/* https://css-tricks.com/slide-in-image-captions/ */
figure { 
  display: block; 
  position: relative; 
  overflow: hidden; 
}

figcaption { 
  position: absolute; 
  background: rgba(0,0,0,0.75); 
  color: white; 
  padding: 10px 0px; 
  text-align: center;
  opacity: 0;
  left: 0;
  bottom: -30%; 
  -webkit-transition: all 0.6s ease;
  -moz-transition:    all 0.6s ease;
  -o-transition:      all 0.6s ease;
}
figcaption a {
  color: white;
  text-decoration: underline;
}

figure:hover figcaption {
  opacity: 1;
  bottom: 0;
}

figure:before { 
  content: "?"; 
  position: absolute; 
  background: rgba(255,255,255,0.75); 
  color: black;
  width: 24px;
  height: 24px;
  bottom:10px;
  right: 10px;
  -webkit-border-radius: 12px;
  -moz-border-radius:    12px;
  border-radius:         12px;
  text-align: center;
  font-size: 14px;
  line-height: 24px;
  /* Only Fx 4 supporting transitions on psuedo elements so far... */
  -webkit-transition: all 0.6s ease;
  -moz-transition: all 0.6s ease;
  -o-transition: all 0.6s ease;
  opacity: 0.75;	
}
figure:hover:before {
  opacity: 0;
}