body {
  max-width: 48rem;
  margin: 2rem auto;
  padding: 0 1rem;
  color: #111;
  background: #efefef;
  font: 16px/1.75 system-ui, sans-serif;
}

main {
  border: 1px solid #999;
  padding: 1rem 1.25rem;
  background: #fff;
}

h1,
h2 {
  line-height: 1.35;
}

a {
  color: #0000ee;
}

code {
  overflow-wrap: anywhere;
}