/* responsive adjustments */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    flex-direction: column;
    background: #004a91;
    position: absolute;
    top: 60px;
    right: 0;
    width: 200px;
  }
  .nav-menu.open {
    display: flex;
  }
  .burger {
    display: block;
  }
}