fix sticky problems

site/templates/linear.php

@@ -1,4 +1,6 @@
-<?php snippet('header') ?>
+<?php snippet('header', array(
+  'entryTopPos' => 20
+)) ?>
 <main id="<?= $page->template() ?>">
   <article>
     <?php snippet('cover', array('isOpen' => true), slots: true) ?>
@@ -18,7 +20,8 @@
       </p>
       <?php endslot() ?>
     <?php endsnippet() ?>
-    <?php snippet('nav') ?>
-    <?= $page->body() ?>
+    <div class="content">
+      <?= $page->body() ?>
+    </div>
   </article>
 </main>