body {
  margin:0;
  overflow:hidden;
  background:black;
  color:white;
  font-family:Arial;
}

#bg {
  position: fixed;
  top:0;
  left:0;
  width:100%;
  height:100%;
}

#overlay {
  position:absolute;
  top:50%;
  left:50%;
  transform:translate(-50%, -50%);
  text-align:center;
  z-index:10;
}

h1 {
  font-size:4rem;
  background:linear-gradient(90deg,#00f0ff,#ff00ff);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
}