
.card {
  --#{$prefix}card-spacer-y:            #{$card-spacer-y};
  --#{$prefix}card-spacer-x:            #{$card-spacer-x};
  --#{$prefix}card-border-width:        #{$card-border-width};
  --#{$prefix}card-border-color:        #{$card-border-color};
  --#{$prefix}card-border-radius:       #{$card-border-radius};
  --#{$prefix}card-box-shadow:          #{$card-box-shadow};
  --#{$prefix}card-inner-border-radius: #{$card-inner-border-radius};
  --#{$prefix}card-cap-padding-y:       #{$card-cap-padding-y};
  --#{$prefix}card-cap-padding-x:       #{$card-cap-padding-x};
  --#{$prefix}card-cap-bg:              #{$card-cap-bg};
  --#{$prefix}card-cap-color:           #{$card-cap-color};
  --#{$prefix}card-height:              #{$card-height};
  --#{$prefix}card-color:               #{$card-color};
  --#{$prefix}card-bg:                  #{$card-bg};
  --#{$prefix}card-img-overlay-padding: #{$card-img-overlay-padding};
  --#{$prefix}card-group-margin:        #{$card-group-margin};

  position:                             relative;
  display:                              flex;
  flex-direction:                       column;
  min-width:                            0; // See https://github.com/twbs/bootstrap/pull/22740#issuecomment-305868106
  height:                               var(--#{$prefix}card-height);
  color:                                var(--#{$prefix}body-color);
  word-wrap:                            break-word;
  background-color:                     var(--#{$prefix}card-bg);
  background-clip:                      border-box;
  border:                               var(--#{$prefix}card-border-width) solid var(--#{$prefix}card-border-color);
  @include border-radius(var(--#{$prefix}card-border-radius));
  @include box-shadow(var(--#{$prefix}card-box-shadow));

  > hr {
    margin-right: 0;
    margin-left:  0;
  }

  > .list-group {
    border-top:    inherit;
    border-bottom: inherit;

    &:first-child {
      border-top-width: 0;
      @include border-top-radius(var(--#{$prefix}card-inner-border-radius));
    }

    &:last-child {
      border-bottom-width: 0;
      @include border-bottom-radius(var(--#{$prefix}card-inner-border-radius));
    }
  }

  // Due to specificity of the above selector (`.card > .list-group`), we must
  // use a child selector here to prevent double borders.
  > .card-header + .list-group,
  > .list-group + .card-footer {
    border-top: 0;
  }
}

.card-body {
  // Enable `flex-grow: 1` for decks and groups so that card blocks take up
  // as much space as possible, ensuring footers are aligned to the bottom.
  flex:    1 1 auto;
  padding: var(--#{$prefix}card-spacer-y) var(--#{$prefix}card-spacer-x);
  color:   var(--#{$prefix}card-color);
}

.card-header {
  padding:          var(--#{$prefix}card-cap-padding-y) var(--#{$prefix}card-cap-padding-x);
  margin-bottom:    0; // Removes the default margin-bottom of <hN>
  color:            var(--#{$prefix}card-cap-color);
  background-color: var(--#{$prefix}card-cap-bg);
  border-bottom:    var(--#{$prefix}card-border-width) solid var(--#{$prefix}card-border-color);

  &:first-child {
    @include border-radius(var(--#{$prefix}card-inner-border-radius) var(--#{$prefix}card-inner-border-radius) 0 0);
  }
}

.card-footer {
  padding:          var(--#{$prefix}card-cap-padding-y) var(--#{$prefix}card-cap-padding-x);
  color:            var(--#{$prefix}card-cap-color);
  background-color: var(--#{$prefix}card-cap-bg);
  border-top:       var(--#{$prefix}card-border-width) solid var(--#{$prefix}card-border-color);

  &:last-child {
    @include border-radius(0 0 var(--#{$prefix}card-inner-border-radius) var(--#{$prefix}card-inner-border-radius));
  }
}
