Article preview component

I have four big concerns in this challenge:

1. Is there a better way to locate the social modal in desktop viewport other than translating with big percentages?
2. Talking about the HTML code, I don't know if the approach of the footers is correctly.
3. In the desktop viewport I don't know how to do the bottom "spike" of the social links.
4. When I try to resize the window from mobile to desktop with the social modal open, the person info do not show and when I try to resize from desktop to mobile both footers appears but when you try to share both dissapear.

If you know how to fix any of these problems I would really appreciate your feedback.