nav{
  text-align: center;
  z-index: 1;
  position: absolute;
  left: 0;
  top: 0px;
  height: 7 vmin;
  width: 100%;
  background-color: white;
}

nav a{
  display: inline-block;
  margin-top: 1vmin;
  font-family: Futura;
  color: grey;
  
}

.active{
  color: blue;
}