.financial-item .value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}.financial-item h4 {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}.financial-item .detail {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}
.display-5{font-size:2.5rem}
        .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-form {
            display: none;
        }
        
        .mode-form.active {
            display: block;
        }
         
        .error-message {
            color: #dc3545;
            font-size: 0.875rem;
            margin-top: 0.25rem;
            display: none;
        }
        
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            font-weight: 600;
            padding: 0.75rem 1.5rem;
            border-radius: 6px;
            transition: all 0.3s;
        }
         
        .financial-summary {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        
        .financial-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);
        }
        
        .chart-container {
            position: relative;
            height: 400px;
            width: 100%;
            margin: 2rem 0;
        }
        
        .water-quality-indicator {
            display: inline-block;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            margin-right: 8px;
        }
        
        .quality-excellent { background-color: #28a745; }
        .quality-good { background-color: #20c997; }
        .quality-fair { background-color: #ffc107; }
        .quality-poor { background-color: #fd7e14; }
        .quality-very-poor { background-color: #dc3545; }
        
         
        .validation-summary {
            background-color: rgba(220, 53, 69, 0.1);
            border-left: 4px solid #dc3545;
            padding: 1rem;
            margin-bottom: 1rem;
            border-radius: 0 4px 4px 0;
            display: none;
        }
       
        .history-container {
            margin-top: 2rem;
        }
        
        .history-item {
            background: white;
            border-radius: 6px;
            padding: 1rem;
            margin-bottom: 0.75rem;
            border: 1px solid var(--border-color);
            box-shadow: 0 1px 3px rgba(0,0,0,0.05);
        }
         
        @media (max-width: 768px) { 
            .financial-summary { grid-template-columns: 1fr; }
            .calculation-modes { flex-direction: column; }
            .mode-btn { margin-bottom: 4px; }
        }