@mixin button-variant($background, $border, $hover-background: darken($background, 7.5%), $hover-border: darken($border, 10%), $active-background: darken($background, 10%), $active-border: darken($border, 12.5%)) {
  color: color-yiq($background);
  background-color: $background;
  border-color: $border;

  @if $enable-button-box-shadows {
    @include box-shadow(0, 2px, 8px, lighten($background, 30%));
  }

  &:hover,
  &:focus {
    color: color-yiq($hover-background);
    background-color: $hover-background;
    border-color: $hover-border;

    @if $enable-button-box-shadows {
      @include box-shadow(0, 2px, 16px, lighten($background, 30%));
    }
  }

  &:disabled {
    color: color-yiq($background);
    background-color: $background;
    border-color: $border;
  }
  &:not(:disabled):active {
    color: color-yiq($active-background);
    background-color: $active-background;
    border-color: $active-border;

    @if $enable-button-box-shadows {
      @include box-shadow(0, 2px, 16px, lighten($background, 30%));
    }
  }
}

@mixin button-border-variant($color, $color-hover: color-yiq($color), $active-background: $color, $active-border: $color) {
  color: $color;
  border-color: $color;

  &:hover, &:focus {
    color: $color-hover;
    background-color: $active-background;
    border-color: $active-border;
  }

  &:disabled {
    color: $color;
    background-color: transparent;
  }

  &:not(:disabled):active {
    color: color-yiq($active-background);
    background-color: $active-background;
    border-color: $active-border;
  }
}