.node rect {
  cursor: move;
  fill-opacity: .9;
  shape-rendering: crispEdges;
}

.node text {
  pointer-events: none;
  fill: #555;
}

.active text {
pointer-events: none;
fill: #f00;
 stroke: #f00;
 }

.link {
  fill: none;
  stroke: #222;
  stroke-opacity: .2;
}

.link:hover {
  stroke-opacity: .5;
}