nova-ui/assets/styles/_breakpoints.scss

$breakpoints: (
  'xs': (
    min-width: 22.5em,
  ),
  //360,
  'xsm': (
    min-width: 32.5em,
  ),
  //520,
  'sm': (
    min-width: 48em,
  ),
  //768,
  'md': (
    min-width: 64em,
  ),
  //1024,
  'lg': (
    min-width: 76.5em,
  ),
  //1224,
  'xl': (
    min-width: 90em,
  ),
  //1440,
  'xxl': (
    min-width: 240em,
  ),
  //3840,
) !default;

@mixin media($breakpoint) {
  @if map-has-key($breakpoints, $breakpoint) {
    @media #{inspect(map-get($breakpoints, $breakpoint))} {
      @content;
    }
  } @else {
    @warn "Unfortunately, no value could be retrieved from `#{$breakpoint}`. "
        + "Available breakpoints are: #{map-keys($breakpoints)}.";
  }
}