.toast {
  visibility: hidden;
  min-width: 200px;
  margin-left: -100px;
  background-color: #333;
  color: #fff;
  text-align: center;
  border-radius: 25px;
  padding: 16px;
  position: fixed;
  z-index: 1000;
  left: 50%;
  bottom: 30px;
  font-size: 16px;
  opacity: 0;
  transition: opacity 0.5s, bottom 0.5s;
}

.toast.show {
  visibility: visible;
  opacity: 1;
  bottom: 50px;
}