add internal template styling with pagination

layouts/section/article.html

         {{ .Render "summary" }}
       {{ end }}
     </section>
-
+{{ template "_internal/pagination.html" . }}
   </article>
 {{ end }}

src/css/_hugo-internal-templates.css

+/* pagination.html: https://github.com/spf13/hugo/blob/master/tpl/tplimpl/template_embedded.go#L117 */
+.pagination {
+  margin: 3rem 0;
+}
+
+.pagination li {
+  display: inline-block;
+  margin-right: .375rem;
+  font-size: .875rem;
+  margin-bottom: 2.5em;
+}
+.pagination li a {
+  padding: .5rem .625rem;
+  background-color: white;
+  color: #333;
+  border: 1px solid #ddd;
+  border-radius: 3px;
+  text-decoration: none;
+}
+.pagination li.disabled {
+  display: none;
+}
+.pagination li.active a:link,
+.pagination li.active a:active,
+.pagination li.active a:visited {
+  background-color: #ddd;
+}

src/css/main.css

 @import '_tachyons';
+@import '_hugo-internal-templates';
 @import '_styles';