#label {

  position: absolute;

  top: px;

  right: 20px;

  font-size: 3em;

  color: rebeccapurple;

  cursor: pointer;

}

#toggle {
10
  display: none;

}

.oscuro {

  background-color: #333;

  color: white;

  transition: all 1.5s ease;

}

​