.snowflake {
  position: fixed;
    top: -10%;
      color: #fff;
        font-size: 1em;
          animation: fall linear infinite, shake ease-in-out infinite;
            pointer-events: none;
              z-index: 9999;
              }
              @keyframes fall { to { top: 110%; } }
              @keyframes shake { 0%,100% { transform: translateX(0); } 50% { transform: translateX(50px); } }