html, body {
    margin: 0;
    padding: 0; 
}

#toast {
  visibility: hidden;
  min-width: 250px;
  margin-left: -125px;
  background-color: #333;
  color: #fff;
  text-align: center;
  border-radius: 2px;
  padding: 16px;
  position: fixed;
  z-index: 1;
  left: 50%;
  bottom: 30px;
  font-size: 17px;
  opacity: 0;
  transition: opacity 0.5s, visibility 0.5s;
}

#toast.show {
  visibility: visible;
  opacity: 1;
}