:root{
  --page-bg: #ffffff;
  --shadow: 0 18px 45px rgba(0,0,0,.14);
}

*{ box-sizing: border-box; }

html, body{
  height: auto;
}

body{
  margin: 0;
  background: #fff;
  display: grid;
  place-items: center;

  /* iOS-safe viewport height */
  min-height: 100svh;  /* “small viewport height” */
  min-height: 100dvh;  /* dynamic viewport height (newer) */
}

.card{
  width: min(680px, 92vw);
  aspect-ratio: 3.5 / 2;
  filter: drop-shadow(var(--shadow));
}

.card img{
  width: 100%;
  height: 100%;
  display: block;
}