      <!-- Why use our tool -->
            <div class="content-block">
                <h3>Why use our Compare PDFs tool?</h3>
                <ul>
                    <li><strong>Visual Differences:</strong> See pages side-by-side with clear diff overlays to spot changes quickly.</li>
                    <li><strong>100% Private:</strong> Runs entirely in your browser. Files never leave your device.</li>
                    <li><strong>Open Source & Free:</strong> No registration, ads, or limits.</li>
   