Make every decision traceable.

Evidence Ledger is a calm editorial workspace for turning research into accountable decisions, briefs, approvals, and reusable learning—without pretending uncertainty does not exist.

Research direction selected

Foundations

Quiet surfaces. Strong hierarchy. Explicit meaning.

Color roles

Canvas#F5F7F6

Primary ink#182321

Primary action#075E59

Citation link#005EA8

Focus ring#6D28D9

Typography

A research conclusion should read like a considered argument.

Source Sans 3 — UI, tables & labels

Source Serif 4 is reserved for research summary headings. Sentence case throughout; tabular figures for dates and IDs.

System constraints

4px spacing base: 4 · 8 · 12 · 16 · 24 · 32 · 48 · 64
4px controls · 8px cards · 12px dialogs
Borders and surface changes before shadows
AA minimum contrast; status never color-only
Motion explains a change, never decorates routine work

Evidence patterns

Provenance stays beside the claim.

Customers describe “proof before promise” as a decisive trust signal in high-consideration purchase journeys. [S1, S2]

Primary research · Customer interview

Confidence: medium — two interviews and a corroborating review theme; sample remains narrow.

Citation drawer would retain publisher, date, URL, captured context, freshness and the exact claims supported.

Checking Assigned to R. Verma · review due before decision is approved.

Confidence is an assessment; verification is a visible workflow state.

Decision & approval

Prioritise proof-led positioning

Owner: Strategy · Proposed today

Proposed

Supporting and contradicting evidence remain linked.

P0 component library

Small primitives that compose into accountable work.

Prioritised component inventory
Foundation	Evidence & decisions	System states
App shell, context bar, left navigation, tabs	Source chip, status lozenge, confidence indicator, citation marker	Inline validation, error summary, banner, empty state
Buttons, links, fields, selects, checkbox, radio	Research claim card, decision header, approval panel, activity entry	Skeleton, spinner, dialog and drawer shell
Focus, menu, tooltip, density switcher	Table header, row, sortable header, filters, pagination	Partial-failure and stale-state treatment

Component contract

Every component ships with visual variants, state properties, responsive behavior, content limits, keyboard/focus order and accessibility notes—not just a happy-path screenshot.

No evidence captured yet

First use is not an error. Explain the next useful action and preserve the user’s context.

Design discipline

Do not let the interface claim more certainty than the research earns.

Do

Place evidence beside the claim it supports.
Use text and icons with semantic color.
Keep uncertainty and contradictions visible.
Label actions by their consequence.
Preserve work and partial results after failure.

Do not

Hide provenance behind a generic source count.
Use opaque confidence scores or color-only status.
Invent metrics or fill the product with decorative charts.
Turn every block into a floating card.
Animate routine evidence browsing for effect.

Research basis

Transferable standards, original product direction.

The system is an original recommendation informed by official accessibility and component guidance: WCAG 2.2, GOV.UK Design System, USWDS, IBM Carbon, and Atlassian Design System.