Fix #331

Author: Havvy

src/theme/reference.css

@@ -1,10 +1,18 @@
-/* This selector moves things around to make space for the warning on the top
-   of each page. Get rid of it when the warning goes away. */
+/* These selectors moves things around to make space for the warning on the
+   top of each page. Get rid of it when the warning goes away. */
 .page-wrapper > .nav-chapters {
     /* add height for warning content & margin */
     top: 120px;
 }
 
+.sidebar-visible .content {
+    top: 120px;
+}
+
+.nav-chapters {
+    top: 120px;
+}
+
 p.warning {
     background-color: rgb(242, 222, 222);
     border-bottom-color: rgb(238, 211, 215);