@media (max-width:768px){
  html body header.header nav#nav.nav.is-open{
    opacity:1!important;
    visibility:visible!important;
    pointer-events:auto!important;
    display:flex!important;
  }
  html body header.header nav#nav.nav.is-open .nav-dropdown[open]>.nav-dropdown__menu{
    display:grid!important;
    visibility:visible!important;
    opacity:1!important;
    pointer-events:auto!important;
  }
}