diff --git a/_includes/layouts/base.njk b/_includes/layouts/base.njk
index 84ddca9..7593935 100644
--- a/_includes/layouts/base.njk
+++ b/_includes/layouts/base.njk
@@ -1,7 +1,7 @@
 ---
 layout: layouts/parent.njk
 ---
-<div>
+<div id="core">
   {%- if parent -%}
     <div class="parent">
     {%- for post in collections.all -%}
diff --git a/_includes/layouts/home.njk b/_includes/layouts/home.njk
index 84ddca9..7593935 100644
--- a/_includes/layouts/home.njk
+++ b/_includes/layouts/home.njk
@@ -1,7 +1,7 @@
 ---
 layout: layouts/parent.njk
 ---
-<div>
+<div id="core">
   {%- if parent -%}
     <div class="parent">
     {%- for post in collections.all -%}
diff --git a/public/css/index.css b/public/css/index.css
index aea0512..2e39241 100644
--- a/public/css/index.css
+++ b/public/css/index.css
@@ -158,7 +158,10 @@ main {
   padding-left: 24px;
   padding-right: 24px;
   line-height:1.5rem;
-  flex-grow:1;
+}
+
+#core {
+  flex-grow: 1;
 }
 
 .model,