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ocr_viewer
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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>OCR Document Viewer</title>
  <link rel="stylesheet" href="style.css">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/openseadragon/4.1.1/openseadragon.min.js"></script>
  <script src="openseadragon-svg-overlay.js"></script>
</head>
<body>
  <!-- Upload screen -->
  <div id="upload-screen">
    <div class="upload-card">
      <h1 class="upload-title">OCR Document Viewer</h1>
      <div class="upload-fields">
        <label class="upload-label">
          <span class="upload-field-title">Document</span>
          <span class="upload-field-hint">PDF or image (PNG, JPG, TIFF)</span>
          <div class="file-drop" id="doc-drop">
            <span id="doc-name">Choose file…</span>
            <input type="file" id="doc-input" accept=".pdf,.png,.jpg,.jpeg,.tif,.tiff">
          </div>
        </label>
        <label class="upload-label">
          <span class="upload-field-title">OCR JSON</span>
          <span class="upload-field-hint">OCR API output</span>
          <div class="file-drop" id="json-drop">
            <span id="json-name">Choose file…</span>
            <input type="file" id="json-input" accept=".json">
          </div>
        </label>
      </div>
      <button id="load-btn" disabled>Load</button>
      <div id="upload-error" class="upload-error"></div>
    </div>
  </div>

  <!-- Viewer (hidden until files are loaded) -->
  <div class="layout" id="viewer-layout" style="display:none">
    <div class="image-panel">
      <div id="osd-viewer"></div>
      <div id="loading-overlay">
        <div class="loading-text">Loading document…</div>
      </div>
    </div>
    <div class="text-panel">
      <div class="panel-header">
        <span>OCR Blocks</span>
        <button id="new-file-btn" title="Load new files">↩ New files</button>
      </div>
      <div id="block-list"></div>
    </div>
  </div>
  <script src="app.js" type="module"></script>
</body>
</html>