:root {
  color-scheme: light dark;
  --ink: #1c1c1e;
  --muted: #6c6c70;
  --bg: #f2f2f7;
  --card: #ffffff;
  --link: #007aff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f5f5f7;
    --muted: #98989d;
    --bg: #000000;
    --card: #1c1c1e;
    --link: #0a84ff;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font: 17px/1.5 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
}

main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

.brand {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 1.5rem;
}

.brand a { color: inherit; text-decoration: none; }

h1 {
  font-size: 1.75rem;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin: 0 0 0.5rem;
}

h2 {
  font-size: 1.125rem;
  margin: 1.75rem 0 0.5rem;
}

.meta {
  color: var(--muted);
  font-size: 0.875rem;
  margin: 0 0 1.25rem;
}

p, li { margin: 0 0 0.85rem; }

ul { padding-left: 1.2rem; }

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

.nav { margin-top: 2rem; }