Responsive styling in ShortStack

I'm looking to appropriately style my ad for each device size. Normally this would be achieved using media queries. I am wondering if there is a way I can say, apply these styles for 1020, these for 768, these for 480, etc. Using other software, if I were to switch to mobile view and style there, those styles would only be applied to mobile. Is there a way that this can be done?

Original post by Megan Maybee