.container {
  max-width: 960px;
}
.form-check-input.is-valid:checked,
.was-validated .form-check-input:valid:checked {
  background-color: black;
}
.form-check-input:checked[type="radio"] {
  background-image: none;
}
.form-check-input.is-valid,
.was-validated .form-check-input:valid {
  border-color: black;
}
.form-check-input.is-valid ~ .form-check-label,
.was-validated .form-check-input:valid ~ .form-check-label {
  color: black;
}
.form-check-input:checked {
  background-color: black;
  border-color: black;
}