@media screen and (min-width: 1024px) {
  header .submenu-helper {
    box-shadow: inset 0 -2px 0 #c9c7c3;
  }

  header .submenu-helper::before {
    background: linear-gradient(
      to bottom,
      #f1f0ee 0,
      #f1f0ee calc(100% - 2px),
      #c9c7c3 calc(100% - 2px),
      #c9c7c3 100%
    );
  }
}