diff --git a/README.md b/README.md
index 2fbe11a9..2c4bacc4 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 ## Binary Tree
 
 <a href="https://binarytree.dev/" target="_blank">
-  <img src="https://github.com/lifeparticle/binarytree/assets/1612112/6f63be18-2c59-4713-91a4-260c3a4e12fe" alt="binary tree logo" height="200" align="right"/>
+  <img src="https://github.com/lifeparticle/lifeparticle/blob/master/gh_social.png" alt="binary tree logo" height="130" align="right"/>
 </a>
 
 <kbd> <br> [binarytree.dev](https://binarytree.dev) <br> </kbd> offers a range of developer productivity tools to save time.
diff --git a/ui/src/index.css b/ui/src/index.css
index faebca89..9631767d 100644
--- a/ui/src/index.css
+++ b/ui/src/index.css
@@ -114,3 +114,15 @@ h5 {
 	/* can we do better? */
 	border-radius: 0 0 0 0 !important;
 }
+
+/* collapmenu align center */
+:where(.css-dev-only-do-not-override-1jglot0).ant-menu-submenu-popup
+	.ant-menu-vertical
+	> .ant-menu-item,
+:where(.css-dev-only-do-not-override-1jglot0).ant-menu-submenu-popup
+	.ant-menu-vertical
+	> .ant-menu-submenu
+	> .ant-menu-submenu-title {
+	display: flex;
+	align-items: center;
+}