diff --git a/css/theme.css b/css/theme.css
index 6c219d8..e50a62b 100644
--- a/css/theme.css
+++ b/css/theme.css
@@ -23,7 +23,7 @@ body {
 
 h1 { margin: 3em 0; }
 
-.hidden { display: hidden; }
+.hidden { visibility: hidden; }
 
 #header {
 	/* Ref https://app.haikei.app/ */