:root {
            --primary-color: #2c7da0;
            --secondary-color: #a9d6e5;
            --accent-color: #01497c;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
            --success-color: #28a745;
            --warning-color: #ffc107;
        }
            
        /* Chart Container */
        .chart-container {
            position: relative;
            height: 400px;
            width: 100%;
            margin: 2rem 0;
        }
        
        /* Symmetry Summary */
        .symmetry-summary {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        
        .symmetry-item {
            background: white;
            border-radius: 8px;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        }
        
        .symmetry-item h4 {
            font-size: 1rem;
            color: var(--text-muted);
            margin-bottom: 0.5rem;
        }
        
        .symmetry-item .value {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-color);
        }
        
        .symmetry-item .detail {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 0.5rem;
        }
         
        
        /* Toggle switch for calculation modes */
        .calculation-modes {
            display: flex;
            background-color: var(--light-gray);
            border-radius: 6px;
            padding: 4px;
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
        }
        
        .mode-btn {
            flex: 1;
            text-align: center;
            padding: 0.75rem;
            border-radius: 4px;
            cursor: pointer;
            transition: all 0.3s;
            font-weight: 600;
            min-width: 120px;
            margin: 2px;
        }
        
        .mode-btn.active {
            background-color: var(--primary-color);
            color: white;
        }
         
        /* Mode-specific form styling */
        .mode-form {
            display: none;
        }
        
        .mode-form.active {
            display: block;
        }
        
        /* Comparison table */
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
        }
        
        .comparison-table th, .comparison-table td {
            padding: 0.75rem;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }
        
        .comparison-table th {
            background-color: var(--light-gray);
            font-weight: 600;
        }
        
        .comparison-table tr:hover {
            background-color: rgba(44, 125, 160, 0.05);
        }
        
        /* Custom styles for Symmetry Analyzer */
        .molecule-input {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
         
        .molecule-options-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 1rem;
            margin-bottom: 1.5rem;
        }
        
        .molecule-option-compact {
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 1rem;
            border: 2px solid var(--border-color);
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            text-align: center;
            height: 100%;
        }
        
        .molecule-option-compact:hover {
            border-color: var(--primary-color);
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }
        
        .molecule-option-compact.selected {
            border-color: var(--primary-color);
            background-color: rgba(44, 125, 160, 0.05);
        }
        
        .molecule-icon-compact {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        
        .molecule-name-compact {
            font-weight: 600;
            margin-bottom: 0.25rem;
        }
        
        .molecule-formula-compact {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0.25rem;
        }
        
        .molecule-pointgroup-compact {
            font-size: 0.8rem;
            color: var(--accent-color);
            background: rgba(1, 73, 124, 0.1);
            padding: 0.2rem 0.5rem;
            border-radius: 12px;
        }
         
        @media (max-width: 768px) {
            .molecule-options-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 576px) {
            .molecule-options-grid {
                grid-template-columns: 1fr;
            }
        }
        
        .symmetry-element {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            background-color: rgba(44, 125, 160, 0.1);
            border-radius: 4px;
            margin: 0.25rem;
            font-size: 0.9rem;
        }
        
        .point-group-card {
            background: white;
            border-radius: 8px;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            text-align: center;
            margin-bottom: 1.5rem;
        }
        
        .point-group-name {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        
        .symmetry-operations {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
        }
        
        .operation-card {
            background: white;
            border-radius: 8px;
            padding: 1rem;
            border: 1px solid var(--border-color);
            text-align: center;
        }
        
        .operation-icon {
            font-size: 1.5rem;
            margin-bottom: 0.5rem;
            color: var(--primary-color);
        }
        
        .character-table {
            overflow-x: auto;
        }
        
        .character-table table {
            width: 100%;
            border-collapse: collapse;
        }
        
        .character-table th, .character-table td {
            padding: 0.5rem;
            text-align: center;
            border: 1px solid var(--border-color);
        }
        
        .character-table th {
            background-color: var(--light-gray);
            font-weight: 600;
        }
        
        .symmetry-flowchart {
            background: white;
            border-radius: 8px;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            margin: 1.5rem 0;
        }
        
        .flowchart-step {
            display: flex;
            align-items: center;
            margin-bottom: 1rem;
            padding: 1rem;
            border-radius: 8px;
            background-color: rgba(44, 125, 160, 0.05);
        }
        
        .flowchart-question {
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        
        .flowchart-answer {
            margin-left: 1rem;
            font-weight: 600;
            color: var(--primary-color);
        }
 
        .symmetry-elements-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 1rem;
            margin: 1rem 0;
        }
        
        .symmetry-element-option {
            display: flex;
            align-items: center;
            padding: 0.75rem;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .symmetry-element-option:hover {
            background-color: var(--light-gray);
        }
        
        .symmetry-element-option.selected {
            background-color: rgba(44, 125, 160, 0.1);
            border-color: var(--primary-color);
        }
        
        .symmetry-element-icon {
            width: 30px;
            text-align: center;
            margin-right: 0.75rem;
            font-size: 1.2rem;
            color: var(--primary-color);
        }