style: added some responsive. Styled game-over-popup. Little refactor. Added <div id="#root"> wrapper.

Only the styles have been changed. The logic of the game was not affected. Also, a visual bug with overlapping in case of insufficient screen height was fixed.

There are many changes shown in html content simply because I added <div id="#root"> wrapper. Nothing else actually was changed. I added this only because many chrome extensions (I have 2 of those) try to manipulate the <body> attributes and thus remove the class from it.

Feel free to comment if there is something you don't like there

CombustibleToast / StratagemHeroOnline

style: added some responsive. Styled game-over-popup. Little refactor. Added <div id="#root"> wrapper. #23