<div class="card card-invitation">
  <div class="container-fluid">
    <div class="row">
      <div class="col-xs-12 col-sm-offset-3 col-sm-6">
        <div class="well">
          <p ng-show="error" class="text-danger">{{error}}</p>

          <form name="groupForm" role="form" ng-submit="submit()">
            <div class="form-group" ng-class="{'has-error':!code}">
              <input
                  type="text"
                  class="form-control"
                  ng-model="code"
                  placeholder="Please type in your code here."
                  ng-disabled="loading">
            </div>
            <div class="text-right">
              <button type="submit" class="btn btn-primary" ng-disabled="!code||loading">
                <i class="fa" ng-class="{'fa-sign-in':!loading,'fa-spinner fa-spin':loading}"></i> Enter
              </button>
            </div>
          </form>
        </div>
      </div>
    </div>
  </div>
</div>


<div class="card card-code">
  <div class="container-fluid">
    <div class="row">
      <div class="col-xs-12 col-sm-offset-3 col-sm-6">
        <div class="well">
          <p ng-show="error" class="text-danger">{{error}}</p>

          <form name="groupForm" role="form" ng-submit="submit()">
            <div class="form-group" ng-class="{'has-error':!code}">
              <input
                  type="text"
                  class="form-control"
                  ng-model="code"
                  placeholder="Please type in your code here."
                  ng-disabled="loading">
            </div>
            <div class="text-right">
              <button type="submit" class="btn btn-primary" ng-disabled="!code||loading">
                <i class="fa" ng-class="{'fa-sign-in':!loading,'fa-spinner fa-spin':loading}"></i> Enter
              </button>
            </div>
          </form>
        </div>
      </div>
    </div>
  </div>
</div>


Use the right style class.
Use the right style class.
