diff --git a/src/moonset/main.py b/src/moonset/main.py
index 8eeb764..8c3931a 100644
--- a/src/moonset/main.py
+++ b/src/moonset/main.py
@@ -58,7 +58,7 @@ class MoonsetApp(Gtk.Application):
 
     def __init__(self) -> None:
         super().__init__(application_id="dev.moonarch.moonset")
-        self._secondary_windows: list[WallpaperWindow] = []
+        self._windows: list[PanelWindow] = []
 
     def do_activate(self) -> None:
         """Create and present power menu windows on all monitors."""
@@ -73,37 +73,17 @@ class MoonsetApp(Gtk.Application):
         config = load_config()
         bg_path = resolve_background_path(config)
 
+        # Panel window on every monitor — keyboard exclusive on all so
+        # the focused monitor always captures input
         monitors = display.get_monitors()
-        primary_monitor = None
-
-        # Find primary monitor — fall back to first available
         for i in range(monitors.get_n_items()):
             monitor = monitors.get_item(i)
-            if hasattr(monitor, "is_primary") and monitor.is_primary():
-                primary_monitor = monitor
-                break
-        if primary_monitor is None and monitors.get_n_items() > 0:
-            primary_monitor = monitors.get_item(0)
-
-        # Main power menu window on primary monitor
-        panel = PanelWindow(bg_path=bg_path, application=self)
-        if HAS_LAYER_SHELL:
-            self._setup_layer_shell(panel, keyboard=True)
-            if primary_monitor is not None:
-                Gtk4LayerShell.set_monitor(panel, primary_monitor)
-        panel.present()
-
-        # Wallpaper-only windows on secondary monitors
-        for i in range(monitors.get_n_items()):
-            monitor = monitors.get_item(i)
-            if monitor == primary_monitor:
-                continue
-            wallpaper_win = WallpaperWindow(bg_path=bg_path, application=self)
+            panel = PanelWindow(bg_path=bg_path, application=self)
             if HAS_LAYER_SHELL:
-                self._setup_layer_shell(wallpaper_win, keyboard=False)
-                Gtk4LayerShell.set_monitor(wallpaper_win, monitor)
-            wallpaper_win.present()
-            self._secondary_windows.append(wallpaper_win)
+                self._setup_layer_shell(panel, keyboard=True)
+                Gtk4LayerShell.set_monitor(panel, monitor)
+            panel.present()
+            self._windows.append(panel)
 
     def _load_css(self, display: Gdk.Display) -> None:
         """Load the CSS stylesheet for the power menu."""
@@ -122,6 +102,7 @@ class MoonsetApp(Gtk.Application):
         """Configure gtk4-layer-shell for fullscreen OVERLAY display."""
         Gtk4LayerShell.init_for_window(window)
         Gtk4LayerShell.set_layer(window, Gtk4LayerShell.Layer.OVERLAY)
+        Gtk4LayerShell.set_exclusive_zone(window, -1)
         if keyboard:
             Gtk4LayerShell.set_keyboard_mode(
                 window, Gtk4LayerShell.KeyboardMode.EXCLUSIVE
diff --git a/src/moonset/panel.py b/src/moonset/panel.py
index 7ef9505..552e237 100644
--- a/src/moonset/panel.py
+++ b/src/moonset/panel.py
@@ -119,6 +119,9 @@ class PanelWindow(Gtk.ApplicationWindow):
         self._build_ui(bg_path)
         self._setup_keyboard()
 
+        # Focus the first action button once the window is mapped
+        self.connect("map", self._on_map)
+
     def _build_ui(self, bg_path: Path) -> None:
         """Build the panel layout with wallpaper background and action buttons."""
         # Main overlay for background + centered content
@@ -196,6 +199,19 @@ class PanelWindow(Gtk.ApplicationWindow):
         controller.connect("key-pressed", self._on_key_pressed)
         self.add_controller(controller)
 
+    def _on_map(self, widget: Gtk.Widget) -> None:
+        """Grab focus on the first action button once the window is visible."""
+        # Delay focus grab — layer shell keyboard interactivity may not
+        # be ready at map time
+        GLib.idle_add(self._grab_initial_focus)
+
+    def _grab_initial_focus(self) -> bool:
+        """Set focus on the first action button."""
+        first_button = self._button_box.get_first_child()
+        if first_button is not None:
+            first_button.grab_focus()
+        return GLib.SOURCE_REMOVE
+
     def _on_key_pressed(
         self,
         controller: Gtk.EventControllerKey,