:root { color-scheme: light dark; --bg: #f7f7f5; --text: #1d1d1b; --dim: #6b6b66; }
@media (prefers-color-scheme: dark) { :root { --bg: #141413; --text: #ecebe6; --dim: #9a9993; } }
html, body { height: 100%; margin: 0; }
body {
  display: grid;
  place-items: center;
  background: var(--bg);
  color: var(--text);
  font: 18px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}
main { padding: 16px; text-align: center; }
h1 { margin: 0 0 4px; font-size: 2rem; font-weight: 600; letter-spacing: -.01em; }
p { margin: 0; color: var(--dim); }