.leaflet-zoom-box-control a{
    background-image: url(/icons/Zoom_in_tool_24.png);
    font-size: 16px;
 }
.leaflet-zoom-box-control.active a {
    background-image: url(/icons/Zoom_in_tool_24.png);
    box-shadow: 0 0 8px rgba(10,10,10,1.0);
//    color: #FFF;
//    background: #666;
}
.leaflet-zoom-box-crosshair {
    cursor: crosshair !important;
}