Cursor will happily restyle your entire app in one pass. The catch is that the quality of what you get back is almost entirely determined by the quality of what you ask for. "Make the design better" produces a slightly different flavor of the same design. "Set body text to 17px with 1.6 line height and increase section spacing to 96px" produces an actual improvement.
The difference is specificity. Vague prompts hand the design decisions back to the model, and the model's default taste is what made your app look generic in the first place. Specific prompts make the model execute decisions instead of averaging its own.
Here are ten prompts that fix the most common UI problems in AI-built apps. Each one is paste-ready — copy it into Cursor's agent, adjust the values to your project, and let it run. They work in Composer and chat alike, and most translate directly to Lovable, v0, or Bolt with minor wording changes.
1. Fix the typography hierarchy
Audit the typographic scale across the app. Set page titles to text-5xl font-semibold with tracking-tight, section headings to text-2xl font-semibold, and body text to 17px with leading-relaxed. Remove any heading that is the same size and weight as the text near it — every level of the hierarchy should be visually distinct at a glance. Do not change any copy.
Why it works: AI-generated apps ship everything at three timid sizes with uniform weight, so nothing looks more important than anything else. Forcing distinct steps between levels is the single fastest visual upgrade available.
2. Establish a real spacing rhythm
Normalize spacing across the app using an 8px base unit. Inside components, keep related elements tightly grouped (8–16px apart). Between distinct sections, use generous spacing (80–120px). Remove any place where the gap inside a group equals the gap between groups — internal spacing must always be visibly smaller than external spacing.
Why it works: Generated layouts pad everything uniformly, which flattens the page into visual porridge. Unequal spacing is how designers signal what belongs together without drawing a single line.
3. Retire the gradient hero
Remove all background gradients from the app. Replace the hero background with a solid warm off-white (#FAF9F6 or similar), make the headline the dominant visual element by increasing its size, and limit color to a single accent used only on the primary CTA button.
Why it works: The soft gradient hero is the strongest "AI made this" tell of all. A confident type-led hero on a quiet background reads as designed; a gradient reads as filler.
4. Make the primary CTA unmissable
Identify the single most important action on each screen. Style only that action as a solid filled button in the brand accent color. Convert every other button on the same screen to a ghost or outline style. No screen should have two solid filled buttons competing for attention.
Why it works: When every button is loud, none of them are. One dominant action per screen is one of the oldest conversion findings in the book, and AI builders violate it constantly.
5. Reduce the card clutter
Review every card component in the app. Where a card contains content that flows as a single unit with what surrounds it, remove the card wrapper and use spacing to separate the group instead. For the cards that remain, replace drop shadows with a 1px border in a subtle neutral tone.
Why it works: The floating-card-on-gray-canvas reflex fragments your interface into disconnected boxes. Fewer, flatter containers make a layout feel intentional instead of templated.
6. Fix low-contrast text
Find all text using gray-400 or lighter for body copy or labels, and darken it to meet at least a 4.5:1 contrast ratio against its background. Keep genuinely secondary text (timestamps, captions) at gray-500 minimum. Do not lighten anything.
Why it works: Models love pale gray text because it looks "clean" in isolation. Real users on real screens in real lighting can't read it, and it quietly fails accessibility standards you'll have to fix eventually anyway.
7. Tame the border radius
Standardize border radius across the app to exactly two values: one small radius (6–8px) for buttons, inputs, and small elements, and one larger radius (12–16px) for cards and containers. Remove any fully-rounded pill shapes except badges and avatars.
Why it works: Generated UIs mix four or five radii on one screen, which reads as sloppy even when nobody can name why. Two consistent values create the coherence that expensive-looking products have.
8. Clean up the empty states
Find every empty state in the app (no data, no results, first use). Replace any bare "No items found" text with a proper empty state: a short headline explaining what will appear here, one sentence of guidance, and a button for the most useful next action.
Why it works: New users meet your empty states before they meet your features. AI builders skip them entirely, and it's one of the clearest differences between a demo and a product.
9. Make loading feel intentional
Replace all spinner-only loading states with skeleton screens that match the layout of the content being loaded. Keep skeletons subtle — a light shimmer on neutral shapes — and make sure layout does not jump when real content arrives.
Why it works: Spinners communicate "waiting"; skeletons communicate "almost there." Layout shift on load is also one of the most common polish failures in vibe-coded apps, and this fixes both at once.
10. Run a consistency pass
Do a full consistency audit: list every distinct button style, text size, spacing value, color, and icon size used across the app. Then consolidate — each category should use the smallest set of values that covers all cases. Show me the before/after inventory as a table before making changes.
Why it works: Inconsistency accumulates invisibly, one generated component at a time. The inventory step matters as much as the fix: it makes the model look before it edits, which produces dramatically better results than "make everything consistent."
The pattern behind all ten
Notice what these prompts have in common: exact values, explicit constraints, and a clear definition of done. None of them ask Cursor to have taste. They ask it to execute decisions.
That's the real skill in vibe-coding a good-looking app — and it's also the hard part. These ten prompts fix the problems most AI-built apps share, but your app has its own specific issues: the contrast failure on your pricing page, the hierarchy problem in your onboarding, the CTA that's invisible on mobile. Generic prompts can't find those. Someone — or something — has to look at your actual screens first.
That diagnostic step is what Klyxx does. Upload a screenshot or URL and it audits your interface across sixteen design dimensions, then generates fix prompts like the ones above — except written for your findings, ranked by severity, and tuned for the tool you're pasting them into, whether that's Cursor, Lovable, v0, or Bolt.
Get fix prompts written for your app, not everyone's. Run a Klyxx audit and get severity-ranked findings with paste-ready prompts for your editor in under a minute. Try Klyxx free.
Prompt libraries are a good start. An audit of your actual interface is the finish.