@mixin border-box-sizing {
  @if not $theme-global-border-box-sizing {
    box-sizing: border-box;

    &::after,
    &::before,
    & *,
    & *::after,
    & *::before {
      box-sizing: inherit;
    }
  }
}

@mixin this-border-box-sizing {
  @if not $theme-global-border-box-sizing {
    box-sizing: border-box;
  }
}