/* Add to CSS */
        #back-button {
            padding: 4px 12px;
            margin-right: 8px;
            background: #0078d4;
            color: white;
            border: none;
            border-radius: 3px;
            cursor: pointer;
            transition: background 0.2s;
        }

        #back-button:hover {
            background: #006cbd;
        }

        #back-button:active {
            background: #005da4;
        }
        
        /* Improved CSS Layout */
        .explorer-container {
            display: grid;
            grid-template-rows: auto 1fr auto;
            height: auto;
            font-family: 'Segoe UI', Arial, sans-serif;
        }

        #address-bar {
            padding: 8px;
            background: #f0f0f0;
            border-bottom: 1px solid #ddd;
            display: flex;
            align-items: center;
        }

        #current-path {
            flex-grow: 1;
            padding: 4px 8px;
            margin: 0 8px;
            border: 1px solid #ccc;
            border-radius: 3px;
        }

        .main-content {
            display: grid;
            grid-template-columns: 250px 1fr;
            height: calc(80vh - 90px);
        }

        #sidebar {
            border-right: 1px solid #ddd;
            background: #f8f8f8;
            overflow-y: auto;
        }

        #main-area {
            padding: 12px;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
            gap: 12px;
            align-content: start;
            overflow-y: auto;
        }

        .folder-item, .file-item {
            padding: 6px;
            text-align: center;
            border-radius: 4px;
            cursor: pointer;
            font-size: 12px;
            min-height: 70px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
        }

        .folder-item .item-icon,
        .file-item .item-icon {
            font-size: 32px;
            margin-bottom: 4px;
            line-height: 1;
        }

        .folder-item .item-name,
        .file-item .item-name {
            font-size: 11px;
            line-height: 1.2;
            word-break: break-word;
            text-overflow: ellipsis;
            overflow: hidden;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            max-height: 24px;
        }

        .folder-item:hover, .file-item:hover {
            background: #e5f3ff;
        }

        #select-button {
            cursor: pointer;
        }

        /* Context Menu Styles */
        .context-menu {
            position: absolute;
            background: white;
            border: 1px solid #ddd;
            box-shadow: 2px 2px 5px rgba(0,0,0,0.2);
            z-index: 1099;
        }

        .context-menu-item {
            padding: 8px 16px;
            cursor: pointer;
        }

        .context-menu-item:hover {
            background: #f0f0f0;
        }

        /* Existing Tree Styles Modified */
        .tree-node {
            padding: 4px 0px 0px 20px;
        }

        .tree-node {
            border-left: 2px solid #0078d4;
        }
        .folder{
            display: block;
            cursor: pointer;
        }
        .file{
            display: block;
            cursor: pointer;
        }
        .folder:before{
            content:"📁";
        }
        .file:before{
            content:"📄";
        }


        .node-content {
            padding: 4px 8px;
            cursor: pointer;
        }

        .add-btn, .delete-btn, .select-btn {
            margin-left: 4px;
            padding: 2px 6px;
            font-size: 0.8em;
        }

        /* ARC Structure Indicators */
        .arc-indicator {
            display: inline-block;
            margin-left: 8px;
            padding: 2px 6px;
            border-radius: 12px;
            background-color: rgba(255, 255, 255, 0.8);
            font-size: 11px;
            font-weight: bold;
            white-space: nowrap;
            border: 1px solid currentColor;
            opacity: 0.9;
            transition: opacity 0.2s ease;
        }

        .tree-node:hover .arc-indicator {
            opacity: 1;
        }

        .tree-node {
            padding: 2px 4px;
            margin: 1px 0;
            border-radius: 4px;
            transition: background-color 0.2s ease;
        }

        .tree-node:hover {
            background-color: #f0f8ff !important;
        }

        /* Path selection feedback styling */
        #path-selection-feedback {
            animation: fadeInSlide 0.3s ease-out;
        }

        @keyframes fadeInSlide {
            from {
                opacity: 0;
                transform: translateX(20px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        /* New Folder Button */
        #new-folder-button {
            margin-left: 8px;
            padding: 4px 12px;
            background: #28a745;
            color: white;
            border: none;
            border-radius: 3px;
            cursor: pointer;
            transition: background 0.2s;
            font-size: 14px;
        }

        #new-folder-button:hover {
            background: #218838;
        }

        #new-folder-button:active {
            background: #1e7e34;
        }

        /* Enhanced Main Content Layout for Preview */
        .main-content.with-preview {
            grid-template-columns: 250px 1fr 400px;
        }

        /* Preview Panel Styles */
        .preview-panel {
            border-left: 1px solid #ddd;
            background: #fafafa;
            display: flex;
            flex-direction: column;
            max-height: calc(80vh - 90px);
        }

        .preview-header {
            padding: 12px 16px;
            border-bottom: 1px solid #ddd;
            background: #f8f9fa;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .preview-header h5 {
            margin: 0;
            font-size: 16px;
            font-weight: 600;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: calc(100% - 250px);
            flex-shrink: 1;
        }

        .preview-header-actions {
            display: flex;
            align-items: center;
        }

        /* Offcanvas specific styles */
        .offcanvas-content-wrapper {
            height: 100%;
        }

        .preview-navigation .nav-tabs {
            border-bottom: none;
        }

        .preview-navigation .nav-link {
            font-size: 12px;
            padding: 6px 12px;
        }

        /* Excel sheet tabs */
        .sheet-tabs {
            display: flex;
            gap: 4px;
            flex-wrap: wrap;
        }

        .sheet-tab {
            padding: 4px 8px;
            border: 1px solid #dee2e6;
            border-radius: 4px;
            background: #f8f9fa;
            cursor: pointer;
            font-size: 12px;
            transition: all 0.2s;
        }

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

        .sheet-tab.active {
            background: #0d6efd;
            color: white;
            border-color: #0d6efd;
        }

        /* Enhanced table styles for Excel */
        .excel-preview {
            overflow: auto;
            height: 100%;
        }

        .excel-preview table {
            width: 100%;
            border-collapse: collapse;
            font-size: 11px;
            table-layout: fixed;
        }

        .excel-preview th,
        .excel-preview td {
            border: 1px solid #ddd;
            padding: 4px 6px;
            text-align: left;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            min-width: 80px;
        }

        .excel-preview th {
            background: #f8f9fa;
            font-weight: 600;
            position: sticky;
            top: 0;
            z-index: 10;
        }

        .excel-preview tr:nth-child(even) {
            background: #f9f9f9;
        }

        /* Pagination controls */
        .excel-pagination {
            padding: 12px;
            border-top: 1px solid #ddd;
            background: #f8f9fa;
            display: flex;
            justify-content: between;
            align-items: center;
            gap: 12px;
        }

        .excel-info {
            font-size: 12px;
            color: #6c757d;
        }

        .preview-content {
            flex: 1;
            padding: 16px;
            overflow-y: auto;
        }

        .preview-actions {
            padding: 12px 16px;
            border-top: 1px solid #ddd;
            background: #f8f9fa;
            display: flex;
            gap: 8px;
            justify-content: flex-end;
        }

        /* Text Preview Styles */
        .text-preview-editor {
            width: 100%;
            min-height: 300px;
            border: 1px solid #ddd;
            border-radius: 4px;
            padding: 12px;
            font-family: 'Courier New', monospace;
            font-size: 14px;
            resize: vertical;
        }

        /* Image Preview Styles */
        .image-preview {
            text-align: center;
        }

        .image-preview img {
            max-width: 100%;
            max-height: 400px;
            border-radius: 4px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
        }

        /* Table Preview Styles */
        .table-preview {
            overflow-x: auto;
        }

        .table-preview table {
            width: 100%;
            border-collapse: collapse;
            font-size: 12px;
        }

        .table-preview th,
        .table-preview td {
            border: 1px solid #ddd;
            padding: 6px 8px;
            text-align: left;
        }

        .table-preview th {
            background: #f8f9fa;
            font-weight: 600;
        }

        .table-preview tr:nth-child(even) {
            background: #f9f9f9;
        }

        /* Enhanced Context Menu */
        .context-menu {
            min-width: 150px;
            border-radius: 4px;
            overflow: hidden;
        }

        .context-menu-item {
            font-size: 14px;
            border: none;
            background: none;
            width: 100%;
            text-align: left;
        }

        .context-menu-item:first-child {
            border-top: none;
        }

        .context-menu-separator {
            height: 1px;
            background: #eee;
            margin: 4px 0;
        }

        /* File Type Icons Enhancement - Using JavaScript-generated icons only */

        /* Loading Animation */
        .loading-spinner {
            border: 2px solid #f3f3f3;
            border-top: 2px solid #0078d4;
            border-radius: 50%;
            width: 20px;
            height: 20px;
            animation: spin 1s linear infinite;
            display: inline-block;
            margin-right: 8px;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        /* Button Loading States */
        .btn-loading-state {
            transition: all 0.3s ease;
        }

        .btn-loading-state:disabled {
            opacity: 0.7;
            cursor: not-allowed;
        }

        .btn-loading-content {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .btn-spinner {
            width: 14px;
            height: 14px;
            border: 2px solid transparent;
            border-top: 2px solid currentColor;
            border-radius: 50%;
            animation: btn-spin 1s linear infinite;
        }

        @keyframes btn-spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        /* ARC Clone Button Specific */
        .clone-arc-btn {
            position: relative;
            min-width: 200px;
        }

        .clone-arc-btn .btn-content,
        .clone-arc-btn .btn-loading {
            transition: opacity 0.2s ease;
        }

        /* Convert Container Width Consistency */
        .convert-container {
            max-width: 100%;
            margin-left: 0;
            margin-right: 0;
        }

        /* Ensure col-lg-12 matches container width */
        .col-12 .convert-container,
        .col-lg-12 .convert-container {
            width: 100%;
        }

        /* Fix Bootstrap row negative margins for convert-container */
        .convert-container.row {
            margin-left: 0;
            margin-right: 0;
        }

        /* Consistent padding for convert containers */
        .convert-container {
            padding-left: 1rem;
            padding-right: 1rem;
        }

        /* Improve form control spacing */
        .convert-container .form-control {
            margin-bottom: 0.5rem;
        }

        /* Better alignment for inline elements */
        .convert-container .col-lg-3,
        .convert-container .col-3 {
            padding-left: 0.75rem;
            padding-right: 0.75rem;
        }

        /* Toggle switch styling improvement */
        .form-check-switch {
            padding-left: 2.5rem;
        }

        .form-check-switch .form-check-input {
            width: 3rem;
            height: 1.5rem;
            margin-left: -2.5rem;
        }

        .form-check-switch .form-check-label {
            font-size: 0.95rem;
            color: #495057;
        }

        /* Button group spacing */
        .convert-container .btn {
            margin: 0.25rem;
        }

        /* Lead text consistency */
        .convert-container .lead {
            font-size: 1.1rem;
            font-weight: 500;
            margin-bottom: 0.5rem;
        }