Fix navigation (pager) links in posts

_includes/tag-link.html

@@ -6,5 +6,6 @@
                     <a href="{{tag | prepend: '/blog/tag/' | prepend: site.baseurl}}" class="tag-label">{{tag}}</a>
 {%     endfor %}
                 </p>
+                <br class="clearfix">
             </footer>
 {% endif %}

_layouts/post.html

@@ -9,10 +9,10 @@ render_post: true
 <nav>
     <ul class="pager">
 {% if page.previous %}
-        <li><a href="{{page.previous.url | prepend: site.baseurl}}">&larr; {{page.previous.title}}</a></li>
+        <li class="previous"><a href="{{page.previous.url | prepend: site.baseurl}}">&larr; {{page.previous.title}}</a></li>
 {% endif %}
 {% if page.next %}
-        <li><a href="{{page.next.url | prepend: site.baseurl}}">{{page.next.title}} &rarr;</a></li>
+        <li class="next"><a href="{{page.next.url | prepend: site.baseurl}}">{{page.next.title}} &rarr;</a></li>
 {% endif %}
     </ul>
 </nav>