diff --git a/heatcalc/heatcalc.css b/heatcalc/heatcalc.css
index 89f2ccf..56b2f6c 100644
--- a/heatcalc/heatcalc.css
+++ b/heatcalc/heatcalc.css
@@ -47,11 +47,13 @@ td.hover, tr.hover td{
 #button_container{
   position: absolute;
   z-index: 250;
+  width: 100%
 }
 #button_container button{
   font-size: 50px;
   background-color: rgba(153, 0, 0, 0.75);
   color:#fff;
+  z-index: 250;
 }
 #button_container button#left{
   left: 8%;