.b-popup__btn {
  line-height: 0.8;
  width: fit-content;
  text-align: initial;
  padding: calc(clamp(6em, 9vw, 12em) * 0.05) 15px;
  bottom: 20px;
  right: 80px;
  font-size: -webkit-calc(clamp(6em, 9vw, 12em) * 0.16);
  font-size: calc(clamp(6em, 9vw, 12em) * 0.16);
}