* {
  box-sizing: border-box;
}

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

body {
  overflow: hidden;
  background: #111;
}

.image-page {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
}

.image-page img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}