Update demo.py

demo.py

@@ -61,7 +61,7 @@ css = """
 
 /* Set button widths to match the Select Model width */
 .button {
-    width: 250px;  /* Same as the select box width */
+    width: 100%;  /* Same as the select box width */
     height: 100px;  /* Button height */
 }
 
@@ -71,7 +71,7 @@ css = """
 }
 
 .Accordion {
-    Width: 250px;
+    Width: 100%;
 }
 
 """