html {
  margin: 0;
  padding: 0;
  -webkit-text-size-adjust: none;
}
body {
  margin: 2rem auto;
  padding: 0 1rem;
  background: white;
  color: black;
  max-width: 72ch;
  line-height: 1.5rem;
}

.center {

}
h1 {
text-align: center;
}
h1,
h2,
h3 {
  margin-bottom: 1rem;
  margin-top: 1rem;
  font-weight: 300;
  line-height: 1.1;
  font-weight: bold !important;
}
h1 {
  margin-top: 4rem;
  font-size: 3rem;
}
h2 {
  margin-top: 3rem;
  font-size: 1.8rem;
}
h3 {
  margin-top: 2rem;
  font-size: 1.2rem;
}