each(@breakpoints-min, .(@px, @breakpoint) {
  @media (min-width: @px) {
    each(range(@s-min-font-size, @s-max-font-size, @s-increment-font), .(@loop) {
      .@{breakpoint}\:fs-@{loop} {
        font-size: (@loop/@s-body-font-size) * 1rem !important;
      }
    })
  }
})