:root {
  --page-bg: #080808;
}

* {
  box-sizing: border-box;
}

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

body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: var(--page-bg);
  font-family: Arial, sans-serif;
}

.poster-shell {
  width: min(100vw, calc(100vh * 1.5));
  aspect-ratio: 3 / 2;
  display: grid;
  place-items: center;
  position: relative;
}

.poster {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  user-select: none;
  -webkit-user-drag: none;
}

.qr-code {
  position: absolute;
  top: 63%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: clamp(100px, 13vw, 170px);
  height: auto;
  display: block;
  user-select: none;
  -webkit-user-drag: none;
}

@media (max-width: 900px) {
  .poster-shell {
    width: 100vw;
    height: auto;
  }

  .qr-code {
    top: 70%;
    left: 50%;
    width: clamp(72px, 18vw, 96px);
  }
}