.link {
  fill: none;
  stroke: #ccc;
  stroke-width: 1.5px;
}

circle {
  fill: #100;
}

text {
  fill: #000;
}

.node circle {
  fill: #fff;
  stroke: black;
  stroke-width: 0.5px;
  cursor: pointer;
}

.node,
text {
  font: 7px sans-serif;
}