tabler/scss/ui/forms/_form-selectgroup.scss

/*
Select group
 */
.form-selectgroup {
  display: inline-flex;
  margin: 0 -.5rem -.5rem 0;
}

.form-selectgroup-vertical {
  flex-direction: column;
}

.form-selectgroup-item {
  display: block;
  position: relative;
  flex-grow: 1;
  margin: 0 .5rem .5rem 0;
}

.form-selectgroup-input {
  position: absolute;
  top: 0;
  left: 0;
  z-index: -1;
  opacity: 0;
}

.form-selectgroup-box {
  position: relative;
  display: block;
  min-width: $input-height;
  padding: $input-btn-padding-y $input-btn-padding-x;
  font-size: $input-btn-font-size;
  line-height: $input-line-height;
  color: $text-muted;
  text-align: center;
  cursor: pointer;
  user-select: none;
  background: rgba(#fff, .064);
  border: 1px solid $input-border-color;
  border-radius: 3px;
  transition: border-color .3s, background .3s, color .3s;

  .icon:only-child {
    margin: 0 -.25rem;
  }

  &:hover {
    color: $body-color;
  }
}

.form-selectgroup-check {
  display: inline-block;
  width: $form-check-input-width;
  height: $form-check-input-width;
  border: $form-check-input-border;
  vertical-align: middle;

  .form-selectgroup-input[type="checkbox"] + .form-selectgroup-box & {
    border-radius: $form-check-input-border-radius;
  }

  .form-selectgroup-input[type="radio"] + .form-selectgroup-box & {
    border-radius: $form-check-radio-border-radius;
  }

  .form-selectgroup-input:checked + .form-selectgroup-box & {
    background-color: $form-check-input-checked-bg-color;
    background-repeat: $form-check-input-checked-bg-repeat;
    background-position: $form-check-input-checked-bg-position;
    background-size: $form-check-input-checked-bg-size;
    border-color: $form-check-input-checked-border-color;
  }

  .form-selectgroup-input[type="checkbox"]:checked + .form-selectgroup-box & {
    background-image: escape-svg($form-check-input-checked-bg-image);
  }

  .form-selectgroup-input[type="radio"]:checked + .form-selectgroup-box & {
    background-image: escape-svg($form-check-radio-checked-bg-image);
  }
}

.form-selectgroup-input:checked + .form-selectgroup-box {
  z-index: 1;
  color: $primary;
  background: rgba($primary, .04);
  border-color: $input-focus-border-color;
  box-shadow: 0 1px 1px 0 rgba($primary, .2);
}

.form-selectgroup-input:focus + .form-selectgroup-box {
  z-index: 2;
  color: $primary;
  border-color: $input-focus-border-color;
  box-shadow: $input-btn-focus-box-shadow;
}

/**
Alternate version of form select group
 */
.form-selectgroup-boxes {
  .form-selectgroup-box {
    text-align: left;
    padding: $card-spacer-x $card-spacer-y;
    color: inherit;
  }

  .form-selectgroup-box-content {
    opacity: .64;
    transition: .3s opacity;
  }

  .form-selectgroup-input:checked {
    + .form-selectgroup-box {
      color: $body-color;

      .form-selectgroup-box-content {
        opacity: 1;
      }
    }
  }
}

/**
Select group
 */
.form-selectgroup-pills {
  flex-wrap: wrap;
  align-items: flex-start;

  .form-selectgroup-item {
    flex-grow: 0;
  }

  .form-selectgroup-box {
    border-radius: 50px;
  }
}