When the grid starts to move
Pattern is usually asked to behave: repeat quietly, hold the edge, disappear into the background. In the northern workshops of 1912, a checker could do more. It gave a coat its rhythm, made motion legible at a distance, and turned a small act of attention into a visual rule.
The Kurogane interface borrows that restraint. The grid appears only at thresholds—the nav, the article marker, the measured rail—then a single teal arc cuts across the dark. That contrast is the point: craft establishes the breath, while color records the instant it breaks.