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

body {
  background-color: rgb(63,63,63);
  background-size: cover;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

img {
  z-index: -1;
  position: absolute;
}