:root { color-scheme: light dark; }
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: #f6f4ef;
  color: #1c1b19;
}
main { padding: 16px; text-align: center; }
h1 { margin: 0 0 8px; font-size: clamp(2rem, 8vw, 4rem); letter-spacing: -0.02em; }
p { margin: 0; font-size: 1.125rem; opacity: 0.7; }
@media (prefers-color-scheme: dark) {
  body { background: #161513; color: #f2efe8; }
}