Fix styling for the index content

layouts/_default/list.html

@@ -1,7 +1,7 @@
 {{ define "main" }}
 {{ with .Content }}
   <div class="index-content">
-    {{ . | markdownify }}
+    {{ . }}
   </div>
 {{ end }}
 <div class="posts">

source/css/main.css

@@ -257,6 +257,7 @@ ol ol {
 
 .content {
   display: flex;
+  flex-direction: column;
 
   @media print {
     display: initial;