//

// Button groups

// --------------------------------------------------

// Make the div behave like a button

.btn-group,

.btn-group-vertical {

  position: relative;

  display: inline-block;

  vertical-align: middle; // match .btn alignment given font-size hack above

  > .btn {

    position: relative;

    float: left;

    // Bring the "active" button to the front

    &:hover,

    &:focus,

    &:active,

    &.active {

      z-index: 2;

    }

  }

}

// Prevent double borders when buttons are next to each other

.btn-group {

  .btn + .btn,

  .btn + .btn-group,

  .btn-group + .btn,

  .btn-group + .btn-group {

    margin-left: -1px;

  }

}

// Optional: Group multiple button groups together for a toolbar

.btn-toolbar {

  margin-left: -5px; // Offset the first child's margin

  &:extend(.clearfix all);

  .btn-group,

  .input-group {

    float: left;

  }

  > .btn,

  > .btn-group,

  > .input-group {

    margin-left: 5px;

  }

}

.btn-group > .btn:not(:first-child):not(:last-child):not(.dropdown-toggle) {

  border-radius: 0;

}

// Set corners individual because sometimes a single button can be in a .btn-group and we need :first-child and :last-child to both match

.btn-group > .btn:first-child {

  margin-left: 0;

  &:not(:last-child):not(.dropdown-toggle) {

    .border-right-radius(0);

  }

}

// Need .dropdown-toggle since :last-child doesn't apply given a .dropdown-menu immediately after it

.btn-group > .btn:last-child:not(:first-child),

.btn-group > .dropdown-toggle:not(:first-child) {

  .border-left-radius(0);

}

// Custom edits for including btn-groups within btn-groups (useful for including dropdown buttons within a btn-group)

.btn-group > .btn-group {

  float: left;

}

.btn-group > .btn-group:not(:first-child):not(:last-child) > .btn {

  border-radius: 0;

}

.btn-group > .btn-group:first-child {

  > .btn:last-child,

  > .dropdown-toggle {

    .border-right-radius(0);

  }

}

.btn-group > .btn-group:last-child > .btn:first-child {

  .border-left-radius(0);

}

// On active and open, don't show outline

.btn-group .dropdown-toggle:active,

.btn-group.open .dropdown-toggle {

  outline: 0;

}

// Sizing

//

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

.btn-group-xs > .btn { &:extend(.btn-xs); }

.btn-group-sm > .btn { &:extend(.btn-sm); }

.btn-group-lg > .btn { &:extend(.btn-lg); }

// Split button dropdowns

// ----------------------

// Give the line between buttons some depth

.btn-group > .btn + .dropdown-toggle {

  padding-left: 8px;

  padding-right: 8px;

}

.btn-group > .btn-lg + .dropdown-toggle {

  padding-left: 12px;

  padding-right: 12px;

}

// The clickable button for toggling the menu

// Remove the gradient and set the same inset shadow as the :active state

.btn-group.open .dropdown-toggle {

  .box-shadow(inset 0 3px 5px rgba(0,0,0,.125));

  // Show no shadow for `.btn-link` since it has no other button styles.

  &.btn-link {

    .box-shadow(none);

  }

}

// Reposition the caret

.btn .caret {

  margin-left: 0;

}

// Carets in other button sizes

.btn-lg .caret {

  border-width: @caret-width-large @caret-width-large 0;

  border-bottom-width: 0;

}

// Upside down carets for .dropup

.dropup .btn-lg .caret {

  border-width: 0 @caret-width-large @caret-width-large;

}

// Vertical button groups

// ----------------------

.btn-group-vertical {

  > .btn,

  > .btn-group,

  > .btn-group > .btn {

    display: block;

    float: none;

    width: 100%;

    max-width: 100%;

  }

  // Clear floats so dropdown menus can be properly placed

  > .btn-group {

    &:extend(.clearfix all);

    > .btn {

      float: none;

    }

  }

  > .btn + .btn,

  > .btn + .btn-group,

  > .btn-group + .btn,

  > .btn-group + .btn-group {

    margin-top: -1px;

    margin-left: 0;

  }

}

.btn-group-vertical > .btn {

  &:not(:first-child):not(:last-child) {

    border-radius: 0;

  }

  &:first-child:not(:last-child) {

    border-top-right-radius: @border-radius-base;

    .border-bottom-radius(0);

  }

  &:last-child:not(:first-child) {

    border-bottom-left-radius: @border-radius-base;

    .border-top-radius(0);

  }

}

.btn-group-vertical > .btn-group:not(:first-child):not(:last-child) > .btn {

  border-radius: 0;

}

.btn-group-vertical > .btn-group:first-child:not(:last-child) {

  > .btn:last-child,

  > .dropdown-toggle {

    .border-bottom-radius(0);

  }

}

.btn-group-vertical > .btn-group:last-child:not(:first-child) > .btn:first-child {

  .border-top-radius(0);

}

// Justified button groups

// ----------------------

.btn-group-justified {

  display: table;

  width: 100%;

  table-layout: fixed;

  border-collapse: separate;

  > .btn,

  > .btn-group {

    float: none;

    display: table-cell;

    width: 1%;

  }

  > .btn-group .btn {

    width: 100%;

  }

  > .btn-group .dropdown-menu {

    left: auto;

  }

}

// Checkbox and radio options

//

// In order to support the browser's form validation feedback, powered by the

// `required` attribute, we have to "hide" the inputs via `clip`. We cannot use

// `display: none;` or `visibility: hidden;` as that also hides the popover.

// Simply visually hiding the inputs via `opacity` would leave them clickable in

// certain cases which is prevented by using `clip` and `pointer-events`.

// This way, we ensure a DOM element is visible to position the popover from.

//

// See https://github.com/twbs/bootstrap/pull/12794 and

// https://github.com/twbs/bootstrap/pull/14559 for more information.

[data-toggle="buttons"] {

  > .btn,

  > .btn-group > .btn {

    input[type="radio"],

    input[type="checkbox"] {

      position: absolute;

      clip: rect(0,0,0,0);

      pointer-events: none;

    }

  }

}