Постраничная навигация пропали стили

При нажатии на кнопку пропадают стили

 <div class="pagination-container margin-top-20">
    <nav class="pagination">
    <ul>
    
    <?
    if ($page != 1) $pervpage = '<a href="listings-list-with-sidebar.php?page=-1"><<</a>
    <a href="listings-list-with-sidebar.php?page='. ($page - 1).'"><</a> ';
    
    if ($page != $total) $nextpage = '  <a href="listings-list-with-sidebar.php?page='. ($page + 1).'">></a>
    <a href="listings-list-with-sidebar.php?page='.$total.'">>></a> ';
    
    if($page - 1 > 0) $page1left = '<a href="listings-list-with-sidebar.php?page='. ($page - 1) .'">'. ($page - 1) .'</a>  ';
    
    if($page + 1 <= $total) $page1right = '  <a href="listings-list-with-sidebar.php?page='. ($page + 1).'">'. ($page + 1) .'</a>';
    ?>
    
    <li><a href='listings-list-with-sidebar.php?page=' class='current-page' <? echo ".$pervpage.$page1left.$page.$page1right.$nextpage"; ?></a></li>