#html {
    background-color:black;
}

#cum {
    font-family: Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
    color: purple;
    font-size: 50px;
    position: absolute;
    top: 10%;
    left: 50%;
    transform: translate(-50%, -50%);
}

#source {
  color:white;
  font-size: 10px;
  position: absolute;
  top: 90%;
  left: 50%;
}

.center-fit {
  width: 80%;
  height: 80%;
  position: fixed;
  top: 10%;
  left: 10%;
}