.chart {
  font-family: Verdana,Geneva,sans-serif;
  font: 15px sans-serif;
}

.chart .heading {
  font: 18px sans-serif;
}

.axis {
  font: 14px sans-serif;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  stroke-width: 2px;
  shape-rendering: crispEdges;
}

.x.axis path {
  /*display: none;*/
}

.line {
  fill: none;
  stroke: steelblue;
  stroke-width: 2.5px;
}

.overlay {
  fill: none;
  pointer-events: all;
}

.focus circle {
  fill: none;
  stroke: steelblue;
}