Change main header to be an H1 so that article TOC flows better (not that it's working 100% as desired yet, though!).

layouts/posts/single.html

@@ -12,7 +12,7 @@
         </div>
 
         <article>
-            <h2 class="post-title"><a href="{{ .Permalink }}">{{ .Title | markdownify }}</a></h2>
+            <h1 class="post-title"><a href="{{ .Permalink }}">{{ .Title | markdownify }}</a></h1>
             {{ if .Params.subtitle }}
             <strong>{{ .Params.subtitle | markdownify }}</strong>
             {{ end }}