@each $font-weight in $font-weights {
  .fw-#{$font-weight} {
    font-weight: $font-weight;
  }
}

@each $breakpoint-name, $breakpoint-value in $breakpoints {
  @media #{$breakpoint-value} {
    @each $font-weight in $font-weights {
      .#{$breakpoint-name}--fw-#{$font-weight} {
        font-weight: $font-weight;
      }
    }
  }
}