Book Store Web App
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Description:
A simple web app that loads book data from books.xml, displays them, supports search/filter/sort, adds items to a cart, and persists the cart with localStorage.

Files:
- index.html: Main page
- styles.css: Styling
- script.js: JavaScript logic (AJAX, DOM, cart, localStorage)
- books.xml: Data source
- README.txt: Project overview and instructions

How to run:
1. Open the folder in VS Code.
2. Right-click index.html -> "Open with Live Server".
3. Use the search, category, and sort controls.
4. Add books to cart and open the cart (🛒) to manage items.

Notes:
- If fetching books.xml fails, run via Live Server or host files on an HTTP server.
- Validate books.xml with XMLGrid.net if parse errors occur.