#cajero {
  width: 50%;
  margin: auto;
  text-align: center;
  border: 10px solid gray;
  border-radius: 50px;
  background-color: #0059B2;
  color: white;
}

#cajero input {
  color: blue;
  border-radius: 2em;
  padding: .5em 1em
}

#cajero button {
  font-size: 100%;
  padding: .5em 1em;
  color: #444;
  color: rgba(0, 0, 0, .8);
  border: 1px solid #999;
  border: transparent;
  background-color: #E6E6E6;
  text-decoration: none;
  border-radius: 10px
}

#cajero button:hover {
  filter: alpha(opacity=90);
  background-image: -webkit-linear-gradient(transparent, rgba(0, 0, 0, .05) 40%, rgba(0, 0, 0, .1));
  background-image: linear-gradient(transparent, rgba(0, 0, 0, .05) 40%, rgba(0, 0, 0, .1))
}



#caja_resultado {
  padding: 10px;
}