diff --git a/src/design-system/layout/Sidebar/Sidebar.module.css b/src/design-system/layout/Sidebar/Sidebar.module.css
index 46a7c60..bccb525 100644
--- a/src/design-system/layout/Sidebar/Sidebar.module.css
+++ b/src/design-system/layout/Sidebar/Sidebar.module.css
@@ -197,8 +197,9 @@
 /* ── SidebarTree styles ──────────────────────────────────────────────────── */
 
 .treeSection {
-  padding: 0 6px;
-  margin-bottom: 4px;
+  padding: 0 6px 6px;
+  margin-bottom: 2px;
+  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
 }
 
 .treeSectionLabel {