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

.nodes circle {
  stroke: #fff;
  stroke-width: 1.5px;
  z-index: 0;
}

text {
  font-family: sans-serif;
  font-size: 11px;
}

.active {
  fill: red;
  opacity: 1
}

#force {
  position: absolute;
  bottom: 0;
}