diff --git a/extensions/theme-2026/themes/styles.css b/extensions/theme-2026/themes/styles.css
index 308e8ac5e82..acd6523ee7b 100644
--- a/extensions/theme-2026/themes/styles.css
+++ b/extensions/theme-2026/themes/styles.css
@@ -37,11 +37,14 @@
 
 /* Activity Bar */
 .monaco-workbench .part.activitybar {
-	box-shadow: var(--shadow-md);
 	z-index: 50;
 	position: relative;
 }
 
+.monaco-workbench.nosidebar .part.activitybar {
+	box-shadow: var(--shadow-md);
+}
+
 .monaco-workbench.activitybar-right .part.activitybar {
 	box-shadow: var(--shadow-md);
 }