div.tp-dark-screen {
  position: fixed;
  margin: 0;
  padding: 0;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  width: auto;
  height: auto;
  z-index: 999999;
  
  background-color: transparent;
  transition: background-color .2s;
}

div.tp-dark-screen.fade-in {
  transition: background-color .5s;
  background-color: rgba(0,0,0,.4);
  cursor: pointer;
}