nav {
  position: fixed;
  top: 0; right: 0;
  width: 379.5px; height: 50px;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  z-index: 3;
}

nav a {
  position: relative;
  display: inline-block;
  font-size: 1em;
  font-weight: 500;
  color: white;
  text-decoration: none;
  padding: 0 23px;
  font-family: Helvetica, Arial, sans-serif;
}

nav span{
  position: absolute;
  top: 0; left: 0;
  width: 95px; height: 2px;
  background: white;
  border-radius: 10px;
  transition: 0.5s;
}

pre.IP_SN {
  position: fixed;
  top: 200px; 
  right: -60px; 
  font-family: monospace;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.65);
  transform: rotate(90deg);
}