:root {
  color-scheme: dark;
  background: #000;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  width: 100%;
  min-height: 100%;
  background: #000;
}

body {
  overflow: hidden;
}

.holding-page {
  width: 100vw;
  height: 100svh;
  min-height: 100vh;
  background: #000;
  display: grid;
  place-items: center;
}

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

/* On narrow phone screens, keep the visual centre of the composition. */
@media (max-aspect-ratio: 4/5) {
  .holding-page img {
    object-position: center center;
  }
}