diff --git a/static/style.css b/static/style.css
index 0ed2966..5a07972 100644
--- a/static/style.css
+++ b/static/style.css
@@ -165,7 +165,9 @@ html {
 
   button {
     border-radius: 0px;
-    width: 18%;
+    width: fill-available;
+    width: -webkit-fill-available;
+    width: -moz-available;
     height: 70px;
     font-size: 130%
   }
\ No newline at end of file