body {
  max-width: 720px;
  margin: 40px auto;
  padding: 0 20px;
  font-family: system-ui, sans-serif;
  line-height: 1.5;
  color: #111;
  background: #fff;
}

h1,
h2 {
  line-height: 1.2;
}

a {
  color: #0645ad;
}