diff --git a/settings/hyprland.nix b/settings/hyprland.nix
index 5be3e44..dd0737f 100644
--- a/settings/hyprland.nix
+++ b/settings/hyprland.nix
@@ -227,6 +227,12 @@ in
             hl.animation({ leaf = "workspaces", enabled = true, speed = 1, bezier = "snap" })
 
             -- Window rules
+            -- Don't lock/idle while any window is fullscreen (video, games).
+            hl.window_rule({
+              match = { class = ".*" },
+              idle_inhibit = "fullscreen",
+            })
+
             -- Battle.net tray icon leaks as a tiny floating XWayland window.
             hl.window_rule({
               match = { class = "steam_app_0", title = "^$", float = true },