@charset "UTF-8";

@mixin border-box($value: null) {
  @if not & and $value == null {
    *,
    *::before,
    *::after {
      box-sizing: border-box;
    }
  } @else if & and $value == "only" {
    &,
    &::before,
    &::after {
      box-sizing: border-box;
    }
  } @else if & and $value == null {
    &,
    &::before,
    &::after,
    *,
    *::before,
    *::after {
      box-sizing: border-box;
    }
  }
}