// Make the div behave like a button .btn-group, .btn-group-vertical {

position: relative;
display: inline-flex;
vertical-align: middle; // match .btn alignment given font-size hack above

> .btn {
  position: relative;
  flex: 1 1 auto;
}

// Bring the hover, focused, and "active" buttons to the front to overlay
// the borders properly
> .btn-check:checked + .btn,
> .btn-check:focus + .btn,
> .btn:hover,
> .btn:focus,
> .btn:active,
> .btn.active {
  z-index: 1;
}

}

// Optional: Group multiple button groups together for a toolbar .btn-toolbar {

display: flex;
flex-wrap: wrap;
justify-content: flex-start;

.input-group {
  width: auto;
}

}

.btn-group {

// Prevent double borders when buttons are next to each other
> .btn:not(:first-child),
> .btn-group:not(:first-child) {
  margin-left: -$btn-border-width;
}

// Reset rounded corners
> .btn:not(:last-child):not(.dropdown-toggle),
> .btn-group:not(:last-child) > .btn {
  @include border-end-radius(0);
}

// The left radius should be 0 if the button is:
// - the "third or more" child
// - the second child and the previous element isn't `.btn-check` (making it the first child visually)
// - part of a btn-group which isn't the first child
> .btn:nth-child(n + 3),
> :not(.btn-check) + .btn,
> .btn-group:not(:first-child) > .btn {
  @include border-start-radius(0);
}

}

// Sizing // // Remix the default button sizing classes into new ones for easier manipulation.

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

// // Split button dropdowns //

.dropdown-toggle-split {

padding-right: $btn-padding-x * .75;
padding-left: $btn-padding-x * .75;

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

.dropstart &::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;

}

// The clickable button for toggling the menu // Set the same inset shadow as the :active state .btn-group.show .dropdown-toggle {

@include box-shadow($btn-active-box-shadow);

// Show no shadow for `.btn-link` since it has no other button styles.
&.btn-link {
  @include box-shadow(none);
}

}

// // Vertical button groups //

.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;
}

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

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

}