diff --git a/Bootstrap_new/css/style_office.css b/Bootstrap_new/css/style_office.css
index 482fcaa..88fd078 100644
--- a/Bootstrap_new/css/style_office.css
+++ b/Bootstrap_new/css/style_office.css
@@ -253,7 +253,7 @@ body {
     margin-left: var(--sidebar-width);
 }
 
-.header .toggle-sidebar-btn {
+.toggle-sidebar-btn {
   font-size: 32px;
   padding-left: 10px;
   cursor: pointer;