examples/showcases/banking/docs/DESIGN.md
A premium, airy, light-theme fintech aesthetic for the banking demo. This is a visual layer: it restyles the existing app without changing logic, data flow, REST calls, the CopilotKit provider/runtime, HITL approval flows, the threads drawer, auth/role gating, or the teachable policy-exception gate.
The system is token-driven. Tokens live in
src/app/globals.css as CSS custom properties,
surfaced to Tailwind v4 via @theme inline so utilities like bg-surface,
text-ink-muted, from-brand-violet, ring-brand, bg-positive resolve
everywhere. Both light (the primary showcase mode) and dark are fully
supported via the class-based .light / .dark toggle on <html>.
#7C5CFC → #5B3DF5), reused on the
primary button, the active nav icon, the credit-card face, progress bars, and
CTAs (.brand-gradient).next/font/google, exposed as
--font-inter → --font-sans). Very large bold balance numbers, small
muted-grey labels, medium-weight violet section headings (.section-heading).rounded-2xl / --radius), buttons fully
rounded pills (rounded-full), inputs/menus ~12–16px.All colors are HSL triplets behind hsl(var(--token)), exposed as Tailwind
colors (brand, brand-violet, brand-indigo, brand-soft, surface,
surface-muted, canvas, ink, ink-muted, positive, positive-soft,
negative, negative-soft, hairline).
| Token | Light | Dark | Role |
|---|---|---|---|
--canvas | 255 60% 97% | 252 30% 7% | App background (lavender / deep indigo) |
--surface | 0 0% 100% | 252 24% 11% | Cards, sidebar, menus |
--surface-muted | 252 40% 98% | 252 22% 14% | Row hover, inset blocks |
--ink | 252 30% 14% | 250 30% 96% | Primary text / headings |
--ink-muted | 250 12% 46% | 250 12% 66% | Secondary / label text |
--hairline | 252 30% 92% | 252 20% 22% | Borders / dividers |
--brand/-violet | 252 83% 67% | (shared) | Primary violet |
--brand-indigo | 248 84% 60% | (shared) | Gradient end / heading color |
--brand-soft | 252 90% 96% | 252 50% 18% | Lilac chips, hover wash, avatar bg |
--positive | 152 62% 40% | 152 56% 50% | Income / available credit |
--positive-soft | 152 70% 95% | 152 40% 16% | Income chip background |
--negative | 349 78% 56% | 349 80% 64% | Expense / destructive |
--negative-soft | 349 90% 96% | 349 40% 18% | Expense chip background |
| Token | Value |
|---|---|
--radius (lg) | 1.375rem (~22px) — card baseline |
radius-xl/2xl | +6px / +12px — sidebar, hero panels |
radius-md/sm | -6px / -10px |
--shadow-soft | resting card shadow (low, violet-tinted) |
--shadow-lift | hover / floating panels / menus |
--shadow-glow | violet glow under gradient CTAs |
--font-sans | var(--font-inter), ui-sans-serif, system-ui… |
@layer components).brand-gradient — the 135° violet→indigo gradient (buttons, card, CTAs)..brand-text-gradient — same gradient clipped to text..glass-surface — translucent surface + backdrop blur (floating sidebar, cards)..section-heading — medium-weight violet/indigo section title.src/components/layout.tsx) — ~72px, white glass,
rounded, soft-shadowed, detached from the screen edge. Brand mark at top; nav
icons (Dashboard / Credit Cards / Team) with a violet gradient active
state; theme toggle, user switcher, and a help "?" pinned at the bottom.
Role gating (Team only for admins) and the useAgentContext page readable are
unchanged.src/app/dashboard/page.tsx, mirrored by /cards) — two
columns on a lavender canvas:
src/components/statistics-chart.tsx is a hand-rolled inline SVG area+line
sparkline — no charting dependency. It takes a numeric series (derived from real
transaction data, bucketed by month; falls back to representative seeded points
when there isn't enough data), draws a violet→indigo gradient stroke over a soft
gradient area fill, emphasizes the latest point, and labels the axis with the
final point highlighted in violet. It includes an aria-label and an
sr-only numeric summary.
src/components/card-visual.tsx exports GradientCreditCard (the vivid violet
gradient face: EMV chip, masked •••• •••• •••• last4, holder, valid-thru, and a
brand mark) plus VisaWordmark and the overlapping-circles MastercardMark. A
subtle variant renders the dimmed card that peeks behind the active one.
The embedded CopilotPopup is themed via CSS only — no component props
were changed. The v2 chat scopes its shadcn-style tokens to [data-copilotkit];
globals.css re-points --primary / --primary-foreground / --ring on that
selector (and its dark variant) to the brand violet, so the send button, focus
rings, and links match. This is additive and degrades gracefully if the SDK's
internals change. All chat wiring (provider, threads, suggestions, HITL) is
untouched.
ring-brand with offset) on buttons, tabs, inputs, menu
items, and the help/nav controls.<button> / <nav> / aria-current="page" on the active nav item;
aria-labels on icon-only controls; role="img" + aria-label on the chart.