diff --git a/css/style.css b/css/style.css
index 0bd0cef..34a4a4d 100644
--- a/css/style.css
+++ b/css/style.css
@@ -80,4 +80,8 @@ nav {
 
 img.clickable {
 	cursor: pointer;
+}
+
+.hidden {
+	visibility: hidden;	
 }
\ No newline at end of file