diff --git a/resources/web/style/base_styles.pcss b/resources/web/style/base_styles.pcss
index 25a72887587d..772c3121a1f9 100644
--- a/resources/web/style/base_styles.pcss
+++ b/resources/web/style/base_styles.pcss
@@ -68,7 +68,7 @@ html {
   }
 
   details[open] {
-    summary {
+    > summary {
       &:before {
         transform: translate(-3.5px, 0px) rotate(90deg);
         transition: .1s ease-in-out;