diff --git a/ui.R b/ui.R
index 3c124b5..ae19823 100644
--- a/ui.R
+++ b/ui.R
@@ -72,6 +72,23 @@ ui <- function() {
             border-radius: 0 12px 12px 0;
             box-shadow: 0 4px 8px rgba(0,0,0,0.2);
           }
+          
+          .collapse-toggle[aria-expanded=\"false\"] {
+            border-radius: 12px;
+            padding: 12px;
+            width: 40px;
+            height: 40px;
+            border-12px solid white;
+            background: #fff;
+            box-shadow: 4px 4px 8px rgba(0,0,0,0.4);
+            margin-left: 10px;
+            top: 0 !important;
+            left: 0 !important;
+          }
+          .collapse-toggle:hover {
+            background: #eee !important;
+          }   
+          
           .main.bslib-gap-spacing.html-fill-container {
             outline: none;
             padding-top: 0;