
<!-- DEBUG: Starting page count calculation -->
<!-- DEBUG: Processing a-music-journey_7884.pdf -->
<!-- DEBUG: PDFinfo command: pdfinfo '../files/a-music-journey_7884.pdf' 2>/dev/null -->
<!-- DEBUG: PDFinfo output:  -->
<!-- DEBUG: PDFtk command: pdftk '../files/a-music-journey_7884.pdf' dump_data 2>/dev/null -->
<!-- DEBUG: GS command: gs -q -dNODISPLAY -c '(../files/a-music-journey_7884.pdf) (r) file runpdfbegin pdfpagecount = quit' 2>/dev/null -->
<!-- DEBUG: GS output: 10
 -->
<!-- DEBUG: Ghostscript found 10 pages -->
<!-- DEBUG: A Music Journey - Final page count: 10 - Start page: 1 - End page: 10 -->
<!-- DEBUG: Processing relentless-preamplifier_3279.pdf -->
<!-- DEBUG: PDFinfo command: pdfinfo '../files/relentless-preamplifier_3279.pdf' 2>/dev/null -->
<!-- DEBUG: PDFinfo output:  -->
<!-- DEBUG: PDFtk command: pdftk '../files/relentless-preamplifier_3279.pdf' dump_data 2>/dev/null -->
<!-- DEBUG: GS command: gs -q -dNODISPLAY -c '(../files/relentless-preamplifier_3279.pdf) (r) file runpdfbegin pdfpagecount = quit' 2>/dev/null -->
<!-- DEBUG: GS output: 7
 -->
<!-- DEBUG: Ghostscript found 7 pages -->
<!-- DEBUG: Relentless Preamplifier - Final page count: 7 - Start page: 11 - End page: 17 -->
<!-- DEBUG: Processing relentless-epic-1600-monoblock-amplifier_5895.pdf -->
<!-- DEBUG: PDFinfo command: pdfinfo '../files/relentless-epic-1600-monoblock-amplifier_5895.pdf' 2>/dev/null -->
<!-- DEBUG: PDFinfo output:  -->
<!-- DEBUG: PDFtk command: pdftk '../files/relentless-epic-1600-monoblock-amplifier_5895.pdf' dump_data 2>/dev/null -->
<!-- DEBUG: GS command: gs -q -dNODISPLAY -c '(../files/relentless-epic-1600-monoblock-amplifier_5895.pdf) (r) file runpdfbegin pdfpagecount = quit' 2>/dev/null -->
<!-- DEBUG: GS output: 7
 -->
<!-- DEBUG: Ghostscript found 7 pages -->
<!-- DEBUG: Relentless Epic 1600 Monoblock Amplifier - Final page count: 7 - Start page: 18 - End page: 24 -->
<!-- DEBUG: Processing relentless-800-monoblock-amplifier_9280.pdf -->
<!-- DEBUG: PDFinfo command: pdfinfo '../files/relentless-800-monoblock-amplifier_9280.pdf' 2>/dev/null -->
<!-- DEBUG: PDFinfo output:  -->
<!-- DEBUG: PDFtk command: pdftk '../files/relentless-800-monoblock-amplifier_9280.pdf' dump_data 2>/dev/null -->
<!-- DEBUG: GS command: gs -q -dNODISPLAY -c '(../files/relentless-800-monoblock-amplifier_9280.pdf) (r) file runpdfbegin pdfpagecount = quit' 2>/dev/null -->
<!-- DEBUG: GS output: 5
 -->
<!-- DEBUG: Ghostscript found 5 pages -->
<!-- DEBUG: Relentless 800 Monoblock Amplifier - Final page count: 5 - Start page: 25 - End page: 29 -->
<!-- DEBUG: Processing momentum-c2-preamplifier_7604.pdf -->
<!-- DEBUG: PDFinfo command: pdfinfo '../files/momentum-c2-preamplifier_7604.pdf' 2>/dev/null -->
<!-- DEBUG: PDFinfo output:  -->
<!-- DEBUG: PDFtk command: pdftk '../files/momentum-c2-preamplifier_7604.pdf' dump_data 2>/dev/null -->
<!-- DEBUG: GS command: gs -q -dNODISPLAY -c '(../files/momentum-c2-preamplifier_7604.pdf) (r) file runpdfbegin pdfpagecount = quit' 2>/dev/null -->
<!-- DEBUG: GS output: 7
 -->
<!-- DEBUG: Ghostscript found 7 pages -->
<!-- DEBUG: Momentum C2 Preamplifier - Final page count: 7 - Start page: 30 - End page: 36 -->
<!-- DEBUG: Processing momentum-m400-mxv-monoblock-amplifier_5832.pdf -->
<!-- DEBUG: PDFinfo command: pdfinfo '../files/momentum-m400-mxv-monoblock-amplifier_5832.pdf' 2>/dev/null -->
<!-- DEBUG: PDFinfo output:  -->
<!-- DEBUG: PDFtk command: pdftk '../files/momentum-m400-mxv-monoblock-amplifier_5832.pdf' dump_data 2>/dev/null -->
<!-- DEBUG: GS command: gs -q -dNODISPLAY -c '(../files/momentum-m400-mxv-monoblock-amplifier_5832.pdf) (r) file runpdfbegin pdfpagecount = quit' 2>/dev/null -->
<!-- DEBUG: GS output: 5
 -->
<!-- DEBUG: Ghostscript found 5 pages -->
<!-- DEBUG: Momentum M400 MxV Monoblock Amplifier - Final page count: 5 - Start page: 37 - End page: 41 -->
<!-- DEBUG: Processing momentum-s250-mxv-stereo-amplifier_3680.pdf -->
<!-- DEBUG: PDFinfo command: pdfinfo '../files/momentum-s250-mxv-stereo-amplifier_3680.pdf' 2>/dev/null -->
<!-- DEBUG: PDFinfo output:  -->
<!-- DEBUG: PDFtk command: pdftk '../files/momentum-s250-mxv-stereo-amplifier_3680.pdf' dump_data 2>/dev/null -->
<!-- DEBUG: GS command: gs -q -dNODISPLAY -c '(../files/momentum-s250-mxv-stereo-amplifier_3680.pdf) (r) file runpdfbegin pdfpagecount = quit' 2>/dev/null -->
<!-- DEBUG: GS output: 5
 -->
<!-- DEBUG: Ghostscript found 5 pages -->
<!-- DEBUG: Momentum S250 MxV Stereo Amplifier - Final page count: 5 - Start page: 42 - End page: 46 -->
<!-- DEBUG: Processing momentum-mxv-integrated-amplifier_4743.pdf -->
<!-- DEBUG: PDFinfo command: pdfinfo '../files/momentum-mxv-integrated-amplifier_4743.pdf' 2>/dev/null -->
<!-- DEBUG: PDFinfo output:  -->
<!-- DEBUG: PDFtk command: pdftk '../files/momentum-mxv-integrated-amplifier_4743.pdf' dump_data 2>/dev/null -->
<!-- DEBUG: GS command: gs -q -dNODISPLAY -c '(../files/momentum-mxv-integrated-amplifier_4743.pdf) (r) file runpdfbegin pdfpagecount = quit' 2>/dev/null -->
<!-- DEBUG: GS output: 7
 -->
<!-- DEBUG: Ghostscript found 7 pages -->
<!-- DEBUG: Momentum MxV Integrated Amplifier - Final page count: 7 - Start page: 47 - End page: 53 -->
<!-- DEBUG: Processing momentum-phonostage_4790.pdf -->
<!-- DEBUG: PDFinfo command: pdfinfo '../files/momentum-phonostage_4790.pdf' 2>/dev/null -->
<!-- DEBUG: PDFinfo output:  -->
<!-- DEBUG: PDFtk command: pdftk '../files/momentum-phonostage_4790.pdf' dump_data 2>/dev/null -->
<!-- DEBUG: GS command: gs -q -dNODISPLAY -c '(../files/momentum-phonostage_4790.pdf) (r) file runpdfbegin pdfpagecount = quit' 2>/dev/null -->
<!-- DEBUG: GS output: 5
 -->
<!-- DEBUG: Ghostscript found 5 pages -->
<!-- DEBUG: Momentum Phonostage - Final page count: 5 - Start page: 54 - End page: 58 -->
<!-- DEBUG: Processing progression-preamplifier_4036.pdf -->
<!-- DEBUG: PDFinfo command: pdfinfo '../files/progression-preamplifier_4036.pdf' 2>/dev/null -->
<!-- DEBUG: PDFinfo output:  -->
<!-- DEBUG: PDFtk command: pdftk '../files/progression-preamplifier_4036.pdf' dump_data 2>/dev/null -->
<!-- DEBUG: GS command: gs -q -dNODISPLAY -c '(../files/progression-preamplifier_4036.pdf) (r) file runpdfbegin pdfpagecount = quit' 2>/dev/null -->
<!-- DEBUG: GS output: 3
 -->
<!-- DEBUG: Ghostscript found 3 pages -->
<!-- DEBUG: Progression Preamplifier - Final page count: 3 - Start page: 59 - End page: 61 -->
<!-- DEBUG: Processing progression-m550-monoblock-amplifier_2962.pdf -->
<!-- DEBUG: PDFinfo command: pdfinfo '../files/progression-m550-monoblock-amplifier_2962.pdf' 2>/dev/null -->
<!-- DEBUG: PDFinfo output:  -->
<!-- DEBUG: PDFtk command: pdftk '../files/progression-m550-monoblock-amplifier_2962.pdf' dump_data 2>/dev/null -->
<!-- DEBUG: GS command: gs -q -dNODISPLAY -c '(../files/progression-m550-monoblock-amplifier_2962.pdf) (r) file runpdfbegin pdfpagecount = quit' 2>/dev/null -->
<!-- DEBUG: GS output: 3
 -->
<!-- DEBUG: Ghostscript found 3 pages -->
<!-- DEBUG: Progression M550 Monoblock Amplifier - Final page count: 3 - Start page: 62 - End page: 64 -->
<!-- DEBUG: Processing progression-s350-stereo-amplifier_7902.pdf -->
<!-- DEBUG: PDFinfo command: pdfinfo '../files/progression-s350-stereo-amplifier_7902.pdf' 2>/dev/null -->
<!-- DEBUG: PDFinfo output:  -->
<!-- DEBUG: PDFtk command: pdftk '../files/progression-s350-stereo-amplifier_7902.pdf' dump_data 2>/dev/null -->
<!-- DEBUG: GS command: gs -q -dNODISPLAY -c '(../files/progression-s350-stereo-amplifier_7902.pdf) (r) file runpdfbegin pdfpagecount = quit' 2>/dev/null -->
<!-- DEBUG: GS output: 3
 -->
<!-- DEBUG: Ghostscript found 3 pages -->
<!-- DEBUG: Progression S350 Stereo Amplifier - Final page count: 3 - Start page: 65 - End page: 67 -->
<!-- DEBUG: Processing progression-integrated-amplifier_7379.pdf -->
<!-- DEBUG: PDFinfo command: pdfinfo '../files/progression-integrated-amplifier_7379.pdf' 2>/dev/null -->
<!-- DEBUG: PDFinfo output:  -->
<!-- DEBUG: PDFtk command: pdftk '../files/progression-integrated-amplifier_7379.pdf' dump_data 2>/dev/null -->
<!-- DEBUG: GS command: gs -q -dNODISPLAY -c '(../files/progression-integrated-amplifier_7379.pdf) (r) file runpdfbegin pdfpagecount = quit' 2>/dev/null -->
<!-- DEBUG: GS output: 3
 -->
<!-- DEBUG: Ghostscript found 3 pages -->
<!-- DEBUG: Progression Integrated Amplifier - Final page count: 3 - Start page: 68 - End page: 70 -->
<!-- DEBUG: Processing pendulum-integrated-amplifier_6309.pdf -->
<!-- DEBUG: PDFinfo command: pdfinfo '../files/pendulum-integrated-amplifier_6309.pdf' 2>/dev/null -->
<!-- DEBUG: PDFinfo output:  -->
<!-- DEBUG: PDFtk command: pdftk '../files/pendulum-integrated-amplifier_6309.pdf' dump_data 2>/dev/null -->
<!-- DEBUG: GS command: gs -q -dNODISPLAY -c '(../files/pendulum-integrated-amplifier_6309.pdf) (r) file runpdfbegin pdfpagecount = quit' 2>/dev/null -->
<!-- DEBUG: GS output: 7
 -->
<!-- DEBUG: Ghostscript found 7 pages -->
<!-- DEBUG: Pendulum Integrated Amplifier - Final page count: 7 - Start page: 71 - End page: 77 -->
<!-- DEBUG: Final PDF Sections: [{"title":"A Music Journey","startPage":1,"endPage":10,"pageCount":10,"filename":"a-music-journey_7884.pdf"},{"title":"Relentless Preamplifier","startPage":11,"endPage":17,"pageCount":7,"filename":"relentless-preamplifier_3279.pdf"},{"title":"Relentless Epic 1600 Monoblock Amplifier","startPage":18,"endPage":24,"pageCount":7,"filename":"relentless-epic-1600-monoblock-amplifier_5895.pdf"},{"title":"Relentless 800 Monoblock Amplifier","startPage":25,"endPage":29,"pageCount":5,"filename":"relentless-800-monoblock-amplifier_9280.pdf"},{"title":"Momentum C2 Preamplifier","startPage":30,"endPage":36,"pageCount":7,"filename":"momentum-c2-preamplifier_7604.pdf"},{"title":"Momentum M400 MxV Monoblock Amplifier","startPage":37,"endPage":41,"pageCount":5,"filename":"momentum-m400-mxv-monoblock-amplifier_5832.pdf"},{"title":"Momentum S250 MxV Stereo Amplifier","startPage":42,"endPage":46,"pageCount":5,"filename":"momentum-s250-mxv-stereo-amplifier_3680.pdf"},{"title":"Momentum MxV Integrated Amplifier","startPage":47,"endPage":53,"pageCount":7,"filename":"momentum-mxv-integrated-amplifier_4743.pdf"},{"title":"Momentum Phonostage","startPage":54,"endPage":58,"pageCount":5,"filename":"momentum-phonostage_4790.pdf"},{"title":"Progression Preamplifier","startPage":59,"endPage":61,"pageCount":3,"filename":"progression-preamplifier_4036.pdf"},{"title":"Progression M550 Monoblock Amplifier","startPage":62,"endPage":64,"pageCount":3,"filename":"progression-m550-monoblock-amplifier_2962.pdf"},{"title":"Progression S350 Stereo Amplifier","startPage":65,"endPage":67,"pageCount":3,"filename":"progression-s350-stereo-amplifier_7902.pdf"},{"title":"Progression Integrated Amplifier","startPage":68,"endPage":70,"pageCount":3,"filename":"progression-integrated-amplifier_7379.pdf"},{"title":"Pendulum Integrated Amplifier","startPage":71,"endPage":77,"pageCount":7,"filename":"pendulum-integrated-amplifier_6309.pdf"}] -->

<!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta charset="utf-8">
    <title>A Musical Journey -  D'Agostino Flipbook</title>
    <link rel="stylesheet" href="build/css/flipbook.min.css">

    <script src="jquery-3.6.3.js"></script>
    <script src="pdf-lib.min.js"></script>
    <script src="build/js/flipbook.min.js"></script>
    <link rel="icon" href="../assets/img/favicon.png" sizes="32x32">

    <style>
        #loading {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: rgba(0,0,0,0.95);
            color: white;
            padding: 30px;
            border-radius: 15px;
            z-index: 9999;
            text-align: center;
            box-shadow: 0 10px 30px rgba(0,0,0,0.8);
        }

        .loading-title {
            font-size: 18px;
            margin-bottom: 15px;
            font-weight: bold;
            color: #ffffff;
        }

        .current-status {
            font-size: 14px;
            margin-bottom: 10px;
            color: #cccccc;
        }

        .progress-bar {
            width: 300px;
            height: 15px;
            background: #222;
            border-radius: 8px;
            margin: 15px 0;
            overflow: hidden;
            border: 1px solid #444;
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #8f2636D0, #ce272d);
            border-radius: 8px;
            width: 0%;
            transition: width 0.3s ease;
        }

        #container {
            display: none;
            background: #1a1a1a;
        }

        #container.loaded {
            display: block;
        }
        .flipbook-tocHolder{
            background: #8f2736;
        }
        .flipbook-menu-header{
            background: rgba(0, 0, 0, 0.25);
        }
        .error-message {
            background: #8f2636D0;
            color: white;
            padding: 15px;
            border-radius: 5px;
            margin: 20px;
            text-align: center;
            border: 1px solid #8f2636D0;
        }
        .flipbook-menuTop{

        }

        .custom-toc-item {
            padding: 8px 12px;
            margin: 2px 0;
            cursor: pointer;
            border-radius: 4px;
            transition: all 0.3s ease;
            border-left: 3px solid transparent;
        }

        .custom-toc-item:hover {
            background-color: rgba(255, 255, 255, 0.1);
            border-left: 3px solid #8f2636D0;
        }

        .custom-toc-item.active {
            background-color: rgba(175, 76, 76, 0.2);
            border-left: 3px solid #8f2636D0;
        }

        .toc-title {
            font-size: 14px;
            color: #fff;
        }
    </style>
</head>

<body>
<div id="loading">
    <div class="loading-title">Loading Catalog...</div>
    <div class="current-status" id="currentStatus">Please wait...</div>
    <div class="progress-bar">
        <div class="progress-fill" id="progress"></div>
    </div>
</div>

<div id="container"></div>

<script type="text/javascript">
    class ServerMergeFlipBook {
        constructor(container, mergedUrl, pdfSections, pdfData) {
            this.container = container;
            this.mergedUrl = mergedUrl;
            this.pdfSections = pdfSections || [];
            this.pdfData = pdfData;
            this.flipBookInstance = null;

            console.log('ServerMergeFlipBook initialized');
            console.log('Merged URL:', mergedUrl);
            console.log('PDF Sections:', pdfSections);
        }

        async init() {
            try {
                this.showLoading();
                this.updateProgress(20);
                this.updateStatus('Please wait...');

                // Server-merged PDF var mı kontrol et
                const response = await fetch(this.mergedUrl, { method: 'HEAD' });

                console.log('Merge URL check:', this.mergedUrl);
                console.log('Response status:', response.status);
                console.log('Response ok:', response.ok);
                console.log('Content-Length:', response.headers.get('content-length'));

                // Daha sıkı kontrol - sadece gerçekten var olan dosyalar için server merge kullan
                if (response.ok && response.status === 200 && response.headers.get('content-length') > 10000) {
                    console.log('✅ Server-merged PDF found and is valid, using physical file');
                    this.updateProgress(60);
                    this.updateStatus('Loading server-merged PDF...');
                    await this.initFlipBookWithServerPDF();
                } else {
                    console.log('❌ Server-merged PDF not found or invalid, using client-side merge');
                    console.log('Status:', response.status, 'OK:', response.ok, 'Size:', response.headers.get('content-length'));
                    this.updateProgress(30);
                    this.updateStatus('Creating client-side merge...');
                    await this.initFlipBookWithClientMerge();
                }

                this.updateProgress(100);
                this.hideLoading();

                console.log('FlipBook successfully initialized');

            } catch (error) {
                console.error('Initialization error:', error);
                this.showError('Error: ' + error.message);
            }
        }

        async initFlipBookWithServerPDF() {
            console.log('Using server-merged PDF (NO BLOB, NO CLOUDFLARE ISSUE)');

            this.flipBookInstance = jQuery(this.container).flipBook({
                pdfUrl: this.mergedUrl + '?v=' + Date.now(),
                tableOfContent: this.generateServerTOC(),

                viewMode: "webgl",
                singlePageMode: false,
                lightBox: false,
                layout: 2,
                skin: 'dark',
                backgroundColor: '#07090D',

                btnToc: { enabled: true, title: "Contents" },
                btnZoomIn: { enabled: true },
                btnZoomOut: { enabled: true },
                btnThumbs: { enabled: true },
                btnShare: { enabled: true },
                btnDownloadPdf: { enabled: true },
                btnPrint: { enabled: true },

                sideMenuPosition: "left",
                tableOfContentCloseOnClick: false,

                // Server PDF için normal ayarlar
                pageTextureSize: 2000,
                pageTextureSizeSmall: 1000,
                pagesInMemory: 5,
                loadPagesF: 2,
                loadPagesB: 2
            });

            document.querySelector(this.container).classList.add('loaded');
            this.setupEventListeners();
            // SIDEBAR OTOMATİK AÇILMA KALDIRILDI - artık sadece butondan açılır
        }

        async initFlipBookWithClientMerge() {
            console.log('Creating client-side merge as fallback');

            // Client-side merge kodu aynı...
            const mergedPdf = await PDFLib.PDFDocument.create();
            const clientSections = [];
            let currentPageNumber = 1;

            this.updateStatus('Merging PDFs...');

            for (let i = 0; i < this.pdfData.length; i++) {
                const pdfInfo = this.pdfData[i];

                try {
                    this.updateStatus(`Merging: ${pdfInfo.title} (${i + 1}/${this.pdfData.length})`);

                    const response = await fetch(pdfInfo.url + '?v=' + Date.now());
                    if (!response.ok) continue;

                    const pdfBytes = await response.arrayBuffer();
                    const pdf = await PDFLib.PDFDocument.load(pdfBytes);
                    const pageCount = pdf.getPageCount();

                    const pageIndices = pdf.getPageIndices();
                    const pages = await mergedPdf.copyPages(pdf, pageIndices);

                    const startPage = currentPageNumber;
                    pages.forEach(page => mergedPdf.addPage(page));
                    const endPage = currentPageNumber + pageCount - 1;

                    clientSections.push({
                        title: pdfInfo.title,
                        startPage: startPage,
                        endPage: endPage,
                        pageCount: pageCount
                    });

                    console.log(`✅ ${pdfInfo.title}: ${pageCount} pages, starts at page ${startPage}`);

                    currentPageNumber += pageCount;

                    const progress = 30 + ((i + 1) / this.pdfData.length) * 50;
                    this.updateProgress(progress);

                } catch (error) {
                    console.error(`Error processing ${pdfInfo.title}:`, error);
                    continue;
                }
            }

            const mergedPdfBytes = await mergedPdf.save();
            const blob = new Blob([mergedPdfBytes], { type: 'application/pdf' });
            const blobUrl = URL.createObjectURL(blob);

            this.updateStatus('Loading client-merged PDF...');

            this.flipBookInstance = jQuery(this.container).flipBook({
                pdfUrl: blobUrl,
                tableOfContent: this.generateClientTOC(clientSections),

                viewMode: "webgl",
                singlePageMode: false,
                lightBox: false,
                layout: 4,
                skin: 'dark',
                backgroundColor: '#07090D',

                btnToc: { enabled: true, title: "Contents" },
                btnZoomIn: { enabled: true },
                btnZoomOut: { enabled: true },
                btnThumbs: { enabled: true },
                btnShare: { enabled: true },
                btnDownloadPdf: { enabled: true },
                btnPrint: { enabled: true },

                sideMenuPosition: "left",
                tableOfContentCloseOnClick: false,

                pageTextureSize: 1400,
                pageTextureSizeSmall: 700,
                pagesInMemory: 3,
                loadPagesF: 1,
                loadPagesB: 1
            });

            document.querySelector(this.container).classList.add('loaded');
            this.setupEventListeners();
            // SIDEBAR OTOMATİK AÇILMA KALDIRILDI - artık sadece butondan açılır
        }

        // TOC fonksiyonları aynı kalıyor...
        generateServerTOC() {
            if (this.pdfSections.length > 0) {
                console.log('Generating Server TOC with sections:', this.pdfSections);
                return this.pdfSections.map(section => {
                    const targetPage = section.startPage;
                    console.log(`${section.title}: startPage=${section.startPage}, targetPage=${targetPage}`);
                    return {
                        title: section.title,
                        page: targetPage,
                        pageNumberDisplay: section.startPage
                    };
                });
            }

            console.log('Using fallback TOC');
            return this.pdfData.map((pdf, index) => ({
                title: pdf.title,
                page: (index * 10) - 1,
                pageNumberDisplay: (index * 10) - 1
            }));
        }

        generateClientTOC(sections) {
            console.log('Generating Client TOC with sections:', sections);
            return sections.map(section => {
                const targetPage = section.startPage - 1;
                console.log(`${section.title}: startPage=${section.startPage}, targetPage=${targetPage}`);
                return {
                    title: section.title,
                    page: targetPage,
                    pageNumberDisplay: section.startPage
                };
            });
        }

        setupEventListeners() {
            setTimeout(() => {
                try {
                    const tocItems = document.querySelectorAll('.flipbook-toc li');
                    tocItems.forEach((item) => {
                        const tocItem = item.querySelector('.toc-item');
                        if (tocItem) {
                            tocItem.classList.add('custom-toc-item');
                            const title = tocItem.querySelector('.title');
                            if (title) {
                                title.classList.add('toc-title');
                            }
                        }
                    });
                } catch (error) {
                    console.warn('Sidebar customization failed:', error);
                }
            }, 1000);
        }

        showLoading() {
            document.getElementById('loading').style.display = 'block';
        }

        hideLoading() {
            document.getElementById('loading').style.display = 'none';
        }

        showError(message) {
            this.hideLoading();
            const errorDiv = document.createElement('div');
            errorDiv.className = 'error-message';
            errorDiv.innerHTML = message + '<br><button onclick="location.reload()" style="margin-top:10px; padding:8px 15px; background:#8f2636D0; color:white; border:none; border-radius:3px; cursor:pointer;">Retry</button>';
            document.body.appendChild(errorDiv);
        }

        updateProgress(percent) {
            document.getElementById('progress').style.width = Math.min(percent, 100) + '%';
        }

        updateStatus(status) {
            document.getElementById('currentStatus').textContent = status;
        }
    }

    // Data from PHP
    const mergedUrl = 'https://dandagostino.com/files/merged/catalog_a5585dcd9fa7a1c4e4ef392715b9c0f0.pdf';
    const pdfSections = [{"title":"A Music Journey","startPage":1,"endPage":10,"pageCount":10,"filename":"a-music-journey_7884.pdf"},{"title":"Relentless Preamplifier","startPage":11,"endPage":17,"pageCount":7,"filename":"relentless-preamplifier_3279.pdf"},{"title":"Relentless Epic 1600 Monoblock Amplifier","startPage":18,"endPage":24,"pageCount":7,"filename":"relentless-epic-1600-monoblock-amplifier_5895.pdf"},{"title":"Relentless 800 Monoblock Amplifier","startPage":25,"endPage":29,"pageCount":5,"filename":"relentless-800-monoblock-amplifier_9280.pdf"},{"title":"Momentum C2 Preamplifier","startPage":30,"endPage":36,"pageCount":7,"filename":"momentum-c2-preamplifier_7604.pdf"},{"title":"Momentum M400 MxV Monoblock Amplifier","startPage":37,"endPage":41,"pageCount":5,"filename":"momentum-m400-mxv-monoblock-amplifier_5832.pdf"},{"title":"Momentum S250 MxV Stereo Amplifier","startPage":42,"endPage":46,"pageCount":5,"filename":"momentum-s250-mxv-stereo-amplifier_3680.pdf"},{"title":"Momentum MxV Integrated Amplifier","startPage":47,"endPage":53,"pageCount":7,"filename":"momentum-mxv-integrated-amplifier_4743.pdf"},{"title":"Momentum Phonostage","startPage":54,"endPage":58,"pageCount":5,"filename":"momentum-phonostage_4790.pdf"},{"title":"Progression Preamplifier","startPage":59,"endPage":61,"pageCount":3,"filename":"progression-preamplifier_4036.pdf"},{"title":"Progression M550 Monoblock Amplifier","startPage":62,"endPage":64,"pageCount":3,"filename":"progression-m550-monoblock-amplifier_2962.pdf"},{"title":"Progression S350 Stereo Amplifier","startPage":65,"endPage":67,"pageCount":3,"filename":"progression-s350-stereo-amplifier_7902.pdf"},{"title":"Progression Integrated Amplifier","startPage":68,"endPage":70,"pageCount":3,"filename":"progression-integrated-amplifier_7379.pdf"},{"title":"Pendulum Integrated Amplifier","startPage":71,"endPage":77,"pageCount":7,"filename":"pendulum-integrated-amplifier_6309.pdf"}];
    const pdfData = [{"title":"A Music Journey","url":"https://dandagostino.com/files/a-music-journey_7884.pdf?v=26","filename":"a-music-journey_7884.pdf"},{"title":"Relentless Preamplifier","url":"https://dandagostino.com/files/relentless-preamplifier_3279.pdf?v=26","filename":"relentless-preamplifier_3279.pdf"},{"title":"Relentless Epic 1600 Monoblock Amplifier","url":"https://dandagostino.com/files/relentless-epic-1600-monoblock-amplifier_5895.pdf?v=26","filename":"relentless-epic-1600-monoblock-amplifier_5895.pdf"},{"title":"Relentless 800 Monoblock Amplifier","url":"https://dandagostino.com/files/relentless-800-monoblock-amplifier_9280.pdf?v=26","filename":"relentless-800-monoblock-amplifier_9280.pdf"},{"title":"Momentum C2 Preamplifier","url":"https://dandagostino.com/files/momentum-c2-preamplifier_7604.pdf?v=26","filename":"momentum-c2-preamplifier_7604.pdf"},{"title":"Momentum M400 MxV Monoblock Amplifier","url":"https://dandagostino.com/files/momentum-m400-mxv-monoblock-amplifier_5832.pdf?v=26","filename":"momentum-m400-mxv-monoblock-amplifier_5832.pdf"},{"title":"Momentum S250 MxV Stereo Amplifier","url":"https://dandagostino.com/files/momentum-s250-mxv-stereo-amplifier_3680.pdf?v=26","filename":"momentum-s250-mxv-stereo-amplifier_3680.pdf"},{"title":"Momentum MxV Integrated Amplifier","url":"https://dandagostino.com/files/momentum-mxv-integrated-amplifier_4743.pdf?v=26","filename":"momentum-mxv-integrated-amplifier_4743.pdf"},{"title":"Momentum Phonostage","url":"https://dandagostino.com/files/momentum-phonostage_4790.pdf?v=26","filename":"momentum-phonostage_4790.pdf"},{"title":"Progression Preamplifier","url":"https://dandagostino.com/files/progression-preamplifier_4036.pdf?v=26","filename":"progression-preamplifier_4036.pdf"},{"title":"Progression M550 Monoblock Amplifier","url":"https://dandagostino.com/files/progression-m550-monoblock-amplifier_2962.pdf?v=26","filename":"progression-m550-monoblock-amplifier_2962.pdf"},{"title":"Progression S350 Stereo Amplifier","url":"https://dandagostino.com/files/progression-s350-stereo-amplifier_7902.pdf?v=26","filename":"progression-s350-stereo-amplifier_7902.pdf"},{"title":"Progression Integrated Amplifier","url":"https://dandagostino.com/files/progression-integrated-amplifier_7379.pdf?v=26","filename":"progression-integrated-amplifier_7379.pdf"},{"title":"Pendulum Integrated Amplifier","url":"https://dandagostino.com/files/pendulum-integrated-amplifier_6309.pdf?v=26","filename":"pendulum-integrated-amplifier_6309.pdf"}];

    jQuery(document).ready(function() {
        console.log('Starting Server Merge FlipBook...');
        console.log('Merged URL:', mergedUrl);
        console.log('PDF Sections from server:', pdfSections);
        console.log('PDF Data:', pdfData);

        const serverFlipBook = new ServerMergeFlipBook('#container', mergedUrl, pdfSections, pdfData);
        serverFlipBook.init();

        window.pdfFlipBook = serverFlipBook;

        console.log('Sidebar auto-open disabled - users must click the button to open TOC');
    });
</script>

</body>
</html>