.img-col {
  height: 15em;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
  background-position: 50% 50%;

  -webkit-box-shadow: 0px 0px 5px 0px rgba(0,0,0,0.58);
  -moz-box-shadow: 0px 0px 5px 0px rgba(0,0,0,0.58);
  box-shadow: 0px 0px 5px 0px rgba(0,0,0,0.58);
  
  border: 0.25em solid #FFF;
  margin-top: 1.5em;
  cursor: pointer;
}

#gallery-overlay {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  /* Prevent artifacts in Mozilla Firefox: */
  -moz-backface-visibility: hidden;
  background-color: rgba(0,0,0,0.5);
  z-index: 1000000;
}

#gallery-content {
  position: fixed;
  top: 50px;
  right: 0px;
  bottom: 0px;
  left: 0px;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: 50% 50%;
}

#gallery-backdrop {
  position: fixed;
  top: 50px;
  right: 0px;
  bottom: 0px;
  left: 0px;
  background-color: #222;
}

#gallery-prev {
  left: 35px;
  top: 50%;
}
#gallery-next {
  right: 35px;
  top: 50%;
}

#gallery-next,
#gallery-prev {
  position: fixed;
  width: 60px;
  height: 80px;
  margin-top: -30px;
  font-family: 'Yanone Kaffeesatz', Helvetica, Arial, sans-serif;
  font-size: 60px;
  font-weight: 100;
  --line-height: 40px;
  color: #fff;
  text-decoration: none;
  text-shadow: 0 0 2px #000;
  text-align: center;
  opacity: 0.8;
  cursor: pointer;
}

#gallery-close {
  position: fixed;
  right: 35px;
  top: 18px;
  width: 50px;
  height: 50px;
  font-size: 55px;
  font-weight: 100;
  --line-height: 40px;
  color: #E83A00;
  text-decoration: none;
  text-shadow: 0 0 2px #000;
  text-align: center;
  --opacity: 0.5;
  cursor: pointer;
  z-index: 1000002;
}