// Button groups
// *******************************************************************************

.btn-group {
  --#{$prefix}btn-group-border-radius: #{$btn-border-radius};

  &.btn-group-sm {
    --#{$prefix}btn-group-border-radius: #{$btn-border-radius-sm};
  }
  &.btn-group-xs {
    --#{$prefix}btn-group-border-radius: #{$btn-border-radius-xs};
  }
  &.btn-group-lg {
    --#{$prefix}btn-group-border-radius: #{$btn-border-radius-lg};
  }
  &.btn-group-xl {
    --#{$prefix}btn-group-border-radius: #{$btn-border-radius-xl};
  }

  > :not(.btn-check:first-child) + .btn,
  > .btn-group:not(:first-child) {
    margin: 0;
    margin-inline-start: calc(#{$btn-border-width} * -1);
  }
  &:not(.btn-group-vertical) {

    > .btn:not(:last-child):not(.dropdown-toggle),
    > .btn.dropdown-toggle-split:first-child,
    > .btn-group:not(:last-child) > .btn,
    > .btn:nth-child(n + 3),
    > :not(.btn-check) + .btn,
    > .btn-group:not(:first-child) > .btn {
      @include border-radius(var(--#{$prefix}btn-group-border-radius));
    }

    > .btn:not(:last-child):not(.dropdown-toggle),
    > .btn.dropdown-toggle-split:first-child,
    > .btn-group:not(:last-child) > .btn {
      border-end-end-radius: 0 !important;
      border-start-end-radius: 0 !important;
    }

    > .btn:nth-child(n + 3),
    > :not(.btn-check) + .btn,
    > .btn-group:not(:first-child) > .btn {
      border-end-start-radius: 0 !important;
      border-start-start-radius: 0 !important;
    }
  }

  &.btn-group-vertical {
    > :not(.btn-check:first-child) + .btn,
    > .btn-group:not(:first-child) {
      margin: 0;
      margin-block-start: calc(#{$btn-border-width} * -1);
    }
    .btn:not([class*="btn-outline-"]) {
      border-inline-color: var(--#{$prefix}btn-bg);
      &:hover {
        border-inline-color: var(--#{$prefix}btn-hover-bg);
      }
    }
    > .btn:first-child,
    > .btn.dropdown-toggle-split:first-child,
    > .btn-group:first-child > .btn {
      @include border-top-radius(var(--#{$prefix}btn-group-border-radius));
    }
    > .btn:last-child,
    > .btn.dropdown-toggle-split:last-child,
    > .btn-group:last-child > .btn {
      @include border-bottom-radius(var(--#{$prefix}btn-group-border-radius));
    }
  }
}

// Split button
// *******************************************************************************

.dropdown-toggle-split,
.btn-lg + .dropdown-toggle-split,
.btn-group-lg > .btn + .dropdown-toggle-split,
.input-group-lg .btn + .dropdown-toggle-split,
.btn-xl + .dropdown-toggle-split,
.btn-group-xl > .btn + .dropdown-toggle-split {
  padding-inline: .92em;
}

.btn-sm + .dropdown-toggle-split,
.btn-group-sm > .btn + .dropdown-toggle-split,
.input-group-sm .btn + .dropdown-toggle-split {
  padding-inline: .6em;
}

.btn-xs + .dropdown-toggle-split,
.btn-group-xs > .btn + .dropdown-toggle-split {
  padding-inline: .5em;
}

// Sizing
// *******************************************************************************

.btn-group-xs > .btn {
  @extend .btn-xs;
}

.btn-group-xl > .btn {
  @extend .btn-xl;
}

/* Button groups border */

.btn-group:not(.btn-group-vertical) > .btn-group:first-child > .btn:not([class*="btn-outline-"]):first-child,
.input-group > .btn:not([class*="btn-outline-"]):first-child,
:not(.btn-group, .input-group) > .btn-group:not(.btn-group-vertical) > .btn:not([class*="btn-outline-"]):first-child,
.input-group > .btn-group:first-child > .btn:not([class*="btn-outline-"]):first-child {
  border-inline-start-color: transparent;
}

.btn-group:not(.btn-group-vertical) > .btn-group:last-child > .btn:not([class*="btn-outline-"]):last-of-type,
.input-group > .btn:not([class*="btn-outline-"]):last-of-type,
:not(.btn-group, .input-group) > .btn-group:not(.btn-group-vertical) > .btn:not([class*="btn-outline-"]):last-of-type,
.input-group > .btn-group:last-child > .btn:not([class*="btn-outline-"]):last-of-type {
  border-inline-end-color: transparent;
}

.btn-group-vertical > .btn-group-vertical:first-child > .btn:not([class*="btn-outline-"]):first-child,
:not(.btn-group-vertical, .input-group) > .btn-group-vertical > .btn:not([class*="btn-outline-"]):first-child {
  border-block-start-color: transparent;
}

.btn-group-vertical > .btn-group-vertical:last-child > .btn:not([class*="btn-outline-"]):last-of-type,
:not(.btn-group-vertical, .input-group) > .btn-group-vertical > .btn:not([class*="btn-outline-"]):last-of-type {
  border-block-end-color: transparent;
}