: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;
            --error-color: #dc3545;
            --prototype-color: #ff6b35;
        }
         
        .page-header {
            background: linear-gradient(135deg, rgba(169, 214, 229, 0.4) 0%, rgba(44, 125, 160, 0.4) 100%);
            padding: 1.5rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid rgba(44, 125, 160, 0.2);     color: var(--text-color);
        }
        
        .breadcrumb {
            background-color: transparent;
            padding: 0.5rem 0;
            margin-bottom: 0.5rem;
        }
        
        .breadcrumb-item a {
            color: var(--text-muted);
            text-decoration: none;
        }
        
        .breadcrumb-item.active {
            color: var(--text-color);
        }
         
        .tree-container {
            position: relative;
            height: 500px;
            width: 100%;
            overflow: auto;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            background-color: white;
            margin: 1.5rem 0;
        }
        
        .tree-svg {
            width: 100%;
            height: 100%;
        }
        
        .tree-node circle {
            fill: var(--primary-color);
            stroke: white;
            stroke-width: 2px;
        }
        
        .tree-node text {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            font-size: 12px;
            fill: var(--text-color);
        }
        
        .tree-link {
            fill: none;
            stroke: #ccc;
            stroke-width: 2px;
        }
        
        .tree-controls {
            display: flex;
            justify-content: space-between;
            margin-bottom: 1rem;
            flex-wrap: wrap;
        }
        
        .tree-control-group {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        
        .sequence-input {
            font-family: monospace;
            font-size: 0.9rem;
            height: 200px;
        }
        
        .phylogenetics-summary {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        
        .phylogenetics-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);
        }
        
        .phylogenetics-item h4 {
            font-size: 1rem;
            color: var(--text-muted);
            margin-bottom: 0.5rem;
        }
        
        .phylogenetics-item .value {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-color);
        }
        
        .phylogenetics-item .detail {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 0.5rem;
        }
        
        .example-sequences {
            background-color: rgba(44, 125, 160, 0.05);
            border-radius: 6px;
            padding: 1rem;
            margin-top: 1rem;
        }
        
        .example-sequence {
            font-family: monospace;
            font-size: 0.85rem;
            margin-bottom: 0.5rem;
        }
        
        .tree-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-form {
            display: none;
        }
        
        .mode-form.active {
            display: block;
        }
        
        .test-results {
            background-color: #f8f9fa;
            border-radius: 8px;
            padding: 1.5rem;
            margin-top: 2rem;
            border: 1px solid #dee2e6;
        }
        
        .test-result-item {
            padding: 10px;
            margin-bottom: 10px;
            border-radius: 4px;
            background-color: white;
        }
        
        .test-pass {
            border-left: 4px solid #28a745;
        }
        
        .test-fail {
            border-left: 4px solid #dc3545;
        }
        
        .test-warning {
            border-left: 4px solid #ffc107;
        }
        
        .test-icon {
            margin-right: 10px;
        } 
        .prototype-warning {
            background-color: rgba(255, 107, 53, 0.1);
            border: 1px solid var(--prototype-color);
            border-radius: 8px;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: flex-start;
        }
        
        .prototype-icon {
            color: var(--prototype-color);
            font-size: 1.5rem;
            margin-right: 1rem;
            flex-shrink: 0;
        }
        
        .prototype-content h4 {
            color: var(--prototype-color);
            margin-bottom: 0.5rem;
        }
        
        .prototype-content ul {
            padding-left: 1.5rem;
            margin-bottom: 0;
        }
        
        .prototype-content li {
            margin-bottom: 0.25rem;
        }
        
        .status-indicator {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            text-transform: uppercase;
            margin-left: 1rem;
        }
        
        .status-prototype {
            background-color: rgba(255, 107, 53, 0.1);
            color: var(--prototype-color);
            border: 1px solid var(--prototype-color);
        }
        
        .demo-placeholder {
            background-color: #f8f9fa;
            border: 2px dashed #dee2e6;
            border-radius: 8px;
            padding: 3rem;
            text-align: center;
            margin: 2rem 0;
        }
        
        .demo-placeholder i {
            font-size: 3rem;
            color: #6c757d;
            margin-bottom: 1rem;
        }
        
        .demo-placeholder h4 {
            color: #495057;
            margin-bottom: 0.5rem;
        }
        
        .demo-placeholder p {
            color: #6c757d;
            max-width: 500px;
            margin: 0 auto;
        }
        
        @media (max-width: 768px) {
            .tree-controls {
                flex-direction: column;
                gap: 10px;
            }
            
            .tree-control-group {
                justify-content: center;
            }
            
            .phylogenetics-summary {
                grid-template-columns: 1fr;
            }
            
            .action-buttons {
                justify-content: center;
                margin-top: 1rem;
            }
            
            .prototype-warning {
                flex-direction: column;
            }
            
            .prototype-icon {
                margin-right: 0;
                margin-bottom: 1rem;
            }
        }