diff --git a/dev.less b/dev.less
index 17c8a32..a8dbcf8 100644
--- a/dev.less
+++ b/dev.less
@@ -103,8 +103,9 @@ display: block !important;
 }
 
 
-#heatcalc{
-    thead, thead th{
-        will-change: top;
-    }
+
+@media (min-width: 768px) and (min-width: 991) { /* desktop */
+        *{
+                background:#ff0;
+        }
 }