nav {
  white-space: nowrap;
  cursor: pointer;
  z-index: 1
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 0
}

@media (min-width:600px) {

  nav .AutoHide,
  #MenuIco {
    display: none
  }

  nav ul {
    display: flex
  }

  nav ul li {
    padding-right: 10px
  }

  nav ul ul ul {
    display: none
  }

  nav ul ul li:hover>ul {
    display: block;
    position: absolute;
    top: 26px
  }

  nav ul ul ul li {
    padding: 8px
  }

  nav ul ul ul ul {
    left: 100px
  }
}

@media (max-width:600px) {
  nav ul ul {
    display: none
  }

  nav ul li:hover>ul {
    display: block;
    position: absolute;
    top: 26px
  }

  nav ul ul li {
    border: solid 1px #fff;
    padding: 5px
  }

  nav ul ul ul {
    position: inherit !important;
    padding-top: 5px
  }

  nav ul ul ul ul {
    display: none
  }
}

@media (min-width:600px) and (prefers-color-scheme:dark) {
  nav ul ul ul {
    background-color: #2b2a2a
  }

  nav ul ul ul li {
    border: solid 1px #fff
  }

  nav ul ul ul li:hover {
    background-color: #3f4777
  }
}

@media (max-width:600px) and (prefers-color-scheme:dark) {
  nav ul li ul {
    background-color: #2b2a2a
  }

  nav ul ul ul li {
    border: solid 1px #fff
  }
}

@media (min-width:600px) and (prefers-color-scheme:light) {
  nav ul ul ul {
    background-color: #e4e4e4
  }

  nav ul ul ul li {
    border: solid 1px #000
  }

  nav ul ul ul li:hover {
    background-color: #87CEEB
  }
}

@media (max-width:600px) and (prefers-color-scheme:light) {
  nav ul li ul {
    background-color: #e4e4e4
  }

  nav ul ul ul li {
    border: solid 1px #000
  }
}