.zoom{
  display:inline-block;
  position:relative;
}
.zoom:after{
  content:'';
  display:block;
  width:33px;
  height:33px;
  position:absolute;
  top:0;
  right:0;
  background:url(icon.png);
}
.zoom img{ display:block; }
.zoom img::selection{ background-color:transparent; }
figcaption, #footer{ text-align:center; }
.panel-title{ font-weight:600; }
#immagine{
  margin-bottom:1em;
  height:50%;
}