.wrapper {
  position: relative;
  padding-top: 56.25%; /* 16:9 Aspect Ratio */
}
img {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: auto;
}


/* body, html {
  height: 100%;
}

.bg {
  /* The image used */
  background-image: url("younicorn.jpg");

  /* Full height */
  height: 100%;

  /* Center and scale the image nicely */
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}
*/