diff --git a/src/constants.rs b/src/constants.rs
new file mode 100644
index 0000000..747a08d
--- /dev/null
+++ b/src/constants.rs
@@ -0,0 +1,12 @@
+//! Program constants & defaults
+
+use bevy::prelude::*;
+
+#[derive(Debug, Reflect, Resource)]
+struct ConfigDefaults {}
+
+impl FromWorld for ConfigDefaults {
+  fn from_world(world: &mut World) -> Self {
+    todo!()
+  }
+}
diff --git a/src/main.rs b/src/main.rs
index c3ac2fb..15f823e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,6 +2,8 @@ use bevy::{prelude::*, window::WindowResolution};
 use bevy_inspector_egui::{bevy_egui::EguiPlugin, quick::WorldInspectorPlugin};
 
 mod card;
+mod constants;
+mod widgets;
 
 fn main() {
   App::new()
diff --git a/src/widgets.rs b/src/widgets.rs
new file mode 100644
index 0000000..f127cc1
--- /dev/null
+++ b/src/widgets.rs
@@ -0,0 +1 @@
+//! Catch-all location for UI bits