.d3js-map body {
  background: black;
}
.d3js-map  path.country{
    stroke: black;
}    
.d3js-map text {
  font: bold 20px monospace;
  fill: white;
  text-anchor: middle;
}
.d3js-map rect {
  fill: black;
  fill-opacity: 0.7;
}
.d3js-map .country-SOM {
  stroke: transparent !important;
}
#zoom_in, #zoom_out {
  cursor: pointer;
}
#zoom_in rect,
#zoom_out rect {
  fill: none;
}