.row
  .col-sm-4
    p
      input#s-radio-1.with-gap(name="s-radio" type="radio")
      label(for="s-radio-1") Radio
  .col-sm-4
    p
      input#s-radio-2.invalid.with-gap(name="s-radio" type="radio")
      label(for="s-radio-2") Radio error
    p.error This is required
  .col-sm-4
    p
      input#s-radio-3.with-gap(name="s-radio" type="radio" disabled)
      label.error(for="s-radio-3") Radio disabled