diff --git a/src/css/sumo.scss b/src/css/sumo.scss
index 5603446f5f..3551e89a56 100644
--- a/src/css/sumo.scss
+++ b/src/css/sumo.scss
@@ -449,8 +449,7 @@ html[data-theme='light'] {
     background: var(--ifm-menu-link-sublist-icon) 50% / 2rem 2rem;
     filter: var(--ifm-menu-link-sublist-icon-filter);
     height: 1.25rem;
-    transform: rotate(
-180deg);
+    // Default chevron is already right/left — no extra rotation needed (was: transform: rotate(180deg);)
     width: 1.25rem;
     transition: transform var(--ifm-transition-fast) linear;
 }