body {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 13px;
  padding: 30px;
}

h1 {
  margin-top: 0;
  font-size: 1.2rem;
}

.source {
  font-size: 10px;
  color: #888;
}
.source a {
  color: #888;
}

line {
  stroke: #000;
}

text {
  pointer-events: none;
}