Better list background

data/gtk/window.blp

@@ -76,7 +76,7 @@ template RugbyAppWindow : Adw.ApplicationWindow {
             tightening-threshold: 400;
 
             ListView listview {
-              styles ["rich-list"]
+              styles ["rich-list", "card"]
 
               factory: BuilderListItemFactory {
                 resource: "/uk/me/bcowan/Rugby/gtk/score-item.ui";