$btn-group-font-size: 14px !default;
$btn-group-btn-font-size: 0.9285714286em !default;
$btn-group-colour: $colour-grey-darkmid !default;
$btn-group-border-colour: $colour-grey-lightmid !default;
$btn-group-checked-background-colour: $colour-blue !default;
$btn-group-checked-border-colour: $colour-blue !default;

$toggle-button-font-size: 0.8571428571em !default;
$toggle-button-circle-width: 1.666666667em !default;
$toggle-button-circle-height: 1.666666667em !default;
$toggle-button-circle-border-width: 0.1666666667em !default;
$toggle-button-circle-offset: 0.1666666667em !default;

.btn-group {
  display: table;
  width: 100%;
  font-size: $btn-group-font-size;

  [type="radio"],
  [type="checkbox"] {
    display: inline;
    position: absolute;
    opacity: 0;
  }

  [type="radio"] + label::before,
  [type="radio"] + label::after {
    content: none;
  }

  [type="radio"]:checked + .btn {
    background: $btn-group-checked-background-colour;
    border-color: $btn-group-checked-border-colour;
    color: #fff;
  }

  .btn {
    font-size: $btn-group-btn-font-size;
    color: $btn-group-colour;
    line-height: 1;
    display: table-cell;
    padding: 0.76923em 3.07692em;
    border: 1px solid $btn-group-border-colour;
    border-radius: 0;

    &:first-of-type {
      border-top-left-radius: 0.23077em;
      border-bottom-left-radius: 0.23077em;
    }

    &:last-of-type {
      border-top-right-radius: 0.23077em;
      border-bottom-right-radius: 0.23077em;
    }
  }
}

.btn-group__toggle {
  display: table-cell;
  font-size: $toggle-button-font-size;
  font-weight: $font-weight-bold;
  vertical-align: top;

  input {
    + label {
      position: relative;
      display: inline-block;
      line-height: 2;
      border-radius: 8.333333333em;
      font-size: 1em;
      text-transform: uppercase;
      padding: 0 0.8333333333em 0 2.0833333em;
      color: $colour-grey-darkmid;
      background: $colour-grey-light;
    }

    + label::before {
      content: attr(data-off-text);
      display: inline-block;
      position: static;
      vertical-align: middle;
      width: auto;
      height: auto;
      border: 0;
    }

    + label::after {
      content: "";
      background: #fff;
      position: absolute;
      width: $toggle-button-circle-width;
      height: $toggle-button-circle-height;
      top: 50%;
      left: $toggle-button-circle-offset;
      border: $toggle-button-circle-border-width solid currentColor;
      border-radius: 50%;
      margin-top: -($toggle-button-circle-height / 2);
    }
  }

  input:checked {
    + label {
      display: inline-block;
      padding: 0 2.0833333em 0 0.8333333333em;
      color: $colour-blue;
      background: $colour-blue-light;
    }

    + label::before {
      content: attr(data-on-text);
    }

    + label::after {
      right: $toggle-button-circle-offset;
      left: auto;
    }
  }
}

.btn-group__toggle-label {
  display: table-cell;
  vertical-align: top;
  line-height: 1.3571428571;
  padding-top: 0.2142857143em;
  padding-left: 0.7142857143em;
}