Create an image of the interior of a two-story commercial building featuring large glass windows and black concrete walls. The space should be open and modern, with plenty of natural light streaming through the expansive windows. The interior design should include sleek, minimalist furnishings and fixtures. Both floors should have wooden railings running around the entire perimeter, adding warmth and contrast to the industrial feel of the concrete. Include some plants and contemporary art pieces to enhance the inviting and stylish atmosphere.