.popup__button_link {
  border: 2px solid #3b9660;
  box-sizing: border-box;
  border-radius: 25px;
  font-size: 20px;
  line-height: 22px;
  color: #3b9660;
  text-decoration: none;
  margin: 35px 0 0 40px;
  padding: 8px 17px 7px;
  transition: 0.7s;
  background: #fff;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  width: 220px;
}

.popup__button_link:hover {
  background-color: #3b9660;
  color: #fff;
}

@media screen and (max-width: 450px) {
  .popup__button_link {
    margin: 15px auto 0;
  }
}