.product .field--name-variations .form-actions {
  bottom: 3rem;
  left: 1rem;
  margin: 0 0 1.25rem;
  max-width: calc(100% - 2rem);
  position: fixed;
  width: 100%;
  z-index: 99;
}

.product-detail--item {}
.product-detail--item.active {}
.product-detail--header {
  background-color: rgba(0, 0, 0, .03);
  border-bottom: 1px solid rgba(0, 0, 0, .125);
  color: #39561e;
  cursor: pointer;
  font-size: 1.25rem;
  padding: .75rem 1.25rem;
}
.product-detail--content {
  border: 1px solid rgba(0, 0, 0, .125);
  display: none;
  padding: 1.25rem;
}
.product-detail--item.active .product-detail--content {
  display: block;
}

@media screen and (min-width: 991px) {
  .product .field--name-variations .form-actions {
    bottom: auto;
    left: auto;
    max-width: 100%;
    position: relative;
  }

  .product-detail--header {
    font-size: 1.75rem;
  }
}