Apply Custom CSS to newsletter

I have replaced the default subscribe form of the theme to the form in eNewsletter. Please advise CSS to make it look like before:

https://cdn.livechat-static.com/api/file/v2/lc/att-old/8801096/0d6a12faff48b30c7ea2363911a2d78d/Screenshot%202019-03-01%2020.39.15.png

Also, replace the “Stay in Touch” form in the footer with the eNewseletter, with CSS.

Please check chat notes for more info.