html {
}

body {
  font-family: sans-serif;
  margin: 0;
}

.d3 {
}

.links {
  stroke: #000;
  stroke-opacity: 0.2;
}

.polygons {
  fill: none;
  stroke: #000;
}

.polygons :first-child {
  fill: #f00;
}

.sites {
  fill: #000;
  stroke: #fff;
}

.sites :first-child {
  fill: #fff;
}
html, body { width: 100%; height: 100%; margin: 0; overflow: hidden; }
svg { display: block; touch-action: none; }