Update button style in the app.py file

app.py

@@ -344,8 +344,8 @@ js_code = """
     
     #custom-btn {
         padding: 6px;
-        width: 50px;
-        height: 50px;
+        width: 90px;
+        height: 90px;
         cursor: pointer;
         border-radius: 50%;
         background: #006666;