diff --git a/style.css b/style.css
index 243ccf8..1ef1c78 100644
--- a/style.css
+++ b/style.css
@@ -119,9 +119,10 @@ html {
     display: inline-block;
     white-space: pre-wrap;
     width: 1em;
+    line-height: 1em;
     border: thin solid gray;
-    border-radius: 0.5em;
-    font-size: 0.3em;
+    border-radius: 0.7em;
+    font-size: 0.5em;
     vertical-align: middle;
     margin-left: 1em;
 }