.node circle {
  fill: #69b3a2;
  stroke: #333;
  stroke-width: 1.5px;
}

.link {
  fill: none;
  stroke: #999;
  stroke-opacity: 0.6;
  stroke-width: 1.5px;
}

text {
  font-family: Arial, sans-serif;
  font-size: 12px;
  pointer-events: none;
}