rect {
	stroke: lightgray;
	stroke-width: 0.5;
}

.cooperator, .on {
	fill: green;
	fill: #567714;
	fill: darkgreen;
}

.defector {
	fill: red;
	fill: #801515;
	fill: brown;
}

.empty, .off {
	fill: white;
	fill: #669999;
	fill: gray;
	fill-opacity: 0.1;
}


.axis {
  font: 10px sans-serif;
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
}

.axis .domain {
  fill: none;
  stroke: #000;
  stroke-opacity: .3;
  stroke-width: 10px;
  stroke-linecap: round;
}

.axis .halo {
  fill: none;
  stroke: #ddd;
  stroke-width: 8px;
  stroke-linecap: round;
}

.slider .handle {
  fill: #fff;
  stroke: #000;
  stroke-opacity: .5;
  stroke-width: 1.25px;
  pointer-events: none;
}

.permalink {
	font-size: 70%;
}