HTML attributes should always be inside the opening tag of the element to which they apply, not between the opening and closing tag (as your attribute is).
Also, this div element should have the main element (and all elements within it) nested inside it. To achieve this, the opening div tag should come immediately below the opening body tag, and the closing div tag should come immediately above the closing body tag.
It is great that you solved the challenge, but instead of posting your full working solution, it is best to stay focused on answering the original poster’s question(s) and help guide them with hints and suggestions to solve their own issues with the challenge.
We are trying to cut back on the number of spoiler solutions found on the forum and instead focus on helping other campers with their questions and definitely not posting full working solutions.