diff --git a/part13/ElmHubCss.elm b/part13/ElmHubCss.elm
index 0bd0879..ad5ded6 100644
--- a/part13/ElmHubCss.elm
+++ b/part13/ElmHubCss.elm
@@ -15,13 +15,16 @@ css =
           --
           -- .hide-result {
           --   background-color: transparent;
-          --   border: 0;
           --   font-weight: bold;
           --   font-size: 18px;
           --   margin-left: 18px;
+          --   border: 0px;
           --   cursor: pointer;
           -- }
           --
+          --
+          -- HINT: we use hover later on in the stylesheet...
+          --
           -- .hide-result:hover {
           --   color: rgb(96, 181, 204);
           -- }