Add post component

assets/sass/app.sass

@@ -9,6 +9,7 @@
 @import 'components/listing'
 @import 'components/markup'
 @import 'components/note'
+@import 'components/post'
 @import 'components/slides'
 @import 'components/table'
 @import 'components/talk/video'

assets/sass/components/markup.sass

@@ -1,8 +1,5 @@
 .markup
-  @apply leading-normal -mb-6
-
-  > *
-    @apply mb-6
+  @apply leading-normal
 
   h2,
   h3

assets/sass/components/post.sass

@@ -0,0 +1,5 @@
+.post
+  @apply -mb-6
+
+  > *
+    @apply mb-6

source/_layouts/post.html.twig

@@ -15,7 +15,7 @@
     {% include 'post/header' %}
     {% include 'post/intro-image' %}
 
-    <div class="markup mb-6">
+    <div class="markup post mb-6">
         {% include 'post/old-post-message' %}
         {% block content %}{% endblock %}
     </div>