diff --git a/src/App.tsx b/src/App.tsx
index a399287bd..34c89378b 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,156 +1,40 @@
 /* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+// #region imports
+import React, { useContext, useState } from 'react';
+import { Footer } from './components/Footer';
+import { Header } from './components/Header';
+import { TodoList } from './components/TodoList';
+import { TodosContext } from './components/TodosContext';
+import { getFilteredTodos } from './services/getFilteredTodos';
+import { FilterStatus } from './types/FilterStatus';
+// #endregion
 
 export const App: React.FC = () => {
+  const { todos } = useContext(TodosContext);
+  const sortedTodos = {
+    active: todos.filter(({ completed }) => !completed),
+    completed: todos.filter(({ completed }) => completed),
+  };
+  const [filterStatus, setFilterStatus] = useState(FilterStatus.All);
+
+  const filteredTodos = getFilteredTodos(todos, sortedTodos, filterStatus);
+
   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>
+        <Header />
 
-          {/* 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>
+        <TodoList todos={filteredTodos} />
 
-            {/* 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>
+        {todos.length > 0 && (
+          <Footer
+            sortedTodos={sortedTodos}
+            filterStatus={filterStatus}
+            onStatusChange={setFilterStatus}
+          />
+        )}
       </div>
     </div>
   );
diff --git a/src/components/Footer.tsx b/src/components/Footer.tsx
new file mode 100644
index 000000000..891e18f7d
--- /dev/null
+++ b/src/components/Footer.tsx
@@ -0,0 +1,66 @@
+// #region imports
+import cn from 'classnames';
+import { useContext } from 'react';
+import { FilterStatus } from '../types/FilterStatus';
+import { Todo } from '../types/Todo';
+import { TodosContext } from './TodosContext';
+// #endregion
+
+type Props = {
+  sortedTodos: {
+    active: Todo[];
+    completed: Todo[];
+  };
+  filterStatus: FilterStatus;
+  onStatusChange: (status: FilterStatus) => void;
+};
+
+export const Footer: React.FC<Props> = ({
+  sortedTodos,
+  filterStatus,
+  onStatusChange,
+}) => {
+  const { changeTodos } = useContext(TodosContext);
+  const { active, completed } = sortedTodos;
+  const filterLinks: {
+    [key: string]: string;
+  } = {
+    All: '#/',
+    Active: '#/active',
+    Completed: '#/completed',
+  };
+
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {`${active.length} items left`}
+      </span>
+
+      <nav className="filter" data-cy="Filter">
+        {Object.values(FilterStatus).map(status => (
+          <a
+            key={status}
+            href={filterLinks[status]}
+            className={cn('filter__link', {
+              selected: status === filterStatus,
+            })}
+            data-cy={`FilterLink${status}`}
+            onClick={() => onStatusChange(status)}
+          >
+            {status}
+          </a>
+        ))}
+      </nav>
+
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        disabled={!completed.length}
+        onClick={() => changeTodos(active)}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};
diff --git a/src/components/Header.tsx b/src/components/Header.tsx
new file mode 100644
index 000000000..0dfd8654b
--- /dev/null
+++ b/src/components/Header.tsx
@@ -0,0 +1,84 @@
+// #region imports
+import classNames from 'classnames';
+import {
+  FormEvent,
+  memo,
+  useContext,
+  useEffect,
+  useRef,
+  useState,
+} from 'react';
+import { TodosContext } from './TodosContext';
+// #endregion
+
+export const Header = memo(function Header() {
+  // #region hooks
+  const { todos, changeTodos } = useContext(TodosContext);
+  const [newTitle, setNewTitle] = useState('');
+  const titleInput = useRef<HTMLInputElement>(null);
+
+  useEffect(() => {
+    titleInput.current?.focus();
+  });
+  // #endregion
+
+  const areTodosCompleted = todos.every(todo => todo.completed);
+
+  // #region handlings
+  const handleTodosToggle = () => {
+    changeTodos(
+      todos.map(todo => ({
+        ...todo,
+        completed: !areTodosCompleted,
+      })),
+    );
+  };
+
+  const handleSubmit = (e: FormEvent) => {
+    e.preventDefault();
+
+    const trimmedTitle = newTitle.trim();
+
+    if (!trimmedTitle) {
+      return;
+    }
+
+    changeTodos([
+      ...todos,
+      {
+        id: +new Date(),
+        title: trimmedTitle,
+        completed: false,
+      },
+    ]);
+    setNewTitle('');
+  };
+  // #endregion
+
+  return (
+    <header className="todoapp__header">
+      {todos.length > 0 && (
+        <button
+          type="button"
+          className={classNames('todoapp__toggle-all', {
+            active: areTodosCompleted,
+          })}
+          onClick={handleTodosToggle}
+          data-cy="ToggleAllButton"
+        />
+      )}
+
+      <form onSubmit={handleSubmit}>
+        <input
+          ref={titleInput}
+          data-cy="NewTodoField"
+          type="text"
+          className="todoapp__new-todo"
+          placeholder="What needs to be done?"
+          value={newTitle}
+          onChange={e => setNewTitle(e.target.value)}
+        />
+      </form>
+    </header>
+  );
+});
diff --git a/src/components/TodoItem.tsx b/src/components/TodoItem.tsx
new file mode 100644
index 000000000..460a9cd66
--- /dev/null
+++ b/src/components/TodoItem.tsx
@@ -0,0 +1,132 @@
+// #region imports
+import cn from 'classnames';
+import { memo, useContext, useEffect, useRef, useState } from 'react';
+import { Todo } from '../types/Todo';
+import { TodosContext } from './TodosContext';
+// #endregion
+
+type Props = {
+  todo: Todo;
+  isEdited?: boolean;
+  onEditedChange?: (id: number | null) => void;
+};
+
+export const TodoItem: React.FC<Props> = memo(function TodoItem({ todo }) {
+  const { id, title, completed } = todo;
+
+  // #region hooks
+  const { todos, changeTodos } = useContext(TodosContext);
+  const [isEdited, setIsEdited] = useState(false);
+  const [editedTitle, setEditedTitle] = useState(title);
+  const todoDivRef = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    const startEditing = () => {
+      setIsEdited(true);
+    };
+
+    const stopEditing = (e: KeyboardEvent) => {
+      if (e.key === 'Escape') {
+        setIsEdited(false);
+        setEditedTitle(title);
+      }
+    };
+
+    const todoDiv = todoDivRef.current;
+
+    todoDiv?.addEventListener('dblclick', startEditing);
+
+    document.addEventListener('keyup', stopEditing);
+
+    return () => {
+      todoDiv?.removeEventListener('dblclick', startEditing);
+
+      document.removeEventListener('keyup', stopEditing);
+    };
+  }, [title]);
+  // #endregion
+
+  // #region handlings
+  const handleDelete = () => {
+    changeTodos(todos.filter(t => t.id !== id));
+  };
+
+  const handleEditing = (property: keyof Todo, newValue: string | boolean) => {
+    const index = todos.findIndex(t => t.id === id);
+    const newTodos = [...todos];
+
+    const editedValue =
+      typeof newValue === 'string' ? newValue.trim() : newValue;
+
+    if (editedValue === '') {
+      newTodos.splice(index, 1);
+    } else {
+      const newTodo = {
+        ...todos[index],
+        [property]: editedValue,
+      };
+
+      newTodos.splice(index, 1, newTodo);
+    }
+
+    changeTodos(newTodos);
+  };
+
+  const onSubmit = () => {
+    handleEditing('title', editedTitle);
+    setIsEdited(false);
+  };
+  // #endregion
+
+  return (
+    <div
+      ref={todoDivRef}
+      data-cy="Todo"
+      className={cn('todo', {
+        completed: completed,
+      })}
+    >
+      <label className="todo__status-label">
+        {/* eslint-disable jsx-a11y/control-has-associated-label */}
+        <input
+          data-cy="TodoStatus"
+          type="checkbox"
+          className="todo__status"
+          checked={completed}
+          onChange={e => handleEditing('completed', e.target.checked)}
+        />
+      </label>
+
+      {isEdited ? (
+        <form onSubmit={onSubmit}>
+          <input
+            data-cy="TodoTitleField"
+            type="text"
+            className="todo__title-field"
+            placeholder="Empty todo will be deleted"
+            value={editedTitle}
+            onChange={e => {
+              setEditedTitle(e.target.value);
+            }}
+            onBlur={onSubmit}
+          />
+        </form>
+      ) : (
+        <>
+          <span data-cy="TodoTitle" className="todo__title">
+            {title}
+          </span>
+
+          <button
+            type="button"
+            className="todo__remove"
+            data-cy="TodoDelete"
+            onClick={handleDelete}
+          >
+            ×
+          </button>
+        </>
+      )}
+    </div>
+  );
+});
diff --git a/src/components/TodoList.tsx b/src/components/TodoList.tsx
new file mode 100644
index 000000000..d44734181
--- /dev/null
+++ b/src/components/TodoList.tsx
@@ -0,0 +1,14 @@
+import { Todo } from '../types/Todo';
+import { TodoItem } from './TodoItem';
+
+type Props = {
+  todos: Todo[];
+};
+
+export const TodoList: React.FC<Props> = ({ todos }) => (
+  <section className="todoapp__main" data-cy="TodoList">
+    {todos.map(todo => (
+      <TodoItem todo={todo} key={todo.id} />
+    ))}
+  </section>
+);
diff --git a/src/components/TodosContext.tsx b/src/components/TodosContext.tsx
new file mode 100644
index 000000000..c9b6bd823
--- /dev/null
+++ b/src/components/TodosContext.tsx
@@ -0,0 +1,36 @@
+import React, { createContext, useMemo } from 'react';
+import { useLocalStorage } from '../hooks/useLocalStorage';
+import { Todo } from '../types/Todo';
+
+interface ContextProperty {
+  todos: Todo[];
+  changeTodos: (todos: Todo[]) => void;
+}
+
+export const TodosContext = createContext<ContextProperty>({
+  todos: new Array<Todo>(),
+  changeTodos: () => {},
+});
+
+type Props = {
+  children: React.ReactNode;
+};
+
+export const TodosProvider: React.FC<Props> = ({ children }) => {
+  const [todos, changeTodos] = useLocalStorage<Todo[]>(
+    'todos',
+    new Array<Todo>(),
+  );
+
+  const value = useMemo(
+    () => ({
+      todos,
+      changeTodos,
+    }),
+    [todos, changeTodos],
+  );
+
+  return (
+    <TodosContext.Provider value={value}>{children}</TodosContext.Provider>
+  );
+};
diff --git a/src/hooks/useLocalStorage.ts b/src/hooks/useLocalStorage.ts
new file mode 100644
index 000000000..db2595431
--- /dev/null
+++ b/src/hooks/useLocalStorage.ts
@@ -0,0 +1,29 @@
+import { useState } from 'react';
+
+export function useLocalStorage<T>(
+  itemName: string,
+  initialValue: T,
+): [T, (item: T) => void] {
+  const [item, setItem] = useState<T>(() => {
+    const data = localStorage.getItem(itemName);
+
+    if (data === null) {
+      return initialValue;
+    }
+
+    try {
+      return JSON.parse(data);
+    } catch {
+      localStorage.removeItem(itemName);
+
+      return initialValue;
+    }
+  });
+
+  const changeItem = (newItem: T) => {
+    localStorage.setItem(itemName, JSON.stringify(newItem));
+    setItem(newItem);
+  };
+
+  return [item, changeItem];
+}
diff --git a/src/index.tsx b/src/index.tsx
index a9689cb38..092259365 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -1,11 +1,17 @@
 import { createRoot } from 'react-dom/client';
 
-import './styles/index.css';
-import './styles/todo-list.css';
-import './styles/filters.css';
+import './styles/index.scss';
+import './styles/filter.scss';
+import './styles/todo.scss';
+import './styles/todoapp.scss';
 
 import { App } from './App';
+import { TodosProvider } from './components/TodosContext';
 
 const container = document.getElementById('root') as HTMLDivElement;
 
-createRoot(container).render(<App />);
+createRoot(container).render(
+  <TodosProvider>
+    <App />
+  </TodosProvider>,
+);
diff --git a/src/services/getFilteredTodos.ts b/src/services/getFilteredTodos.ts
new file mode 100644
index 000000000..c326e3b46
--- /dev/null
+++ b/src/services/getFilteredTodos.ts
@@ -0,0 +1,25 @@
+import { FilterStatus } from '../types/FilterStatus';
+import { Todo } from '../types/Todo';
+
+export function getFilteredTodos(
+  todos: Todo[],
+  sortedTodos: {
+    active: Todo[];
+    completed: Todo[];
+  },
+  filterStatus: FilterStatus,
+) {
+  let filteredTodos = [...todos];
+
+  if (filterStatus === FilterStatus.All) {
+    return filteredTodos;
+  }
+
+  if (filterStatus === FilterStatus.Completed) {
+    filteredTodos = sortedTodos.completed;
+  } else {
+    filteredTodos = sortedTodos.active;
+  }
+
+  return filteredTodos;
+}
diff --git a/src/styles/todo.scss b/src/styles/todo.scss
index 4576af434..cfb34ec2f 100644
--- a/src/styles/todo.scss
+++ b/src/styles/todo.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..434b7f6cd 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;
 
@@ -130,5 +131,9 @@
     &:active {
       text-decoration: none;
     }
+
+    &:disabled {
+      visibility: hidden;
+    }
   }
 }
diff --git a/src/types/FilterStatus.ts b/src/types/FilterStatus.ts
new file mode 100644
index 000000000..7ca17f289
--- /dev/null
+++ b/src/types/FilterStatus.ts
@@ -0,0 +1,5 @@
+export enum FilterStatus {
+  All = 'All',
+  Active = 'Active',
+  Completed = 'Completed',
+}
diff --git a/src/types/Todo.ts b/src/types/Todo.ts
new file mode 100644
index 000000000..f9e06b381
--- /dev/null
+++ b/src/types/Todo.ts
@@ -0,0 +1,5 @@
+export interface Todo {
+  id: number;
+  title: string;
+  completed: boolean;
+}