:root { --bg: #f6f5f1; --ink: #1b1d20; --muted: #5b5f66; }
@media (prefers-color-scheme: dark) { :root { --bg: #15171a; --ink: #eceae4; --muted: #a3a7ad; } }
body {
  margin: 0; min-height: 100vh; display: grid; place-items: center;
  background: var(--bg); color: var(--ink);
  font: 1.125rem/1.5 system-ui, -apple-system, sans-serif;
}
main { max-width: 32rem; padding: 2rem 1rem; }
h1 { margin: 0 0 .5rem; font-size: 2rem; }
p { margin: 0; color: var(--muted); }
a { color: inherit; }
nav { display: flex; gap: .75rem; margin-top: 1.5rem; }
nav a {
  padding: .6rem 1.1rem; border: 1px solid currentColor; border-radius: .5rem;
  text-decoration: none; font-weight: 600;
}