svg {
  font: 10px sans-serif;
}

.pane {
    fill: transparent;
    stroke: transparent;
}

.axis {
  shape-rendering: crispEdges;
}

.axis path, .axis line {
  fill: none;
  stroke-width: .5px;
}

.x.axis line {
  stroke: #ddd;
}

.y.axis line {
  stroke: #ddd;
}