*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:#f7f7f8;color:#1a1a1a}.app-shell{max-width:720px;margin:0 auto;padding:32px 20px 80px}.card{background:#fff;border:1px solid #e2e2e5;border-radius:10px;padding:24px;margin-bottom:20px}.question-text{font-size:18px;font-weight:600;margin-bottom:16px}button{font-size:15px;padding:10px 18px;border-radius:6px;border:1px solid #1a1a1a;background:#1a1a1a;color:#fff;cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}button.secondary{background:#fff;color:#1a1a1a}input[type=number],textarea{width:100%;padding:10px;border-radius:6px;border:1px solid #ccc;font-size:15px;font-family:inherit}textarea{min-height:100px;resize:vertical}.chat-panel{border-top:2px solid #e2e2e5;margin-top:24px;padding-top:20px}.chat-log{max-height:320px;overflow-y:auto;margin-bottom:12px}.chat-message{padding:8px 12px;border-radius:8px;margin-bottom:8px;max-width:85%}.chat-message.user{background:#e8f0fe;margin-left:auto}.chat-message.assistant{background:#f1f1f3}.chat-input-row{display:flex;gap:8px}.chat-input-row textarea{min-height:44px}.meta-row{display:flex;justify-content:space-between;font-size:12px;color:#777;margin-top:6px}.error-banner{background:#fdecea;border:1px solid #f5c2c0;color:#8a2119;padding:12px;border-radius:6px;margin-bottom:16px}.completion-code{font-family:monospace;font-size:22px;background:#f1f1f3;padding:12px 16px;border-radius:6px;display:inline-block;margin-top:12px}