html, body {
  margin: 0;
  width: 100%;
  height: 100%;
}

#can1 {
  width: 100vw;
  height: 100vh;
  display: block;
}

#div1 {
  position: absolute;
  bottom: 0;
  left: 0;
  max-width: 50%;
  color: yellow;

  font-size: 150%;
}