How do i make changes to mobile only?

[benjamids]

Hello,

I would like to make changes to my mobile store only and leave desktop how it is. How would I go about saving changes only on mobile device? Can anybody please help? Specifically I would like to change the custom content sections so that it is directly centered on mobile as well as desktop.

My theme is impulse

my url: naturalvitaminsusa.com

[benjamids]

This is how it looks on desktop. And this is how it looks on mobile.

[benjamids]

I am just launching. Do you know how to make my custom content centered. I believe that will solve mt problem. Below I attached an image of what I mean.