:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1c1e21;
  --muted: #5c6470;
  --rule: #e3e6ea;
  --link: #1a5fb4;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181c;
    --fg: #e6e8eb;
    --muted: #9aa3ad;
    --rule: #2c3037;
    --link: #79b0ff;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 3rem 1.25rem 4rem;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-text-size-adjust: 100%;
}

main {
  max-width: 40rem;
  margin: 0 auto;
}

h1 {
  font-size: 1.9rem;
  line-height: 1.25;
  margin: 0 0 1.5rem;
}

h2 {
  font-size: 1.15rem;
  margin: 2rem 0 0.5rem;
}

p {
  margin: 0 0 1rem;
}

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

a:hover {
  text-decoration: none;
}

.updated {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 1.75rem;
}

nav {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
}