html, body {
  margin: 0;
  padding: 0;
  background: #0a0a0a;
  min-height: 100vh;
}

main {
  min-height: 100vh;
  display: grid;
  place-items: center;
}

img {
  max-width: 100%;
  max-height: 100vh;
  height: auto;
  display: block;
}