.slide-menu {
    position: fixed;
    width: 100%;
    max-width: 100%;
    height: 100vh;
    top: 0;
    right: 0;
    display: none;
    overflow: hidden;
    box-sizing: border-box;
    transform: translateX(100%);
    overflow-y: auto;
    z-index: 1000;
    min-height:100%;
}

    .slide-menu, .slide-menu .slide-menu__slider {
        transition: transform .2s ease-in-out;
        will-change: transform
    }

        .slide-menu .slide-menu__slider {
            width: 100%;
            transform: translateX(0)
        }

        .slide-menu ul {
            position: relative;
            width: 100%;
            margin: 0;
            padding-left: 0;
            list-style: none
        }

            .slide-menu ul ul {
                position: absolute;
                top: 20px;
                left: 100%;
                display: none
            }

            .slide-menu ul a {
                display: block
            }

        .slide-menu a {
            cursor: pointer
        }