LR window seat inspiration--but with thick cushion. (Note how backrest plane and then seat plane expand overall width without having to thicken the wall.) Napa Valley House by Steven Harris Architecture (Architect: Eliot Lee)
Origami Stair by Bell Phillips is made of folded stainless steel and framed with a glass balustrade. Very modern. Love the metal and glass contrast. It allows lots of light through, whilst still being strong structurally.