.snowflake{position:absolute;display:block;border-radius:50%;background:rgba(255,255,255,.9);box-shadow:0 0 6px rgba(255,255,255,.7);animation:snowdrift 7s ease-in-out infinite;filter:blur(.3px)}@keyframes snowdrift{0%{transform:translate3d(0,-8px,0);opacity:.4}50%{transform:translate3d(4px,12px,0);opacity:.9}to{transform:translate3d(-2px,28px,0);opacity:.3}}@media (prefers-reduced-motion:reduce){.snowflake{animation:none;opacity:.6}}