path.link {
  fill: none;
  stroke: #666;
  stroke-width: 1.5px;
}

marker#data {
  fill: green;
}

path.link.data {
  stroke: green;
  stroke-dasharray: 5, 5, 1, 5;
}

marker#qc {
  fill: red;
}

path.link.qc {
  stroke-dasharray: 0,2 1;
  stroke: red;
}

circle {
  fill: #ccc;
  stroke: #333;
  stroke-width: 1.5px;
}

text {
  font: 10px sans-serif;
  pointer-events: none;
}

text.shadow {
  stroke: #fff;
  stroke-width: 3px;
  stroke-opacity: .8;
}