:root {
    --elevation-0: 0;
    --elevation-1: 0 1px 3px hsla(0,0%,0%,.12), 0 1px 2px hsla(0,0%,0%,.24);
    --elevation-2: 0 3px 6px hsla(0,0%,0%,.15), 0 2px 4px hsla(0,0%,0%,.12);
    --elevation-3: 0 10px 20px hsla(0,0%,0%,.15), 0 3px 6px hsla(0,0%,0%,.10);
    --elevation-4: 0 15px 25px hsla(0,0%,0%,.15), 0 5px 10px hsla(0,0%,0%,.5);
    --elevation-5: 0 20px 40px hsla(0,0%,0%,.2);
}