diff --git a/frontend/components/AppTopNav.vue b/frontend/components/AppTopNav.vue
index 115d5f3..1f2b7e3 100644
--- a/frontend/components/AppTopNav.vue
+++ b/frontend/components/AppTopNav.vue
@@ -1,7 +1,14 @@
 <template>
-    <header ref="headerRef" class="border-b border-neutral-200 bg-primary-500 p-5 text-white">
-        <div class="flex h-full items-center justify-end">
-            <div class="flex gap-6 text-xl text-white">
+    <header ref="headerRef" class="border-b border-neutral-200 bg-primary-500 px-4 py-3 text-white lg:p-5">
+        <div class="flex h-full items-center justify-between lg:justify-end">
+            <button
+                type="button"
+                class="rounded-md p-1 text-white hover:text-neutral-200 lg:hidden"
+                @click="$emit('toggleSidebar')"
+            >
+                <Icon name="mdi:menu" size="28"/>
+            </button>
+            <div class="flex gap-4 text-xl text-white lg:gap-6">
                 <div v-if="isAdmin" ref="bellRoot" class="relative">
                     <button type="button" class="relative self-center cursor-pointer flex items-center" @click="toggleNotifications">
                         <Icon name="mdi:bell-plus" size="36"/>
@@ -15,8 +22,8 @@
 
                     <div
                         v-if="isNotificationsOpen"
-                        class="fixed right-[20px] z-30 w-[400px] rounded-md border border-neutral-200 bg-white text-neutral-800 shadow-lg"
-                        :style="{ top: `${navbarBottom + 20}px` }"
+                        class="fixed right-2 z-30 w-[calc(100vw-1rem)] max-w-[400px] rounded-md border border-neutral-200 bg-white text-neutral-800 shadow-lg lg:right-[20px]"
+                        :style="{ top: `${navbarBottom + 10}px` }"
                     >
                         <div class="px-3 pt-3 pb-6 text-xl font-semibold">
                             Notifications
@@ -66,7 +73,7 @@
                 <div ref="userMenuRoot" class="relative flex gap-4">
                     <button type="button" class="flex items-center gap-4 cursor-pointer" @click="toggleUserMenu">
                         <Icon name="mdi:account-circle-outline" class="self-center" size="36"/>
-                        <p class="self-center">{{ user?.username }}</p>
+                        <p class="hidden self-center sm:block">{{ user?.username }}</p>
                     </button>
                     <div
                         v-if="isUserMenuOpen"
@@ -103,6 +110,10 @@ defineProps<{
     user?: User
 }>()
 
+defineEmits<{
+    (event: 'toggleSidebar'): void
+}>()
+
 const formatTimeAgo = (dateString: string): string => {
     const date = new Date(dateString)
     const now = new Date()
diff --git a/frontend/layouts/default.vue b/frontend/layouts/default.vue
index 176d651..b3797fd 100644
--- a/frontend/layouts/default.vue
+++ b/frontend/layouts/default.vue
@@ -1,11 +1,40 @@
 <template>
     <div class="h-screen overflow-hidden">
         <div class="flex h-full">
-            <aside class="flex h-full w-64 flex-shrink-0 flex-col border-r border-neutral-200 bg-tertiary-500">
-                <div class="h-[75px]">
+            <!-- Mobile overlay -->
+            <Transition
+                enter-active-class="transition-opacity duration-300"
+                enter-from-class="opacity-0"
+                enter-to-class="opacity-100"
+                leave-active-class="transition-opacity duration-300"
+                leave-from-class="opacity-100"
+                leave-to-class="opacity-0"
+            >
+                <div
+                    v-if="sidebarOpen"
+                    class="fixed inset-0 z-40 bg-black/50 lg:hidden"
+                    @click="sidebarOpen = false"
+                />
+            </Transition>
+
+            <!-- Sidebar -->
+            <aside
+                :class="[
+                    'fixed inset-y-0 left-0 z-50 flex w-64 flex-col border-r border-neutral-200 bg-tertiary-500 transition-transform duration-300 lg:static lg:translate-x-0 lg:flex-shrink-0',
+                    sidebarOpen ? 'translate-x-0' : '-translate-x-full'
+                ]"
+            >
+                <div class="flex h-[75px] items-center justify-between">
                     <img src="/malio.png" alt="Logo" class="w-auto"/>
+                    <button
+                        type="button"
+                        class="mr-3 rounded-md p-1 text-neutral-500 hover:text-primary-500 lg:hidden"
+                        @click="sidebarOpen = false"
+                    >
+                        <Icon name="mdi:close" size="24"/>
+                    </button>
                 </div>
-                <nav class="flex-1 px-4 pb-6">
+                <nav class="flex-1 overflow-y-auto px-4 pb-6">
                     <template v-if="isAdmin">
                         <NuxtLink
                             to="/calendar"
@@ -13,6 +42,7 @@
                             :class="route.path.startsWith('/calendar')
                             ? 'bg-tertiary-500 text-primary-500 font-bold'
                             : ''"
+                            @click="closeSidebarOnMobile"
                         >
                             <Icon name="mdi:calendar-blank" size="24"/>
                             <p>Calendrier</p>
@@ -26,6 +56,7 @@
                             route.path.startsWith('/hours') ? 'bg-tertiary-500 text-primary-500 font-bold' : '',
                             !isAdmin ? 'border-t border-secondary-500 pt-3' : ''
                         ]"
+                        @click="closeSidebarOnMobile"
                     >
                         <Icon name="mdi:clock-time-four-outline" size="24"/>
                         <p>Heures</p>
@@ -38,6 +69,7 @@
                             route.path.startsWith('/driver-hours') ? 'bg-tertiary-500 text-primary-500 font-bold' : '',
                             !isAdmin && isDriver ? 'border-t border-secondary-500 pt-3' : ''
                         ]"
+                        @click="closeSidebarOnMobile"
                     >
                         <Icon name="mdi:truck-outline" size="24"/>
                         <p>Heures Conducteurs</p>
@@ -49,6 +81,7 @@
                             :class="route.path.startsWith('/employees')
                             ? 'bg-tertiary-500 text-primary-500 font-bold'
                             : ''"
+                            @click="closeSidebarOnMobile"
                         >
                             <Icon name="mdi:account-group-outline" size="24"/>
                             <p>Employés</p>
@@ -60,6 +93,7 @@
                             :class="route.path.startsWith('/leave-recap')
                             ? 'bg-tertiary-500 text-primary-500 font-bold'
                             : ''"
+                            @click="closeSidebarOnMobile"
                         >
                             <Icon name="mdi:beach" size="24"/>
                             <p>Récap. congés</p>
@@ -70,6 +104,7 @@
                             :class="route.path.startsWith('/sites')
                             ? 'bg-tertiary-500 text-primary-500 font-bold'
                             : ''"
+                            @click="closeSidebarOnMobile"
                         >
                             <Icon name="mdi:business" size="24"/>
                             <p>Sites</p>
@@ -80,6 +115,7 @@
                             :class="route.path.startsWith('/absence-types')
                             ? 'bg-tertiary-500 text-primary-500 font-bold'
                             : ''"
+                            @click="closeSidebarOnMobile"
                         >
                             <Icon name="mdi:umbrella-beach-outline" size="24"/>
                             <p>Types de statut</p>
@@ -90,6 +126,7 @@
                             :class="route.path.startsWith('/users')
                             ? 'bg-tertiary-500 text-primary-500 font-bold'
                             : ''"
+                            @click="closeSidebarOnMobile"
                         >
                             <Icon name="mdi:account-outline" size="24"/>
                             <p>Utilisateurs</p>
@@ -100,6 +137,7 @@
                         to="/leave-recap"
                         class="flex items-center gap-2 py-3 text-md text-black hover:bg-tertiary-500 hover:text-primary-500 pt-3"
                         :class="route.path.startsWith('/leave-recap') ? 'bg-tertiary-500 text-primary-500 font-bold' : ''"
+                        @click="closeSidebarOnMobile"
                     >
                         <Icon name="mdi:beach" size="24"/>
                         <p>Récap. congés</p>
@@ -111,6 +149,7 @@
                         :class="route.path.startsWith('/audit-logs')
                             ? 'bg-tertiary-500 text-primary-500 font-bold'
                             : ''"
+                        @click="closeSidebarOnMobile"
                     >
                         <Icon name="mdi:clipboard-text-clock-outline" size="24"/>
                         <p>Journal</p>
@@ -121,6 +160,7 @@
                         :class="route.path.startsWith('/documentation')
                             ? 'bg-tertiary-500 text-primary-500 font-bold'
                             : ''"
+                        @click="closeSidebarOnMobile"
                     >
                         <Icon name="mdi:book-open-page-variant-outline" size="24"/>
                         <p>Documentation</p>
@@ -132,9 +172,9 @@
                 </div>
             </aside>
 
-            <div class="h-full flex-1 overflow-hidden flex flex-col">
-                <AppTopNav :user="auth.user" />
-                <main class="flex-1 overflow-y-auto px-8 py-12">
+            <div class="h-full flex-1 overflow-hidden flex flex-col min-w-0">
+                <AppTopNav :user="auth.user" @toggle-sidebar="sidebarOpen = !sidebarOpen" />
+                <main class="flex-1 overflow-y-auto px-4 py-6 lg:px-8 lg:py-12">
                     <slot/>
                 </main>
             </div>
@@ -150,4 +190,9 @@ const isSuperAdmin = computed(() => auth.user?.roles?.includes('ROLE_SUPER_ADMIN
 const isDriver = computed(() => auth.user?.isDriver ?? false)
 const hasLeaveRecapAccess = computed(() => auth.user?.hasLeaveRecapAccess ?? false)
 const route = useRoute()
+const sidebarOpen = ref(false)
+
+const closeSidebarOnMobile = () => {
+    sidebarOpen.value = false
+}
 </script>