:root{color-scheme:dark;font-family:system-ui,-apple-system,sans-serif}body{margin:0;min-height:100dvh;display:grid;place-items:center;background:#0f172a;color:#e2e8f0}.card{text-align:center;padding:2rem}.card h1{font-size:2.5rem;margin:0 0 .5rem}.card strong{color:#4ade80}