Certainly. Here's a single HTML file that incorporates all the changes we discussed, including the calendar view and improved formatting for the todo list items: ```html Advanced To-Do List App

Advanced To-Do List

App Guide

  • Add a Task

    Enter task details and click "Add Task".

  • Complete a Task

    Click on the task text to toggle completion.

  • Delete a Task

    Click the "Delete" button to remove a task.

  • Search Tasks

    Use the search input to filter tasks.

  • Sort Tasks

    Use the dropdown to sort tasks by different criteria.

  • Dark Mode

    Toggle dark mode for a different visual style.

``` This single file includes all the HTML, CSS, and JavaScript needed for the enhanced todo list app with the following features: 1. A tab structure for switching between list and calendar views 2. Improved formatting for todo list items 3. A calendar view using FullCalendar 4. Dark mode toggle 5. Sorting and searching functionality 6. Responsive design using Bootstrap You can save this as an HTML file and open it directly in a web browser. The app will work as a standalone application, storing todos in the browser's local storage.