/*!markdown

---
title: 背景色
---

| Class       | Properties               |
| ----------- | ------------------------ |
| bg-transparent | background: transparent |
| bg-none | background: none !important |
| bg-transparent | background: transparent |
| bg-current | background: currentColor |
| bg-black | background: #000 |
| bg-white | background: #fff |
| bg-primary | background: #007bff |
| bg-secondary | background: #6c757d |
| bg-success | background: #28a745 |
| bg-info | background: #17a2b8 |
| bg-warning | background: #28a745 |
| bg-danger | background: #dc3545 |
| bg-light | background: #f8f9fa |
| bg-dark | background: #343a40 |
| bg-gray-transparent | background: transparent |
| bg-gray-current | background: currentColor |
| bg-gray-50 | background: #f9fafb |
| bg-gray-100 | background: #f3f4f6 |
| bg-gray-200 | background: #e5e7eb |
| bg-gray-300 | background: #d1d5db |
| bg-gray-400 | background: #9ca3af |
| bg-gray-500 | background: #6b7280 |
| bg-gray-600 | background: #4b5563 |
| bg-gray-700 | background: #374151 |
| bg-gray-800 | background: #1f2937 |
| bg-gray-900 | background: #111827 |
| bg-red-transparent | background: transparent |
| bg-red-current | background: currentColor |
| bg-red-50 | background: #fef2f2 |
| bg-red-100 | background: #fee2e2 |
| bg-red-200 | background: #fecaca |
| bg-red-300 | background: #fca5a5 |
| bg-red-400 | background: #f87171 |
| bg-red-500 | background: #ef4444 |
| bg-red-600 | background: #dc2626 |
| bg-red-700 | background: #b91c1c |
| bg-red-800 | background: #991b1b |
| bg-red-900 | background: #7f1d1d |
| bg-yellow-transparent | background: transparent |
| bg-yellow-current | background: currentColor |
| bg-yellow-50 | background: #fffbeb |
| bg-yellow-100 | background: #fef3c7 |
| bg-yellow-200 | background: #fde68a |
| bg-yellow-300 | background: #fcd34d |
| bg-yellow-400 | background: #fbbf24 |
| bg-yellow-500 | background: #f59e0b |
| bg-yellow-600 | background: #d97706 |
| bg-yellow-700 | background: #b45309 |
| bg-yellow-800 | background: #92400e |
| bg-yellow-900 | background: #78350f |
| bg-green-transparent | background: transparent |
| bg-green-current | background: currentColor |
| bg-green-50 | background: #ecfdf5 |
| bg-green-100 | background: #d1fae5 |
| bg-green-200 | background: #a7f3d0 |
| bg-green-300 | background: #6ee7b7 |
| bg-green-400 | background: #34d399 |
| bg-green-500 | background: #10b981 |
| bg-green-600 | background: #059669 |
| bg-green-700 | background: #047857 |
| bg-green-800 | background: #065f46 |
| bg-green-900 | background: #064e3b |
| bg-blue-transparent | background: transparent |
| bg-blue-current | background: currentColor |
| bg-blue-50 | background: #eff6ff |
| bg-blue-100 | background: #dbeafe |
| bg-blue-200 | background: #bfdbfe |
| bg-blue-300 | background: #93c5fd |
| bg-blue-400 | background: #60a5fa |
| bg-blue-500 | background: #3b82f6 |
| bg-blue-600 | background: #2563eb |
| bg-blue-700 | background: #1d4ed8 |
| bg-blue-800 | background: #1e40af |
| bg-blue-900 | background: #1e3a8a |
| bg-cyan-transparent | background: transparent |
| bg-cyan-current | background: currentColor |
| bg-cyan-50 | background: #ecfeff |
| bg-cyan-100 | background: #cffafe |
| bg-cyan-200 | background: #a5f3fc |
| bg-cyan-300 | background: #67e8f9 |
| bg-cyan-400 | background: #22d3ee |
| bg-cyan-500 | background: #06b6d4 |
| bg-cyan-600 | background: #0891b2 |
| bg-cyan-700 | background: #0e7490 |
| bg-cyan-800 | background: #155e75 |
| bg-cyan-900 | background: #164e63 |
| bg-indigo-transparent | background: transparent |
| bg-indigo-current | background: currentColor |
| bg-indigo-50 | background: #eef2ff |
| bg-indigo-100 | background: #e0e7ff |
| bg-indigo-200 | background: #c7d2fe |
| bg-indigo-300 | background: #a5b4fc |
| bg-indigo-400 | background: #818cf8 |
| bg-indigo-500 | background: #6366f1 |
| bg-indigo-600 | background: #4f46e5 |
| bg-indigo-700 | background: #4338ca |
| bg-indigo-800 | background: #3730a3 |
| bg-indigo-900 | background: #312e81 |
| bg-purple-transparent | background: transparent |
| bg-purple-current | background: currentColor |
| bg-purple-50 | background: #f5f3ff |
| bg-purple-100 | background: #ede9fe |
| bg-purple-200 | background: #ddd6fe |
| bg-purple-300 | background: #c4b5fd |
| bg-purple-400 | background: #a78bfa |
| bg-purple-500 | background: #8b5cf6 |
| bg-purple-600 | background: #7c3aed |
| bg-purple-700 | background: #6d28d9 |
| bg-purple-800 | background: #5b21b6 |
| bg-purple-900 | background: #4c1d95 |
| bg-pink-transparent | background: transparent |
| bg-pink-current | background: currentColor |
| bg-pink-50 | background: #fdf2f8 |
| bg-pink-100 | background: #fce7f3 |
| bg-pink-200 | background: #fbcfe8 |
| bg-pink-300 | background: #f9a8d4 |
| bg-pink-400 | background: #f472b6 |
| bg-pink-500 | background: #ec4899 |
| bg-pink-600 | background: #db2777 |
| bg-pink-700 | background: #be185d |
| bg-pink-800 | background: #9d174d |
| bg-pink-900 | background: #831843 |

还有 hover、active、focus、disabled 扩展，比如 `hover:bg-black`

*/

@mixin bg-colors-map(
  $colors: $colors,
  $namePrefix: '',
  $prefix: '.',
  $suffix: ''
) {
  #{$prefix}bg#{$namePrefix}-transparent#{$suffix} {
    background: transparent;
  }

  #{$prefix}bg#{$namePrefix}-current#{$suffix} {
    background: currentColor;
  }

  @each $name, $color in $colors {
    @if (is-map($color)) {
      @include bg-colors-map($color, #{'-' + $name}, $prefix, $suffix);
    } @else if $suffix == '.is-active' {
      #{$prefix}bg#{$namePrefix}-#{'' + $name}.is-active,
      #{$prefix}bg#{$namePrefix}-#{'' + $name}:active {
        background: $color;
      }
    } @else if $suffix == '.is-disabled' {
      #{$prefix}bg#{$namePrefix}-#{'' + $name}.is-disabled,
      #{$prefix}bg#{$namePrefix}-#{'' + $name}:disabled {
        background: $color;
      }
    } @else {
      #{$prefix}bg#{$namePrefix}-#{'' + $name}#{$suffix} {
        background: $color;
      }
    }
  }
}

@mixin bg-colors($prefix: '.', $suffix: '') {
  #{$prefix}bg-transparent#{$suffix} {
    background: transparent;
  }
  #{$prefix}bg-none#{$suffix} {
    background: none !important;
  }
  @include bg-colors-map($colors, '', $prefix, $suffix);
}

@include bg-colors();
@include bg-colors('.' + selector-escape('hover:'), ':hover');
@include bg-colors('.' + selector-escape('active:'), '.is-active');
@include bg-colors('.' + selector-escape('focus:'), ':focus');
@include bg-colors('.' + selector-escape('disabled:'), '.is-disabled');
@include bg-colors('.group:hover .' + selector-escape('group-hover:'));

@each $deivce in map-keys($devices) {
  @include media-device($deivce) {
    @include bg-colors('.' + selector-escape($deivce + ':'));

    @include bg-colors(
      '.' + selector-escape($deivce + ':') + selector-escape('hover:'),
      ':hover'
    );
    @include bg-colors(
      '.' + selector-escape($deivce + ':') + selector-escape('active:'),
      '.is-active'
    );
    @include bg-colors(
      '.' + selector-escape($deivce + ':') + selector-escape('focus:'),
      ':focus'
    );
    @include bg-colors(
      '.' + selector-escape($deivce + ':') + selector-escape('disabled:'),
      '.is-disabled'
    );
    @include bg-colors(
      '.group:hover .' + selector-escape($deivce + ':') +
        selector-escape('group-hover:')
    );
  }
}
