diff --git a/README.md b/README.md
index 903c876f9..8c95e754c 100644
--- a/README.md
+++ b/README.md
@@ -33,4 +33,4 @@ Implement a simple [TODO app](https://mate-academy.github.io/react_todo-app/) th
 - Implement a solution following the [React task guidelines](https://github.com/mate-academy/react_task-guideline#react-tasks-guideline).
 - Use the [React TypeScript cheat sheet](https://mate-academy.github.io/fe-program/js/extra/react-typescript).
 - Open another terminal and run tests with `npm test` to ensure your solution is correct.
-- Replace `<your_account>` with your GitHub username in the [DEMO LINK](https://<your_account>.github.io/react_todo-app/) and add it to the PR description.
+- Replace `<your_account>` with your GitHub username in the [DEMO LINK](https://RuslanV23.github.io/react_todo-app/) and add it to the PR description.
diff --git a/src/App.tsx b/src/App.tsx
index a399287bd..0bacc89e9 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,156 +1,21 @@
 /* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+/* eslint-disable jsx-a11y/label-has-associated-control */
+import { useTodos } from './Context/TodoContext';
+import { TodoHeader } from './Components/TodoHeader';
+import { TodoList } from './Components/TodoList';
+import { TodoFooter } from './Components/TodoFooter';
 
 export const App: React.FC = () => {
+  const { todos } = useTodos();
+
   return (
     <div className="todoapp">
       <h1 className="todoapp__title">todos</h1>
 
       <div className="todoapp__content">
-        <header className="todoapp__header">
-          {/* this button should have `active` class only if all todos are completed */}
-          <button
-            type="button"
-            className="todoapp__toggle-all active"
-            data-cy="ToggleAllButton"
-          />
-
-          {/* Add a todo on form submit */}
-          <form>
-            <input
-              data-cy="NewTodoField"
-              type="text"
-              className="todoapp__new-todo"
-              placeholder="What needs to be done?"
-            />
-          </form>
-        </header>
-
-        <section className="todoapp__main" data-cy="TodoList">
-          {/* This is a completed todo */}
-          <div data-cy="Todo" className="todo completed">
-            <label className="todo__status-label">
-              <input
-                data-cy="TodoStatus"
-                type="checkbox"
-                className="todo__status"
-                checked
-              />
-            </label>
-
-            <span data-cy="TodoTitle" className="todo__title">
-              Completed Todo
-            </span>
-
-            {/* Remove button appears only on hover */}
-            <button type="button" className="todo__remove" data-cy="TodoDelete">
-              ×
-            </button>
-          </div>
-
-          {/* This todo is an active todo */}
-          <div data-cy="Todo" className="todo">
-            <label className="todo__status-label">
-              <input
-                data-cy="TodoStatus"
-                type="checkbox"
-                className="todo__status"
-              />
-            </label>
-
-            <span data-cy="TodoTitle" className="todo__title">
-              Not Completed Todo
-            </span>
-
-            <button type="button" className="todo__remove" data-cy="TodoDelete">
-              ×
-            </button>
-          </div>
-
-          {/* This todo is being edited */}
-          <div data-cy="Todo" className="todo">
-            <label className="todo__status-label">
-              <input
-                data-cy="TodoStatus"
-                type="checkbox"
-                className="todo__status"
-              />
-            </label>
-
-            {/* This form is shown instead of the title and remove button */}
-            <form>
-              <input
-                data-cy="TodoTitleField"
-                type="text"
-                className="todo__title-field"
-                placeholder="Empty todo will be deleted"
-                value="Todo is being edited now"
-              />
-            </form>
-          </div>
-
-          {/* This todo is in loadind state */}
-          <div data-cy="Todo" className="todo">
-            <label className="todo__status-label">
-              <input
-                data-cy="TodoStatus"
-                type="checkbox"
-                className="todo__status"
-              />
-            </label>
-
-            <span data-cy="TodoTitle" className="todo__title">
-              Todo is being saved now
-            </span>
-
-            <button type="button" className="todo__remove" data-cy="TodoDelete">
-              ×
-            </button>
-          </div>
-        </section>
-
-        {/* Hide the footer if there are no todos */}
-        <footer className="todoapp__footer" data-cy="Footer">
-          <span className="todo-count" data-cy="TodosCounter">
-            3 items left
-          </span>
-
-          {/* Active link should have the 'selected' class */}
-          <nav className="filter" data-cy="Filter">
-            <a
-              href="#/"
-              className="filter__link selected"
-              data-cy="FilterLinkAll"
-            >
-              All
-            </a>
-
-            <a
-              href="#/active"
-              className="filter__link"
-              data-cy="FilterLinkActive"
-            >
-              Active
-            </a>
-
-            <a
-              href="#/completed"
-              className="filter__link"
-              data-cy="FilterLinkCompleted"
-            >
-              Completed
-            </a>
-          </nav>
-
-          {/* this button should be disabled if there are no completed todos */}
-          <button
-            type="button"
-            className="todoapp__clear-completed"
-            data-cy="ClearCompletedButton"
-          >
-            Clear completed
-          </button>
-        </footer>
+        <TodoHeader />
+        <TodoList />
+        {todos.length !== 0 && <TodoFooter />}
       </div>
     </div>
   );
diff --git a/src/Components/TodoFooter.tsx b/src/Components/TodoFooter.tsx
new file mode 100644
index 000000000..6b2371368
--- /dev/null
+++ b/src/Components/TodoFooter.tsx
@@ -0,0 +1,51 @@
+import React from 'react';
+import { useTodos } from '../Context/TodoContext';
+import { QueryFilter } from '../Types/QueryFilter';
+import classNames from 'classnames';
+
+export const TodoFooter: React.FC = () => {
+  const {
+    todoLeft,
+    query,
+    setQuery,
+    isSomeTodosCompleted,
+    removeAllCompletedTodos,
+  } = useTodos();
+
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {todoLeft} items left
+      </span>
+
+      {/* Active link should have the 'selected' class */}
+      <nav className="filter" data-cy="Filter">
+        {Object.entries(QueryFilter).map(([key, value]) => {
+          return (
+            <a
+              key={key}
+              href={`#/${value}`}
+              className={classNames('filter__link', {
+                selected: query === value,
+              })}
+              data-cy={`FilterLink${key}`}
+              onClick={() => setQuery(value)}
+            >
+              {key}
+            </a>
+          );
+        })}
+      </nav>
+
+      <button
+        disabled={!isSomeTodosCompleted}
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        onClick={() => removeAllCompletedTodos()}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};
diff --git a/src/Components/TodoHeader.tsx b/src/Components/TodoHeader.tsx
new file mode 100644
index 000000000..b3f4052c1
--- /dev/null
+++ b/src/Components/TodoHeader.tsx
@@ -0,0 +1,64 @@
+import React, { useState } from 'react';
+import { useTodos } from '../Context/TodoContext';
+import { Todo } from '../Types/Todo';
+import classNames from 'classnames';
+
+export const TodoHeader: React.FC = () => {
+  const [title, setTitle] = useState('');
+  const {
+    todos,
+    addTodo,
+    headerInputRef,
+    isAllTodosCompleted,
+    toggleAllTodos,
+  } = useTodos();
+
+  const handleSubmit = (event: React.FormEvent<HTMLFormElement>) => {
+    event.preventDefault();
+
+    const titleTrim = title.trim();
+
+    if (titleTrim.length === 0) {
+      return;
+    }
+
+    const newTodo: Todo = {
+      id: +new Date(),
+      title: titleTrim,
+      completed: false,
+    };
+
+    if (addTodo) {
+      addTodo(newTodo);
+    }
+
+    setTitle('');
+  };
+
+  return (
+    <header className="todoapp__header">
+      {todos.length !== 0 && (
+        <button
+          type="button"
+          className={classNames('todoapp__toggle-all', {
+            active: isAllTodosCompleted,
+          })}
+          onClick={() => toggleAllTodos()}
+          data-cy="ToggleAllButton"
+        />
+      )}
+
+      <form onSubmit={handleSubmit}>
+        <input
+          ref={headerInputRef}
+          data-cy="NewTodoField"
+          type="text"
+          value={title}
+          className="todoapp__new-todo"
+          placeholder="What needs to be done?"
+          onChange={event => setTitle(event.target.value)}
+        />
+      </form>
+    </header>
+  );
+};
diff --git a/src/Components/TodoItem.tsx b/src/Components/TodoItem.tsx
new file mode 100644
index 000000000..71c70320c
--- /dev/null
+++ b/src/Components/TodoItem.tsx
@@ -0,0 +1,102 @@
+/* eslint-disable jsx-a11y/control-has-associated-label */
+/* eslint-disable jsx-a11y/label-has-associated-control */
+
+import classNames from 'classnames';
+import React from 'react';
+import { Todo } from '../Types/Todo';
+import { useTodos } from '../Context/TodoContext';
+
+export const TodoItem: React.FC<{ todo: Todo }> = ({ todo }) => {
+  const {
+    updateTodo,
+    deleteTodo,
+    toggleTodo,
+    setEditTodo,
+    editTodo,
+    editingInputRef,
+  } = useTodos();
+
+  return (
+    <div
+      data-cy="Todo"
+      className={classNames('todo', { completed: todo.completed })}
+    >
+      <label className="todo__status-label">
+        <input
+          data-cy="TodoStatus"
+          type="checkbox"
+          className="todo__status"
+          checked={todo.completed}
+          onChange={() => toggleTodo(todo.id)}
+        />
+      </label>
+      {editTodo?.id === todo.id ? (
+        <form
+          onSubmit={() => {
+            updateTodo({
+              title: editTodo.title,
+              id: editTodo.id,
+              completed: editTodo.completed,
+            } as Todo);
+            setEditTodo(null);
+          }}
+        >
+          <input
+            data-cy="TodoTitleField"
+            type="text"
+            className="todo__title-field"
+            placeholder="Empty todo will be deleted"
+            value={editTodo.title}
+            onKeyDown={event => {
+              if (event.key === 'Escape') {
+                setEditTodo(null);
+              }
+            }}
+            ref={editingInputRef}
+            onChange={event =>
+              setEditTodo(currentEdit =>
+                currentEdit
+                  ? { ...currentEdit, title: event.target.value }
+                  : currentEdit,
+              )
+            }
+            onBlur={() => {
+              updateTodo({
+                title: editTodo.title,
+                id: editTodo.id,
+                completed: editTodo.completed,
+              } as Todo);
+              setEditTodo(null);
+            }}
+          />
+        </form>
+      ) : (
+        <>
+          <span
+            data-cy="TodoTitle"
+            className="todo__title"
+            onDoubleClick={() =>
+              setEditTodo({
+                id: todo.id,
+                title: todo.title,
+                completed: todo.completed,
+              })
+            }
+          >
+            {todo.title}
+          </span>
+
+          {/* Remove button appears only on hover */}
+          <button
+            type="button"
+            className="todo__remove"
+            data-cy="TodoDelete"
+            onClick={() => deleteTodo(todo.id)}
+          >
+            ×
+          </button>
+        </>
+      )}
+    </div>
+  );
+};
diff --git a/src/Components/TodoList.tsx b/src/Components/TodoList.tsx
new file mode 100644
index 000000000..56798a46e
--- /dev/null
+++ b/src/Components/TodoList.tsx
@@ -0,0 +1,14 @@
+import { useTodos } from '../Context/TodoContext';
+import { TodoItem } from './TodoItem';
+
+export const TodoList: React.FC = () => {
+  const { filteredTodos } = useTodos();
+
+  return (
+    <section className="todoapp__main" data-cy="TodoList">
+      {filteredTodos.map(todo => {
+        return <TodoItem todo={todo} key={todo.id} />;
+      })}
+    </section>
+  );
+};
diff --git a/src/Context/TodoContext.tsx b/src/Context/TodoContext.tsx
new file mode 100644
index 000000000..5b5507f14
--- /dev/null
+++ b/src/Context/TodoContext.tsx
@@ -0,0 +1,205 @@
+import React, {
+  useCallback,
+  useContext,
+  useEffect,
+  useMemo,
+  useRef,
+  useState,
+} from 'react';
+
+import { Todo } from '../Types/Todo';
+import { QueryFilter } from '../Types/QueryFilter';
+
+type TodoContextType = {
+  todos: Todo[];
+  filteredTodos: Todo[];
+  addTodo: (todos: Todo) => void;
+
+  query: QueryFilter;
+  setQuery: (query: QueryFilter) => void;
+
+  deleteTodo: (todoId: number) => void;
+  updateTodo: (newTodo: Todo) => void;
+  toggleTodo: (todoId: number) => void;
+  toggleAllTodos: () => void;
+  setEditTodo: React.Dispatch<React.SetStateAction<Todo | null>>;
+  removeAllCompletedTodos: () => void;
+
+  todoLeft: number;
+  headerInputRef: React.RefObject<HTMLInputElement>;
+  editingInputRef: React.RefObject<HTMLInputElement>;
+  editTodo: Todo | null;
+  isAllTodosCompleted: boolean;
+  isSomeTodosCompleted: boolean;
+};
+
+const STORAGE_KEY = 'todos';
+
+type Props = {
+  children: React.ReactNode;
+};
+
+const TodoContext = React.createContext<TodoContextType | undefined>(undefined);
+
+export const TodoProvider: React.FC<Props> = ({ children }) => {
+  const [editTodo, setEditTodo] = useState<Todo | null>(null);
+  const [todos, setTodos] = useState<Todo[]>([]);
+
+  const [query, setQuery] = useState<QueryFilter>(QueryFilter.All);
+
+  const headerInputRef = useRef<HTMLInputElement>(null);
+  const editingInputRef = useRef<HTMLInputElement>(null);
+
+  const filteredTodos = useMemo(() => {
+    return todos.filter(todo => {
+      switch (query) {
+        case QueryFilter.Active:
+          return !todo.completed;
+
+        case QueryFilter.Completed:
+          return todo.completed;
+
+        default:
+          return todo;
+      }
+    });
+  }, [todos, query]);
+
+  // #region Manage focus
+  useEffect(() => {
+    if (editTodo) {
+      editingInputRef.current?.focus();
+    }
+  }, [editTodo]);
+
+  const headerFocus = useCallback(() => {
+    headerInputRef.current?.focus();
+  }, []);
+
+  useEffect(() => {
+    headerInputRef.current?.focus();
+  }, []);
+  // #endregion
+
+  // #region LocalStorage Store Todos
+  useEffect(() => {
+    const todoStorage = localStorage.getItem(STORAGE_KEY);
+
+    headerInputRef.current?.focus();
+
+    if (todoStorage) {
+      setTodos(JSON.parse(todoStorage));
+    }
+  }, []);
+
+  useEffect(() => {
+    localStorage.setItem(STORAGE_KEY, JSON.stringify(todos));
+  }, [todos]);
+
+  // #endregion
+
+  // #region variable of Todos
+  const isAllTodosCompleted = useMemo(() => {
+    return todos.every(todo => todo.completed);
+  }, [todos]);
+
+  const isSomeTodosCompleted = useMemo(() => {
+    return todos.some(todo => todo.completed);
+  }, [todos]);
+
+  const todoLeft = useMemo(() => {
+    return todos.filter(todo => !todo.completed).length;
+  }, [todos]);
+
+  const removeAllCompletedTodos = useCallback(() => {
+    headerFocus();
+    setTodos(currentTodos => currentTodos.filter(todo => !todo.completed));
+  }, []);
+
+  // #endregion
+
+  // #region useCallback Todos
+  const addTodo = useCallback((todo: Todo) => {
+    setTodos(currentTodos => [...currentTodos, todo]);
+    headerFocus();
+  }, []);
+
+  const toggleAllTodos = useCallback(() => {
+    setTodos(currentTodos => {
+      return currentTodos.map(todo => {
+        return { ...todo, completed: !isAllTodosCompleted };
+      });
+    });
+  }, [isAllTodosCompleted]);
+
+  const deleteTodo = useCallback((todoId: number) => {
+    setTodos(currentTodos => currentTodos.filter(todo => todo.id !== todoId));
+    headerFocus();
+  }, []);
+
+  const toggleTodo = useCallback((todoId: number) => {
+    setTodos(currentTodos =>
+      currentTodos.map(todo =>
+        todo.id === todoId ? { ...todo, completed: !todo.completed } : todo,
+      ),
+    );
+  }, []);
+
+  const updateTodo = useCallback((newTodo: Todo) => {
+    const trimTitle = newTodo.title.trim();
+
+    if (trimTitle === '') {
+      deleteTodo(newTodo.id);
+      headerFocus();
+
+      return;
+    }
+
+    setTodos(currentTodos =>
+      currentTodos.map(todo =>
+        todo.id === newTodo.id ? { ...newTodo, title: trimTitle } : todo,
+      ),
+    );
+    headerFocus();
+  }, []);
+
+  // #endregion
+
+  return (
+    <TodoContext.Provider
+      value={
+        {
+          todos,
+          filteredTodos,
+          addTodo,
+          deleteTodo,
+          updateTodo,
+          toggleTodo,
+          headerInputRef,
+          editTodo,
+          setEditTodo,
+          removeAllCompletedTodos,
+          editingInputRef,
+          isAllTodosCompleted,
+          isSomeTodosCompleted,
+          toggleAllTodos,
+          todoLeft,
+          query,
+          setQuery,
+        } as TodoContextType
+      }
+    >
+      {children}
+    </TodoContext.Provider>
+  );
+};
+
+export function useTodos(): TodoContextType {
+  const context = useContext(TodoContext);
+
+  if (!context) {
+    throw new Error('useTodos must be used within a TodoProvider');
+  }
+
+  return context;
+}
diff --git a/src/Types/QueryFilter.ts b/src/Types/QueryFilter.ts
new file mode 100644
index 000000000..c41b83290
--- /dev/null
+++ b/src/Types/QueryFilter.ts
@@ -0,0 +1,5 @@
+export enum QueryFilter {
+  All = '',
+  Active = 'All',
+  Completed = 'Completed',
+}
diff --git a/src/Types/Todo.ts b/src/Types/Todo.ts
new file mode 100644
index 000000000..d94ea1bff
--- /dev/null
+++ b/src/Types/Todo.ts
@@ -0,0 +1,5 @@
+export type Todo = {
+  id: number;
+  title: string;
+  completed: boolean;
+};
diff --git a/src/index.tsx b/src/index.tsx
index b2c38a17a..87c6c6786 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -3,7 +3,12 @@ import { createRoot } from 'react-dom/client';
 import './styles/index.scss';
 
 import { App } from './App';
+import { TodoProvider } from './Context/TodoContext';
 
 const container = document.getElementById('root') as HTMLDivElement;
 
-createRoot(container).render(<App />);
+createRoot(container).render(
+  <TodoProvider>
+    <App />
+  </TodoProvider>,
+);
diff --git a/src/styles/todo-list.scss b/src/styles/todo-list.scss
index 4576af434..cfb34ec2f 100644
--- a/src/styles/todo-list.scss
+++ b/src/styles/todo-list.scss
@@ -71,6 +71,7 @@
   }
 
   &__title-field {
+    box-sizing: border-box;
     width: 100%;
     padding: 11px 14px;
 
diff --git a/src/styles/todoapp.scss b/src/styles/todoapp.scss
index e289a9458..fa8cb9dc0 100644
--- a/src/styles/todoapp.scss
+++ b/src/styles/todoapp.scss
@@ -56,6 +56,7 @@
   }
 
   &__new-todo {
+    box-sizing: border-box;
     width: 100%;
     padding: 16px 16px 16px 60px;
 
@@ -127,6 +128,10 @@
       text-decoration: underline;
     }
 
+    &:disabled {
+      visibility: hidden;
+    }
+    
     &:active {
       text-decoration: none;
     }