themes/neff/src/scss/_header.scss

@@ -147,10 +147,7 @@
             display: none;
         }
 
-        input[type=checkbox]:checked ~ .navbar-container nav {
-            height: 255px; //TODO: make dynamic in Webkit
-
-            ul {
+        input[type=checkbox]:checked ~ .navbar-container nav ul {
             @include menu-list(column);
 
             li {
@@ -168,7 +165,6 @@
                 }
             }
         }
-        }
 
         .navbar-container {
             margin-top: auto;