path { 
    stroke: steelblue;
    stroke-width: 1;
    fill: none;
}

.axis path,
.axis line {
  fill: none;
  stroke: black;
}

line {
    shape-rendering: crispEdges;
}
.axis text {
  font-family: sans-serif;
  font-size: 10px;
}

h1, h2, h3, p {
  font: times;
}

h1 {
  text-align: center;
}

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  /* width: 50%; */
}