jQuery(document).ready(function($) {
  $('fieldset.wizard-question:visible:last').addClass('latest');
  
  $('fieldset.wizard-question').on('change', function() {
    $('fieldset.wizard-question:visible').removeClass('latest');
    $('fieldset.wizard-question:visible:last').addClass('latest');
  
    if($('.wizard-answer').is(':visible')) {
      $('fieldset.wizard-question:visible:last').removeClass('latest');
    }
    
    if($('.wizard-answer').is(':visible')) {
      $('fieldset.wizard-question:visible:last').removeClass('latest');
    }
    // uncheck all hidden radiobuttons when there's a change in fieldset 
    $('.form-radio:hidden').prop('checked', false);
  });
});