\begin{table}[h]
\centering
\small
  \renewcommand{\arraystretch}{1.1}
  \begin{tabular}{@{}ll@{}}
  \toprule
  \textbf{Hyperparameter} & \textbf{Value} \\
  \midrule
  Batch size                & 4 \\
  Max sequence length       & 192 tokens \\
  Learning rate             & $1.5 \times 10^{-5}$ \\
  Dropout                   & 0.1 (encoder), 0.3 (FC layer) \\
  Optimizer                 & AdamW \\
  Mixed precision           & bfloat16 \\
  Early stopping            & Patience 3 epochs (fine-tuning only) \\
  \bottomrule
  \end{tabular}
  \caption{\robertaBase{} training configuration}
\label{tab:training_hparams}
\end{table}