body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            max-width: 800px;
            margin: 0 auto;
            padding: 20px;
            background-color: #f5f5f5;
            color: #333;
        }

        h1 {
            text-align: center;
            color: #2c3e50;
        }

        .game-container {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            gap: 20px;
            margin-bottom: 20px;
        }

        .game-info-panel {
            flex: 1;
            background-color: white;
            padding: 15px;
            border-radius: 5px;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
        }

        #board {
            width: 400px;
            flex-shrink: 0;
        }

        .controls {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-bottom: 20px;
        }

        button {
            padding: 8px 16px;
            background-color: #3498db;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 14px;
        }

        button:hover {
            background-color: #2980b9;
        }

        button:disabled {
            background-color: #95a5a6;
            cursor: not-allowed;
        }

        .status {
            text-align: center;
            font-weight: bold;
            margin: 10px 0;
            min-height: 24px;
        }

        .success {
            color: #27ae60;
        }

        .error {
            color: #e74c3c;
        }

        .game-rules {
            background-color: white;
            padding: 15px;
            border-radius: 5px;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
        }

        @media (max-width: 768px) {
            .game-container {
                flex-direction: column;
            }

            #board {
                width: 100%;
                max-width: 400px;
                margin: 0 auto;
            }
        }