fix: add min margin for main

layouts/_default/baseof.html

@@ -35,7 +35,7 @@
     <div id="back-to-top"></div>
     <div id="mask"></div>
     {{- partial "header.html" . -}}
-    <main>
+    <main class="tw-mx-4">
         {{- block "content" . }}{{ end -}}
     </main>
     {{- partial "footer.html" . -}}