.mobile-wrap {
    position: relative;
    z-index: 2;
    background: #f0f0f0;
    transform: translate3d(0, 0, 0);
    transition: transform .3s ease-out;
}

.mobile-wrap.menu-open {
    -webkit-transform: translate3d(540rem / $pxConvertRem, 0, 0);
    transform: translate3d(540rem / $pxConvertRem, 0, 0);
    transition: transform .3s ease-out;
}

.overlay {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #000;
    opacity: 0.3;
    z-index: 99;
}

.overlay.show {
    display: block;
}