:root {
 
            --accent-color: #0d47a1;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
            --success-color: #28a745;
            --warning-color: #ffc107;
            --danger-color: #dc3545;
            --fos-low: #dc3545;
            --fos-medium: #ffc107;
            --fos-high: #28a745;
        }
 
        .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);
        }
        
        .financial-item .value {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-color);
        }
        
        .chart-container {
            position: relative;
            height: 400px;
            width: 100%;
            margin: 2rem 0;
        }
        
 
        
        .fos-visualization {
            background-color: #f8f9fa;
            border-radius: 6px;
            padding: 1rem;
            margin: 1.5rem 0;
            border: 1px solid #dee2e6;
        }
        
        .fos-diagram {
            width: 100%;
            height: 300px;
            border: 1px solid #ddd;
            border-radius: 4px;
            background-color: white;
        }
        
        .parameter-table {
            width: 100%;
            border-collapse: collapse;
        }
        
        .parameter-table th, .parameter-table td {
            padding: 0.75rem;
            text-align: left;
            border-bottom: 1px solid #dee2e6;
        }
        
        .parameter-table th {
            background-color: #f8f9fa;
            font-weight: 600;
        }
        
        .unit-converter {
            background-color: rgba(40, 167, 69, 0.05);
            border-radius: 6px;
            padding: 1rem;
            margin: 1rem 0;display:none
        }
        
        .fos-level-indicator {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.9rem;
        }
        
        .fos-low {
            background-color: rgba(220, 53, 69, 0.2);
            color: var(--fos-low);
        }
        
        .fos-medium {
            background-color: rgba(255, 193, 7, 0.2);
            color: var(--fos-medium);
        }
        
        .fos-high {
            background-color: rgba(40, 167, 69, 0.2);
            color: var(--fos-high);
        }
        
        .material-type-indicator {
            display: inline-block;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            margin-right: 0.5rem;
        }
        
        .material-concrete { background-color: #8B4513; }
        .material-steel { background-color: #4682B4; }
        .material-timber { background-color: #8B4513; }
        .material-masonry { background-color: #A0522D; }
        .material-composite { background-color: #6A5ACD; }
        
        .fos-breakdown-chart {
            height: 350px;
            width: 100%;
        }
        
        .factor-breakdown {
            margin: 1.5rem 0;
        }
        
        .factor-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0.75rem;
            border-bottom: 1px solid #eee;
        }
        
        .factor-name {
            font-weight: 600;
        }
        
        .factor-value {
            font-weight: 700;
            color: var(--primary-color);
        }
        
        @media (max-width: 768px) {
            .tool-card {
                padding: 1.5rem;
            }
            
            .financial-summary {
                grid-template-columns: 1fr;
            }
        }
        
        .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;
            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;
        }
        
        .info-box {
            background-color: rgba(30, 111, 159, 0.05);
            border-radius: 6px;
            padding: 1rem;
            margin: 1rem 0;
            border-left: 4px solid var(--primary-color);
        }
        
        .reliability-index {
            font-size: 1.2rem;
            font-weight: 700;
            text-align: center;
            margin: 1rem 0;
        }
        
        .reliability-high { color: var(--success-color); }
        .reliability-medium { color: var(--warning-color); }
        .reliability-low { color: var(--danger-color); }
        
        .safety-margin {
            display: inline-block;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            font-weight: 600;
            margin: 0.25rem;
        }
        
        .margin-low { background-color: rgba(220, 53, 69, 0.1); color: var(--danger-color); }
        .margin-adequate { background-color: rgba(255, 193, 7, 0.1); color: var(--warning-color); }
        .margin-high { background-color: rgba(40, 167, 69, 0.1); color: var(--success-color); }
       
        .canvas-container {
            position: relative;
            height: 300px;
            width: 100%;
            margin: 1rem 0;
        }