.btn {
  @include button-size($btn-padding-y, $btn-padding-x, $btn-font-size, $btn-line-height, $border-radius);
  // font-size: $btn-font-size-base;

  // Size variations
  &.btn-xs,
  .btn-group-xs & {
    @include button-size($btn-padding-y-xs, $btn-padding-x-xs, $btn-font-size-xs, $btn-line-height-xs, $border-radius-xs);
    // font-size: $btn-font-size-xs;
  }
  &.btn-sm,
  .btn-group-sm & {
    @include button-size($btn-padding-y-sm, $btn-padding-x-sm, $btn-font-size-sm, $btn-line-height-sm, $border-radius-sm);
    // font-size: $btn-font-size-sm;
  }
  &.btn-lg,
  .btn-group-lg & {
    @include button-size($btn-padding-y-lg, $btn-padding-x-lg, $btn-font-size-lg, $btn-line-height-lg, $border-radius-lg);
    // font-size: $btn-font-size-lg;
  }
  &.btn-xl,
  .btn-group-xl & {
    @include button-size($btn-padding-y-xl, $btn-padding-x-xl, $btn-font-size-xl, $btn-line-height-xl, $border-radius-xl);
    // font-size: $btn-font-size-xl;
  }
}