.overlay {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.7);
  transition: opacity 500ms;
  visibility: hidden;
  opacity: 0;
}
.overlay:target {
  visibility: visible;
  opacity: 1;
  z-index: 1000;
}

.popup {
  margin: 4px auto;
  padding: 1px;
  background: #fff;
  border-radius: 4px;
  width: 380px;
  height: calc(100% - 8px);
  max-height: 640px;
  position: relative;
}

.popup h2 {
  margin-top: 0;
  color: #333;
  font-family: Tahoma, Arial, sans-serif;
}
.popup .close {
  position: absolute;
  top: 16px;
  right: 16px;
  transition: all 200ms;
  font-size: 26px;
  font-weight: normal;
  text-decoration: none;
  color: #333;
}
.popup .close:hover {
  color: #E31920;
}
.popup .content {
  height: 100%;
}

/*@media screen and (max-width: 700px){
  .popup{
    width: 70%;
  }
}*/