Data storage component with SASS

It looked very simple at the first sight. The main problem was how to add media query into the sass files.

Apparently not every property works like at the simple css. I used mixin with Breakpoint value=>

@mixin mobile-only { @media (max-width:#{$breakpoint-mobile}) { @content; } }

and for examples : width: 95%; // doesn't work flex-direction: column; //works

The only way I found how to apply it is to write at the EVERY selector (that I need to change for the mobile layout)

@include mobile-only {...}

It's definitely wrong, there are a lot of repetitions, but it works.

If you know how to make it more compact I would appreciate your advice