/* from http://ben.balter.com/2014/03/13/pages-anchor-links/ */
.header-link {
  position: absolute;
  left: -0.5em;
  opacity: 0;

  /*
  -webkit-transition: opacity 0.2s ease-in-out 0.1s;
  -moz-transition: opacity 0.2s ease-in-out 0.1s;
  -ms-transition: opacity 0.2s ease-in-out 0.1s;
  */
}

h2:hover .header-link,
h3:hover .header-link,
h4:hover .header-link,
h5:hover .header-link,
h6:hover .header-link {
  opacity: 1;
}