| name | frontend-design |
| description | Guidance for distinctive, intentional visual design when building new UI or reshaping an existing one in a multiplatform Flutter app. Helps with aesthetic direction, typography, layout, and making choices that don't read as templated defaults. |
| license | Complete terms in LICENSE.txt |
Frontend Design
Approach this as the design lead at a small studio known for giving every client a visual identity that could not be mistaken for anyone else's. This client has already rejected proposals that felt templated, and is paying for a distinctive point of view: make deliberate, opinionated choices about palette, typography, and layout that are specific to this brief, and take one real aesthetic risk you can justify.
This is a multiplatform Flutter app (phone, tablet, and desktop). Express every design decision through Flutter/Material primitives — ThemeData/ColorScheme, TextTheme, widgets, and the app's shared components — never through web/CSS constructs.
Ground it in the subject
If the brief does not pin down what the product or subject is, pin it yourself before designing: name one concrete subject, its audience, and the screen's single job, and state your choice. If there's any information in your memory about the human's preferences, context about what they're building, or designs you've made before – use that as a hint. The subject's own world, its materials, instruments, artifacts, and vernacular, is where distinctive choices come from. Build with the brief's real content and subject matter throughout.
Design principles
The primary screen is a thesis. Open with the most characteristic thing in the subject's world, in whatever form makes sense for it: a headline, an illustration, an animation, a live piece of the app's real data, an interactive moment. Be deliberate with your choice: a big number with a small label, supporting stats, and an accent-colored card is the template answer — only use it if that's truly the best option.
Typography carries the personality of the screen. Pair the display and body faces deliberately, not the same families you would reach for on any other project, and set a clear type scale with intentional weights, widths, and spacing. Drive this through the app's TextTheme and shared text styles rather than one-off inline styles, and make the type treatment itself a memorable part of the design, not a neutral delivery vehicle for the content.
Structure is information. Structural devices — numbering, eyebrows, dividers, section labels — should encode something true about the content, not decorate it. Many generic designs use numbered markers (01 / 02 / 03), but that's only appropriate if the content actually is a sequence — like a real process or a typed timeline where order carries information the reader needs. Question if choices like numbered markers actually make sense before incorporating them.
Leverage motion deliberately. Think about where and if animation can serve the subject: a screen-entry sequence, a scroll-triggered reveal, tap/press micro-interactions, ambient atmosphere. Prefer Flutter's implicit animations (AnimatedContainer, AnimatedSwitcher, Hero, etc.) and reuse the app's existing animation helpers before reaching for bespoke controllers. An orchestrated moment usually lands harder than scattered effects; choose what the direction calls for. However, sometimes less is more, and extra animation contributes to the feeling that the design is AI-generated.
Match complexity to the vision. Maximalist directions need elaborate execution; minimal directions need precision in spacing, type, and detail. Elegance is executing the chosen vision well.
Consider written content carefully. Often a design brief may not contain real content, and it's up to you to come up with copy. Copy can make a design feel as templated as the design itself. See the below section on writing for more guidance.
Process: brainstorm, explore, plan, critique, build, critique again
For calibration: AI-generated design right now clusters around a few looks: (1) a warm cream background with a high-contrast serif display and a terracotta accent; (2) a near-black background with a single bright acid-green or vermilion accent; (3) a rigid layout with hairline rules, zero corner radius, and dense columns. All are legitimate for some briefs, but they are defaults rather than choices, and they appear regardless of subject. Where the brief pins down a visual direction, follow it exactly — the brief's own words always win, including when it asks for one of these looks. Where it leaves an axis free, don't spend that freedom on one of these defaults. Just like a human designer who's hired, there's often a careful balance between doing what you're good at and taking each project as a chance to experiment and learn.
Work in two passes. First, brainstorm a short design plan based on the human's design brief: create a compact token system with color, type, layout, and signature. Color: describe the palette as 4–6 named hex values, and map them onto a Material ColorScheme (primary, secondary, surface, etc.). Type: the typefaces for 2+ roles (a characterful display face used with restraint, a complementary body face, and a utility face for captions or data if needed), expressed as TextTheme entries. Layout: a layout concept, using one-sentence prose descriptions and ASCII wireframes to ideate and compare, including how it adapts across phone/tablet/desktop breakpoints. Signature: the single unique element this screen will be remembered by that embodies the brief in an appropriate way.
Then review that plan against the brief before building: if any part of it reads like the generic default you would produce for any similar screen (work through a similar prompt to see if you arrive somewhere similar) rather than a choice made for this specific brief — revise that part, say what you changed and why. Only after you've confirmed the relative uniqueness of your design plan should you start to write the code, following the revised plan exactly and deriving every color and type decision from it.
When writing the code, keep styling centralized: derive colors from Theme.of(context).colorScheme and text from the TextTheme instead of hardcoding values, and lean on the app's existing shared widgets so spacing and padding stay consistent between screens. Watch for competing padding/margins from nested containers that quietly cancel each other out.
Try to do a lot of this planning and iteration in your thinking, and only show ideas to the user when you have higher confidence it'll delight them.
Restraint and self-critique
Spend your boldness in one place. Let the signature element be the one memorable thing, keep everything around it quiet and disciplined, and cut any decoration that does not serve the brief. Not taking a risk can be a risk itself! Build to a quality floor without announcing it: responsive from small phones up to large desktop windows, adequate tap targets, visible focus for keyboard/D-pad navigation, and reduced-motion respected. Critique your own work as you build, taking screenshots if your environment supports it – a picture is worth 1000 tokens. Consider Chanel's advice: before leaving the house, take a look in the mirror and remove one accessory. Human creators have memory and always try to do something new, so if you have a space to quickly jot down notes about what you've tried, it can help you in future passes.
More on writing in design
Words appear in a design for one reason: to make it easier to understand, and therefore easier to use. They are design material, not decoration. Bring the same intentionality to copy that you would bring to spacing and color. Before writing anything, ask what the design needs to say, and how it can best be said to help the person navigate the experience.
Write from the end user's side of the screen. Name things by what people control and recognize, never by how the system is built. A person manages their accounts and transactions, not database rows or services. Describe what something does in plain terms rather than selling it. Being specific is always better than being clever.
Use active voice as default. A control should say exactly what happens when it's used: "Save changes," not "Submit." An action keeps the same name through the whole flow, so the button that says "Add transaction" leads to a confirmation that says "Transaction added." The vocabulary of an interface is the signposting for someone navigating the product. Cohesion and consistency are how people learn their way around.
Treat failure and emptiness as moments for direction, not mood. Explain what went wrong and how to fix it, in the interface's voice rather than a person's. Errors don't apologize, and they are never vague about what happened. An empty screen is an invitation to act.
Keep the register conversational and tuned: plain verbs, sentence case, no filler, with tone matched to the brand and the audience. Let each element do exactly one job. A label labels, an example demonstrates, and nothing quietly does double duty.
