diff --git a/app/assets/stylesheets/common/responsive.scss b/app/assets/stylesheets/common/responsive.scss
index ea752424a..966582676 100644
--- a/app/assets/stylesheets/common/responsive.scss
+++ b/app/assets/stylesheets/common/responsive.scss
@@ -13,8 +13,21 @@
     display: none;
   }
 
-  aside {
-    font-size: 18pt;
+  div#page {
+    > div /* div#c-$controller */ {
+      > div /* div#a-$action */ {
+        display: flex;
+        flex-direction: column;
+
+        /* Move #sidebar below #content. */
+        > aside#sidebar {
+          font-size: 1.5em;
+          float: none;
+          width: auto;
+          order: 2;
+        }
+      }
+    }
   }
 
   #maintoggle {
@@ -109,13 +122,6 @@
     }
   }
 
-  section#responsive-tag-list {
-    display: block;
-    h1 {
-      font-size: 1em;
-    }
-  }
-
   div#page {
     div.comments-for-post div.list-of-comments article.comment div.content {
       clear: both;
@@ -166,10 +172,6 @@
 }
 
 @media screen and (max-width: 440px) {
-  #responsive-tag-list {
-    display: block;
-  }
-
   input#expand-search {
     display: none;
   }
diff --git a/app/assets/stylesheets/specific/posts.scss b/app/assets/stylesheets/specific/posts.scss
index bfa229cad..667d5edd1 100644
--- a/app/assets/stylesheets/specific/posts.scss
+++ b/app/assets/stylesheets/specific/posts.scss
@@ -299,12 +299,6 @@ div#c-posts {
     font-size: $h4_size;
   }
 
-  aside#sidebar > section#pool-sidebar {
-    span.ui-icon {
-      color: #666;
-    }
-  }
-
   aside#sidebar > section > ul {
     margin-bottom: 1em;
   }