.snowflake{position:fixed;top:-10%;z-index:9999;user-select:none;pointer-events:none;animation-name:snow-fall,snow-shake;animation-duration:12s,4s;animation-timing-function:linear,ease-in-out;animation-iteration-count:infinite,infinite}
@keyframes snow-fall{0%{top:-10%}100%{top:110%}}
@keyframes snow-shake{0%,100%{transform:translateX(0)}50%{transform:translateX(80px)}}