: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;
            --danger-color: #dc3545;
        }
     
        .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);
            position: relative;
            overflow: hidden;   color: var(--text-color);
        }
        .result-container{display:none}
        
        .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);
        }
         
 
        .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;
        }
        
        
        .form-group {
            margin-bottom: 1.5rem;
        }
        
        .equation-box {
            background-color: white;
            border-radius: 8px;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            margin-bottom: 1.5rem;
            font-family: 'Courier New', monospace;
            font-size: 1.1rem;
            text-align: center;
        }
        
        .input-group {
            margin-bottom: 1rem;
        }
        
        .unit-label {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        
        .result-value {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
            margin: 1rem 0;
        }
        
        .result-unit {
            color: var(--text-muted);
            font-size: 1rem;
            margin-left: 0.5rem;
        }
        
       
        .input-disabled {
            background-color: #f8f9fa;
            opacity: 0.7;
        }
        
        .peak-data {
            background-color: var(--light-gray);
            border-radius: 8px;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
        }
        
        .peak-title {
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--primary-color);
        }
        
        .quality-indicator {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-left: 0.5rem;
        }
        
        .quality-good {
            background-color: rgba(40, 167, 69, 0.1);
            color: var(--success-color);
        }
        
        .quality-fair {
            background-color: rgba(255, 193, 7, 0.1);
            color: var(--warning-color);
        }
        
        .quality-poor {
            background-color: rgba(220, 53, 69, 0.1);
            color: var(--danger-color);
        }
        
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
        }
        
        .metric-card {
            background: white;
            border-radius: 8px;
            padding: 1.25rem;
            border: 1px solid var(--border-color);
            text-align: center;
        }
        
        .metric-value {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        
        .metric-label {
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        
        .method-params {
            background-color: var(--light-gray);
            border-radius: 8px;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
        }
         
        .mode-content {
            display: none;
        }
        
        .mode-content.active {
            display: block;
        }