:root {
  color-scheme: light dark;
  --text: #1c1c1e;
  --muted: #6c6c70;
  --background: #ffffff;
  --rule: #e5e5ea;
  --link: #007aff; /* docs/design/tokens.json color.accent.ios-light */
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #f2f2f7;
    --muted: #aeaeb2;
    --background: #000000;
    --rule: #38383a;
    --link: #0a84ff; /* color.accent.ios-dark */
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

header,
main,
footer {
  max-width: 42rem;
  margin: 0 auto;
  padding: 0 16px;
}

header {
  padding-top: 24px;
}

main {
  overflow-wrap: anywhere;
  padding-bottom: 32px;
}

footer {
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 15px;
  padding-top: 16px;
  padding-bottom: 32px;
}

a {
  color: var(--link);
}

.brand {
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

h1 {
  font-size: 32px;
  line-height: 1.2;
}

h2 {
  font-size: 22px;
  margin-top: 32px;
}

.updated {
  color: var(--muted);
}