.node rect {
  fill-opacity: .8;
  shape-rendering: crispEdges;
}
.node text {
  pointer-events: none;
}
.link {
  fill: none;
  stroke: #127bca;
  stroke-opacity: .2;
}
.link:hover {
  stroke-opacity: .6;
}
.link-highlight {
  stroke-opacity: .4;
}