diff --git a/resources/css/layout/menu-mobile-brand.css b/resources/css/layout/menu-mobile-brand.css
index ee07837..826ab58 100644
--- a/resources/css/layout/menu-mobile-brand.css
+++ b/resources/css/layout/menu-mobile-brand.css
@@ -6,13 +6,15 @@
   }
 
   #mobile-menu-toggle {
-    @apply underline underline-offset-4 bg-red-500 flex gap-2 items-center;
+    @apply underline underline-offset-4  flex gap-2 items-center;
     &[aria-expanded] {
-      @apply bg-green-500;
       &::after {
-        @apply block w-10 h-10 bg-red-500 content-['Fermer'];
-        content: 'Fermer';
-        
+        @apply block w-4 h-4;
+        content: '';
+        background-image: url('../resources/img/close_menu_icon.svg');
+        background-size: contain;
+        background-repeat: no-repeat;
+        background-position: center;
       }
     }
   }
diff --git a/resources/js/header.js b/resources/js/header.js
index 11b91e6..a0f4e4c 100644
--- a/resources/js/header.js
+++ b/resources/js/header.js
@@ -1,76 +1,141 @@
-export default function menuInit() {
-  let main_navigation = document.querySelector('#primary-menu');
-  const header = document.querySelector('#primary-header');
-  if (!header) return;
+/**
+ * Menu mobile + sous-menus du header (équivalent logique de header.ts côté dynamiques).
+ */
+class HeaderMenu {
+  constructor() {
+    this.header = document.querySelector('#primary-header');
+    this.primaryMenu = this.header?.querySelector('#primary-menu') ?? null;
+    this.mobileMenuToggle = this.header?.querySelector('#mobile-menu-toggle') ?? null;
+    this.menusWrapper = this.header?.querySelector('.menus-wrapper') ?? null;
+    this.submenuToggles = this.header
+      ? this.header.querySelectorAll('.menu-item__submenu-toggle')
+      : [];
 
-  const primary_menu = header.querySelector('#primary-menu');
-  const mobileMenuToggle = header.querySelector('#mobile-menu-toggle');
-  const submenuToggles = header.querySelectorAll('.menu-item__submenu-toggle');
-  const menusWrapper = header.querySelector('.menus-wrapper');
-
-  function closeSubmenus() {
-    submenuToggles.forEach((button) => {
-      button.setAttribute('aria-expanded', 'false');
-      const sub = button.parentElement?.querySelector('.sub-menu');
-      if (sub) sub.classList.remove('sub-menu-open');
-    });
+    this.init();
   }
 
-  // #### Open/close burger nav
-  mobileMenuToggle.addEventListener('click', function (e) {
-    e.preventDefault();
-    const isOpen = header.classList.contains('nav-open');
-    header.classList.toggle('nav-open');
-    mobileMenuToggle.toggleAttribute('aria-expanded');
-    if (!isOpen) {
-      gsap.from(menusWrapper, {
+  /**
+   * Vérifie les éléments nécessaires et attache les écouteurs.
+   */
+  init() {
+    if (!this.header || !this.mobileMenuToggle) {
+      console.warn('HeaderMenu : #primary-header ou #mobile-menu-toggle introuvable');
+      return;
+    }
+    this.bindEvents();
+  }
+
+  /**
+   * Lie tous les événements (toggle, focus, sous-menus, document).
+   */
+  bindEvents() {
+    this.mobileMenuToggle.addEventListener('click', (e) => this.handleToggleClick(e));
+
+    document.addEventListener('focusin', (e) => this.handleFocusOut(e), true);
+
+    this.submenuToggles.forEach((button) => {
+      button.addEventListener('click', (e) => this.handleSubmenuToggle(e, button));
+    });
+
+    document.addEventListener('click', (e) => this.handleDocumentClick(e));
+    document.addEventListener('keydown', (e) => this.handleDocumentKeydown(e));
+  }
+
+  isMenuOpen() {
+    return this.header?.classList.contains('nav-open') ?? false;
+  }
+
+  openMenu() {
+    if (!this.header || !this.mobileMenuToggle || this.isMenuOpen()) return;
+
+    this.header.classList.add('nav-open');
+    this.mobileMenuToggle.setAttribute('aria-expanded', 'true');
+
+    this.mobileMenuToggle.textContent = 'Fermer';
+
+    if (typeof gsap !== 'undefined' && this.menusWrapper) {
+      gsap.from(this.menusWrapper, {
         opacity: 20,
         y: '-100vh',
         duration: 0.5,
         ease: Power4.easeOut,
       });
     }
-  });
+  }
 
-  // // #### Close nav when reaching the end of the menu with tab
-  // document.addEventListener(
-  //   'focusin',
-  //   (e) => {
-  //     const header = document.querySelector('#primary-header');
-  //     if (
-  //       header.classList.contains('nav-open') &&
-  //       !header.contains(document.activeElement)
-  //     ) {
-  //       header.classList.remove('nav-open');
-  //       burgerMenuToggle.setAttribute('aria-expanded', false);
+  closeMenu() {
+    if (!this.header || !this.mobileMenuToggle || !this.isMenuOpen()) return;
 
-  //       burgerMenuToggle.focus();
-  //     }
-  //   },
-  //   true,
-  // );
+    this.header.classList.remove('nav-open');
+    this.mobileMenuToggle.removeAttribute('aria-expanded');
+    this.mobileMenuToggle.textContent = 'Menu';
+  }
 
-  submenuToggles.forEach((button) => {
-    button.addEventListener('click', function (e) {
-      let isExpanded = button.getAttribute('aria-expanded') === 'true';
+  toggleMenu() {
+    if (this.isMenuOpen()) {
+      this.closeMenu();
+    } else {
+      this.openMenu();
+    }
+  }
 
-      closeSubmenus();
-      if (!isExpanded) {
-        button.setAttribute('aria-expanded', true);
-        button.parentElement.querySelector('.sub-menu').classList.add('sub-menu-open');
-      }
+  closeAllSubmenus() {
+    this.submenuToggles.forEach((button) => {
+      button.setAttribute('aria-expanded', 'false');
+      const sub = button.parentElement?.querySelector('.sub-menu');
+      if (sub) sub.classList.remove('sub-menu-open');
     });
-  });
+  }
 
-  document.addEventListener('click', (e) => {
-    if (!header.contains(e.target)) {
-      closeSubmenus();
-    }
-  });
+  handleToggleClick(e) {
+    e.preventDefault();
+    this.toggleMenu();
+  }
 
-  document.addEventListener('keydown', function (e) {
+  /**
+   * Tab / focus hors du header : ferme la nav et renvoie le focus sur le bouton.
+   */
+  handleFocusOut(e) {
+    if (!this.header || !this.mobileMenuToggle || !this.isMenuOpen()) return;
+
+    const target = e.target;
+    if (!(target instanceof Node)) return;
+    if (this.header.contains(target)) return;
+
+    this.closeMenu();
+    this.closeAllSubmenus();
+    this.mobileMenuToggle.focus();
+  }
+
+  /**
+   * Clic en dehors du header : ferme uniquement les sous-menus (comportement actuel).
+   */
+  handleDocumentClick(e) {
+    const target = e.target;
+    if (!(target instanceof Node) || !this.header) return;
+    if (this.header.contains(target)) return;
+    this.closeAllSubmenus();
+  }
+
+  handleDocumentKeydown(e) {
     if (e.key === 'Escape') {
-      closeSubmenus();
+      this.closeAllSubmenus();
     }
-  });
+  }
+
+  /**
+   * Accordéon : un seul sous-menu ouvert à la fois.
+   */
+  handleSubmenuToggle(e, button) {
+    const isExpanded = button.getAttribute('aria-expanded') === 'true';
+    this.closeAllSubmenus();
+    if (!isExpanded) {
+      button.setAttribute('aria-expanded', 'true');
+      button.parentElement?.querySelector('.sub-menu')?.classList.add('sub-menu-open');
+    }
+  }
+}
+
+export default function menuInit() {
+  return new HeaderMenu();
 }