*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:#f5f5f5;color:#1a1a1a}main{max-width:640px;margin:0 auto;padding:3rem 1.5rem}.card{background:#fff;border-radius:8px;padding:1.5rem;margin-top:1.5rem;box-shadow:0 1px 3px rgba(0,0,0,.1)}.status-ok{color:#16a34a}.status-error{color:#dc2626}button{background:#1a1a1a;color:#fff;border:none;border-radius:6px;padding:.5rem 1rem;cursor:pointer;font-size:.9rem}button:hover{background:#333}