.dui-submenu-container {
  background-color: transparent;
  height: 0;
  opacity: 0;
  transition: height 200ms ease-in-out 1ms, opacity 100ms ease-in-out 50ms,
    background-color 100ms ease-in-out 0ms;
}

@media (max-width: 991px) {
  .dui-submenu-container.mobile {
    position: absolute;
    z-index: 0;
  }
}