diff --git a/12/style.css b/12/style.css
index 79aadc3..0a84502 100644
--- a/12/style.css
+++ b/12/style.css
@@ -641,11 +641,9 @@ filter: invert(1);
   z-index: 10;
   background-color: grey;
   color: #fff;
+  z-index:2000;
 }
 
-#shell_03header:hover{
-  z-index:1000;
-}
 
 #audio_05header{
   padding: 10px;
@@ -653,4 +651,5 @@ filter: invert(1);
   z-index: 10;
   background-color: grey;
   color: #fff;
+  z-index:2000;
 }
\ No newline at end of file