.nav-link {
  display: block;
  text-align: left;
  font-family: 'Open Sans', sans-serif;
  font-size: 16px;
  line-height: 1.5;
  text-transform: none;
}

@media (max-width: 767px) {
  header .nav-link {
    text-align: right; 
    font-family: 'Oswald', sans-serif;
    font-size: 30px;
    line-height: 1;
    text-transform: uppercase;
  }
}