body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            max-width: 1000px;
            margin: 0 auto;
            padding: 20px;
            background-color: #f8f9fa;
        }
        .container {
            background-color: #ffffff;
            border-radius: 12px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            padding: 30px;
            margin-bottom: 20px;
        }
        h1 {
            color: #2c3e50;
            text-align: center;
            margin-bottom: 10px;
        }
        .subtitle {
            text-align: center;
            color: #666;
            margin-bottom: 30px;
        }
        h2 {
            color: #2c3e50;
            border-bottom: 2px solid #8e44ad;
            padding-bottom: 10px;
            margin-top: 30px;
        }
        .calculator-tabs {
            display: flex;
            background-color: #f8f9fa;
            border-radius: 8px 8px 0 0;
            overflow: hidden;
            margin-bottom: 0;
        }
        .tab {
            flex: 1;
            padding: 15px;
            background-color: #e9ecef;
            border: none;
            cursor: pointer;
            font-size: 14px;
            transition: background-color 0.3s;
        }
        .tab.active {
            background-color: #8e44ad;
            color: white;
        }
        .tab:hover {
            background-color: #7d3c98;
            color: white;
        }
        .calculator {
            background-color: #f8f9fa;
            border: 1px solid #dee2e6;
            border-radius: 0 0 8px 8px;
            padding: 25px;
            margin-bottom: 20px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }
        .form-group {
            margin-bottom: 20px;
        }
        label {
            display: block;
            margin-bottom: 5px;
            font-weight: bold;
            color: #2c3e50;
        }
        input, select {
            width: 100%;
            padding: 12px;
            border: 2px solid #e1e8ed;
            border-radius: 6px;
            font-size: 16px;
            box-sizing: border-box;
            transition: border-color 0.3s;
        }
        input:focus, select:focus {
            outline: none;
            border-color: #8e44ad;
            box-shadow: 0 0 5px rgba(142, 68, 173, 0.3);
        }
        .btn {
            background-color: #8e44ad;
            color: white;
            padding: 12px 25px;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            font-size: 16px;
            font-weight: bold;
            transition: background-color 0.3s;
            width: 100%;
        }
        .btn:hover {
            background-color: #7d3c98;
        }
        .result {
            background-color: #f4e6ff;
            border: 1px solid #d7bfff;
            border-radius: 6px;
            padding: 20px;
            margin-top: 20px;
            display: none;
        }
        .result h3 {
            color: #6a1b9a;
            margin-top: 0;
        }
        .breakdown {
            margin-top: 15px;
        }
        .breakdown-item {
            display: flex;
            justify-content: space-between;
            padding: 8px 0;
            border-bottom: 1px solid #d7bfff;
        }
        .breakdown-item:last-child {
            border-bottom: none;
            font-weight: bold;
            color: #6a1b9a;
        }
        .info-section {
            background-color: #e8f4f8;
            border-left: 4px solid #3498db;
            padding: 20px;
            margin: 20px 0;
        }
        .info-section h3 {
            color: #2980b9;
            margin-top: 0;
        }
        .fovissste-logo {
            background-color: #8e44ad;
            color: white;
            padding: 10px;
            border-radius: 6px;
            text-align: center;
            font-size: 18px;
            font-weight: bold;
            margin-bottom: 20px;
        }
        .credit-summary {
            background-color: #d4edda;
            border: 1px solid #c3e6cb;
            border-radius: 6px;
            padding: 15px;
            margin: 15px 0;
        }
        .credit-summary h4 {
            color: #155724;
            margin: 0 0 10px 0;
        }
        .warning-box {
            background-color: #fff3cd;
            border: 1px solid #ffeaa7;
            border-radius: 6px;
            padding: 15px;
            margin: 15px 0;
        }
        .warning-box h4 {
            color: #856404;
            margin: 0 0 10px 0;
        }
        .hidden {
            display: none;
        }
        @media (max-width: 768px) {
            body {
                padding: 10px;
            }
            .container {
                padding: 20px;
            }
            .calculator-tabs {
                flex-direction: column;
            }
            .tab {
                border-radius: 0;
            }
        }