:root { color-scheme: light dark; }
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  display: grid;
  place-items: center;
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: #ffffff;
  color: #14181f;
  padding: 1.5rem;
}
main { text-align: center; }
h1 {
  margin: 0 0 .5rem;
  font-size: clamp(1.75rem, 6vw, 3rem);
  font-weight: 650;
  letter-spacing: -0.02em;
}
p { margin: 0; opacity: .62; font-size: clamp(.95rem, 2.5vw, 1.05rem); }
@media (prefers-color-scheme: dark) {
  body { background: #0b0d10; color: #e9edf2; }
}