:root{font-family:system-ui,-apple-system,sans-serif}body{color:#111;background:#f7f7f7;margin:0;padding:2rem}main{background:#fff;border-radius:12px;max-width:720px;margin:0 auto;padding:2rem;box-shadow:0 8px 24px #00000014}h1{margin-top:0}