html, body, #map{
  height: 100%;
  margin: 0;
}

.ui-opacity {
  background:#FFF;
  position:absolute;
  left:10px;
  top:70px;
  height:200px;
  width:28px;
  border:1px solid rgba(0,0,0,0.4);
  border-radius:3px;
  z-index:1000;
}
.ui-opacity .handle {
  position:absolute;
  background:#404040;
  left:0;
  top:60px;
  width:26px;
  height:10px;
  border-radius:1px;
  cursor:pointer;
  cursor:ns-resize;
}
.ui-opacity .handle:hover {
  background:#303030;
}