}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem;
    min-width: 70px;
    opacity: 0.4;
    transition: all 0.3s ease;
}

.progress-step.active {
    opacity: 1;
}

.progress-step.completed {
    opacity: 0.7;
}

.progress-step .step-icon {
    width: 32px;
    height: 32px;

      @Override
      protected Iterator<Integer> newTargetIterator() {
        return Iterators.concat(iterateOver(), iterateOver());
      }
    }.test();
  }

  @GwtIncompatible // slow (~3s)
  public void testConcatSingletonYieldsSingleton() {
    new SingletonIteratorTester() {
      @Override
      protected Iterator<Integer> newTargetIterator() {
        return Iterators.concat(iterateOver(1));

      @Override
      protected Iterator<Integer> newTargetIterator() {
        return Iterators.concat(iterateOver(), iterateOver());
      }
    }.test();
  }

  @GwtIncompatible // slow (~3s)
  public void testConcatSingletonYieldsSingleton() {
    new SingletonIteratorTester() {
      @Override
      protected Iterator<Integer> newTargetIterator() {
        return Iterators.concat(iterateOver(1));