Product detail page - image really big & header cut off

Hi there

I've added a downloadable product to my website (7.0) - the store page looks okay, but when you click on the product to go to the product detail page, the font is really big, as are the images. The top of the page is also cut off.

The cart page also cuts off the top (second image)

Anyone have a solution for this?

Thanks

Jessica

Can you share link to this product? We can check easier