*{box-sizing:border-box}body{color:#e2e8f0;background:#0f172a;margin:0;font-family:Arial,Helvetica,sans-serif}input,select,textarea,button{font:inherit}.page{max-width:960px;margin:0 auto;padding:32px 24px 64px}.card{background:#111827;border:1px solid #1f2937;border-radius:12px;margin-top:16px;padding:20px}.row{grid-template-columns:1fr;gap:16px;display:grid}@media (min-width:900px){.row{grid-template-columns:1fr 1fr}}.row button{width:100%}label{margin-bottom:6px;font-weight:600;display:block}input,select,textarea{color:#e2e8f0;background:#0b1220;border:1px solid #334155;border-radius:8px;width:100%;padding:10px 12px}textarea{resize:vertical;min-height:220px}button{color:#fff;cursor:pointer;background:#3b82f6;border:0;border-radius:8px;padding:10px 16px;font-weight:600}button:disabled{opacity:.6;cursor:not-allowed}.muted{color:#94a3b8;font-size:.9rem}.response{white-space:pre-wrap;background:#0b1220;border:1px solid #334155;border-radius:8px;padding:16px}.error{color:#fca5a5}