: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;
            --fitness-green: #198754;
            --fitness-orange: #fd7e14;
            --fitness-yellow: #ffc107;
            --fitness-red: #dc3545;
        }
        
        /* Fitness-specific styling */
        .fitness-alert {
            background-color: rgba(25, 135, 84, 0.1);
            border-left: 4px solid var(--fitness-green);
            padding: 1rem;
            margin: 1rem 0;
            border-radius: 0 4px 4px 0;
        }
        
        .bodyfat-classification {
            padding: 1rem;
            border-radius: 8px;
            margin: 1rem 0;
            border-left: 5px solid;
        }
        
        .bodyfat-essential {
            background-color: rgba(13, 110, 253, 0.1);
            border-left-color: #0d6efd;
        }
        
        .bodyfat-athlete {
            background-color: rgba(25, 135, 84, 0.1);
            border-left-color: var(--fitness-green);
        }
        
        .bodyfat-fitness {
            background-color: rgba(40, 167, 69, 0.1);
            border-left-color: #28a745;
        }
        
        .bodyfat-average {
            background-color: rgba(255, 193, 7, 0.1);
            border-left-color: var(--fitness-yellow);
        }
        
        .bodyfat-obese {
            background-color: rgba(220, 53, 69, 0.1);
            border-left-color: var(--fitness-red);
        }
        
        .bodyfat-status-indicator {
            display: inline-block;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            margin-right: 8px;
        }
        
        .status-essential {
            background-color: #0d6efd;
        }
        
        .status-athlete {
            background-color: var(--fitness-green);
        }
        
        .status-fitness {
            background-color: #28a745;
        }
        
        .status-average {
            background-color: var(--fitness-yellow);
        }
        
        .status-obese {
            background-color: var(--fitness-red);
        }
        
        .method-selector {
            display: flex;
            background-color: var(--light-gray);
            border-radius: 6px;
            padding: 4px;
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
        }
        
        .method-btn {
            flex: 1;
            text-align: center;
            padding: 0.75rem;
            border-radius: 4px;
            cursor: pointer;
            transition: all 0.3s;
            font-weight: 600;
            min-width: 140px;
            margin: 2px;
        }
        
        .method-btn.active {
            background-color: var(--primary-color);
            color: white;
        }
        
        .method-form {
            display: none;
        }
        
        .method-form.active {
            display: block;
        }
        
        .measurement-help {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 0.25rem;
        }
        
        .gender-selector {
            display: flex;
            gap: 10px;
            margin-bottom: 1.5rem;
        }
        
        .gender-option {
            flex: 1;
            text-align: center;
            padding: 1rem;
            border: 2px solid var(--border-color);
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .gender-option.active {
            border-color: var(--primary-color);
            background-color: rgba(44, 125, 160, 0.1);
        }
        
        .gender-option i {
            font-size: 2rem;
            margin-bottom: 0.5rem;
            display: block;
        }
        
        .unit-toggle {
            display: flex;
            justify-content: flex-end;
            margin-bottom: 1rem;
        }
        
        .unit-btn {
            padding: 0.5rem 1rem;
            border: 1px solid var(--border-color);
            background: white;
            cursor: pointer;
            font-weight: 500;
        }
        
        .unit-btn:first-child {
            border-radius: 6px 0 0 6px;
        }
        
        .unit-btn:last-child {
            border-radius: 0 6px 6px 0;
        }
        
        .unit-btn.active {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }
        
        .body-shape-visual {
            text-align: center;
            margin: 1.5rem 0;
            padding: 1rem;
            background-color: var(--light-gray);
            border-radius: 8px;
        }
        
        .shape-icon {
            font-size: 4rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        
        /* Body fat chart styling */
        .bodyfat-chart-container {
            position: relative;
            height: 300px;
            width: 100%;
            margin: 1.5rem 0;
        }
       
       
        /* 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);
        }
        
        .reference-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
        }
        
        .reference-table th, .reference-table td {
            padding: 0.75rem;
            text-align: left;
            border: 1px solid var(--border-color);
        }
        
        .reference-table th {
            background-color: var(--light-gray);
            font-weight: 600;
        }
        
        .reference-table tr:nth-child(even) {
            background-color: rgba(44, 125, 160, 0.05);
        }
         
        /* Responsive adjustments */
        @media (max-width: 768px) {  
            
            .method-btn {
                min-width: 120px;
            }
        }