<div class="btn-group btn-group-lg w-100 mx-auto">
    @if($previous)
        <a href="{{ route('lessons.show', ['id' => $previous->id]) }}"
           class="btn btn-outline-secondary w-100">&larr; Попереднє</a>
    @endif

    @if($lesson->exercises_count > 0)
        <a href="{{ route('exercises.show', ['id' => $lesson->id]) }}"
           class="btn btn-outline-primary w-100">Вправи</a>
    @elseif($next)
        <a href="{{ route('lessons.show', ['id' => $next->id]) }}"
           class="btn w-100 btn-outline-info">Наступне &rarr;</a>
    @else
        <a href="{{ route('course.complete', ['id' => $lesson->course->id ]) }}"
           class="btn w-100 btn-success">ЗАВЕРШИТИ!</a>
    @endif
</div>