:root {
            --primary-color: #2c7da0;
            --secondary-color: #a9d6e5;
            --accent-color: #01497c;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
            --player-1-color: #e74c3c;
            --player-2-color: #3498db;
            --grid-color: #555;
            --box-highlight: #fffacd;
            --player-1-light: rgba(231, 76, 60, 0.1);
            --player-2-light: rgba(52, 152, 219, 0.1);
            --success-color: #28a745;
            --warning-color: #ffc107;
            --danger-color: #dc3545;
        }
          
     
        .game-area {
            display: flex;
            flex-direction: column;
            align-items: center;
            margin: 2rem 0;
        }
        
        .dots-container {
            width: 100%;
            max-width: 700px;
            background-color: white;
            border-radius: 10px;
            position: relative;
            overflow: hidden;
            margin-bottom: 2rem;
            border: 1px solid var(--border-color);
            padding: 20px;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        
        #dotsCanvas {
            max-width: 100%;
            height: auto;
            display: block;
            cursor: pointer;
        }
        
        .game-controls {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
            margin: 1.5rem 0;
        }
        
        .game-btn {
            padding: 0.75rem 1.5rem;
            border-radius: 6px;
            font-weight: 600;
            transition: all 0.3s;
            border: none;
        }
        
        .game-btn-primary {
            background-color: var(--primary-color);
            color: white;
        }
        
        .game-btn-primary:hover {
            background-color: var(--accent-color);
            transform: translateY(-2px);
        }
        
        .game-btn-secondary {
            background-color: #6c757d;
            color: white;
        }
        
        .game-btn-secondary:hover {
            background-color: #5a6268;
            transform: translateY(-2px);
        }
        
        .game-btn-success {
            background-color: var(--success-color);
            color: white;
        }
        
        .game-btn-success:hover {
            background-color: #218838;
            transform: translateY(-2px);
        }
        
        .game-stats {
            display: flex;
            justify-content: space-around;
            background-color: var(--light-gray);
            border-radius: 8px;
            padding: 1.5rem;
            margin: 1.5rem 0;
            border: 1px solid var(--border-color);
        }
        
        .stat-item {
            text-align: center;
        }
        
        .stat-value {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 0.25rem;
        }
        
        .player-stat-value {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.25rem;
        }
        
        .player-1-stat {
            color: var(--player-1-color);
        }
        
        .player-2-stat {
            color: var(--player-2-color);
        }
        
        .stat-label {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        
        .game-info-box {
            background-color: rgba(44, 125, 160, 0.05);
            border-left: 3px solid var(--primary-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        
        .game-tip-box {
            background-color: rgba(255, 193, 7, 0.05);
            border-left: 3px solid var(--warning-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        
        .current-player {
            display: flex;
            align-items: center;
            justify-content: center;
            background-color: var(--light-gray);
            border-radius: 8px;
            padding: 1rem;
            margin: 1.5rem 0;
            border: 1px solid var(--border-color);
        }
        
        .current-player-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 1rem;
            font-weight: bold;
            color: white;
            font-size: 1.2rem;
        }
        
        .player-1-icon {
            background-color: var(--player-1-color);
        }
        
        .player-2-icon {
            background-color: var(--player-2-color);
        }
        
        .player-label {
            font-weight: 600;
            font-size: 1.2rem;
        }
        
        .level-selection {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            margin: 1.5rem 0;
        }
        
        .level-btn {
            padding: 0.75rem 1.5rem;
            border-radius: 6px;
            font-weight: 600;
            background-color: white;
            border: 2px solid var(--border-color);
            transition: all 0.3s;
        }
        
        .level-btn:hover {
            background-color: var(--light-gray);
        }
        
        .level-btn.active {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }
        
        .victory-message {
            background: linear-gradient(135deg, rgba(40, 167, 69, 0.1) 0%, rgba(40, 167, 69, 0.3) 100%);
            border: 2px solid var(--success-color);
            border-radius: 8px;
            padding: 2rem;
            text-align: center;
            margin: 2rem 0;
            display: none;
        }
        
        .victory-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--success-color);
            margin-bottom: 1rem;
        }
        
        .related-tools {
            background-color: white;
            border-radius: 8px;
            border: 1px solid var(--border-color); 
            margin-bottom: 1.5rem;
        }
        
        .related-title {
            font-weight: 600;
            margin-bottom: 1.25rem;
            padding-bottom: 0.75rem; 
            color: var(--primary-color);
        }
        
        .section-title {
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--primary-color);
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--border-color);
        }
        
        .strategy-tips {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
        }
        
        .tip-card {
            background: white;
            border-radius: 8px;
            padding: 1.25rem;
            border: 1px solid var(--border-color);
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        }
        
        .game-mode-toggle {
            display: flex;
            background-color: var(--light-gray);
            border-radius: 6px;
            padding: 4px;
            margin-bottom: 1.5rem;
        }
        
        .mode-btn {
            flex: 1;
            text-align: center;
            padding: 0.75rem;
            border-radius: 4px;
            cursor: pointer;
            transition: all 0.3s;
            font-weight: 600;
        }
        
        .mode-btn.active {
            background-color: var(--primary-color);
            color: white;
        }
        
        .move-history {
            background-color: var(--light-gray);
            border-radius: 8px;
            padding: 1.5rem;
            margin: 1.5rem 0;
            max-height: 300px;
            overflow-y: auto;
            border: 1px solid var(--border-color);
        }
        
        .difficulty-indicator {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-right: 0.5rem;
        }
        
        .difficulty-easy {
            background-color: rgba(40, 167, 69, 0.1);
            color: #28a745;
        }
        
        .difficulty-medium {
            background-color: rgba(255, 193, 7, 0.1);
            color: #ffc107;
        }
        
        .difficulty-hard {
            background-color: rgba(220, 53, 69, 0.1);
            color: #dc3545;
        }
        
        .footer {
            background-color: var(--light-gray); 
            margin-top: 3rem;
            border-top: 1px solid var(--border-color);
        }
        
        .player-indicator {
            display: inline-block;
            width: 20px;
            height: 20px;
            border-radius: 4px;
            margin-right: 8px;
        }
        
        .player-1-indicator {
            background-color: var(--player-1-color);
        }
        
        .player-2-indicator {
            background-color: var(--player-2-color);
        }
        
        .player-box {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 4px;
            font-weight: 600;
        }
        
        .player-1-box {
            background-color: var(--player-1-light);
            color: var(--player-1-color);
        }
        
        .player-2-box {
            background-color: var(--player-2-light);
            color: var(--player-2-color);
        }
        
        .score-board {
            display: flex;
            justify-content: space-around;
            margin: 1.5rem 0;
        }
        
        .player-score {
            text-align: center;
            padding: 1rem;
            border-radius: 8px;
            width: 45%;
        }
        
        .player-1-score {
            background-color: var(--player-1-light);
            border: 2px solid var(--player-1-color);
        }
        
        .player-2-score {
            background-color: var(--player-2-light);
            border: 2px solid var(--player-2-color);
        }
        
        .player-name {
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 0.5rem;
        }
        
        .box-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 5px;
            margin: 1rem 0;
        }
        
        .box-cell {
            width: 100%;
            padding-top: 100%; /* 1:1 Aspect Ratio */
            position: relative;
            border: 1px solid #ddd;
            border-radius: 4px;
        }
        
        .box-owner-1 {
            background-color: var(--player-1-color);
        }
        
        .box-owner-2 {
            background-color: var(--player-2-color);
        }
        
        @media (max-width: 768px) {
            .tool-card {
                padding: 1.5rem;
            }
            
            .dots-container {
                padding: 10px;
            }
            
            .game-controls {
                flex-direction: column;
                align-items: center;
            }
            
            .game-btn {
                width: 100%;
                max-width: 300px;
            }
            
            .game-stats {
                flex-direction: column;
                gap: 1rem;
            }
            
            .score-board {
                flex-direction: column;
                align-items: center;
                gap: 1rem;
            }
            
            .player-score {
                width: 90%;
            }
        }
        
        .toast-container {
            position: fixed;
            bottom: 20px;
            right: 20px;
            z-index: 1050;
        }
        
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.1); }
            100% { transform: scale(1); }
        }
        
        .pulse {
            animation: pulse 0.5s ease;
        }
        
        .form-control {
            border: 1px solid #ddd;
            border-radius: 6px;
            padding: 0.75rem;
            transition: all 0.3s;
        }
        
        .btn {
            border-radius: 6px;
            padding: 0.75rem 1.5rem;
            font-weight: 600;
            transition: all 0.3s;
        }
        
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
        }
        
        .alert {
            border-radius: 6px;
            border: 1px solid transparent;
            padding: 1rem;
            margin-bottom: 1rem;
        }
        
        .alert-success {
            background-color: rgba(40, 167, 69, 0.1);
            border-color: rgba(40, 167, 69, 0.2);
            color: #155724;
        }
        
        .faq-section {
            margin-top: 2rem;
        }
        
        .accordion-button:not(.collapsed) {
            background-color: rgba(44, 125, 160, 0.1);
            color: var(--primary-color);
            font-weight: 600;
        }
         
        .move-list {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        
        .move-item {
            padding: 0.5rem;
            background-color: white;
            border-radius: 4px;
            border-left: 3px solid var(--primary-color);
            font-family: monospace;
        }
        
        .move-item.player-1-move {
            border-left-color: var(--player-1-color);
        }
        
        .move-item.player-2-move {
            border-left-color: var(--player-2-color);
        }
        
        .move-item.current {
            background-color: rgba(44, 125, 160, 0.1);
            font-weight: bold;
        }
        
        .player-selector {
            display: flex;
            gap: 1rem;
            margin: 1.5rem 0;
        }
        
        .player-option {
            flex: 1;
            text-align: center;
            padding: 1rem;
            border-radius: 8px;
            border: 2px solid var(--border-color);
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .player-option.active {
            border-color: var(--primary-color);
            background-color: rgba(44, 125, 160, 0.05);
        }
        
        .player-option.player-1-option.active {
            border-color: var(--player-1-color);
            background-color: var(--player-1-light);
        }
        
        .player-option.player-2-option.active {
            border-color: var(--player-2-color);
            background-color: var(--player-2-light);
        }
        
        .player-option-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 0.5rem;
            font-weight: bold;
            color: white;
            font-size: 1.5rem;
        }