/* Styles go here */

.links line {
  stroke: #999;
  stroke-opacity: 0.6;
}

.nodes circle {
  stroke: #fff;
  stroke-width: 1.5px;
}

div.tooltip {   
  position: absolute;           
  text-align: center;               
  padding: 2px;             
  font: 12px sans-serif;        
  background: lightsteelblue;   
  border: 0px;      
  border-radius: 8px;           
  pointer-events: none;         
}