Frontend shortcode polish: spacing, card sizing, newsletter styles

modules/pages/views/site/show.php

@@ -4,7 +4,7 @@ $contentHtml = $content_html ?? '';
 ob_start();
 ?>
 <section class="card">
-  <div style="margin-top:14px; color:var(--muted); line-height:1.8;">
+  <div class="page-content" style="margin-top:14px; color:var(--muted); line-height:1.8;">
     <?= $contentHtml ?>
   </div>
 </section>