#chessboard {
    width: 500px;
    margin: 0 auto;
}

.chess-controls button {
    margin: 0 5px;
}

#move-display {
    font-size: 1.1rem;
}

@media (max-width: 768px) {
    #chessboard {
        width: 100%;
        max-width: 400px;
    }
}