used flexbox

When i say i struggled with trying to get my background images to position a certain way across all media screen!! And then i came across Bryan Li's solution and how he tackled that so that helped solve that. Butttttt, when i view my page on my mobile phone, the border radius at the top of my top-image disappears and i see a straight border instead and my top image seperates from my profile card. Alsoooooo, when i view my page on screen rotate horizontally, the top image size reduces upto half of the profile card.