@media screen and (max-width: 767px) {
    .drawer-open {
        overflow-y: hidden;
    }
    .drawer .navbar-toggle:hover, .drawer .navbar-toggle:focus {
        background-color: transparent;
    }
    .drawer .navbar-brand {
        padding-left: 10px;
    }
    .drawer + .navbar-collapse {
        background-color: inherit;
        box-shadow: 0 10px 10px 3px rgba(0, 0, 0, 0.2);
        left: 0;
        min-height: 100%;
        position: fixed;
        top: 0;
        transition: 0.2s;
        width: 240px;
    }

    .drawer + .navbar-collapse.in {
        z-index: 2048;
    }
}
}