.nav-dropdown::after {
  content: "";
  position: absolute;
  top: 100%;
  left: -16px;
  right: -16px;
  height: 20px;
  z-index: 1000;
}

.nav-dropdown-menu,
.nav-mega-menu,
header.scrolled .nav-dropdown-menu {
  top: 100%;
  margin-top: 0;
}

.nav-dropdown-menu::before,
header.scrolled .nav-dropdown-menu::before {
  top: -16px;
  height: 16px;
}