.overlay {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.7);
  transition: opacity 500ms;
  visibility: visible;
  opacity: 1;
  z-index: 1001;
}
#popup {
  margin: 120px auto;
  padding: 32px 16px;
  background: #fff;
  border-radius: 5px;
  width: 440px;
  position: relative;
  transition: all 400ms ease-in-out;
  font-size: 28px;
  color: #444;
  line-height: 1.66;
  text-align: center;
}
#popup-close {
  color: #999;
  position: absolute;
  top: 8px;
  right: 20px;
  transition: all 200ms;
  font-size: 30px;
  font-weight: bold;
  text-decoration: none;
  pointer-events: auto;
}
#popup-close:hover {
  color: #36AEEA;
  text-decoration: none !important;
}
#popup a {
  text-decoration: none;
}
#popup a:hover {
  text-decoration: underline;
}
@media screen and (max-width: 700px) {
  .popup {
    width: 70%;
  }
}