:root { color-scheme: dark; }
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  background: #000;
  color: #ededed;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { text-align: center; padding: 2rem; }
h1 {
  margin: 0;
  font-size: clamp(2.75rem, 9vw, 4.5rem);
  font-weight: 600;
  letter-spacing: -0.04em;
}
::selection { background: #ededed; color: #000; }