.toast {
  font-size: 18px;
  position: fixed;
  top: 0px;
  left: 0;
  right: 0;
  margin: auto;
  max-width: 400px;

  text-align: center;
  padding: 12px 6px;
  border: 1px solid transparent;
  border-radius: 5px;
  color: #ffff;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.2s, top 0.2s, visibility 0.2s;
}

.toast--visible {
  top: 20px;
  opacity: 1;
  visibility: visible;
}

.toast--error {
  background-color: #ff0000;
}

.toast--success {
  background-color: #008000;
}