.form-cheque-libro {
  max-width: 400px;
  margin: 20px 0;
}
.form-cheque-libro label {
  display: block;
  margin-top: 10px;
}
.form-cheque-libro input,
.form-cheque-libro select {
  width: 100%;
  padding: 8px;
  margin-top: 4px;
}
.form-cheque-libro button {
  margin-top: 12px;
  padding: 10px 20px;
  background-color: #337ab7;
  color: #fff;
  border: none;
  cursor: pointer;
}
.form-ok {
  padding: 10px;
  color: green;
  border: 1px solid green;
  margin-bottom: 15px;
}