path.link {
  fill: #1f460a;
  stroke: #1f460a;  
  stroke-width: 1px;
}

circle {
  stroke-width: 1.5px;
}

circle.type_1 {
  stroke: #233a0b;
  fill: #214121;  
}

circle.type_2 { 
  fill: #2F902E; 
  stroke: #307230;  
}

circle.type_3 {
  stroke: #71bd71;
  fill: #99dc99;  
}

text {
  font: 9px sans-serif;
  pointer-events: none;
}

text.shadow {
  stroke: #fff;
  stroke-width: 3px;
  stroke-opacity: .9;
}