Revert "Swap heading and body styles"

This reverts commit f755293986.

templates/layout.html

@@ -64,17 +64,17 @@
       }
 
       .post__heading {
-        font-size: 12px;
-        font-style: italic;
-      }
-
-      .post__body {
         background: white;
         border: 1px solid #383e37;
         margin: 1em 0;
         padding: 0.25em;
       }
 
+      .post__heading {
+        font-size: 12px;
+        font-style: italic;
+      }
+
       .post__heading::before {
         content: ':: ';
         font-style: normal;