.iso.face.bottom {
  fill: brown;
}

.iso.outline {
  stroke: #333;
  fill: none;
  vector-effect: non-scaling-stroke;
}

.vis:hover .pipedon:not(:hover) * {
  opacity: 0.3;
}

.label {
  pointer-events: none;
  text-anchor: middle;
  font-family: Impact;
}