.popup {
  display: none;
  position: fixed;
  z-index: 1;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0,0,0,0.5);
}

.popup iframe {
  display: block;
  margin: 10% auto;
  width: 80%;
  height: 80%;
  max-width: 90%;
  max-height: 90%;
}

.popup .close {
  color: #fff;
  position: absolute;
  top: 20px;
  right: 30px;
  font-size: 30px;
  font-weight: bold;
  cursor: pointer;
}

.sticky-bottom-left {
  position: fixed;
  bottom: 20px;
  left: 20px;
}