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yx.zhang
b873b9321e
Re-declare the derived elevation tokens on body * so per-surface --dsw-elevation-stroke-color rebinds reach the consuming shadow (custom properties inherit with var() already substituted); pin that mechanism and add synthetic rejection cases to the stylesheet scans; take the ring-track basenames through node:path so the exemption matches on Windows; update the ModelsSection row-card spec to the hairline recipe; align the elevation note with the shipped l1 menu rebind, refresh the feedback-popover note's surface recipe, and document the soft tier.
29 lines
3.7 KiB
Markdown
29 lines
3.7 KiB
Markdown
# Web UI style reference
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English | [中文](web-styling.zh.md)
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This reference defines styling ownership and component rules for browser client packages. The current token values live in [`packages/client/ui-theme/src/styles/`](../packages/client/ui-theme/src/styles/); this document does not duplicate that generated-by-source inventory.
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## Ownership
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[`ui-theme`](../packages/client/ui-theme/README.md) owns the `--dsw-*` static scale, semantic aliases, typography, motion, gradients, shadows, scrollbar styles, and light/dark preference. [`ui-layout`](../packages/client/ui-layout/README.md) applies the resolved theme snapshot to the document. Feature packages consume semantic aliases and do not define another global theme.
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Global style sheets belong in `ui-theme/src/styles/`. Component styles live beside their component as CSS Modules. A component may define a local custom property when its value is part of that component's layout or presentation contract; shared colors, typography, elevation, and motion belong to the theme package.
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## Component rules
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- Use CSS Modules and `clsx`; do not add a component library or Tailwind.
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- Use `--dsw-alias-*` semantic tokens in feature components. Do not copy static palette values or write literal colors there.
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- Keep theme selectors out of feature component CSS. Light/dark overrides belong to the theme owner.
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- Pair font sizes with line heights and use the theme typography variables when an existing role matches.
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- Keep source text, terminal output, and diff lines unwrapped when their component contract requires column preservation; use the shared scrollbar styles rather than component-specific scrollbar selectors.
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- Put presentation in CSS. Inline React styles may pass component-local custom-property values but must not encode theme branches.
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- Preserve keyboard focus visibility and reduced-motion behavior when adding transitions or hover-only controls.
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- Rounded corners inherit the global superellipse smoothing from ui-theme's `corner-shape.css` on supporting engines. Pair `corner-shape: round` with every full-round `border-radius` (`50%`, `100%`, or a pill radius) so circles and capsules keep circular arcs; the ui-theme corner-shape spec enforces the pairing.
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- Elevated surfaces (menus, popovers, modals, panels, floating buttons, the composer) set `border: 0` and take `box-shadow: var(--dsw-elevation-panel)`, `var(--dsw-elevation-prominent)`, or the composer's `var(--dsw-elevation-soft)` (larger blur at lower alpha): the 0.5px hairline stroke is the first shadow layer, and `--dsw-elevation-stroke-color` rebinds or suppresses it per surface or state. Never pair a `--dsw-alias-border-*` border with an lv/elevation shadow — the ui-theme elevation spec rejects the pairing; state-colored borders (warn panels) stay real borders.
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- Flat borders and separators that use a neutral `--dsw-alias-border-*` token draw at `0.5px` — buttons, inputs, cards, row dividers, and separators drawn as filled boxes (menu separators, the conversation header seam, markdown `hr`, vertical rails) share the hairline weight, which Chromium paints as one device pixel. Dashed affordances and state-colored borders keep 1px; spinner ring tracks keep their width through the spec's explicit allowlist. The ui-theme elevation spec rejects wider neutral solid borders.
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## Changing the system
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Add or change a shared token in the owning `ui-theme` sheet, then consume its semantic alias from feature packages. Update the owning package reference when a public styling contract changes. Visual behavior follows the [testing policy](testing.md); the [styling-system Agent Note](../.agents/notes/implemented/process/2026-07-19-web-styling-system.md) records framework rationale.
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