diff --git a/_includes/components/nav.html b/_includes/components/nav_custom.html
similarity index 97%
rename from _includes/components/nav.html
rename to _includes/components/nav_custom.html
index fa3f4c8..439f5b4 100644
--- a/_includes/components/nav.html
+++ b/_includes/components/nav_custom.html
@@ -1,5 +1,5 @@
 {%- comment -%}
-  Include as: {%- include_cached nav.html pages=pages -%}
+  Include as: {%- include_cached nav_custom.html pages=pages -%}
   Depends on: include.pages.
   Results in: HTML for the navigation panel.
   Includes:
diff --git a/_includes/components/sidebar_custom.html b/_includes/components/sidebar_custom.html
index 359b474..50e6e57 100644
--- a/_includes/components/sidebar_custom.html
+++ b/_includes/components/sidebar_custom.html
@@ -3,7 +3,7 @@
   Depends on: page(?), site.
   Results in: HTML for the side bar.
   Includes:
-    title.html, nav.html, nav_footer_custom.html
+    title.html, nav_custom.html, nav_footer_custom.html
   Overwrites: 
     pages_top_size, collections_size, collection_entry,
     collection_key, collection_value, collection, nav_footer_custom.
@@ -24,7 +24,7 @@
           | where_exp:"item", "item.nav_exclude != true"
           | size %}
     {% if pages_top_size > 0 %}
-      {% include_cached nav.html pages=site.html_pages %}
+      {% include_cached nav_custom.html pages=site.html_pages %}
     {% endif %}
     {%- if site.nav_external_links -%}
       <ul class="nav-list">
@@ -55,15 +55,15 @@
                   </button>
                   {%- endif -%}
                   <div class="nav-category">{{ collection_value.name }}</div>
-                  {% include_cached nav.html pages=collection %}
+                  {% include_cached nav_custom.html pages=collection %}
                 </li>
               </ul>
             {% else %}
               <div class="nav-category">{{ collection_value.name }}</div>
-              {% include_cached nav.html pages=collection %}
+              {% include_cached nav_custom.html pages=collection %}
             {% endif %}
           {% else %}
-            {% include_cached nav.html pages=collection %}
+            {% include_cached nav_custom.html pages=collection %}
           {% endif %}
         {% endif %}
       {% endfor %}
diff --git a/_includes/head.html b/_includes/head.html
index 26c595e..06b736b 100644
--- a/_includes/head.html
+++ b/_includes/head.html
@@ -4,7 +4,7 @@
 site.search_enabled, site.static_files, site.favicon_ico.
 Results in: HTML for the head element.
 Includes:
-head_nav.html, head_custom.html.
+css/activation.scss.liquid, head_custom.html.
 Overwrites:
 ga_tracking_ids, ga_property, file, favicon.
 Should not be cached, because included files depend on page.
@@ -16,7 +16,11 @@
 
   <link rel="stylesheet" href="{{ '/assets/css/just-the-docs-default.css' | relative_url }}">
 
-  {% include head_nav.html %}
+  <link rel="stylesheet" href="{{ '/assets/css/just-the-docs-head-nav.css' | relative_url }}" id="jtd-head-nav-stylesheet">
+
+  <style id="jtd-nav-activation">
+  {% include css/activation.scss.liquid %}
+  </style>
 
   {% if site.ga_tracking != nil %}
   {% assign ga_tracking_ids = site.ga_tracking | split: "," %}