wehub-resource-sync
129 lines
7.3 KiB
Markdown
129 lines
7.3 KiB
Markdown
# Northwind Finance — Design System ("Aurora")
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A premium, airy, light-theme fintech aesthetic for the banking demo. This is a
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**visual layer**: it restyles the existing app without changing logic, data
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flow, REST calls, the CopilotKit provider/runtime, HITL approval flows, the
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threads drawer, auth/role gating, or the teachable policy-exception gate.
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The system is token-driven. Tokens live in
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[`src/app/globals.css`](../src/app/globals.css) as CSS custom properties,
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surfaced to Tailwind v4 via `@theme inline` so utilities like `bg-surface`,
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`text-ink-muted`, `from-brand-violet`, `ring-brand`, `bg-positive` resolve
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everywhere. Both **light** (the primary showcase mode) and **dark** are fully
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supported via the class-based `.light` / `.dark` toggle on `<html>`.
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## Design language
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- **Mood** — premium, airy, modern. Generous whitespace, soft layered shadows,
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large radii, glassmorphism-lite surfaces.
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- **Canvas** — a soft lavender/lilac page background; content floats above it on
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white glass cards.
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- **Primary** — a violet→indigo gradient (`#7C5CFC` → `#5B3DF5`), reused on the
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primary button, the active nav icon, the credit-card face, progress bars, and
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CTAs (`.brand-gradient`).
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- **Semantics** — income/positive is emerald green with an up-and-right arrow;
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expense/negative is rose/red with a down-and-right arrow.
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- **Typography** — Inter (loaded via `next/font/google`, exposed as
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`--font-inter` → `--font-sans`). Very large bold balance numbers, small
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muted-grey labels, medium-weight violet section headings (`.section-heading`).
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- **Shape** — cards ~22px radius (`rounded-2xl` / `--radius`), buttons fully
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rounded pills (`rounded-full`), inputs/menus ~12–16px.
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## Color tokens
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All colors are HSL triplets behind `hsl(var(--token))`, exposed as Tailwind
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colors (`brand`, `brand-violet`, `brand-indigo`, `brand-soft`, `surface`,
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`surface-muted`, `canvas`, `ink`, `ink-muted`, `positive`, `positive-soft`,
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`negative`, `negative-soft`, `hairline`).
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| Token | Light | Dark | Role |
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| ------------------- | ------------- | ------------- | --------------------------------------- |
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| `--canvas` | `255 60% 97%` | `252 30% 7%` | App background (lavender / deep indigo) |
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| `--surface` | `0 0% 100%` | `252 24% 11%` | Cards, sidebar, menus |
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| `--surface-muted` | `252 40% 98%` | `252 22% 14%` | Row hover, inset blocks |
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| `--ink` | `252 30% 14%` | `250 30% 96%` | Primary text / headings |
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| `--ink-muted` | `250 12% 46%` | `250 12% 66%` | Secondary / label text |
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| `--hairline` | `252 30% 92%` | `252 20% 22%` | Borders / dividers |
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| `--brand`/`-violet` | `252 83% 67%` | (shared) | Primary violet |
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| `--brand-indigo` | `248 84% 60%` | (shared) | Gradient end / heading color |
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| `--brand-soft` | `252 90% 96%` | `252 50% 18%` | Lilac chips, hover wash, avatar bg |
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| `--positive` | `152 62% 40%` | `152 56% 50%` | Income / available credit |
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| `--positive-soft` | `152 70% 95%` | `152 40% 16%` | Income chip background |
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| `--negative` | `349 78% 56%` | `349 80% 64%` | Expense / destructive |
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| `--negative-soft` | `349 90% 96%` | `349 40% 18%` | Expense chip background |
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## Radius, shadow, font scale
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| Token | Value |
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| --------------- | ---------------------------------------------- |
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| `--radius` (lg) | `1.375rem` (~22px) — card baseline |
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| `radius-xl/2xl` | `+6px` / `+12px` — sidebar, hero panels |
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| `radius-md/sm` | `-6px` / `-10px` |
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| `--shadow-soft` | resting card shadow (low, violet-tinted) |
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| `--shadow-lift` | hover / floating panels / menus |
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| `--shadow-glow` | violet glow under gradient CTAs |
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| `--font-sans` | `var(--font-inter), ui-sans-serif, system-ui…` |
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## Helper classes (in `@layer components`)
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- `.brand-gradient` — the 135° violet→indigo gradient (buttons, card, CTAs).
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- `.brand-text-gradient` — same gradient clipped to text.
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- `.glass-surface` — translucent surface + backdrop blur (floating sidebar, cards).
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- `.section-heading` — medium-weight violet/indigo section title.
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## Layout
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- **Floating icon rail** (`src/components/layout.tsx`) — ~72px, white glass,
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rounded, soft-shadowed, detached from the screen edge. Brand mark at top; nav
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icons (Dashboard / Credit Cards / Team) with a violet **gradient active
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state**; theme toggle, user switcher, and a help "?" pinned at the bottom.
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Role gating (Team only for admins) and the `useAgentContext` page readable are
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unchanged.
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- **Dashboard** (`src/app/dashboard/page.tsx`, mirrored by `/cards`) — two
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columns on a lavender canvas:
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- **Left**: "My Cards" (dashed add-card tile + a vivid gradient credit card,
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with a second card peeking behind) and "Recent Transactions" with a
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"View All" link, **underline** ALL / INCOME / EXPENSES tabs, a "TODAY"
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chip, and transaction rows (circular tinted badge + title + subtitle +
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colored amount).
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- **Right rail**: a tall rounded panel — **Balance** (large bold) + masked
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card number; an Income / Expenses split with colored arrows; a divider;
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**Last Payment Details**; a **Statistics** sparkline; and a gradient pill
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**New Transaction →** CTA.
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## Statistics chart
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`src/components/statistics-chart.tsx` is a **hand-rolled inline SVG** area+line
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sparkline — no charting dependency. It takes a numeric series (derived from real
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transaction data, bucketed by month; falls back to representative seeded points
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when there isn't enough data), draws a violet→indigo gradient stroke over a soft
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gradient area fill, emphasizes the latest point, and labels the axis with the
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final point highlighted in violet. It includes an `aria-label` and an
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`sr-only` numeric summary.
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## Credit-card visual
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`src/components/card-visual.tsx` exports `GradientCreditCard` (the vivid violet
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gradient face: EMV chip, masked `•••• •••• •••• last4`, holder, valid-thru, and a
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brand mark) plus `VisaWordmark` and the overlapping-circles `MastercardMark`. A
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`subtle` variant renders the dimmed card that peeks behind the active one.
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## CopilotKit chat popup
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The embedded `CopilotPopup` is themed **via CSS only** — no component props
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were changed. The v2 chat scopes its shadcn-style tokens to `[data-copilotkit]`;
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`globals.css` re-points `--primary` / `--primary-foreground` / `--ring` on that
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selector (and its dark variant) to the brand violet, so the send button, focus
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rings, and links match. This is additive and degrades gracefully if the SDK's
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internals change. All chat wiring (provider, threads, suggestions, HITL) is
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untouched.
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## Accessibility
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- Focus-visible rings (`ring-brand` with offset) on buttons, tabs, inputs, menu
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items, and the help/nav controls.
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- Semantic `<button>` / `<nav>` / `aria-current="page"` on the active nav item;
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`aria-label`s on icon-only controls; `role="img"` + `aria-label` on the chart.
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- Color pairings (ink on surface, brand-foreground on gradient, positive/negative
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on their soft backgrounds) target legible contrast in both themes.
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