:root{color-scheme:light dark;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}body{margin:0;display:flex;justify-content:center;padding:2rem 1rem}.page{width:100%;max-width:640px}.card{border:1px solid #8888;border-radius:8px;padding:1rem 1.5rem;margin-top:1.5rem}.ok{color:#1a7f37;font-weight:600}.fail{color:#cf222e;font-weight:600}pre{background:#8881;padding:.75rem;border-radius:6px;overflow-x:auto}