.btn-group,
.btn-group-vertical {
  position: relative;
  display: inline-flex;
  vertical-align: middle; 
  > .btn {
    position: relative;
    flex: 1 1 auto;

            @include hover() {
      z-index: 1;
    }
    &:focus,
    &:active,
    &.active {
      z-index: 1;
    }
  }
}

.btn-toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;

  .input-group {
    width: auto;
  }
}

.btn-group {
    > .btn:not(:first-child),
  > .btn-group:not(:first-child) {
    margin-left: -$btn-border-width;
  }

    > .btn:not(:last-child):not(.dropdown-toggle),
  > .btn-group:not(:last-child) > .btn {
    @include border-right-radius(0);
  }

  > .btn:not(:first-child),
  > .btn-group:not(:first-child) > .btn {
    @include border-left-radius(0);
  }
}

//

.btn-group-sm > .btn { @extend .btn-sm; }
.btn-group-lg > .btn { @extend .btn-lg; }


//
//

.dropdown-toggle-split {
  padding-right: $btn-padding-x * .75;
  padding-left: $btn-padding-x * .75;

  &::after,
  .dropup &::after,
  .dropright &::after {
    margin-left: 0;
  }

  .dropleft &::before {
    margin-right: 0;
  }
}

.btn-sm + .dropdown-toggle-split {
  padding-right: $btn-padding-x-sm * .75;
  padding-left: $btn-padding-x-sm * .75;
}

.btn-lg + .dropdown-toggle-split {
  padding-right: $btn-padding-x-lg * .75;
  padding-left: $btn-padding-x-lg * .75;
}


.btn-group.show .dropdown-toggle {
  @include box-shadow($btn-active-box-shadow);

    &.btn-link {
    @include box-shadow(none);
  }
}


//
//

.btn-group-vertical {
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;

  > .btn,
  > .btn-group {
    width: 100%;
  }

  > .btn:not(:first-child),
  > .btn-group:not(:first-child) {
    margin-top: -$btn-border-width;
  }

    > .btn:not(:last-child):not(.dropdown-toggle),
  > .btn-group:not(:last-child) > .btn {
    @include border-bottom-radius(0);
  }

  > .btn:not(:first-child),
  > .btn-group:not(:first-child) > .btn {
    @include border-top-radius(0);
  }
}


//
//

.btn-group-toggle {
  > .btn,
  > .btn-group > .btn {
    margin-bottom: 0; 
    input[type="radio"],
    input[type="checkbox"] {
      position: absolute;
      clip: rect(0, 0, 0, 0);
      pointer-events: none;
    }
  }
}