:root {
  color-scheme: light dark;
  --bg: #fafaf8;
  --fg: #22221f;
  --muted: #d9d8d2;
  --link: #1f5fa8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1c1a;
    --fg: #ececE6;
    --muted: #3a3a36;
    --link: #8ab8ec;
  }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, "Hiragino Sans", "Yu Gothic UI", sans-serif;
  line-height: 1.8;
}
main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 3rem 16px 4rem;
}
h1 { font-size: 1.6rem; margin: 0 0 1rem; }
h2 {
  font-size: 1.05rem;
  margin: 2rem 0 .5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--muted);
}
a { color: var(--link); }