@media screen and (max-width:980px) {
    .letter-link {
	font-size: 175%;
  }
}
@media screen and (max-width:800px) {
    .letter-link {
	font-size: 150%;
  }
}
@media screen and (max-width:720px) {
    .letter-link {
	font-size: 125%;
  }
}
@media screen and (max-width:480px) {
    .row {
        display: block;
    }
}