diff --git a/css/style.css b/css/style.css
index 3ede6b8..e2298ff 100644
--- a/css/style.css
+++ b/css/style.css
@@ -89,3 +89,11 @@ body {
   font-weight: bold;
   color: #ffffff;
 }
+
+.error {
+  margin-left: 0.5em;
+  margin-right: 0.5em;
+  font-size: 1em;
+  font-weight: bold;
+  color: #ffffff;
+}