body {
  margin: 0;
  background: #fff;
  color: #1a1a1a;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.5;
}

header {
  padding: 1rem;
}

header img {
  display: block;
  height: 2.5rem;
  width: auto;
}

main {
  max-width: 50rem;
  margin: 0 auto;
  padding: 2rem 1rem;
  overflow-wrap: break-word;
}

footer {
  padding: 1rem;
  border-top: 1px solid #d9d9d9;
  font-size: 0.875rem;
  text-align: center;
}

h1 {
  margin: 0 0 1.5rem;
  font-size: 1.25rem;
  text-align: center;
}

h2 {
  margin: 2rem 0 1rem;
  font-size: 1.125rem;
}

p {
  margin: 0 0 1rem;
}

ol,
ul {
  margin: 0 0 1rem;
  padding-left: 2.25em;
}

li {
  margin-bottom: 1rem;
}

li > :last-child {
  margin-bottom: 0;
}

ul {
  list-style-type: disc;
}

ul > li {
  margin-bottom: 0.25rem;
}

a {
  color: #0645ad;
  overflow-wrap: anywhere;
}

.preamble {
  font-weight: bold;
}

.u {
  text-decoration: underline;
}

@media (max-width: 30em) {
  /* 16px -> 13px base; every rem size scales with it */
  html {
    font-size: 81.25%;
  }

  ol,
  ul {
    padding-left: 1.75em;
  }
}