*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;background:#f5f5f5;color:#333}#app{min-height:100vh}button{cursor:pointer;padding:8px 16px;border:none;border-radius:4px;font-size:14px;background:#4285f4;color:#fff}button:hover{background:#3367d6}button.secondary{background:#e0e0e0;color:#333}button.secondary:hover{background:#d0d0d0}button:disabled{opacity:.6;cursor:not-allowed}input,textarea{padding:8px;border:1px solid #ddd;border-radius:4px;font-size:14px}textarea{font-family:monospace;resize:vertical}