diff --git a/Bootstrap_new/css/theme-modern.css b/Bootstrap_new/css/theme-modern.css
index c3de6040..b2388c5c 100644
--- a/Bootstrap_new/css/theme-modern.css
+++ b/Bootstrap_new/css/theme-modern.css
@@ -379,11 +379,12 @@ h1, h2, h3, h4, h5, h6, .fw-bold, .fw-semibold {
   padding-left: 14px;
 }
 
-/* Sous-menu actif : fond blanc translucide + bordure blanche */
+/* Sous-menu actif : Barre verticale discrète */
 .sidebar-nav .nav-content li a.active-submenu {
-  color: #ffffff;
-  background: rgba(255,255,255,0.12);
+  color: #FFFFFF;
+  background: rgba(255, 255, 255, 0.1);
   font-weight: 600;
+  position: relative;
   padding-left: 10px;
   width: 100% !important;
 }