:root {
            --finance-primary: #2A6EBB; 
            --finance-secondary: #6D849C;  
            --finance-success: #3A9D6E;  
            --finance-warning: #E8B059;  
            --finance-danger: #D26464; 
            --finance-info: #5DA9C6; 
            --finance-light: #F5F7FA; 
            --finance-dark: #3A4A5F;
            --finance-chart-1: #2A6EBB;
            --finance-chart-2: #3A9D6E;
            --finance-chart-3: #E8B059; 
            --finance-chart-4: #5DA9C6;
            --border-color: #DDE2E9; 
            --text-color: #3A4A5F;
            --text-muted: #6D849C;
            --shadow-color: rgba(42, 110, 187, 0.08); 
        }
       
        
        .page-header {
            background: linear-gradient(135deg, rgba(42, 110, 187, 0.05) 0%, rgba(58, 157, 110, 0.05) 100%);
            padding: 1.5rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid rgba(42, 110, 187, 0.1);
            position: relative;
            overflow: hidden;  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);
        }
         
        
        .form-control.is-invalid {
            border-color: var(--finance-danger);
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23D26464'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23D26464' stroke='none'/%3e%3c/svg%3e");
            background-repeat: no-repeat;
            background-position: right calc(.375em + .1875rem) center;
            background-size: calc(.75em + .375rem) calc(.75em + .375rem);
        }
         
        /* Calculation Mode Selector */
        .mode-selector {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            margin-bottom: 1.5rem;
        }
        
        .mode-btn {
            flex: 1;
            min-width: 150px;
            padding: 1.25rem 1rem;
            background-color: white;
            border: 2px solid var(--border-color);
            border-radius: 10px;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .mode-btn:hover {
            border-color: var(--finance-primary);
            background-color: rgba(42, 110, 187, 0.05);
            transform: translateY(-3px);
            box-shadow: 0 4px 8px rgba(42, 110, 187, 0.1);
        }
        
        .mode-btn.active {
            border-color: var(--finance-primary);
            background-color: rgba(42, 110, 187, 0.1);
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(42, 110, 187, 0.15);color:#000
        }
        
        .mode-icon {
            font-size: 1.75rem;
            color: var(--finance-primary);
            margin-bottom: 0.75rem;
        }
        
        /* Result Area */
        .result-container {
            background-color: var(--finance-light);
            border-radius: 10px;
            padding: 1.75rem;
            margin-top: 1.5rem;
            position: relative;
            border: 1px solid var(--border-color);
        }
        
        .result-title {
            font-weight: 600;
            margin-bottom: 0.75rem;
            color: var(--finance-primary);
            font-size: 1.25rem;
        }
        
        .summary-card {
            background: white;
            border-radius: 10px;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            margin-bottom: 1rem;
            box-shadow: 0 2px 6px rgba(0,0,0,0.05);
        }
        
        .summary-value {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--finance-primary);
            margin-bottom: 0.5rem;
        }
        
        .summary-label {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        
        .result-highlight {
            background: linear-gradient(135deg, rgba(42, 110, 187, 0.08) 0%, rgba(58, 157, 110, 0.08) 100%);
            border-left: 4px solid var(--finance-success);
            padding: 1.5rem;
            border-radius: 8px;
            margin: 1.5rem 0;
        }
        
        .result-item {
            display: flex;
            justify-content: space-between;
            padding: 0.75rem 0;
            border-bottom: 1px solid rgba(0,0,0,0.08);
        }
        
        .result-item:last-child {
            border-bottom: none;
        }
        
        .result-label {
            color: var(--text-muted);
        }
        
        .result-value {
            font-weight: 600;
            color: var(--text-color);
        }
        
        /* Chart Container */
        .chart-container {
            position: relative;
            height: 400px;
            width: 100%;
            margin: 2rem 0;
        }
        
        /* Content Sections */
        .section-title {
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--finance-primary);
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--border-color);
        }
        
        .usage-step {
            display: flex;
            margin-bottom: 1.5rem;
            align-items: flex-start;
        }
        
        .step-number {
            width: 28px;
            height: 28px;
            background-color: var(--finance-primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 1rem;
            flex-shrink: 0;
            font-weight: 600;
            font-size: 0.9rem;
        }
        
        .info-box {
            background-color: rgba(42, 110, 187, 0.05);
            border-left: 3px solid var(--finance-primary);
            padding: 1.25rem;
            border-radius: 0 8px 8px 0;
            margin: 1.5rem 0;
        }
        
        .finance-box {
            background: linear-gradient(135deg, rgba(58, 157, 110, 0.05) 0%, rgba(93, 169, 198, 0.05) 100%);
            border-left: 3px solid var(--finance-success);
            padding: 1.25rem;
            border-radius: 0 8px 8px 0;
            margin: 1.5rem 0;
        }
         
        /* Responsive Adjustments */
        @media (max-width: 768px) {
 
            .mode-btn {
                min-width: 120px;
                padding: 1rem 0.5rem;
            }
        }
        
        /* Toast notifications */
        .toast-container {
            position: fixed;
            bottom: 20px;
            right: 20px;
            z-index: 1050;
        }
         
        /* Calculation steps */
        .calculation-step {
            margin-bottom: 1.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px dashed var(--border-color);
        }
        
        .step-title {
            font-weight: 600;
            color: var(--finance-success);
            margin-bottom: 0.5rem;
        }
  
        /* Graph legend */
        .graph-legend {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin-top: 1rem;
        }
        
        .legend-item {
            display: flex;
            align-items: center;
        }
        
        .legend-color {
            width: 20px;
            height: 4px;
            margin-right: 0.5rem;
            border-radius: 2px;
        }
        
        .initial-color {
            background-color: rgba(42, 110, 187, 0.8);
        }
        
        .contributions-color {
            background-color: rgba(58, 157, 110, 0.8);
        }
        
        .interest-color {
            background-color: rgba(232, 176, 89, 0.8);
        }
        
        .goal-color {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            margin-right: 0.5rem;
            background-color: rgba(210, 100, 100, 0.8);
        }
        
        /* Range slider */
        .range-slider {
            width: 100%;
            -webkit-appearance: none;
            height: 6px;
            border-radius: 3px;
            background: var(--border-color);
            outline: none;
        }
        
        .range-slider::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--finance-primary);
            cursor: pointer;
            border: 2px solid white;
            box-shadow: 0 2px 4px rgba(0,0,0,0.2);
        }
        
        .range-slider::-moz-range-thumb {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--finance-primary);
            cursor: pointer;
            border: 2px solid white;
            box-shadow: 0 2px 4px rgba(0,0,0,0.2);
        }
        
        .slider-value {
            display: inline-block;
            min-width: 40px;
            text-align: right;
        }
        
        /* Scenario tabs */
        .scenario-tabs {
            display: flex;
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 1.5rem;
        }
        
        .scenario-tab {
            padding: 0.75rem 1.5rem;
            background: none;
            border: none;
            border-bottom: 3px solid transparent;
            font-weight: 500;
            color: var(--text-muted);
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .scenario-tab.active {
            color: var(--finance-primary);
            border-bottom-color: var(--finance-primary);
        }
        
        /* Timeline visualization */
        .timeline-container {
            margin: 2rem 0;
            padding: 1.5rem;
            background-color: white;
            border-radius: 10px;
            position: relative;
            border: 1px solid var(--border-color);
            box-shadow: 0 2px 8px rgba(0,0,0,0.05);
        }
        
        .timeline {
            position: relative;
            height: 60px;
            margin: 2rem 0;
        }
        
        .timeline-line {
            position: absolute;
            top: 50%;
            left: 0;
            right: 0;
            height: 2px;
            background-color: var(--finance-primary);
            transform: translateY(-50%);
        }
        
        .timeline-marker {
            position: absolute;
            top: 50%;
            transform: translate(-50%, -50%);
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background-color: white;
            border: 3px solid var(--finance-primary);
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }
        
        .timeline-marker.start {
            left: 0;
        }
        
        .timeline-marker.end {
            left: 100%;
        }
        
        .timeline-marker.current {
            background-color: var(--finance-primary);
        }
        
        .timeline-label {
            position: absolute;
            top: 100%;
            transform: translateX(-50%);
            white-space: nowrap;
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 0.5rem;
        }
        
        .timeline-label.start {
            left: 0;
            text-align: left;
        }
        
        .timeline-label.end {
            left: 100%;
            text-align: right;
        }
        
        /* Ad container */
        .ad-container {
            margin-bottom: 1.5rem;
        }
        
        .ad-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 0.5rem;
        }
        
        .ad-placeholder {
            background-color: var(--finance-light);
            border: 1px dashed var(--border-color);
            border-radius: 8px;
            padding: 3rem 1rem;
            text-align: center;
            color: var(--text-muted);
        }
        
        /* Advanced options */
        .advanced-options {
            background-color: rgba(42, 110, 187, 0.03);
            border-radius: 10px;
            padding: 1.5rem;
            margin: 1.5rem 0;
            border: 1px solid var(--border-color);
        }
        
        .advanced-toggle {
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            padding: 0.75rem 0;
        }
        
        .advanced-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
        }
        
        .advanced-content.show {
            max-height: 500px;
        }
        
        /* Scenario comparison */
        .scenario-comparison {
            margin-top: 2rem;
        }
        
        .scenario-card {
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 10px;
            padding: 1.5rem;
            margin-bottom: 1rem;
            position: relative;
            transition: all 0.3s;
        }
        
        .scenario-card:hover {
            box-shadow: 0 4px 12px rgba(0,0,0,0.08);
        }
        
        .scenario-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1rem;
        }
        
        .scenario-actions {
            display: flex;
            gap: 0.5rem;
        }
        
        .scenario-actions button {
            padding: 0.25rem 0.5rem;
            font-size: 0.875rem;
        }
        
        /* Export options */
        .export-options {
            display: flex;
            gap: 0.75rem;
            margin-top: 1rem;
            flex-wrap: wrap;
        }
        
        .export-btn {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.25rem;
            border-radius: 8px;
            background-color: white;
            border: 1px solid var(--border-color);
            transition: all 0.3s;
            color: var(--text-color);
            font-weight: 500;
        }
        
        .export-btn:hover {
            background-color: var(--finance-light);
            border-color: var(--finance-primary);
            color: var(--finance-primary);
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.08);
        }
        
        /* Invalid feedback */
        .invalid-feedback {
            display: none;
            width: 100%;
            margin-top: 0.25rem;
            font-size: 0.875em;
            color: var(--finance-danger);
        }
        
        .invalid-feedback.show {
            display: block;
        }
        
        /* Form check */
        .form-check-input:checked {
            background-color: var(--finance-primary);
            border-color: var(--finance-primary);
        }
        
        /* Badge styles */
        .badge {
            font-weight: 500;
            padding: 0.35em 0.65em;
        }
        
        /* Alert styles */
        .alert {
            border-radius: 8px;
            border: none;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
        }
        
        /* Loading spinner */
        .fa-spinner {
            color: var(--finance-primary);
        }
        
        /* Progress bar for timeline */
        .timeline-progress {
            position: absolute;
            top: 50%;
            left: 0;
            height: 4px;
            background-color: var(--finance-success);
            transform: translateY(-50%);
            border-radius: 2px;
            z-index: 1;
        }