html, body{
  width: 100%;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0;
  padding: 0;
  background-image: url(denise.jpg);
  background-size: cover
}
div{
  font-size: 48px;
  font-family: sans-serif;
  color: white;
  margin: 20px;
  text-align: center;
}