Custom class for each Screen size

Please excuse my learning stage here, I am having an issue showing a team bloc when in tablet view, the text and images bunch up, I am still learning the custom class manager at the moment so do I lets say for example:

Shall I make one custom class - team-img and change the size or make a custom class for each screen size so it would be like:

team-img-desktop
team-img-tablet
team-img-phone

Also would this be the way to do it for other items ? and would would be the right way to import text,as could there be a format problem form word or such.

Hope this makes sense ?

Cheers

Chris

I have sorted the issue,but it would be great if the Brics was permanently open so you didn’t have to click on and off.

Cheers all