.jumpbuttons .column a,
.jumpbuttons .column a:visited {
  min-height: 50px;
  text-align:center;
  display: block;
  font-size: 20px;
  line-height: 50px;
  color: #fff;
  text-decoration: none;
  background-color: rgba(255,255,255,0);
  -webkit-transition: background 500ms ease-in-out;
  -moz-transition: background 500ms ease-in-out;
  -ms-transition: background 500ms ease-in-out;
  -o-transition: background 500ms ease-in-out;
  transition: background 500ms ease-in-out;
}
.jumpbuttons .column a:hover {
  background-color: rgba(255,255,255,0.2); 
}

/* Small Devices, Tablets */
@media only screen and (min-width : 768px) {
  .jumpbuttons .column a,
  .jumpbuttons .column a:visited {
    min-height: 100px;
    font-size: 22px;
    line-height: 35px;
  }
}