body {
  margin: 0;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background-image: url("background.jpg");
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
}
img {
  max-width: 80vw;
  max-height: 60vh;
}