@keyframes shake {
         10%, 90% { transform: translate3d(-1px, 0px, 0px); }
         20%, 80% { transform: translate3d(2px, 0px, 0px); }
         30%, 50%, 70% { transform: translate3d(-3px, 0px, 0px); }
         40%, 60% { transform: translate3d(3px, 0px, 0px); }
         }