Hi, eliasnohra. Welcome to the forums.
The code that you have posted does not look like normal CSS. Could it be SASS? In any event, we need to see the HTML and normal CSS to troubleshoot the problem. The image dimensions should be included in the width and height attributes of foreground images.
You should have the viewport meta tag in the <head> of your page.
<meta name="viewport" content="width=device-width, initial-scale=1.0">
If you have not done so, please read the forum’s posing guidelines here: