Sass: how to declare a variable for two @media values?

Question

css

I 'm stupid to impossibility, tell me, please, how to correctly declare and call a variable in Sass:
I want to write this into a variable, let's say $middle_min-max

(min-width: $screen-md-min) and (max-width: $screen-md-max)

I smoked all the manuals, in SCSS it seems to be easy, but in Sass I can't find the correct syntax...

Answer 1

$screen-md-min: 768px
$screen-md-max: 960px

$middle_min-max: "(min-width:" $screen-md-min + ") and (max-width:" + $screen-md-max + ")"

@media #{$middle_min-max}
  color: red