.menu-overlay{display:none}
@media(max-width:720px){
  .menu-overlay{display:block;position:fixed;inset:0;border:0;background:rgba(0,0,0,.58);opacity:0;pointer-events:none;transition:.25s;z-index:19}
  .menu-open .menu-overlay{opacity:1;pointer-events:auto}
  .menu-open{overflow:hidden}
}