:root{color-scheme:dark;color:#ffffffde;background-color:#222}.sph{width:100ph;aspect-ratio:1;border:10px solid black;border-radius:50%}.cub{width:100ph;aspect-ratio:1;border:10px solid black}.cyl{width:100ph;aspect-ratio:1;border:10px solid black;border-radius:50%/10%}.rmb{aspect-ratio:1;border:10px solid black;transform:rotate(45deg) scale(.8)}