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

body {
  display: grid;
  place-items: center;
  overflow: hidden;
  background: #070312;
}

img {
  display: block;
  width: min(82vmin, 900px);
  height: auto;
  max-width: 90vw;
  max-height: 90vh;
}