Terminess Nerd Font is sharp only at 16px-multiple em sizes

Terminess (Terminus-derived) TTF outlines sit on a 62.5-unit grid at upm 1000. That makes a 16-design-pixel em with an 8px advance. Glyphs render crisp only when the em in device px is a multiple of 16. In Ghostty on Linux, px = pt * 96/72 * output scale. At 1x scale, use pt multiples of 12 (12, 24). At 1.2 fractional scale, use pt multiples of 10 (10, 20). Sizes in between, e.g. 17pt at 1.2x = 27.2px, give uneven stems and soft text.