diff --git a/nuxt4-app/app/layouts/informe.vue b/nuxt4-app/app/layouts/informe.vue
index 4c0d998..37333c3 100644
--- a/nuxt4-app/app/layouts/informe.vue
+++ b/nuxt4-app/app/layouts/informe.vue
@@ -179,7 +179,15 @@ import { useRoute } from 'vue-router'
 
 const route = useRoute()
 
-const sidebarOpen = ref(true)
+// Detectar si es móvil en el primer montaje
+const isMobile = () => {
+  if (import.meta.client) {
+    return window.innerWidth < 1024 // lg breakpoint
+  }
+  return false
+}
+
+const sidebarOpen = ref(!isMobile()) // Cerrada en móvil, abierta en desktop
 const sidebarCollapsed = ref(false)
 
 const showActions = ref(true)