A houzz contributor, not too long ago, had made a wine rack out of 4'x4' wooden pallets, that are used in the US to move a load of goods with a fork-lift truck. Perhaps they have them in your country. He cut them in half so they were only two feet deep and stacked them up to high counter height. The wood would be a nice contrast with your concrete, might add a little warmth to the space. cascio.offsite@gmail.com

sararahim123 What constitutes an adequate illumination level varies from person to person. What exactly do you require illuminated? If its simply ambient light you would have tiny lights as shown that throw light on the stairs itself. If a bit more is required you could consider adding a railing with a light under. If general illumination is what you are going after, but in a muted way, would suggest wall scones that throw light upwards onto the ceiling, diffusing the light.

Greetings From Dream Design, As per your Inputs we are suggestion you some ideas -You can go for stone cladding in between of the staircase wall and wood on left and right side -or you can do reverse wodden design in center and stone cladding left and right -And use the Glass railing for staircase Other reference images are:

It would be wrong to give your staircase the first pick of space. You should lead with your living areas. In case you are interested in hiring an architect, you could email me your requirements.