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nexu-io__open-design/craft/typography.md
Joey-nexu f1a0b60c6c chore: unify product name display to OpenDesign repo-wide (#6998)
* chore: unify product name display to OpenDesign repo-wide

Rename the user-facing product name from "Open Design" to "OpenDesign"
across documentation, web/desktop UI strings, i18n locales, prompts,
plugin/skill/design-system content, changelogs, and specs, matching the
landing-page rename already in flight.

Deliberately excluded so installed-app identity stays untouched:
- packages/release PRODUCT_NAME and everything derived from it
  (app bundle names, installer/registry identity, updater feeds)
- tools/pack, tools/release, apps/packaged, landing page (PR #6983)
- mocks/ recorded traces and LICENSE
- test fixtures and comments that encode real on-disk install paths
  (Open Design.app, Program Files\Open Design, AppData paths)

Validated with pnpm guard, pnpm typecheck, and targeted web/desktop/host
test runs over the renamed strings.

* fix(web): keep two-letter author monogram for CamelCase brand names

authorInitials split words on whitespace only, so the renamed single-token
author name "OpenDesign" produced a one-letter monogram. Treat lower-to-upper
CamelCase boundaries as word breaks so the avatar fallback stays "OD".

* fix(release): restore spaced Windows source artifact names in win.ps1

tools/pack still derives builder outputs from the unchanged PRODUCT_NAME
("Open Design"), so the asset script must look for the spaced filenames.
Matches the mac/mac-intel/linux asset scripts, which were already kept on
the original names.

---------

Co-authored-by: Joey <236967869+joeylee12629-star@users.noreply.github.com>
2026-08-18 07:09:45 +00:00

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Typography craft rules

Universal typography rules that apply on top of any DESIGN.md. The active design system decides which fonts; this file decides how they behave at every size.

Adapted from refero_skill (MIT) — distilled and re-tuned for OpenDesign's token system.

Type scale

Use a multiplicative scale (1.2 or 1.25). Cap at 6–8 sizes per artifact.

Role Range
Display 48–72 px
H1 32–48 px
H2 24–32 px
H3 20–24 px
Body 15–18 px
Small 13–14 px
Caption 11–12 px

Line height (leading)

Text size Line height
Display / H1 (≥32 px) 1.0–1.2 (tight)
Body (15–18 px) 1.5–1.6
Small (≤14 px) 1.5

CJK overrides — these are not optional

The table above is Latin leading. Latin display type can go to 1.0 because the ascender/descender slack inside the em box keeps lines apart. CJK glyphs fill the em box, so the same value makes consecutive lines touch, and multi-line Chinese headlines visibly collide.

Text size Latin CJK
Display / H1 (≥32 px) 1.0–1.2 1.3–1.4
Body (15–18 px) 1.5–1.6 1.7–1.8

The CJK floor has no upper size tier. It applies to every heading level, including the cover / hero main title — the single biggest headline on a deck's first slide. A Chinese cover title at 72 px, 96 px, or larger, especially one split into multiple lines with <br>, is still CJK display text: set line-height: 1.3–1.4 on it, never the Latin 1.0–1.2. At 96 px a 1.05 leading makes the two lines of a Chinese cover headline visibly collide. This is the single most common violation, so check the cover main title first.

Negative tracking is Latin-only for the same reason: CJK is already set on a fixed em grid, so -0.02em on a Chinese headline crowds the glyphs instead of tightening the word. Use 0 for CJK display text.

When one artifact mixes both — an English kicker over a Chinese headline is the common case — set the tight Latin values on the Latin element only. Do not inherit them onto the CJK block from a shared parent rule.

Letter-spacing — the rule that makes or breaks craft

This is the single most-skipped rule in AI-generated design. No exceptions.

Context Letter-spacing
Body text (14–18 px) 0 (default)
Small text (11–13 px) 0.01em to 0.02em (positive)
UI labels and button text 0.02em
ALL CAPS 0.06em to 0.1em (required)
Headings 32 px+ -0.01em to -0.02em
Display 48 px+ -0.02em to -0.03em

ALL CAPS without positive tracking looks cramped and amateur. Display text without negative tracking looks loose and weak. These two failures are the most reliable AI-slop tells.

The 0.06em floor is not arbitrary: it is the empirical lower bound that print and web typographers have converged on for uppercase tracking (cf. Bringhurst's Elements of Typographic Style §3.2.7, which recommends 5–10% of the em for caps; modern screen practice rounds the lower end to 0.06em). Anything tighter and the counters collide on screen; the upper bound 0.1em keeps the word from disintegrating into letters.

Font pairing

  • Maximum 2 typefaces per artifact (display + body, or one variable face used at multiple weights).
  • Always declare a system fallback chain. If the active DESIGN.md ships a webfont URL, the fallback must still produce a coherent look.
  • Never set font-family: system-ui alone on a heading — that is the textbook AI default; always pair it with an intentional first choice.

Line length

Limit body copy to 50–75 characters per line. In CSS: max-width: 65ch is a safe default.

Three-weight system

Most well-crafted UIs use exactly 3 weights:

  • Read (400 / 450) — body copy
  • Emphasize (510 / 550) — UI text, labels, navigation
  • Announce (590 / 600) — headlines, buttons

Weight 700+ is rarely needed. If your design uses bold for "emphasis on emphasis," it likely lacks weight discipline elsewhere.

Common mistakes (lint these)

  • ALL CAPS without letter-spacing ≥ 0.06em.
  • Display text (≥32 px) without negative tracking (Latin only — see the CJK overrides).
  • CJK display text at Latin leading (≤1.2), which makes the lines overlap.
  • Multi-line CJK cover / hero titles (72–96 px+, e.g. split with <br>) below 1.3 line-height.
  • Negative tracking applied to CJK text.
  • More than 3 type sizes visible above the fold.
  • Mixed serif and slab on the same screen without a clear role split.
  • Body copy in text-align: justify (creates rivers; never use on the web).