Index: src/wp-content/themes/twentytwentyone/style.css
===================================================================
--- src/wp-content/themes/twentytwentyone/style.css	(revision 49909)
+++ src/wp-content/themes/twentytwentyone/style.css	(working copy)
@@ -4875,7 +4875,7 @@
 		width: inherit;
 	}
 
-	.primary-navigation > div > .menu-wrapper li:last-child() {
+	.primary-navigation > div > .menu-wrapper li:last-child {
 		margin-right: 0;
 	}
 }
@@ -5098,7 +5098,7 @@
 }
 @media only screen and (max-width: 481px) {
 
-	.primary-navigation .sub-menu .menu-item:last-child() {
+	.primary-navigation .sub-menu .menu-item:last-child {
 		margin-bottom: 0;
 	}
 }