*{
  box-sizing:border-box;
  margin:0;
  padding:0;
}
body {
  height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  background-color: #e8e8e8;
  font-family:arial;
}
.input {
  max-width: 190px;
  padding: 12px;
  border: none;
  border-radius: 4px;
  box-shadow: 2px 2px 7px 0 rgb(0, 0, 0, 0.2);
  outline: none;
  color: dimgray;
}

.input:invalid {
  animation: justshake 0.3s forwards;
  color: red;
}

@keyframes justshake {
  25% {
    transform: translateX(5px);
  }

  50% {
    transform: translateX(-5px);
  }

  75% {
    transform: translateX(5px);
  }

  100% {
    transform: translateX-(5px);
  }
}