div>
        </div>
        <div id="right-side">
            <div id="btn-delete">Delete</div>
            <div id="btn-mark-as-unread">Mark as unread</div>
            <div id="btn-mark-as-read">Mark as read</div>
        </div>
    </div>
    <div id="content"></div>
</body>
</html>