.app{max-width:900px;margin:0 auto;padding:24px 16px 40px;font-family:Arial,sans-serif}h1{margin:0 0 20px}.card{background:#fafafa;border:1px solid #d8d8d8;border-radius:8px;margin-bottom:16px;padding:16px}h2{margin:0 0 8px;font-size:20px}.url{color:#666;word-break:break-all;margin:0 0 12px;font-size:12px}.loading{color:#0a5fd6;margin:0;font-weight:600}.error{color:#b00020;margin:0;font-weight:600}pre{background:#f1f3f5;border-radius:6px;margin:0;padding:12px;overflow-x:auto}