.main_catalog_nav_panel {
    position: fixed;
    top: 67px;
    bottom: 0;
    left: 0;
    transform: translateX(-110%);
    transition: transform .25s;
    z-index: 101;
    margin: 0;
    max-width: 340px;
    pointer-events: none;
    overflow-y: auto;
    overflow-x: hidden; 
}

.main_catalog_nav_panel._active {
    transform: translateX(0);
    pointer-events: auto;
}

.catalog_nav_head_btn {
    display: none;
}