@media (max-width: 900px) {
  #desktop-nav {
    display: none !important;
  }
  #hamburger-nav {
    display: flex !important;
  }
}

@media (min-width: 901px) {
  #desktop-nav {
    display: flex !important;
  }
  #hamburger-nav {
    display: none !important;
  }
}