diff --git a/css/customize-posts.css b/css/customize-posts.css
index 4c7878f..bc8bce6 100644
--- a/css/customize-posts.css
+++ b/css/customize-posts.css
@@ -99,4 +99,14 @@ body.mce-fullscreen.customize-posts-content-editor-pane-open div.mce-fullscreen
 	body.customize-posts-content-editor-pane-open #customize-theme-controls [id^=accordion-panel-posts] ul.accordion-section-content {
 		padding-bottom: 300px;
 	}
+}
+
+.customize-posts-content-editor-pane-open .wp-full-overlay.collapsed .wp-full-overlay-sidebar {
+	z-index: 30;
+}
+.customize-posts-content-editor-pane-open .wp-full-overlay.collapsed .collapse-sidebar {
+	bottom: 308px;
+}
+.customize-posts-content-editor-pane-open.mce-fullscreen .wp-full-overlay.collapsed .collapse-sidebar {
+	bottom: 8px;
 }
\ No newline at end of file