:root { color-scheme: dark light; --bg: #0b0b0f; --fg: #f4f1ea; --muted: #9a968d; --line: #26262d; }
@media (prefers-color-scheme: light) { :root { --bg: #f4f1ea; --fg: #0b0b0f; --muted: #5f5b53; --line: #dcd7cc; } }
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; display: flex; flex-direction: column;
  background: var(--bg); color: var(--fg);
  font: 16px/1.6 ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}
a { color: inherit; }
header, main, footer { width: 100%; max-width: 44rem; margin: 0 auto; padding: 1.5rem 16px; }
header { display: flex; justify-content: space-between; align-items: center; }
header a { text-decoration: none; font-weight: 700; }
main { flex: 1; }
h1 { font-size: clamp(2.25rem, 8vw, 4rem); line-height: 1.05; letter-spacing: -0.03em; margin: 2rem 0 1rem; }
h2 { margin-top: 2rem; }
.lede { color: var(--muted); font-size: 1.125rem; }
.btn { display: inline-block; margin-top: 1.5rem; padding: 0.75rem 1.25rem; border: 1px solid var(--fg); border-radius: 999px; text-decoration: none; font-weight: 600; }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 0.875rem; display: flex; gap: 1rem; flex-wrap: wrap; }