.nodeButton {
  font-size: 1rem;
  position: absolute;
  visibility: hidden;
  z-index: 1000;
  text-shadow: -1px 0 white, 0 1px white, 1px 0 white, 0 -1px white;
  &:hover {
    font-weight: bold;
  }
  &:active {
    stroke-width: 8;
  }
}