main.css

/* Add styles here */

body {
  margin: 40px auto;
  width: 100%;
  text-align: center;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-weight: normal;
  color: #333;
}

.notes {
  max-width: 730px;
  margin: 0 auto;
  padding-top: 2em;
  font-size: 12px;
  clear: both;
  color: #777;
}

.bar {
  shape-rendering: crispEdges;
  fill: #ccc;
}

.bar.below {
  fill: #888;
}

svg {
  font-size: 10px;
}
.exits {
  display: none; /* todo - display exits? */
  stroke-width: 0.5px;
  stroke: black;
}

path {
  stroke: black;
  stroke-opacity: 0.3;
  stroke-width: 0.5px;
}

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

.line {
  /*shape-rendering: crispEdges;*/
  /*stroke-width: 1.5px;*/
}

/* D3-tip styles */

.d3-tip {
  line-height: 1;
  font-weight: bold;
  padding: 10px;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  border-radius: 2px;
  pointer-events: none;
  font-size: 10px;
  text-align: left;
}

/* Creates a small triangle extender for the tooltip */
.d3-tip:after {
  box-sizing: border-box;
  display: inline;
  font-size: 15px;
  width: 100%;
  line-height: 1;
  color: rgba(0, 0, 0, 0.8);
  position: absolute;
  pointer-events: none;
}

/* Northward tooltips */
.d3-tip.n:after {
  content: "\25BC";
  margin: -3px 0 0 0;
  top: 100%;
  left: 0;
  text-align: center;
}

/* Eastward tooltips */
.d3-tip.e:after {
  content: "\25C0";
  margin: -6px 0 0 0;
  top: 50%;
  left: -12px;
}

/* Southward tooltips */
.d3-tip.s:after {
  content: "\25B2";
  margin: 0 0 1px 0;
  top: -8px;
  left: 0;
  text-align: center;
}

/* Westward tooltips */
.d3-tip.w:after {
  content: "\25B6";
  margin: -4px 0 0 -1px;
  top: 50%;
  left: 100%;
}