:root {
  color-scheme: light dark;
  --bg: #f7f6f2;
  --fg: #1d1d1b;
  --muted: #6b6a66;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #151515; --fg: #ececea; --muted: #9a9995; }
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  display: grid;
  place-items: center;
  background: var(--bg);
  color: var(--fg);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  text-align: center;
}
h1 {
  margin: 0 0 .5rem;
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}
p { margin: 0; color: var(--muted); font-size: 1.125rem; }