energylink/public/sass/components/_switch.scss

$switch-border-radius: 1rem;
$switch-width: 3.5rem;
$switch-height: 1.5rem;

/* ============================================================
  SWITCH 3 - YES NO
============================================================ */

.gf-form-switch {
  position: relative;
  max-width: 4.5rem;
  flex-grow: 1;
  min-width: 4.0rem;

  input {
    position: absolute;
    margin-left: -9999px;
    visibility: hidden;
    display: none;
  }

  input + label {
    display: block;
    position: relative;
    cursor: pointer;
    outline: none;
    user-select: none;
    width: 100%;
    height: 2.65rem;
    background-color: $page-bg;
  }

  input + label:before, input + label:after {
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    color: #fff;
    font-size: $font-size-sm;
    text-align: center;
    line-height: 2.6rem;
  }

  input + label:before {
    @include buttonBackground($input-bg, lighten($input-bg, 5%));
    content: attr(data-off);
    transition: transform 0.5s;
    backface-visibility: hidden;
  }

  input + label:after {
    @include buttonBackground($btn-secondary-bg, $btn-secondary-bg-hl);
    content: attr(data-on);
    transition: transform 0.5s;
    transform: rotateY(180deg);
    backface-visibility: hidden;
  }

  input:checked + label:before {
    transform: rotateY(180deg);
  }

  input:checked + label:after {
    transform: rotateY(0);
  }
}