.leaflet-control-fullscreen a {
  background-size: 100%;
  background:#fff url(./expand.png) no-repeat 0 0;
  }
  .leaflet-touch .leaflet-control-fullscreen a {
    background-position: 0px 0px;
    }
  .leaflet-fullscreen-on .leaflet-control-fullscreen a {
    background-position:0px 0px;
    background:#fff url(./minimise.png) no-repeat 0 0;
    }
  .leaflet-fullscreen-on:hover .leaflet-control-fullscreen:hover a:hover {
    background: #f4f4f4 url(./minimise.png) no-repeat 0 0 !important;
  }
  .leaflet-fullscreen-on .leaflet-control-fullscreen a {
    background-position: 0px 0px; 
  }
  .leaflet-touch.leaflet-fullscreen-on .leaflet-control-fullscreen a {
    background-position: 0px 0px;
    }

/* Do not combine these two rules; IE will break. */
.leaflet-container:-webkit-full-screen {
  width:100%!important;
  height:100%!important;
  }
.leaflet-container.leaflet-fullscreen-on {
  width:100%!important;
  height:100%!important;
  }

.leaflet-pseudo-fullscreen {
  position:fixed!important;
  width:100%!important;
  height:100%!important;
  top:0!important;
  left:0!important;
  z-index:99999;
  }

@media
  (-webkit-min-device-pixel-ratio:2),
  (min-resolution:192dpi) {
    .leaflet-control-fullscreen a {
      background-image:url(../icons/expand.png);
    }
  }