diff --git a/assets/style.css b/assets/style.css
index cb36a2d..d884508 100644
--- a/assets/style.css
+++ b/assets/style.css
@@ -164,6 +164,7 @@ ul.navpage_list {
     display: flex !important;
     max-height: 200px;
     width: inherit;
+    transition: max-height .3s ease, border .325s ease !important;
     box-sizing: border-box;
 }