diff --git a/ui/src/routes/+layout.svelte b/ui/src/routes/+layout.svelte
index 6c055a0..dd3b076 100644
--- a/ui/src/routes/+layout.svelte
+++ b/ui/src/routes/+layout.svelte
@@ -8,6 +8,9 @@
 
 	let { children, data }: { children: Snippet; data: LayoutData } = $props();
 
+	// Mobile nav drawer state
+	let menuOpen = $state(false);
+
 	// The single <audio> element that persists across navigations.
 	// AudioPlayer components in chapter pages control it via audioStore.
 	let audioEl = $state<HTMLAudioElement | null>(null);