.form_box_callback .req:invalid {
    border: 1px solid red;
}
.form_box_callback .req:valid {
    border: 1px solid green;
}
.form-group.form_box_callback {
  display: flex;
  flex-direction: column;
  margin-bottom: 10px;
}
label.mf-text {
  margin-bottom: 5px;
}
.feedback_form {
  display: flex;
  flex-direction: column;
}
#button {
  max-width: 200px;
  min-height: 30px;
  background: aliceblue;
  border: none;
  cursor: pointer;
  transition: background-color 0.3s linear;
}
#button:hover {
  background-color: #D8FCFF;
}
.OK_MESSAGE {
  color: green;
  text-align: center;
  margin: 30px 0px 30px 0px;
}
.grecaptcha-badge {
  display: none;
}