diff --git a/style.css b/style.css
index 26ac2c6..5de0780 100644
--- a/style.css
+++ b/style.css
@@ -667,7 +667,7 @@ ul.tree-view details > summary:before {
   border: 1px solid #808080;
   width: 8px;
   height: 9px;
-  line-height: 9px;
+  line-height: 8px;
   margin-right: 5px;
   padding-left: 1px;
   background-color: #fff;