Change order for accessibility and fix positioning of single post

assets/css/custom.css

@@ -31,6 +31,7 @@ body {
 
 body > main {
   grid-area: main;
+  height: 100%;
 }
 
 #sidebar {

src/gloss/rendering/templates/base.gleam

@@ -67,11 +67,11 @@ fn view(
           ]),
         ]),
       ]),
+      main([], [inner]),
       section([id("sidebar")], [
         nav([id("tags")], [pre_rendered.tags]),
         nav([id("archives")], [pre_rendered.archives]),
       ]),
-      main([], [inner]),
       footer([], [
         p([], [text(config.rendering.copyright)]),
         p([], [