html {
  font-size: 16px;
  height: 100vh;
  width: 100vw;
  overflow: none;
  font-family: "Comic Sans MS", system-ui;
  background-color: #000;
  color: #fff;
}

#fire {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100px;
  background-image: url("../img/fire.gif");
  background-size: contain;
  background-repeat: repeat-x;
  mix-blend-mode: difference;
}

#c {
  position: fixed;
  top: 0;
  left: calc(50vw - 500px);
  width: 1000px;
  height: 1200px;
}