Some layout fixes.

layouts/index.html

@@ -1,7 +1,7 @@
 {{ define "main" }}
   <article class="{{ $.Param "index_article_class"  | default "cf ph3 ph5-l pv3 pv4-l f4 tc-l center measure-wide lh-copy mid-gray"}}{{ with getenv "HUGO_ENV" }} {{ . }}{{ end }}">
     {{ .Content }}
-  </article>
+
   {{/* Define a section to pull recent posts from. For Hugo 0.20 this will default to the section with the most number of pages. */}}
   {{ $mainSections := .Site.Params.mainSections | default (slice "post") }}
   {{/* Create a variable with that section to use in multiple places. */}}
@@ -61,4 +61,6 @@
         </div>
       {{ end }}
   {{ end }}
+
+  </article>
 {{ end }}

layouts/partials/page-header.html

@@ -5,7 +5,7 @@
   <header class="{{ .Site.Params.post_header_class | default "cover bg-top" }}" style="background-image: url('{{ $featured_image }}');">
     <div class="{{ .Site.Params.post_header_div_class | default "pb3-m pb6-l bg-black-60" }}">
       {{ partial "site-navigation.html" . }}
-      <div class="tc-l pv6 ph3 ph4-ns">
+      <div class="tc-l pv6-l ph3 ph4-ns">
         {{ if .Site.Params.post_header_show_title }}
         <h1 class="f2 f1-l fw2 white-90 mb0 lh-title">{{ .Title | default .Site.Title }}</h1>
           {{ with .Params.description  }}