lygon,
.edge:hover polygon,
.edge.current polygon {
  stroke: fuchsia;
  stroke-width: 3;
  fill: fuchsia;
  stroke-opacity: 1;
  fill-opacity: 1;
}

.edge:active text,
.edge:hover text {
  fill: fuchsia;
}

.cluster path {
  stroke-width: 3;
}

.cluster:active path,
.cluster:hover path {
  fill: #ffff0011;
}

div.hint {
  background-color: #000000aa;
  color: white;
  font-family: Arial, Helvetica, sans-serif;
  border-radius: 1rem;
  position: fixed;
  top: calc(50% - 4em);
  right: calc(50% - 10em);
  bo