.popup {
  background-color: #fff;
  position: fixed;
  bottom: 1.5%;
  right: 1.5%;
  width: 350px;
  max-width: 50%;
  border-top: 4px solid #111;
	box-shadow: 0px 4px 5px 1px #666;
}

.popup-intro {
  margin-bottom: 0.5rem;
}

.popup-close {
  position: absolute;
  top: 0;
  right: 0;
}

.popup-content {
  padding: 1rem 1.5rem;
}
    .popup-title {
      padding-top: 2rem;
    }
.popup-content h4 {
  font-size: 1.5em;
}
.popup-close .close-button {
  right: 1rem;
  top: 0.5rem;
  font-size: 2em;
  line-height: 1;
  position: absolute;
  color: #8a8a8a;
  cursor: pointer;
  background: transparent;
  border: none;
  outline: none;
}