:root { color-scheme: light; font-family: system-ui, sans-serif; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; background: #f5f7fb; color: #202734; }
main { max-width: 40rem; padding: 3rem 1.5rem; text-align: center; }
h1 { font-size: clamp(2rem, 8vw, 3.5rem); }
p { line-height: 1.8; color: #4b5565; }