diff --git a/index.html b/index.html
index 9798da7..32442eb 100644
--- a/index.html
+++ b/index.html
@@ -121,6 +121,7 @@
   button,
   input:focus,
   button:focus {
+    display: block;
     box-sizing: border-box;
     width: 100%;
     border: 0;