///
/// Dimension by HTML5 UP
/// html5up.net | @ajlkn
/// Free for personal and commercial use under the CCA 3.0 license (html5up.net/license)
///

/* BG */

#bg {
  @include vendor('transform', 'scale(1.0)');
  -webkit-backface-visibility: hidden;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  z-index: 1;

  &:before,
  &:after {
    content: '';
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }

  &:before {
    @include vendor(
      'transition',
      'background-color #{_duration(bg)} ease-in-out'
    );
    @include vendor('transition-delay', '#{_duration(intro)}');
    background-image: linear-gradient(
        to top,
        #{_palette(bg-overlay)},
        #{_palette(bg-overlay)}
      ),
      url('../../images/overlay.png');
    background-size: auto, 256px 256px;
    background-position: center, center;
    background-repeat: no-repeat, repeat;
    z-index: 2;
  }

  &:after {
    @include vendor('transform', 'scale(1.125)');
    @include vendor(
      'transition',
      (
        'transform #{_duration(article)} ease-in-out',
        'filter #{_duration(article)} ease-in-out'
      )
    );
    background-image: url('../../images/bg.jpg');
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    z-index: 1;
  }

  .body.is-article-visible & {
    &:after {
      @include vendor('transform', 'scale(1.0825)');
      // @include vendor('filter', 'blur(0.2rem)');
    }
  }

  .body.is-loading & {
    &:before {
      background-color: _palette(bg-alt);
    }
  }
}
