Single Price Grid Component (HTML + CSS)

Hello community,

Thank your for reaching into my challenge. It is very important for me to count on your expertise in order to improve in my coding career.

I have two questions regarding this challenge:

1. How can I change the positioning of elements like the ones in the footer part of the component, to convert into a column instead of a row without the use of media queries?

2. I have a doubt regarding the "Sign Up" element. Should it be a button or an <a> tag with padding. I watched a video on youtube long time ago but still doubt what is the correct way. I think it is an <a> if it links to another thing and it is a <button> if it sends or retrieves something.

Once again thank you for passing by.

Have a nice day