.is-dark {
  background-color: rgb(161, 156, 157);
  background-image: linear-gradient(rgba(222, 222, 222, 0.6),rgba(48, 48, 48, 0.6)),linear-gradient(rgba(0, 0, 0, 0.6),rgba(0, 0, 0, 0.6)), url('https://images.unsplash.com/photo-1446825597988-2bb4dfd264ac?dpr=1&auto=format&fit=crop&w=1500&h=1001&q=80&cs=tinysrgb&crop=');
}
.navbar-item {
  font-weight: bold;
  text-transform: uppercase;
}
.navbar-item .button{
  font-weight: bold;
  text-transform: uppercase;
  background-color: transparent;
  border: 2px solid #fff;
  padding: 10px 20px;
  height: 45px;
}