body {
    background-color: white;
}

h2 {
  font-family: "Open Sans", sans-serif;
}

#chart {
  height: 650px; /* must at least match the svg, to place content after it!*/
}

.node rect {
  cursor: move;
  fill-opacity: .9;
  shape-rendering: crispEdges;
}

.node text {
  pointer-events: none;
  font-family: "Open Sans", sans-serif; 
}

.link {
  fill: none;
  stroke-opacity: .5;
}

.link:hover {
  stroke-opacity: .8;
}