Fix head-wrap position

_layouts/post-index.html

@@ -16,7 +16,7 @@
 <div class="image-wrap">
   <div class="headline-wrap">
     <h1>{{ page.title }}</h1>
-    {% if page.tagline %}<h2>{{ page.tagline }}</h2>{% endif %}
+    {% if page.tagline %}<h2 class="hidden-phone">{{ page.tagline }}</h2>{% endif %}
   </div><!--/ .headline-wrap -->
   <img src="{{ site.url }}/images/{{ page.image.feature }}" alt="{{ page.title }} feature image">
 </div><!-- /.image-wrap -->