.feature.map {
  height: 100%;
}
.feature.map iframe {
  height: 100%;
  width: 100%;
  border: 0;
  filter: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg'><filter id='grayscale'><feColorMatrix type='matrix' values='0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0'/></filter></svg>#grayscale");
  /* Firefox 10+ */
  filter: gray;
  /* IE6-9 */
  -webkit-filter: grayscale(99%);
  /* Chrome 19+ & Safari 6+ */
  -webkit-backface-visibility: hidden;
  /* Fix for transition flickering */
}