# Card-Based UI

DS121. Layout: Modular. Page: https://ui.codeatlas.com.br/atlas/card-based-ui/. Index: https://ui.codeatlas.com.br/llms/atlas.txt

Content split into self-contained, repeatable units.

- Status in 2026: Established. Documented and in wide use.
- Trend 2027 to 2030: Rising (an editorial projection, not a forecast).
- The term: Known technical term or standard.

## Traits

- cards
- shadow/border
- summary

Typical settings: Marketplaces, Feeds, SaaS.

## When to use it, and when not

Consider it when the task and motivation match: audiences that scan options. Typical settings: marketplaces, feeds, saas.

Be careful when the risk below would hurt the main task: fragmentation and repetition.

Audience (a hypothesis about motivation and task, never measured, not a statement about any group): Audiences that scan options.

## UX risk and how to reduce it

- Risk: Fragmentation and repetition.
- Mitigation and accessibility: Ensure the relationship between cards and summary.
- How to check: Test a prototype against a plain baseline on a real task: completion, time, errors, comprehension, accessibility and preference, segmented by context rather than by stereotype.

## Evidence

Indirect: the sources support underlying principles, not a preference for this style.

The sources support the principles that apply to this term. None shows that this style works better or is preferred.

- [E06] Wagemans, Elder, Kubovy, Palmer, Peterson, Singh, von der Heydt (2012). A century of Gestalt psychology in visual perception: I. Perceptual grouping and figure-ground organization. https://doi.org/10.1037/a0029333 (Established). Does not support: Any claim about interface styles. It is a review of perception, not of screens, and says nothing about preference.
- [E14] Baymard Institute (2025). Product List UX 2025: 8 Common Pitfalls & Best Practices. https://baymard.com/research-articles/current-state-product-list-and-filtering (Preliminary). Does not support: Anything outside e-commerce product lists, or any visual style. The sample is Baymard's chosen sites and the scoring is theirs.

## Limits

- The atlas is a broad, living catalogue, not every style that exists. No authority enumerates them, and the classes (movement, aesthetic, design system, layout, pattern, principle) overlap.
- The 1 to 5 scores are relative editorial judgements. They are not results of a study and not a measure of quality.
- An audience is a hypothesis about motivation, task and context. It was never measured and says nothing about any age, gender or other group.
- The sources support underlying principles (visual complexity, legibility, grouping, accessibility, platform conventions). None shows that a particular style works better or is preferred.
- The 2027 to 2030 trend is an editorial projection, not a forecast.
- Terms in the Future / AI category rest on exploratory work, some of it preprints, with no causal validation.

Last reviewed 2026-10-25.

## Heuristic scales

Relative editorial judgements from 1 to 5, not results of a study.

- Visual complexity: 2 / 5 (heuristic)
- Expressiveness: 2 / 5 (heuristic)
- Information density: 3 / 5 (heuristic)

## In our library

No design-style recipe implements this term yet; build it from `--ca-*` tokens.

## Prompt for your AI

```text
Design this interface in the "Card-Based UI" direction (layout, modular): Content split into self-contained, repeatable units.
Visual and interaction traits to use: cards, shadow/border, summary.
Main UX risk: Fragmentation and repetition. Mitigate it: Ensure the relationship between cards and summary.
Keep it accessible to WCAG 2.2 AA: contrast, visible focus, keyboard operation, 24 px minimum targets, reflow at 320 CSS px and reduced motion.
Keep the content, hierarchy and behavior the same as a plain baseline so the two can be compared. Do not claim the style performs better; the choice should be validated with users.
```