body {
  margin: 0;
}
#root {
  height: 100vh;
  width: 100vw;
}
.line-group {
  stroke: #999;
  stroke-opacity: 0.6;
}
line {
  animation: dash 1s linear infinite;
  stroke-dasharray: 18 2;
  stroke-width: 2;
}

.node {
  stroke: #fff;
  stroke-width: 1.5;
}

.node:hover + .label {
  display: block;
}

.label {
  color: #333;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.75em;
  display: none;
  transform: translate(1em, 1em);
}

@keyframes dash {
  to {
    stroke-dashoffset: 20;
  }
}