.dropdown-menu {
    margin-top: 0;
}

    .dropdown-menu .dropdown-toggle::after {
        vertical-align: middle;
        border-left: 4px solid;
        border-bottom: 4px solid transparent;
        border-top: 4px solid transparent;
    }

    .dropdown-menu .dropdown .dropdown-menu {
        left: 100%;
        top: 0%;
        margin: 0 20px;
        border-width: 0;
    }

    .dropdown-menu > li a:hover,
    .dropdown-menu > li.show {
        background: #007bff;
        color: white;
    }

        .dropdown-menu > li.show > a {
            color: white;
        }

@media (min-width: 768px) {
    .dropdown-menu .dropdown .dropdown-menu {
        margin: 0;
        border-width: 1px;
    }
}