* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #ffffff 0%, rgb(211, 214, 218) 100%);
            min-height: 100vh;
            padding: 20px;
        }

        .container {
            max-width: 1400px;
            margin: 0 auto;
            background: white;
            border-radius: 15px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            overflow: hidden;
        }

        .header {
            background: linear-gradient(135deg,#3e3d40 0%, #3e3d40 100%);
            color: white;
            padding: 30px;
            text-align: center;
            position: relative;
        }

        .header img {
            max-height: 80px;
            margin-bottom: 10px;
        }

        .admin-link {
            position: absolute;
            top: 20px;
            right: 20px;
            background: rgba(255,255,255,0.2);
            border: 2px solid rgba(255,255,255,0.3);
            color: white;
            padding: 10px 20px;
            border-radius: 25px;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            font-size: 14px;
        }

        .admin-link:hover {
            background: rgba(255,255,255,0.3);
            color: white;
            text-decoration: none;
        }

        .nav-tabs {
            display: flex;
            background: #f8f9fa;
            border-bottom: 2px solid #e9ecef;
        }

        .nav-tab {
            flex: 1;
            padding: 15px 20px;
            background: none;
            border: none;
            cursor: pointer;
            font-size: 16px;
            transition: all 0.3s ease;
        }

        .nav-tab:hover {
            background: #e9ecef;
        }

        .nav-tab.active {
            background: #29337C;
            color: white;
        }

        .tab-content {
            display: none;
            padding: 30px;
        }

        .tab-content.active {
            display: block;
        }

        .input-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }

        .input-group {
            background: #f8f9fa;
            padding: 20px;
            border-radius: 10px;
            border-left: 4px solid #29337C;
        }

        .input-group h3 {
            margin-bottom: 15px;
            color: #2c3e50;
            font-size: 1.3em;
        }

        .form-row {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
            gap: 15px;
        }

        .form-row:last-child {
            margin-bottom: 0;
        }

        .form-row label {
            flex: 1;
            font-weight: 500;
            color: #495057;
        }

        .form-row input {
            width: 120px;
            padding: 8px 12px;
            border: 2px solid #dee2e6;
            border-radius: 5px;
            font-size: 14px;
            transition: border-color 0.3s ease;
        }

        .form-row input:focus {
            outline: none;
            border-color: #29337C;
            box-shadow: 0 0 0 3px rgba(0,123,255,0.1);
        }

        .calculate-btn {
            background: linear-gradient(135deg, #29337C 0%, #29337C 100%);
            color: white;
            border: none;
            padding: 15px 40px;
            border-radius: 8px;
            font-size: 18px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(40,167,69,0.2);
        }

        .calculate-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(40,167,69,0.3);
        }

        .results-section {
            margin-top: 30px;
        }

        .results-table {
            width: 100%;
            border-collapse: collapse;
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
        }

        .results-table th {
            background: linear-gradient(135deg, #29337C 0%, #29337C 100%);
            color: white;
            padding: 15px;
            text-align: left;
            font-weight: 600;
        }

        .results-table td {
            padding: 12px 15px;
            border-bottom: 1px solid #dee2e6;
        }

        .results-table tr:nth-child(even) {
            background: #f8f9fa;
        }

        .results-table tr:hover {
            background: #e3f2fd;
        }

        .price-row {
            background: #e8f5e8 !important;
            font-weight: bold;
        }

        .total-row {
            background: #fff3cd !important;
            font-weight: bold;
            font-size: 1.1em;
        }

        .export-section {
            margin-top: 30px;
            text-align: center;
        }

        .export-btn {
            background: linear-gradient(135deg, #29337C 0%, #29337C 100%);
            color: white;
            border: none;
            padding: 12px 30px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            margin: 0 10px;
        }

        .export-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(220,53,69,0.3);
        }

        .footer {
            background: #f8f9fa;
            text-align: center;
            padding: 20px;
            color: #6c757d;
            border-top: 1px solid #dee2e6;
            font-size: 14px;
        }

        .currency {
            color: #28a745;
            font-weight: 600;
        }

        .hidden {
            display: none;
        }

        .loading-message {
            text-align: center;
            padding: 20px;
            color: #6c757d;
            font-style: italic;
        }

        .error-message {
            background: #f8d7da;
            color: #721c24;
            padding: 15px;
            border: 1px solid #f5c6cb;
            border-radius: 5px;
            margin: 20px;
        }

        @media (max-width: 768px) {
            .input-section {
                grid-template-columns: 1fr;
            }
            
            .nav-tabs {
                flex-direction: column;
            }
            
            .form-row {
                flex-direction: column;
                align-items: stretch;
            }
            
            .form-row input {
                width: 100%;
                margin-top: 5px;
            }

            .admin-link {
                position: static;
                display: inline-block;
                margin-top: 10px;
            }
        }