.multiple-level-menu_wrapper {
    position: relative;
    transition: .5s all ease;
    &:before {
        position: absolute;
        top: 0;
        left: 0;
        z-index: -1000;
        width: 100%;
        height: 100%;
        background-color: #111;
        opacity: 0;
        transition: .5s opacity ease;
        content: '';
    }
    &.is-active {
        transform: translate(300px, 0);
        &:before {
            z-index: 10000;
            opacity: .5;
        }
    }
}

.multiple-level-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 300px;
    height: 100%;
    transform: translate(-100%, 0);
    transition: .5s all ease;
}

.multiple-level-menu_list {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    background-color: #f2f3f4;
    list-style-type: none;
    li {
        padding: 15px;
        border-bottom: 1px solid #333;
        &:hover {
            color: #fff;
            background-color: #3aa;
        }
        li {
            color: #000;
            &:hover {
                color: #fff;
            }
        }
    }
    .multiple-level-menu_list {
        position: absolute;
        top: 0;
        left: 0;
        background-color: darken(#f2f3f4, 10%);
        transform: translate(-100%, 0);
        transition: .5s all ease;
        &.is-active {
            transform: translate(0, 0);
        }
    }
}

.multiple-level-menu_trigger {
    position: absolute;
    top: 0;
    right: 0;
    z-index: 100;
}