#lightbox {
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0px;
  left: 0px;
  background: rgba(0, 0, 0, 0.8);
  display: none;
  z-index:10000000000000000000000;
}

#lightbox.open {
  display: block;
}

#lightbox_content {
  position: absolute;
  width: 50%;
  height: 400px;
  background: #ffffff;
  border-radius: 3px;
  left: 25%;
  top: 20%;
  padding-top:100px;

  text-align: center;
}

#close {
  position: absolute;
  right: 20px;
  top: 20px;
  background: rgba(0, 0, 0, 0.2);
  height: 30px;
  width: 30px;
  border-radius: 15px;
  text-align: center;
  color: #ffffff;
  cursor: pointer;
  font-size:20px;
}

@media only screen and (max-width: 640px) {
#lightbox_content {
  position: absolute;
  width: 90%;
  height: 400px;
  background: #ffffff;
  border-radius: 3px;
  left: 5%;
  top: 10%;
  padding-top:100px;

  text-align: center;
}	
}