desktop first responsive page using flex and custom properties

Hey!! There's a small problem if anyone could help me out...when I deploy my page trhu live server in vs code it behaves the way I want it to, but as soon as I deploy it through my git pages it shows some unwanted changes.. Like here my third column's content are not aligned with other two , I dont know why that happens ,there's that , apart from that I think I've done a decent job...any help would be great