diff --git a/src/types/index.ts b/src/types/index.ts
new file mode 100644
index 0000000..e125643
--- /dev/null
+++ b/src/types/index.ts
@@ -0,0 +1,40 @@
+export type PostStatus = "draft" | "published";
+
+export interface Post {
+  id: string;
+  title: string;
+  slug: string;
+  content: string;
+  excerpt?: string;
+  status: PostStatus;
+  tags: string[];
+  coverImage?: string;
+  views?: number;
+  createdAt: string;
+  updatedAt: string;
+}
+
+export interface User {
+  id: string;
+  name: string;
+  email: string;
+  password?: string;
+  avatar?: string;
+}
+
+export interface AuthState {
+  user: User | null;
+  isAuthenticated: boolean;
+  login: (email: string, password: string) => boolean;
+  logout: () => void;
+  checkAuth: () => void;
+  updateUser: (data: Partial<User>) => void;
+}
+
+export interface ContentState {
+  posts: Post[];
+  addPost: (post: Omit<Post, "id" | "createdAt" | "updatedAt">) => Post;
+  updatePost: (id: string, data: Partial<Post>) => void;
+  deletePost: (id: string) => void;
+  getPostById: (id: string) => Post | undefined;
+}