.excel-converter-wrapper {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        }
        
        .excel-converter-wrapper .hero-section {
            background-color: #e5332d;
            color: white;
            padding: 60px 0 80px;
            text-align: center;
        }
        
        .excel-converter-wrapper .hero-section h1 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 15px;
        }
        
        .excel-converter-wrapper .hero-section p {
            font-size: 1.15rem;
            opacity: 0.95;
            margin: 0;
        }
        
        .excel-converter-wrapper .converter-container {
            max-width: 900px;
            margin: -60px auto 60px;
            position: relative;
            z-index: 10;
        }
        
        .excel-converter-wrapper .upload-box {
            background: white;
            border-radius: 12px;
            box-shadow: 0 10px 40px rgba(0,0,0,0.1);
            padding: 50px 40px;
            text-align: center;
            border: 3px dashed #e5332d;
            transition: all 0.3s ease;
            cursor: pointer;
            position: relative;
        }
        
        .excel-converter-wrapper .upload-box:hover {
            border-color: #c42a24;
            box-shadow: 0 15px 50px rgba(229, 51, 45, 0.2);
            transform: translateY(-2px);
        }
        
        .excel-converter-wrapper .upload-box.dragover {
            background: #fff5f5;
            border-color: #e5332d;
            border-style: solid;
            transform: scale(1.02);
        }
        
        .excel-converter-wrapper .upload-icon {
            font-size: 72px;
            color: #e5332d;
            margin-bottom: 20px;
            display: inline-block;
        }
        
        .excel-converter-wrapper .upload-box h3 {
            color: #333;
            font-size: 1.6rem;
            margin-bottom: 12px;
            font-weight: 600;
        }
        
        .excel-converter-wrapper .upload-box p {
            color: #666;
            margin-bottom: 25px;
            font-size: 1rem;
        }
        
        .excel-converter-wrapper .btn-select {
            background-color: #e5332d;
            color: white;
            padding: 15px 45px;
            font-size: 1.1rem;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(229, 51, 45, 0.2);
        }
        
        .excel-converter-wrapper .btn-select:hover {
            background-color: #c42a24;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(229, 51, 45, 0.35);
        }
        
        .excel-converter-wrapper .btn-select:active {
            transform: translateY(0);
        }
        
        .excel-converter-wrapper .options-section {
            background: white;
            border-radius: 12px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
            padding: 35px;
            margin-top: 25px;
        }
        
        .excel-converter-wrapper .options-section h4 {
            color: #333;
            font-size: 1.25rem;
            margin-bottom: 20px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .excel-converter-wrapper .options-section h4 i {
            color: #e5332d;
        }
        
        .excel-converter-wrapper .option-card {
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            padding: 20px;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-bottom: 15px;
            background: #fafafa;
        }
        
        .excel-converter-wrapper .option-card:hover {
            border-color: #e5332d;
            background: white;
            transform: translateX(5px);
        }
        
        .excel-converter-wrapper .option-card.active {
            border-color: #e5332d;
            background: #fff5f5;
            box-shadow: 0 3px 15px rgba(229, 51, 45, 0.15);
        }
        
        .excel-converter-wrapper .option-card input[type="radio"] {
            width: 22px;
            height: 22px;
            accent-color: #e5332d;
            cursor: pointer;
        }
        
        .excel-converter-wrapper .option-label {
            font-weight: 600;
            color: #333;
            margin-bottom: 5px;
            font-size: 1.05rem;
        }
        
        .excel-converter-wrapper .option-desc {
            color: #666;
            font-size: 0.9rem;
            line-height: 1.5;
        }
        
        .excel-converter-wrapper .file-list {
            margin-top: 25px;
        }
        
        .excel-converter-wrapper .file-item {
            background: white;
            border-radius: 10px;
            padding: 20px;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 3px 15px rgba(0,0,0,0.06);
            transition: all 0.3s ease;
            border: 1px solid #f0f0f0;
        }
        
        .excel-converter-wrapper .file-item:hover {
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
            transform: translateY(-2px);
        }
        
        .excel-converter-wrapper .file-info {
            display: flex;
            align-items: center;
            gap: 18px;
            flex: 1;
        }
        
        .excel-converter-wrapper .file-icon {
            font-size: 42px;
            color: #217346;
            min-width: 50px;
            text-align: center;
        }
        
        .excel-converter-wrapper .file-details h5 {
            margin: 0;
            color: #333;
            font-size: 1.05rem;
            font-weight: 600;
            word-break: break-word;
        }
        
        .excel-converter-wrapper .file-details p {
            margin: 5px 0 0;
            color: #666;
            font-size: 0.875rem;
        }
        
        .excel-converter-wrapper .file-badge {
            background: #217346;
            color: white;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-left: 10px;
        }
        
        .excel-converter-wrapper .btn-remove {
            color: #e5332d;
            background: #fff5f5;
            border: none;
            font-size: 1.3rem;
            cursor: pointer;
            padding: 8px 12px;
            border-radius: 8px;
            transition: all 0.3s ease;
            min-width: 45px;
            height: 45px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .excel-converter-wrapper .btn-remove:hover {
            background-color: #e5332d;
            color: white;
            transform: scale(1.1);
        }
        
        .excel-converter-wrapper .btn-convert {
            background-color: #e5332d;
            color: white;
            padding: 18px 50px;
            font-size: 1.25rem;
            border: none;
            border-radius: 10px;
            font-weight: 600;
            width: 100%;
            margin-top: 30px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(229, 51, 45, 0.3);
        }
        
        .excel-converter-wrapper .btn-convert:hover:not(:disabled) {
            background-color: #c42a24;
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(229, 51, 45, 0.4);
        }
        
        .excel-converter-wrapper .btn-convert:active:not(:disabled) {
            transform: translateY(-1px);
        }
        
        .excel-converter-wrapper .btn-convert:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none;
        }
        
        .excel-converter-wrapper .progress-section {
            margin-top: 30px;
            display: none;
        }
        
        .excel-converter-wrapper .progress-container {
            background: white;
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
        }
        
        .excel-converter-wrapper .progress {
            height: 35px;
            border-radius: 20px;
            background-color: #f0f0f0;
            overflow: hidden;
        }
        
        .excel-converter-wrapper .progress-bar {
            background-color: #e5332d;
            border-radius: 20px;
            transition: width 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            font-size: 0.95rem;
        }
        
        .excel-converter-wrapper .progress-text {
            text-align: center;
            margin-top: 15px;
            color: #666;
            font-size: 1rem;
        }
        
        .excel-converter-wrapper .how-to-section {
            max-width: 900px;
            margin: 80px auto 60px;
            padding: 0 20px;
        }
        
        .excel-converter-wrapper .how-to-section h2 {
            color: #333;
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 50px;
            text-align: center;
            position: relative;
            padding-bottom: 20px;
        }
        
        .excel-converter-wrapper .how-to-section h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background-color: #e5332d;
            border-radius: 2px;
        }
        
        .excel-converter-wrapper .step-card {
            background: white;
            border-radius: 12px;
            padding: 35px;
            margin-bottom: 30px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
            transition: all 0.3s ease;
            border-left: 5px solid #e5332d;
        }
        
        .excel-converter-wrapper .step-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 35px rgba(0,0,0,0.12);
        }
        
        .excel-converter-wrapper .step-header {
            display: flex;
            align-items: center;
            gap: 20px;
            margin-bottom: 15px;
        }
        
        .excel-converter-wrapper .step-number {
            background-color: #e5332d;
            color: white;
            width: 55px;
            height: 55px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            font-weight: 700;
            flex-shrink: 0;
            box-shadow: 0 4px 15px rgba(229, 51, 45, 0.3);
        }
        
        .excel-converter-wrapper .step-card h3 {
            color: #333;
            font-size: 1.4rem;
            font-weight: 600;
            margin: 0;
        }
        
        .excel-converter-wrapper .step-card p {
            color: #666;
            line-height: 1.7;
            margin: 0;
            font-size: 1.02rem;
        }
        
        .excel-converter-wrapper .modal-content {
            border-radius: 15px;
            border: none;
            overflow: hidden;
        }
        
        .excel-converter-wrapper .modal-header {
            background-color: #e5332d;
            color: white;
            border-radius: 0;
            padding: 25px 30px;
            border: none;
        }
        
        .excel-converter-wrapper .modal-header .modal-title {
            font-weight: 600;
            font-size: 1.3rem;
        }
        
        .excel-converter-wrapper .modal-header .btn-close {
            filter: brightness(0) invert(1);
            opacity: 1;
        }
        
        .excel-converter-wrapper .modal-body {
            padding: 40px 35px;
        }
        
        .excel-converter-wrapper .modal-icon {
            font-size: 72px;
            margin-bottom: 25px;
        }
        
        .excel-converter-wrapper .modal-icon.success {
            color: #28a745;
        }
        
        .excel-converter-wrapper .modal-icon.error {
            color: #dc3545;
        }
        
        .excel-converter-wrapper .modal-body h4 {
            color: #333;
            font-size: 1.4rem;
            font-weight: 600;
            margin-bottom: 15px;
        }
        
        .excel-converter-wrapper .modal-body .text-muted {
            color: #666 !important;
            font-size: 1.05rem;
        }
        
        .excel-converter-wrapper .btn-download {
            background-color: #28a745;
            color: white;
            padding: 14px 40px;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1.05rem;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(40, 167, 69, 0.3);
        }
        
        .excel-converter-wrapper .btn-download:hover {
            background-color: #218838;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(40, 167, 69, 0.4);
        }
        
        .excel-converter-wrapper .btn-secondary-modal {
            background-color: #6c757d;
            color: white;
            padding: 14px 40px;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1.05rem;
            margin-left: 12px;
            transition: all 0.3s ease;
        }
        
        .excel-converter-wrapper .btn-secondary-modal:hover {
            background-color: #5a6268;
            transform: translateY(-2px);
        }
        
        .excel-converter-wrapper .supported-formats {
            margin-top: 20px;
            padding: 15px;
            background: #f8f9fa;
            border-radius: 8px;
            text-align: center;
        }
        
        .excel-converter-wrapper .supported-formats p {
            margin: 0;
            color: #666;
            font-size: 0.9rem;
        }
        
        .excel-converter-wrapper .format-badge {
            display: inline-block;
            background: white;
            padding: 5px 12px;
            border-radius: 5px;
            margin: 5px 3px;
            font-weight: 600;
            color: #217346;
            font-size: 0.85rem;
            border: 1px solid #e0e0e0;
        }