbar-nav .sub-menu li:before {
    display: none !important;
}

header nav .menu-item-has-children:hover, 
header nav .menu-item-has-children:focus {
    border: 0 !important;
    padding-top: 27px !important;
}

@media screen and (max-width: 767px) {
    .navbar-nav .sub-menu  {
        position: relative !important;
        top: 0 !important;
        padding-top: 0 !important;
        padding-bottom: 50px !important;
        background-color: rgba(0, 0, 0, 1) !important;
    }
}