diff --git a/src/store/cmsStore.ts b/src/store/cmsStore.ts
new file mode 100644
index 0000000..a5be28f
--- /dev/null
+++ b/src/store/cmsStore.ts
@@ -0,0 +1,251 @@
+import { create } from 'zustand'
+import { persist } from 'zustand/middleware'
+import { v4 as uuidv4 } from 'uuid'
+import { Post, Page, GalleryImage, NavItem, SiteSettings, Category } from '@/types'
+
+interface CMSState {
+  posts: Post[]
+  pages: Page[]
+  gallery: GalleryImage[]
+  navItems: NavItem[]
+  categories: Category[]
+  settings: SiteSettings
+
+  // Posts
+  addPost: (post: Omit<Post, 'id' | 'createdAt' | 'updatedAt' | 'views'>) => Post
+  updatePost: (id: string, data: Partial<Post>) => void
+  deletePost: (id: string) => void
+  getPost: (id: string) => Post | undefined
+
+  // Pages
+  addPage: (page: Omit<Page, 'id' | 'createdAt' | 'updatedAt'>) => Page
+  updatePage: (id: string, data: Partial<Page>) => void
+  deletePage: (id: string) => void
+  getPage: (id: string) => Page | undefined
+
+  // Gallery
+  addImage: (image: Omit<GalleryImage, 'id' | 'uploadedAt'>) => void
+  deleteImage: (id: string) => void
+  updateImage: (id: string, data: Partial<GalleryImage>) => void
+
+  // Navigation
+  addNavItem: (item: Omit<NavItem, 'id'>) => void
+  updateNavItem: (id: string, data: Partial<NavItem>) => void
+  deleteNavItem: (id: string) => void
+  reorderNavItems: (items: NavItem[]) => void
+
+  // Categories
+  addCategory: (cat: Omit<Category, 'id'>) => void
+  updateCategory: (id: string, data: Partial<Category>) => void
+  deleteCategory: (id: string) => void
+
+  // Settings
+  updateSettings: (data: Partial<SiteSettings>) => void
+}
+
+const now = () => new Date().toISOString()
+
+const DEMO_POSTS: Post[] = [
+  {
+    id: '1',
+    title: 'Bienvenue sur mon blog',
+    slug: 'bienvenue-sur-mon-blog',
+    content: '<h2>Bonjour tout le monde !</h2><p>Ceci est mon premier article de blog. Je suis ravi de partager mes pensées et expériences avec vous.</p><p>Ce CMS vous permet de gérer facilement vos articles, pages, galerie et navigation.</p>',
+    excerpt: 'Mon premier article de blog pour inaugurer ce CMS personnel.',
+    status: 'published',
+    category: 'Général',
+    tags: ['bienvenue', 'premier article'],
+    author: 'admin',
+    createdAt: new Date(Date.now() - 7 * 24 * 3600 * 1000).toISOString(),
+    updatedAt: new Date(Date.now() - 7 * 24 * 3600 * 1000).toISOString(),
+    publishedAt: new Date(Date.now() - 7 * 24 * 3600 * 1000).toISOString(),
+    views: 142,
+  },
+  {
+    id: '2',
+    title: 'Guide de démarrage rapide',
+    slug: 'guide-demarrage-rapide',
+    content: '<h2>Premiers pas avec le CMS</h2><p>Ce guide vous explique comment utiliser toutes les fonctionnalités du CMS.</p><ul><li>Créer des articles</li><li>Gérer les pages</li><li>Organiser la galerie</li><li>Configurer la navigation</li></ul>',
+    excerpt: 'Apprenez à utiliser toutes les fonctionnalités du CMS en quelques minutes.',
+    status: 'published',
+    category: 'Tutoriel',
+    tags: ['guide', 'démarrage', 'tutoriel'],
+    author: 'admin',
+    createdAt: new Date(Date.now() - 3 * 24 * 3600 * 1000).toISOString(),
+    updatedAt: new Date(Date.now() - 3 * 24 * 3600 * 1000).toISOString(),
+    publishedAt: new Date(Date.now() - 3 * 24 * 3600 * 1000).toISOString(),
+    views: 89,
+  },
+  {
+    id: '3',
+    title: 'Article en brouillon',
+    slug: 'article-en-brouillon',
+    content: '<p>Cet article est en cours de rédaction...</p>',
+    excerpt: 'Un article non publié.',
+    status: 'draft',
+    category: 'Général',
+    tags: ['brouillon'],
+    author: 'editor',
+    createdAt: new Date(Date.now() - 1 * 24 * 3600 * 1000).toISOString(),
+    updatedAt: new Date(Date.now() - 1 * 24 * 3600 * 1000).toISOString(),
+    views: 0,
+  },
+]
+
+const DEMO_PAGES: Page[] = [
+  {
+    id: '1',
+    title: 'À propos',
+    slug: 'a-propos',
+    content: '<h2>Qui suis-je ?</h2><p>Bienvenue sur ma page à propos. Je suis un développeur passionné par les nouvelles technologies.</p>',
+    status: 'published',
+    template: 'default',
+    createdAt: new Date(Date.now() - 14 * 24 * 3600 * 1000).toISOString(),
+    updatedAt: new Date(Date.now() - 14 * 24 * 3600 * 1000).toISOString(),
+  },
+  {
+    id: '2',
+    title: 'Contact',
+    slug: 'contact',
+    content: '<h2>Me contacter</h2><p>N\'hésitez pas à me contacter pour toute question.</p>',
+    status: 'published',
+    template: 'default',
+    createdAt: new Date(Date.now() - 10 * 24 * 3600 * 1000).toISOString(),
+    updatedAt: new Date(Date.now() - 10 * 24 * 3600 * 1000).toISOString(),
+  },
+]
+
+const DEMO_NAV: NavItem[] = [
+  { id: '1', label: 'Accueil', href: '/', order: 0, isExternal: false },
+  { id: '2', label: 'Blog', href: '/blog', order: 1, isExternal: false },
+  { id: '3', label: 'À propos', href: '/a-propos', order: 2, isExternal: false },
+  { id: '4', label: 'Contact', href: '/contact', order: 3, isExternal: false },
+]
+
+const DEMO_CATEGORIES: Category[] = [
+  { id: '1', name: 'Général', slug: 'general', color: '#6366f1' },
+  { id: '2', name: 'Tutoriel', slug: 'tutoriel', color: '#10b981' },
+  { id: '3', name: 'Actualité', slug: 'actualite', color: '#f59e0b' },
+  { id: '4', name: 'Projet', slug: 'projet', color: '#ef4444' },
+]
+
+const DEFAULT_SETTINGS: SiteSettings = {
+  siteName: 'Mon Blog',
+  siteDescription: 'Un blog personnel propulsé par le CMS',
+  siteUrl: 'https://monblog.com',
+  primaryColor: '#6366f1',
+  postsPerPage: 10,
+  allowComments: true,
+  maintenanceMode: false,
+  socialLinks: {
+    twitter: '',
+    github: '',
+    linkedin: '',
+  },
+}
+
+export const useCMSStore = create<CMSState>()(
+  persist(
+    (set, get) => ({
+      posts: DEMO_POSTS,
+      pages: DEMO_PAGES,
+      gallery: [],
+      navItems: DEMO_NAV,
+      categories: DEMO_CATEGORIES,
+      settings: DEFAULT_SETTINGS,
+
+      // Posts
+      addPost: (postData) => {
+        const post: Post = {
+          ...postData,
+          id: uuidv4(),
+          createdAt: now(),
+          updatedAt: now(),
+          views: 0,
+        }
+        set((s) => ({ posts: [post, ...s.posts] }))
+        return post
+      },
+      updatePost: (id, data) =>
+        set((s) => ({
+          posts: s.posts.map((p) =>
+            p.id === id ? { ...p, ...data, updatedAt: now() } : p
+          ),
+        })),
+      deletePost: (id) =>
+        set((s) => ({ posts: s.posts.filter((p) => p.id !== id) })),
+      getPost: (id) => get().posts.find((p) => p.id === id),
+
+      // Pages
+      addPage: (pageData) => {
+        const page: Page = {
+          ...pageData,
+          id: uuidv4(),
+          createdAt: now(),
+          updatedAt: now(),
+        }
+        set((s) => ({ pages: [page, ...s.pages] }))
+        return page
+      },
+      updatePage: (id, data) =>
+        set((s) => ({
+          pages: s.pages.map((p) =>
+            p.id === id ? { ...p, ...data, updatedAt: now() } : p
+          ),
+        })),
+      deletePage: (id) =>
+        set((s) => ({ pages: s.pages.filter((p) => p.id !== id) })),
+      getPage: (id) => get().pages.find((p) => p.id === id),
+
+      // Gallery
+      addImage: (imgData) => {
+        const image: GalleryImage = {
+          ...imgData,
+          id: uuidv4(),
+          uploadedAt: now(),
+        }
+        set((s) => ({ gallery: [image, ...s.gallery] }))
+      },
+      deleteImage: (id) =>
+        set((s) => ({ gallery: s.gallery.filter((i) => i.id !== id) })),
+      updateImage: (id, data) =>
+        set((s) => ({
+          gallery: s.gallery.map((i) => (i.id === id ? { ...i, ...data } : i)),
+        })),
+
+      // Navigation
+      addNavItem: (itemData) => {
+        const item: NavItem = { ...itemData, id: uuidv4() }
+        set((s) => ({ navItems: [...s.navItems, item] }))
+      },
+      updateNavItem: (id, data) =>
+        set((s) => ({
+          navItems: s.navItems.map((i) => (i.id === id ? { ...i, ...data } : i)),
+        })),
+      deleteNavItem: (id) =>
+        set((s) => ({ navItems: s.navItems.filter((i) => i.id !== id) })),
+      reorderNavItems: (items) => set({ navItems: items }),
+
+      // Categories
+      addCategory: (catData) => {
+        const cat: Category = { ...catData, id: uuidv4() }
+        set((s) => ({ categories: [...s.categories, cat] }))
+      },
+      updateCategory: (id, data) =>
+        set((s) => ({
+          categories: s.categories.map((c) =>
+            c.id === id ? { ...c, ...data } : c
+          ),
+        })),
+      deleteCategory: (id) =>
+        set((s) => ({ categories: s.categories.filter((c) => c.id !== id) })),
+
+      // Settings
+      updateSettings: (data) =>
+        set((s) => ({ settings: { ...s.settings, ...data } })),
+    }),
+    {
+      name: 'cms-data',
+    }
+  )
+)