:root{--bg:#f7f4ec;--text:#0f3d30;--muted:#5c6b63;--primary:#0f6e56;--surface:#fff;--stroke:#d9d4c8;--danger:#c2542e}*{box-sizing:border-box}body,html{margin:0;padding:0}body{font-family:Georgia,Times New Roman,serif;background:var(--bg);color:var(--text)}a{color:var(--primary)}.wrap{max-width:720px;margin:0 auto;padding:32px 20px 64px}.card{background:var(--surface);border:1px solid var(--stroke);border-radius:14px;padding:20px;margin:16px 0}.btn,button{background:var(--primary);color:#fff;border:0;border-radius:14px;padding:12px 16px;font-size:16px;cursor:pointer}input{width:100%;padding:12px;border:1px solid var(--stroke);border-radius:12px;margin:8px 0 14px;font-size:16px}.muted{color:var(--muted)}.row{display:flex;gap:12px;flex-wrap:wrap}.err{color:var(--danger)}.code{font-size:32px;letter-spacing:.2em;font-weight:700}