.wm-menu-toggle{display:none!important}.wm-header .wm-nav-host,.wm-header .header-actions{display:block!important}.wm-header .wm-main-row{display:flex;flex-wrap:wrap}.wm-header .header-search{flex:1}.wm-header .hd-location{order:2;width:100%}.wm-header .wm-nav-host{order:3;width:100%}.wm-submenu-toggle{display:none!important}.wm-header #wm-primary-navigation{display:block}.wm-primary-menu{width:100%;flex-wrap:wrap;align-items:flex-start}.wm-primary-menu>li{flex:1 1 200px;min-width:0;max-width:100%;flex-wrap:wrap}.wm-primary-menu .sub-menu{display:block!important;position:static!important;flex-basis:100%;width:100%;max-height:40vh;overflow:auto}

Test