:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:#111;background:#fafafa}.container{max-width:980px;margin:32px auto;padding:0 16px}.card{background:#fff;border:1px solid #e6e6e6;border-radius:10px;padding:16px;margin-bottom:16px}.row{display:flex;gap:12px;flex-wrap:wrap}label{display:block;font-size:14px;margin-bottom:6px}select,input[type=file],button{padding:10px;border-radius:8px;border:1px solid #ccc;background:#fff}button{cursor:pointer}pre{overflow:auto;background:#0b1020;color:#e6e6e6;padding:12px;border-radius:8px;font-size:12px}