a {
  text-decoration: none;
  font-size: 28px;
  color: #000;
}

a:hover {
  color: #F00;
}

a:hover:after {
  content: attr(alt);
}

a:hover:after, a:focus:after {
  display: block;
  content: attr(alt);
  color: #000;
  position: absolute;
  left: 15px;
}