:root {
            --primary-color: #000000;
            --secondary-color: #333333;
            --accent-color: #000000;
            --light-bg: #f8f9fa;
            --border-color: #dee2e6;
            --sidebar-width: 340px;
            --viewer-surface: #ebebeb;
            --tool-icon-teal: #1abc9c;
        }

        html {
            margin: 0;
            padding: 0;
            min-height: 100%;
            background-color: var(--light-bg);
            max-width: 100%;
            width: 100%;
        }
        html:not(.itqan-editor-active) { overflow-x: visible; }
        body, body.bg-light-subtle {
            margin: 0;
            padding: 0;
            min-height: 100vh;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: var(--light-bg) !important;
            overflow-x: hidden;
        }
        html:not(.itqan-editor-active) body.bg-light-subtle {
            overflow-x: visible;
            overflow-y: auto;
        }
        .merge-seo-intro { opacity: 0.82; line-height: 1.7; max-width: 42rem; margin-inline: auto; }
        #mergePageHeader .display-5 {
            font-size: clamp(1.75rem, 3.5vw, 2.15rem);
            margin-bottom: 0.15rem !important;
            line-height: 1.2;
        }
        #mergePageHeader .lead {
            margin-bottom: 0;
            font-size: 0.98rem;
            line-height: 1.3;
        }
        html.itqan-editor-active {
            height: 100%;
            overflow: hidden;
        }
        html.itqan-editor-active body.bg-light-subtle {
            overflow: hidden !important;
            height: 100%;
            max-height: 100dvh;
        }
        html.itqan-editor-active nav.navbar.navbar-expand-xl.navbar-dark.bg-dark {
            position: sticky;
            top: 0;
            z-index: 1040;
        }
        html.itqan-editor-active .navbar .dropdown-menu { z-index: 1060 !important; }
        html.itqan-editor-active .nav-dropdown-wrapper { z-index: 1045; }
        html.itqan-editor-active .nav-dropdown-menu { z-index: 1050; }
        @media (min-width: 1200px) {
            html.itqan-editor-active .navbar.navbar-expand-xl #navbarNav.collapse.navbar-collapse {
                max-height: none !important;
                overflow: visible !important;
            }
        }
        .merge-sidebar-help-btn {
            width: 100%;
            margin: 0 0 0.85rem;
            padding: 0.55rem 0.75rem;
            font-size: 0.82rem;
            font-weight: 600;
            border: 1px dashed var(--border-color);
            border-radius: 8px;
            background: #fff;
            color: #333;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.45rem;
            transition: background 0.15s ease, border-color 0.15s ease;
            cursor: pointer;
        }
        .merge-sidebar-help-btn:hover {
            background: #f8f9fa;
            border-color: #adb5bd;
            color: #111;
        }
.merge-seo-content { margin-top: 2.5rem; padding-top: 1.75rem; border-top: 1px solid var(--border-color); max-width: 42rem; margin-left: auto; margin-right: auto; }
        .merge-seo-content--modal { margin-top: 0; padding-top: 0; border-top: none; max-width: none; }
        .merge-seo-steps { list-style: none; padding: 0; margin: 0; counter-reset: merge-howto-step; }
        .merge-seo-steps li { counter-increment: merge-howto-step; display: flex; gap: 0.85rem; align-items: flex-start; padding: 0.55rem 0; color: #495057; font-size: 0.95rem; line-height: 1.55; }
        .merge-seo-steps li::before { content: counter(merge-howto-step); flex-shrink: 0; width: 1.65rem; height: 1.65rem; border-radius: 50%; background: #111; color: #fff; font-size: 0.8rem; font-weight: 700; display: flex; align-items: center; justify-content: center; margin-top: 0.1rem; }
        .merge-seo-faq .accordion-button { font-size: 0.95rem; font-weight: 600; padding: 0.85rem 1rem; }
        .merge-seo-faq .accordion-button:not(.collapsed) { background: #f8f9fa; color: #111; box-shadow: none; }
        .merge-seo-faq .accordion-item { border-color: var(--border-color); }
        .main-editor {
            display: none;
            height: calc(100vh - 60px);
            flex-direction: row;
            min-width: 0;
            min-height: 0;
        }
        html.itqan-editor-active #editor-section.main-editor {
            display: flex !important;
            position: fixed;
            left: 0;
            right: 0;
            bottom: 0;
            top: var(--itqan-editor-top, 72px);
            height: auto !important;
            min-height: 0 !important;
            box-sizing: border-box;
            z-index: 1;
        }
        #editor-section .sidebar {
            width: var(--sidebar-width);
            min-width: var(--sidebar-width);
            flex: 0 0 var(--sidebar-width);
            background: #fff;
            border-left: 1px solid #ddd;
            display: flex;
            flex-direction: column;
            position: relative;
            z-index: 1;
            overflow: hidden;
            min-height: 0;
            height: 100%;
        }
        #editor-section .sidebar .merge-sidebar-body {
            padding-top: 0;
            flex: 1 1 auto;
            min-height: 0;
            overflow-x: hidden;
            overflow-y: auto;
            overscroll-behavior-y: contain;
        }
        .merge-sidebar-header {
            flex-shrink: 0;
            padding: 16px 18px;
            border-bottom: 1px solid #eee;
            font-weight: 700;
            font-size: 17px;
            line-height: 1.35;
            background: #fff;
            position: relative;
            z-index: 2;
            text-align: center;
            color: #222;
        }
        .merge-sidebar-body {
            padding: 16px 18px 12px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        #editor-section .sidebar > .merge-sidebar-footer {
            flex-shrink: 0;
            margin-top: auto;
            padding: 14px 18px 18px;
            border-top: 1px solid #eee;
            background: #fff;
            z-index: 2;
        }
        .merge-sidebar-section {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
        }
        .merge-sidebar-label {
            font-size: 0.8rem;
            font-weight: 700;
            color: #666;
            text-align: center;
            margin: 0;
        }
        #editor-section .merge-cloud-stack {
            display: flex;
            flex-direction: row;
            gap: 12px;
            align-items: center;
            justify-content: center;
            padding: 12px 14px;
            background: #f8f9fa;
            border: 1px dashed #dee2e6;
            border-radius: 10px;
            width: 100%;
            box-sizing: border-box;
        }
        .merge-sidebar-btn-clear {
            width: 100%;
            padding: 10px 14px;
            border-radius: 10px;
            border: 1px solid #ddd;
            background: #f5f5f5;
            color: #444;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: background 0.2s, border-color 0.2s;
        }
        .merge-sidebar-btn-clear:hover {
            background: #eee;
            border-color: #bbb;
            color: #222;
        }
        .btn-finish {
            background: #000;
            color: #fff;
            width: 100%;
            border: none;
            padding: 15px;
            font-size: 18px;
            font-weight: 700;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .btn-finish:hover:not(:disabled) {
            background: #222;
            color: #fff;
        }
        .btn-finish:disabled {
            opacity: 0.55;
            cursor: not-allowed;
        }
        .viewer-container {
            flex: 1 1 auto;
            min-width: 0;
            min-height: 0;
            background: var(--viewer-surface);
            overflow: hidden;
            padding: 0 12px 12px;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .viewer-container #adContainerViewer {
            margin-top: 16px;
            flex-shrink: 0;
            text-align: center;
        }
        .viewer-container #adContainerViewer ins.adsbygoogle {
            display: inline-block !important;
            width: min(100%, 728px) !important;
            max-width: 100% !important;
            margin-left: auto !important;
            margin-right: auto !important;
        }
        #mergeFilePages {
            min-width: 0;
            width: 100%;
            flex: 1 1 auto;
            min-height: 0;
            overflow-y: auto;
            overflow-x: hidden;
            overscroll-behavior-y: contain;
            padding-top: 8px;
        }
        html.itqan-editor-active #pagePreview.pdf-viewer-container {
            border: none;
            border-radius: 0;
            background: transparent;
            max-height: none;
            overflow: visible;
            padding: 25px;
            width: 100%;
            box-sizing: border-box;
        }
        #editor-section .loading-spinner {
            flex-shrink: 0;
            padding: 24px;
        }
        .merge-stats-sidebar.stats-card {
            display: flex;
            flex-direction: column;
            gap: 0;
            margin: 0;
            width: 100%;
            background: transparent;
            border: none;
            padding: 0;
        }
        .merge-stats-sidebar .merge-stat-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 0;
            border-bottom: 1px solid #f0f0f0;
        }
        .merge-stats-sidebar .merge-stat-item:last-child { border-bottom: 0; }
        .merge-stats-sidebar .merge-stat-icon {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: #111;
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            flex-shrink: 0;
        }
        .merge-stats-sidebar .merge-stat-text strong {
            display: block;
            font-size: 0.95rem;
            line-height: 1.15;
        }
        .merge-stats-sidebar .merge-stat-text small {
            font-size: 0.72rem;
            color: #888;
        }
        #editor-section .sidebar .preview-controls-wrap {
            display: none;
            flex-direction: column;
            gap: 12px;
            width: 100%;
            margin: 0 0 4px;
        }
        #editor-section .sidebar .preview-control-card {
            width: 100%;
            box-sizing: border-box;
        }
        #editor-section .sidebar .preview-control-card__btns {
            justify-content: flex-start;
        }
        @media (max-width: 991.98px) {
            html.itqan-editor-active {
                overflow: auto !important;
                height: auto !important;
            }
            html.itqan-editor-active body {
                overflow: auto !important;
                height: auto !important;
                max-height: none !important;
            }
            .main-editor { flex-direction: column !important; height: auto !important; }
            html.itqan-editor-active #editor-section.main-editor {
                position: relative !important;
                flex-direction: column !important;
                height: auto !important;
                top: auto !important; left: auto !important; right: auto !important; bottom: auto !important;
            }
            #editor-section .sidebar {
                order: 1 !important;
                position: relative !important;
                width: 100% !important;
                min-width: 0 !important;
                max-height: none !important;
                height: auto !important;
                flex: none !important;
                border-left: none;
                border-top: 1px solid #ddd;
            }
            #editor-section .sidebar .merge-sidebar-body {
                overflow: visible !important;
                max-height: none !important;
                height: auto !important;
            }
            .viewer-container {
                order: 2 !important;
                width: 100% !important;
                min-height: 50vh;
                height: auto !important;
                overflow: visible !important;
                padding-bottom: 80px !important;
            }
            #editor-section .sidebar > .merge-sidebar-footer,
            .main-editor .p-3 {
                position: fixed;
                bottom: 0; left: 0; right: 0;
                z-index: 1050;
                padding: 12px 16px calc(12px + env(safe-area-inset-bottom, 0px)) !important;
                background: #fff;
                border-top: 1px solid #e8e8e8;
                box-shadow: 0 -4px 20px rgba(0,0,0,0.1);
            }
            .btn-finish {
                padding: 14px !important;
                font-size: 16px !important;
                border-radius: 10px !important;
            }
            html.itqan-editor-active .tool-seo-visible-wrap,
            html.itqan-editor-active .merge-seo-content {
                display: none !important;
            }
        }

        .upload-pick-wrap {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            transform: none;
            position: relative;
            z-index: 20;
            flex-wrap: nowrap;
            max-width: 100%;
            box-sizing: border-box;
        }
        .upload-cloud-stack {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            position: relative;
            z-index: 220;
            pointer-events: auto;
            width: auto;
            flex: 0 0 auto;
        }
        .upload-cloud-stack .cloud-icon,
        .upload-cloud-stack .cloud-upload-btn {
            pointer-events: auto;
            flex-shrink: 0;
        }
        .upload-cloud-stack .cloud-icon {
            margin-bottom: 0 !important;
        }
        .upload-cloud-spacer {
            width: 44px;
            flex: 0 0 44px;
            visibility: hidden;
            pointer-events: none;
        }
        #selectFilesBtn {
            white-space: nowrap;
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        :root {
            --itqan-tool-panel-w: 46.5rem;
        }
#upload-section #dropArea.upload-area {
            width: min(100%, var(--itqan-tool-panel-w));
            max-width: min(100%, var(--itqan-tool-panel-w));
            margin-left: auto;
            margin-right: auto;
            padding: 0.65rem 1.55rem 0.45rem !important;
            box-shadow: none !important;
            overflow: visible !important;
            background: var(--light-bg, #f8f9fa) !important;
        }
        #upload-section #dropArea .card-body,
        #upload-section #dropArea .upload-row-wrap,
        #upload-section #dropArea .d-flex.justify-content-center,
        #upload-section #dropArea .upload-pick-wrap,
        #upload-section #dropArea .upload-cloud-stack,
        #upload-section #dropArea .cloud-icon {
            overflow: visible !important;
        }
        #upload-section .cloud-tooltip {
            display: none !important;
        }
        @media (min-width: 576px) {
            #upload-section .upload-cloud-stack {
                flex-direction: column !important;
                gap: 8px !important;
                width: auto !important;
                flex: 0 0 auto !important;
            }
            #upload-section .upload-pick-wrap {
                flex-wrap: nowrap !important;
                flex-direction: row !important;
            }
            #upload-section .upload-cloud-spacer {
                display: block;
            }
            #upload-section #dropArea.upload-area,
            #upload-section #dropArea .card-body,
            #upload-section #dropArea .upload-row-wrap,
            #upload-section #dropArea .d-flex.justify-content-center {
                overflow: visible !important;
            }
        }
        @media (max-width: 1199.98px) {
            #upload-section .upload-cloud-stack {
                flex-direction: row !important;
                justify-content: center !important;
                gap: 12px !important;
                width: auto !important;
                flex: 0 0 auto !important;
            }
        }
        @media (min-width: 992px) {
            #upload-section,
            #upload-section .container.my-5,
            #upload-section .row,
            #upload-section .col-lg-8 {
                max-width: 100%;
                min-width: 0;
                overflow: visible !important;
            }
            #upload-section #dropArea.upload-area {
                padding-block: 0.75rem 0.5rem !important;
                padding-inline: 1.55rem !important;
                overflow: visible !important;
            }
        }
        @media (max-width: 575.98px) {
            #upload-section #dropArea.upload-area {
                width: 100%;
                padding: 1rem !important;
                overflow: visible !important;
            }
            #upload-section #dropArea .card-body,
            #upload-section #dropArea .upload-row-wrap {
                overflow: visible !important;
            }
        }
        #dropArea, .upload-area.card {
            overflow: visible;
            max-width: 100%;
            background: var(--light-bg, #f8f9fa) !important;
            box-shadow: none !important;
            border: 2px dashed #ced4da !important;
        }
        .upload-area {
            position: relative;
            cursor: pointer;
            isolation: isolate;
            transition: background-color 0.3s ease, border-color 0.3s ease;
            border: 2px dashed #ced4da;
            border-radius: 12px;
            background: var(--light-bg, #f8f9fa);
            min-height: auto;
        }
        #upload-section #dropArea .card-body {
            padding: 0.3rem 0.85rem 0.2rem;
            overflow: visible;
            width: 100%;
        }
        #upload-section #dropArea .upload-row-wrap {
            overflow: visible;
            width: 100%;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .upload-area:hover,
        .upload-area.dragover {
            background-color: #eef0f2;
            border-color: #6b7280 !important;
        }
        
        #pdfUpload {
            position: absolute;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            opacity: 0;
            cursor: pointer;
            z-index: 10;
            font-size: 0;
            color: transparent;
        }
        #pdfUpload::file-selector-button {
            display: none;
        }

        .pdf-viewer-container {
            border: 1px solid #dee2e6;
            border-radius: 8px;
            background: #f8f9fa;
            padding: 25px;
            max-height: 800px;
            overflow-y: auto;
            overflow-x: auto;
        }

        .pdf-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 30px;
            margin-bottom: 15px;
        }

        .pdf-grid.single-page-view {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 30px;
            max-width: 220px;
            width: 100%;
            margin: 0 auto;
            justify-content: flex-start;
        }

        .pdf-thumbnail-wrapper {
            position: relative;
            display: flex;
            flex-direction: column;
            gap: 8px;
            transition: transform 0.3s ease;
            padding: 10px;
            border-radius: 8px;
            background: white;
            border: 2px solid transparent;
        }

        .pdf-thumbnail-wrapper:hover {
            border-color: #dee2e6;
            background: #f8f9fa;
        }

        .pdf-thumbnail-wrapper.page-marked-delete {
            border-color: rgba(222, 226, 230, 0.95);
            background: #fff;
        }
        .pdf-thumbnail-wrapper.page-marked-delete .pdf-thumbnail {
            border-color: rgba(224, 49, 49, 0.4);
        }

        .pdf-grid.single-page-view .pdf-thumbnail-wrapper {
            border: none;
            padding: 0;
            margin: 0;
            border-radius: 0;
            background: transparent;
            gap: 10px;
        }

        .pdf-thumbnail-buttons {
            display: flex;
            gap: 6px;
            justify-content: center;
        }

        .pdf-action-btn {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid #dee2e6;
            background: white;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s;
            font-size: 14px;
        }

        .pdf-action-btn.delete {
            color: #dc3545;
        }

        .pdf-action-btn.delete:hover {
            background: #dc3545;
            color: white;
            border-color: #dc3545;
        }

        .pdf-action-btn.rotate {
            color: #28a745;
        }

        .pdf-action-btn.rotate:hover {
            background: #28a745;
            color: white;
            border-color: #28a745;
        }

        .pdf-thumbnail {
            background: white;
            border: 1px solid #dee2e6;
            border-radius: 6px;
            padding: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
            width: 100%;
            aspect-ratio: 8.5 / 11;
            min-height: 220px;
        }

        .pdf-grid.single-page-view .pdf-thumbnail,
        .file-grid.single-page-view .pdf-thumbnail {
            border: 1px solid #dee2e6;
            border-radius: 6px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
            aspect-ratio: 8.5 / 11;
            width: 100%;
            min-height: 220px;
            max-width: none;
            max-height: none;
        }

        .pdf-thumbnail.landscape {
            aspect-ratio: 11 / 8.5;
            min-height: 160px;
        }

        .pdf-grid.single-page-view .pdf-thumbnail.landscape,
        .file-grid.single-page-view .pdf-thumbnail.landscape {
            aspect-ratio: 11 / 8.5;
            min-height: 160px;
        }

        .pdf-thumbnail:hover {
            box-shadow: 0 2px 6px rgba(0,0,0,0.15);
            border-color: #000;
        }

        .pdf-thumbnail img {
            width: 100%;
            height: 100%;
            max-width: 100%;
            max-height: 100%;
            object-fit: contain;
            object-position: center;
            display: block;
            transform-origin: center center;
            transition: opacity 0.2s ease, filter 0.25s ease, transform 0.25s ease;
        }

        .pdf-thumbnail img.rotated-90,
        .pdf-thumbnail img.rotated-180,
        .pdf-thumbnail img.rotated-270 {
            max-width: none;
            max-height: none;
        }
        .pdf-delete-overlay {
            position: absolute;
            inset: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            pointer-events: none;
            background: rgba(255, 255, 255, 0.42);
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.22s ease, visibility 0.22s ease;
        }
        .pdf-thumbnail-wrapper.page-marked-delete .pdf-delete-overlay {
            opacity: 1;
            visibility: visible;
        }
        .pdf-thumbnail-wrapper.page-marked-delete .pdf-thumbnail img {
            filter: grayscale(0.45) brightness(0.9);
            opacity: 0.52;
        }
        .pdf-delete-overlay i {
            font-size: clamp(2.25rem, 10vw, 3.75rem);
            color: #E03131;
            line-height: 1;
            filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.18));
        }

        .pdf-page-name {
            text-align: center;
            font-size: 0.75rem;
            color: #666;
            word-break: break-word;
            overflow: hidden;
            text-overflow: ellipsis;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        .pdf-grid.single-page-view .pdf-page-name {
            font-size: 0.8rem;
            color: #333;
            font-weight: 500;
            text-align: center;
            margin-top: 10px;
        }
        
        .additional-upload-row {
            display: flex;
            gap: 15px;
            justify-content: center;
            align-items: center;
            margin: 15px 0;
            padding: 12px;
            background: #f8f9fa;
            border-radius: 6px;
            border: 1px dashed #dee2e6;
        }
        
        .cloud-upload-btn {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 2px solid #dee2e6;
            background: white;
            transition: all 0.3s;
            cursor: pointer;
            padding: 0;
            position: relative;
            z-index: 100;
        }
        
        .cloud-upload-btn:hover {
            border-color: #000;
            transform: scale(1.1);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
        }
        
        .stats-card {
            background: white;
            border-radius: 8px;
            padding: 15px;
            border: 1px solid var(--border-color);
        }
        
        .feature-icon {
            width: 45px;
            height: 45px;
            background: var(--primary-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 10px;
        }
        
        .feature-icon i {
            color: white;
            font-size: 18px;
        }
        
        .loading-spinner {
            display: none;
            text-align: center;
            padding: 20px;
        }
        
        .cloud-icon {
            position: relative;
            display: inline-block;
            transition: transform 0.3s ease;
            z-index: 101;
        }
        .cloud-tooltip {
            visibility: hidden;
            width: 140px;
            background-color: #333;
            color: #fff;
            text-align: center;
            border-radius: 6px;
            padding: 8px 5px;
            position: absolute;
            z-index: 1000;
            bottom: 125%;
            left: 50%;
            margin-left: -70px;
            opacity: 0;
            transition: opacity 0.3s;
            font-size: 12px;
            white-space: nowrap;
            pointer-events: none;
        }
        .cloud-tooltip::after {
            content: "";
            position: absolute;
            top: 100%;
            left: 50%;
            margin-left: -5px;
            border-width: 5px;
            border-style: solid;
            border-color: #333 transparent transparent transparent;
        }
        .cloud-icon:hover .cloud-tooltip {
            visibility: visible;
            opacity: 1;
        }

        .btn-rotate {
            background-color: #000;
            border-color: #000;
            color: #fff;
        }
        .btn-rotate .fa-sync-alt {
            color: var(--tool-icon-teal);
        }
        .btn-rotate:hover {
            background-color: #333;
            border-color: #333;
            color: #fff;
        }
        .btn-rotate:hover .fa-sync-alt {
            color: #2ee5c0;
        }
        .select-pdf-icon {
            color: var(--tool-icon-teal);
        }
        .btn-delete-all-trash {
            color: #e03131;
        }
        .btn-outline-dark.btn-delete-all:hover .btn-delete-all-trash {
            color: #ff5c5c;
        }
        
        .upload-buttons-row {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 15px;
            flex-wrap: wrap;
            margin: 10px 0;
        }

        .file-section {
            margin-bottom: 0;
            padding: 0;
            background: transparent;
            border: none;
        }

        .files-bar {
            flex-shrink: 0;
            padding: 8px 12px 12px;
            background: var(--viewer-surface);
            border-bottom: none;
        }
        .files-bar__inner {
            display: flex;
            flex-direction: row;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 6px 10px;
            width: 100%;
            max-width: 100%;
            box-sizing: border-box;
        }
        .files-bar .file-pill {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: #ffffff;
            border: 1px solid #e0e0e0;
            border-radius: 999px;
            padding: 6px 14px 6px 10px;
            box-shadow: 0 1px 4px rgba(0,0,0,0.06);
            min-width: 260px;
        }
        .files-bar .file-pill__select {
            flex: 1;
            border: none;
            background: transparent;
            font-size: 14px;
            outline: none;
            text-align: right;
            direction: rtl;
            min-width: 0;
            cursor: pointer;
        }
        .files-bar .file-pill__delete {
            background: transparent;
            border: none;
            color: #6c757d;
            font-size: 16px;
            cursor: pointer;
            padding: 4px 6px;
            border-radius: 6px;
            transition: color 0.2s, background 0.2s;
        }
        .files-bar .file-pill__delete:hover {
            color: #dc3545;
            background: #f8d7da33;
        }

        .file-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 220px));
            gap: 30px;
            align-items: start;
            justify-content: center;
        }

        .file-grid.single-page-view {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 12px;
            max-width: 220px;
            width: 100%;
            margin: 0 auto;
            justify-content: flex-start;
        }

        .file-grid.single-page-view .pdf-thumbnail-wrapper {
            display: none !important;
            width: 100%;
            max-width: 220px;
            padding: 10px;
            box-sizing: border-box;
        }

        .file-grid.single-page-view .pdf-thumbnail-wrapper.first-page-only {
            display: flex !important;
            flex-direction: column;
            align-items: center;
        }

        .file-grid.single-page-view .pdf-thumbnail {
            width: 100% !important;
            max-width: none !important;
            max-height: none !important;
            min-height: 220px !important;
            aspect-ratio: 8.5 / 11;
        }

        .file-grid.single-page-view .pdf-thumbnail.landscape {
            aspect-ratio: 11 / 8.5;
            min-height: 160px !important;
            max-height: none !important;
        }

        .file-grid.single-page-view .pdf-thumbnail img {
            width: 100% !important;
            height: 100% !important;
            max-width: 100% !important;
            max-height: 100% !important;
            object-fit: contain !important;
            transform: none !important;
        }

        .preview-controls-wrap {
            display: none;
            margin: 0 0 1.25rem;
        }
        .preview-control-card {
            background: #fff;
            border: 1px solid #e3e6ea;
            border-radius: 12px;
            padding: 14px 16px 16px;
            height: 100%;
            box-shadow: 0 2px 12px rgba(0,0,0,0.04);
        }
        .preview-control-card__head {
            font-size: 0.85rem;
            font-weight: 700;
            color: #1a1a1a;
            margin: 0 0 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .preview-control-card__head i {
            color: #444;
            font-size: 1.1rem;
        }
        .preview-control-card__btns {
            display: flex;
            flex-wrap: nowrap;
            gap: 10px;
            align-items: center;
            justify-content: stretch;
            width: 100%;
        }

        .bulk-rotate-btn {
            flex: 1 1 0;
            min-width: 0;
            height: 48px;
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border: 2px solid #cfd6dc;
            background: #f8fafb;
            transition: all 0.2s;
            cursor: pointer;
            padding: 0 10px;
            font-weight: 700;
            color: #333;
            font-size: 15px;
        }
        .bulk-rotate-btn:hover {
            background: #eceff1;
            color: #111;
            border-color: #555;
        }
        .bulk-rotate-btn.active {
            background: #111;
            color: #fff;
            border-color: #111;
        }

        .view-toggle-btn {
            flex: 1 1 0;
            min-width: 0;
            min-height: 48px;
            border-radius: 10px;
            display: inline-flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            border: 2px solid #cfd6dc;
            background: #f8fafb;
            transition: all 0.2s;
            cursor: pointer;
            padding: 6px 10px;
            font-weight: 600;
            color: #444;
            font-size: 11px;
            gap: 4px;
        }
        .view-toggle-btn i {
            font-size: 16px;
        }
        .view-toggle-btn:hover {
            background: #eceff1;
            border-color: #555;
            color: #111;
        }
        .view-toggle-btn.active {
            background: #111;
            color: #fff;
            border-color: #111;
        }
        .view-toggle-btn.active i {
            color: #fff;
        }
        .view-toggle-btn.active .view-toggle-icon span {
            background: #fff;
        }

        .view-toggle-icon {
            display: flex;
            flex-direction: column;
            gap: 3px;
        }

        .view-toggle-icon span {
            width: 16px;
            height: 2px;
            background: currentColor;
        }


        /* إعلانات جانبية */
        .sidebar-ads {
            display: none !important;
            visibility: hidden !important;
        }

        .sidebar-ads.visible {
            display: block !important;
            visibility: visible !important;
            background: #007bff !important;
            padding: 10px !important;
            border-radius: 8px !important;
        }

        .sidebar-left {
            position: fixed;
            left: 20px;
            top: 150px;
            width: auto;
            max-width: 300px;
            z-index: 100;
        }

        .sidebar-right {
            position: fixed;
            right: 20px;
            top: 150px;
            width: auto;
            max-width: 300px;
            z-index: 100;
        }

        #adContainer {
            margin: 20px 0;
            text-align: center;
            overflow: hidden;
            max-width: 100%;
            box-sizing: border-box;
        }
        #adContainer ins.adsbygoogle {
            display: block !important;
            width: min(100%, 728px) !important;
            max-width: 100% !important;
            margin-left: auto !important;
            margin-right: auto !important;
        }
        #adContainer iframe {
            max-width: 100% !important;
            width: 100% !important;
            display: block !important;
            margin-left: auto !important;
            margin-right: auto !important;
        }

        @media (max-width: 768px) {
            .sidebar-left,
            .sidebar-right {
                display: none !important;
            }
            .upload-pick-wrap { transform: none; }
        }

        /* شاشة نتيجة التدوير (مطابقة لنمط الدمج) */
        .merge-result-wrap {
            display: none;
            margin-top: 24px;
        }
        .merge-result-card {
            background: #ffffff;
            border: 1px solid #e8e8e8;
            border-radius: 14px;
            box-shadow: 0 4px 16px rgba(0,0,0,0.08);
            padding: 28px 20px;
            text-align: center;
        }
        .merge-result-actions {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            margin: 8px 0 18px;
        }
        .merge-result-download {
            background: #111111;
            color: #fff;
            border: 0;
            border-radius: 10px;
            padding: 14px 28px;
            font-size: 20px;
            font-weight: 700;
            min-width: 320px;
            transition: transform .15s ease, background .2s ease;
        }
        .merge-result-download:hover { background: #000000; transform: translateY(-1px); }
        .merge-result-next {
            width: 42px;
            height: 42px;
            border-radius: 999px;
            border: 0;
            background: #4f4f4f;
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .merge-quick-actions {
            display: inline-flex;
            flex-direction: row;
            gap: 10px;
            margin-bottom: 14px;
        }
        .quick-action-wrap {
            position: relative;
            display: inline-flex;
        }
        .quick-action-note {
            position: absolute;
            bottom: calc(100% + 8px);
            left: 50%;
            transform: translateX(-50%);
            background: #565666;
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 7px 11px;
            border-radius: 6px;
            white-space: nowrap;
            opacity: 0;
            pointer-events: none;
            transition: opacity .15s ease, transform .15s ease;
            z-index: 5;
        }
        .quick-action-note::after {
            content: '';
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%);
            border: 6px solid transparent;
            border-top-color: #565666;
        }
        .quick-action-wrap:hover .quick-action-note {
            opacity: 1;
            transform: translateX(-50%) translateY(-2px);
        }
        .merge-quick-actions .quick-action-btn {
            width: 54px;
            height: 54px;
            border-radius: 999px;
            border: 2px solid #d8dce2;
            background: #ffffff;
            color: #2c2c2c;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
            transition: transform .15s ease, filter .2s ease;
        }
        .merge-quick-actions .quick-action-btn:hover { transform: translateY(-2px); filter: brightness(0.98); }
        .merge-quick-actions .quick-action-btn i { font-size: 22px; }
        #saveToGoogleBtn i { color: #ea4335; }
        #saveToDropboxBtn i { color: #0b67ff; }
        #deleteMergedBtn { background: #ffffff; border-color: #f0c9c9; }
        #deleteMergedBtn i { color: #e5322d; }
        .merge-result-tools {
            border: 1px solid #ececec;
            border-radius: 12px;
            padding: 16px;
            background: linear-gradient(180deg, #fcfcfc 0%, #f6f6f6 100%);
            margin-bottom: 14px;
        }
        .merge-result-tools h6 { margin: 0 0 10px; font-size: 16px; color: #555; font-weight: 700; }
        .merge-result-tool-links {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px 12px;
        }
        .merge-result-tool-links a {
            text-decoration: none;
            color: #2e2e2e;
            font-size: 14px;
            padding: 8px 10px;
            border-radius: 10px;
            background: #fff;
            border: 1px solid #ececec;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            font-weight: 600;
            transition: all .15s ease;
        }
        .merge-result-tool-links a:hover {
            border-color: #dbdbdb;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(0,0,0,0.06);
        }
        .merge-tool-icon {
            width: 24px;
            height: 24px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #0d6efd;
            font-size: 16px;
            flex: 0 0 24px;
            background: transparent;
        }
        .merge-tool-label { flex: 1 1 auto; text-align: right; }
        @media (max-width: 576px) {
            .merge-result-download { min-width: 100%; font-size: 18px; }
            .merge-result-tool-links { grid-template-columns: 1fr; }
        }