html { color-scheme: light dark; }
body { margin: 0; min-height: 100vh; display: flex; align-items: center; justify-content: center; font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { padding: 24px; text-align: center; }
h1 { font-size: 28px; font-weight: 500; margin: 0 0 8px; }
p { margin: 0; opacity: 0.7; }