svg {
  width: 100%;
  height: 100%;
}

.links line {
  stroke: #546e7a;
  stroke-opacity: 0.6;
}

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

.nodes circle title {
  fill: yellow;
}

.links {
  stroke: #546e7a;
  stroke-opacity: 0.6;
}

.nodes {
  stroke: #fff;
  stroke-width: 1.5px;
}

.nodes title {
  fill: yellow;
}