.snowflake{position:fixed;top:-10vh;width:var(--size,10px);height:var(--size,10px);background:#dcdcdc;border-radius:50%;opacity:0;animation:fall linear infinite;animation-duration:var(--duration);animation-delay:var(--delay);left:var(--left);pointer-events:none;z-index:9999}@keyframes fall{0%{transform:translateY(0);opacity:0}10%{opacity:.8}to{transform:translateY(120vh);opacity:.2}}