a.external-link.icon, a.external-link.no-image, a.external, a.external {
  background: url(../images/link.png) right center no-repeat;
  padding-right: 12px;
  position: relative;
}
a.mailto {
  background: url(../images/mail.png) right center no-repeat;
  padding-right: 12px;
}

.external-link[data-title]:after {
  background-color: #444;
  color: #fff;
  content: attr(data-title);
  display: inline;
  font-size: xx-small;
  font-weight: bold;
  margin: -1em 0 0 16px;
  min-width: 45em;
  opacity: 0;
  padding: .25em .5em;
  position: absolute;
  top: 50%;
  transition: all 1s ease-in-out 1s;
  visibility: hidden;
}

.external-link[data-title]:hover:after {
  opacity: 1;
  visibility: visible;
}

/* Hide link or mailto icons when printing. */
@media print {
  a.external, a.external-link, a.mailto {
    background-image: none;
    padding: 0;
  }
}