div .botonera {
  /*margin: 5px;*/
  padding: 10px;
  margin-bottom: 20px;
  width: 70px;
  text-align: center;
  border: 1px solid #000000;
  background-color: #737373;
}

button {
  background-color: #ffffff;
}

button:hover {
  background-color: #8cc255;
}