CSS Grid Layout Breaking on Small Screens in Cursor App
Your Cursor-generated CSS Grid layout looks great on desktop but completely breaks on mobile screens. Grid items overflow horizontally, content gets cut off, columns become impossibly narrow, or the layout collapses into an unreadable single column with wrong proportions.
CSS Grid is powerful but requires careful handling of responsive behavior. Cursor often generates grid layouts optimized for the desktop view you described in your prompt, using fixed column counts or pixel-based track sizes that don't adapt to smaller viewports. The grid might use grid-template-columns: repeat(4, 1fr) which creates four equal columns even on a 320px screen.
The issue manifests as horizontal scrolling, overlapping text, images squeezed to unusable sizes, or grid items that stack but retain incorrect heights and spacing from the desktop layout.
Error Messages You Might See
Common Causes
- Fixed column count without responsive breakpoints — Using
repeat(4, 1fr)orrepeat(3, 250px)which forces the same number of columns on all screen sizes - No minmax() usage — Grid tracks use fixed sizes instead of
minmax(min, max)which would allow them to shrink and grow - Grid gap too large for mobile — A gap of 32px or 48px that's fine on desktop eats into content space on a 375px screen
- Fixed pixel widths on grid items — Grid children have hardcoded width values that exceed the grid track size on small screens
- Auto-fill vs auto-fit confusion — Cursor used
auto-fillwhenauto-fitwas needed, or vice versa, causing empty tracks or content not stretching - Missing overflow handling on grid items — Text or images inside grid items overflow their boundaries without wrapping or scaling
How to Fix It
- Use auto-fit with minmax() — Replace fixed column counts with
grid-template-columns: repeat(auto-fit, minmax(280px, 1fr))which automatically adjusts column count based on available space - Add responsive grid breakpoints — Use media queries to change the grid: 1 column on mobile (<768px), 2 on tablet, 3-4 on desktop
- Scale gap with viewport — Use
gap: clamp(1rem, 2vw, 2rem)or responsive gap values in media queries so spacing adapts to screen size - Set max-width: 100% on grid children — Prevent images, tables, and other content from overflowing grid cells with
max-width: 100%; overflow: hidden; - Test at key breakpoints — Check your grid at 320px (iPhone SE), 375px (iPhone), 768px (tablet), and 1024px+ (desktop) in DevTools
- Consider Flexbox for simple layouts — If your layout is a single row that wraps,
display: flex; flex-wrap: wrap;may be simpler and more robust than Grid
Real developers can help you.
rayush33
JavaScript (React.js, React Native, Node.js) Developer with demonstrated industry experience of 4+ years, actively looking for opportunities to hone my skills as well as help small-scale business owners with solutions to technical problems
Mehdi Ben Haddou
- Founder of Chessigma (1M+ users) & many small projects
- ex Founding Engineer @Uplane (YC F25)
- ex Software Engineer @Amazon and @Booking.com
legrab
I'll fill this later
MFox
Full-stack professional senior engineer (15+years). Extensive experience in software development, qa, and IP networking.
Prakash Prajapati
I’m a Senior Python Developer specializing in building secure, scalable, and highly available systems. I work primarily with Python, Django, FastAPI, Docker, PostgreSQL, and modern AI tooling such as PydanticAI, focusing on clean architecture, strong design principles, and reliable DevOps practices. I enjoy solving complex engineering problems and designing systems that are maintainable, resilient, and built to scale.
Franck Plazanet
I am a Strategic Engineering Leader with over 8 years of experience building high-availability enterprise systems and scaling high-performing technical teams. My focus is on bridging the gap between complex technology and business growth.
Core Expertise:
🚀 Leadership: Managing and coaching teams of 15+ engineers, fostering a culture of accountability and continuous improvement.
🏗️ Architecture: Enterprise Core Systems, Multi-system Integration (ERP/API/ETL), and Core Database Structure.
☁️ Cloud & Scale: AWS Expert; architected systems handling 10B+ monthly requests and managing 100k+ SKUs.
📈 Business Impact: Aligning tech strategy with P&L goals to drive $70k+ in monthly recurring revenue.
I thrive on "out-of-the-box" thinking to solve complex technical bottlenecks and am always looking for ways to use automation to improve business productivity.
Pratik
SWE with 15+ years of experience building and maintaining web apps and extensive BE infrastructure
Richard McSorley
Full-Stack Software Engineer with 8+ years building high-performance applications for enterprise clients. Shipped production systems at Walmart (4,000+ stores), Cigna (20M+ users), and Arkansas Blue Cross. 5 patents in retail/supply chain tech. Currently focused on AI integrations, automation tools, and TypeScript-first architectures.
Simon A.
I'm a backend developer building APIs, emulators, and interactive game systems. Professionally, I've developed Java/Spring reporting solutions, managed relational and NoSQL databases, and implemented CI/CD workflows.
Sage Fulcher
Hey I'm Sage! Im a Boston area software engineer who grew up in South Florida. Ive worked at a ton of cool places like a telehealth kidney care startup that took part in a billion dollar merger (Cricket health/Interwell health), a boutique design agency where I got to work on a ton of exciting startups including a photography education app, a collegiate Esports league and more (Philosophie), a data analytics as a service startup in Cambridge (MA) as well as at Phillips and MIT Lincoln Lab where I designed and developed novel network security visualizations and analytics. I've been writing code and furiously devoted to using computers to make people’s lives easier for about 17 years. My degree is in making computers make pretty lights and sounds. Outside of work I love hip hop, the Celtics, professional wrestling, magic the gathering, photography, drumming, and guitars (both making and playing them)
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
What is the difference between auto-fill and auto-fit?
auto-fill creates as many tracks as will fit, even if they're empty. auto-fit collapses empty tracks so remaining items stretch to fill the row. For most responsive layouts, auto-fit is what you want because it ensures items fill the available width.
Should I use CSS Grid or Flexbox for responsive layouts?
Use Grid for two-dimensional layouts (rows AND columns) like card grids, dashboards, and page layouts. Use Flexbox for one-dimensional layouts (a single row or column) like navigation bars, button groups, or card content. Many responsive designs use both together.