Important Considerations:
* Readability: As you can see, having both HTML and CSS in one file can make the file quite long and harder to read, especially as your project grows.
* Maintainability: Making changes becomes more cumbersome because you have to scroll through a lot of code.
* Caching: When CSS is in a separate file, browsers can cache it, meaning it doesn't need to be downloaded every time a user visits a new page on your site. This speeds up loading times. With internal CSS, the CSS is downloaded with every HTML page.
* Image Placeholders: I've replaced the local image paths (images/logo.png, images/hero-bg.jpg, etc.) with placeholder image URLs from via.placeholder.com. For a real shop, you'd replace these with your actual image paths.
* JavaScript: The basic JavaScript for the mobile menu toggle is also included within