:root {
            --primary-color: #2c7da0;
            --secondary-color: #a9d6e5;
            --accent-color: #01497c;
            --finance-color: #198754;
            --warning-color: #ffc107;
            --danger-color: #dc3545;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
            --success-color: #28a745;
            --math-color: #6f42c1;
            --calc-color: #e83e8c;
        }
       .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);
        }
        .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:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(44, 125, 160, 0.15);
        }
        .highlight-box {
            background-color: rgba(25, 135, 84, 0.1);
            border-left: 4px solid var(--finance-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        .warning-box {
            background-color: rgba(255, 193, 7, 0.1);
            border-left: 4px solid var(--warning-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        @media (max-width: 768px) {
            }
        .loan-examples {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .example-btn {
            background-color: rgba(44, 125, 160, 0.1);
            border: 1px solid rgba(44, 125, 160, 0.2);
            border-radius: 4px;
            padding: 0.5rem 0.75rem;
            font-size: 0.9rem;
            color: var(--primary-color);
            cursor: pointer;
            transition: all 0.2s;
            font-family: 'Segoe UI', sans-serif;
        }
        .example-btn:hover {
            background-color: rgba(44, 125, 160, 0.2);
            transform: translateY(-2px);
        }
        .calculation-step {
            margin-bottom: 1.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px dashed var(--border-color);
        }
        .repayment-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
        }
        .repayment-table th, .repayment-table td {
            padding: 0.75rem;
            text-align: left;
            border: 1px solid var(--border-color);
        }
        .repayment-table th {
            background-color: var(--light-gray);
            font-weight: 600;
        }
        .repayment-table tr:nth-child(even) {
            background-color: rgba(44, 125, 160, 0.05);
        }
        .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;
        }
        .principal-color {
            background-color: rgba(44, 125, 160, 0.8);
        }
        .interest-color {
            background-color: rgba(232, 62, 140, 0.8);
        }
        .plan-comparison {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin: 1.5rem 0;
        }
        .plan-card {
            flex: 1;
            min-width: 200px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 1.5rem;
            background-color: white;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        }
        .plan-card.selected {
            border-color: var(--finance-color);
            box-shadow: 0 0 0 3px rgba(25, 135, 84, 0.1);
        }
        .plan-name {
            font-weight: 600;
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
        }
        .plan-payment {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--finance-color);
            margin-bottom: 0.5rem;
        }
        .toggle-container {
            display: flex;
            align-items: center;
            margin-bottom: 1rem;
        }
        .toggle-label {
            margin-right: 1rem;
            font-weight: 600;
        }
        .switch {
            position: relative;
            display: inline-block;
            width: 60px;
            height: 30px;
        }
        .switch input {
            opacity: 0;
            width: 0;
            height: 0;
        }
        .slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: #ccc;
            transition: .4s;
            border-radius: 34px;
        }
        .slider:before {
            position: absolute;
            content: "";
            height: 22px;
            width: 22px;
            left: 4px;
            bottom: 4px;
            background-color: white;
            transition: .4s;
            border-radius: 50%;
        }
        input:checked + .slider {
            background-color: var(--finance-color);
        }
        input:checked + .slider:before {
            transform: translateX(30px);
        }
        .results-summary {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
            margin: 1.5rem 0;
        }
        .result-item {
            background-color: white;
            border-radius: 8px;
            padding: 1.5rem;
            text-align: center;
            border: 1px solid var(--border-color);
        }
        .result-value {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        .result-label {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .tab-nav {
            display: flex;
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 1.5rem;
        }
        .tab-btn {
            padding: 0.75rem 1.5rem;
            background: none;
            border: none;
            border-bottom: 3px solid transparent;
            font-weight: 600;
            color: var(--text-muted);
            cursor: pointer;
            transition: all 0.3s;
        }
        .tab-btn:hover {
            color: var(--primary-color);
        }
        .tab-btn.active {
            color: var(--primary-color);
            border-bottom-color: var(--primary-color);
        }
        .tab-content {
            display: none;
        }
        .tab-content.active {
            display: block;
        }