Brand first. Then the interface, built directly on it. Components before screens, type scale, spacing, interaction patterns locked once, then reused. Seventy screens drawn one at a time is seventy separate decisions, each a chance to disagree with the last. Seventy screens assembled from a system is one decision, applied, and the seventy-first costs almost nothing. Done solo, which is exactly why the system mattered more, not less: no one to keep pace with, no one to catch a screen that drifted.