Is that page supposed to have weird black rectangular backgrounds in places[1][2]? Is that just design I don't understand or is it a bug? [1]: https://i.imgur.

Is that page supposed to have weird black rectangular backgrounds in places[1][2]? Is that just design I don't understand or is it a bug? [1]: https://i.imgur.com/PGdyt1c.jpg https://i.imgur.com/PGdyt1c.jpg [2]: https://i.imgur.com/AXLi4Yu.jpg https://i.imgur.com/AXLi4Yu.jpg