:root {
  color-scheme: light;
  background: #f5f4ef;
}

body {
  margin: 0;
}

.page-shell {
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  place-items: center;
}

.mark {
  display: block;
  width: 60vmin;
  width: min(60vw, 60svh);
  height: auto;
}