diff --git a/view/style.css b/view/style.css
index c0119dc..5a72a8c 100644
--- a/view/style.css
+++ b/view/style.css
@@ -203,6 +203,7 @@ html {
     position: relative;
     cursor: pointer;
     font-size: 2rem;
+    user-select: none;
 }
 
 .lifeTrajectory {