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

body {
  margin: 0;
  min-height: 100svh;
  display: grid;
  place-items: center;
}

main {
  position: relative;
  width: min(100vw, 100svh);
  aspect-ratio: 1;
}

#portrait,
.fallback {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

#portrait:not([src]) {
  visibility: hidden;
}

.credit {
  position: fixed;
  right: max(12px, env(safe-area-inset-right));
  bottom: max(12px, env(safe-area-inset-bottom));
  color: #fff;
  opacity: .5;
  font: 12px Arial, Helvetica, sans-serif;
}

.credit a {
  color: inherit;
  text-decoration: underline;
}

.credit a:focus-visible {
  outline: 1px solid currentColor;
  outline-offset: 4px;
}