Fix margins disposition and size of single and home page

layouts/_default/single.html

@@ -7,7 +7,7 @@
 
     {{ partial "nav-bar.html" . }}
 
-    <main class="content side-text-padding">
+    <main class="content side-text-padding side-gutter">
       <article class="post {{ if ne .Params.dropcap false }}dropcase{{ end }}">
         <header class="post-header">
           <h1 class="post-title">{{ .Title }}</h1>
@@ -29,13 +29,16 @@
         {{- end }}
         {{ .Content }}
       </article>
+      <nav class="end-nav card-container card">
+        {{ with .PrevInSection }}
+        {{ .Render "li-next" }}
+        {{ end }}
+      </nav>
+
+      {{ partial "footer.html" . }}
+
     </main>
-    <nav class="end-nav card-container card">
-      {{ with .PrevInSection }}
-      {{ .Render "li-next" }}
-      {{ end }}
-    </nav>
-    {{ partial "footer.html" . }}
+    
     {{ partial "scripts.html" . }}
   </body>
 </html>