ffmap-backend/html/force.css

.node ellipse {
  fill: #fff;
  stroke-width: 2.5px;
}

.node text {
  font-size: 10px;
  color: #333;
}

line.link {
  stroke: #333;
  stroke-opacity: 1;
}

#chart, #chart svg {
  display: block;
  vertical-align: middle;
}