What is responsive-design?

A set of responsive layout rules for Tailwind CSS. Responsive design means a page rearranges and resizes itself for phones, tablets, and larger screens.

Building mobile-first spacing, responsive grids and typography, elements that appear only at certain sizes, changing column layouts, and centered content containers.

It helps prevent layouts, text, grids, and sidebars from breaking when the screen size changes.

responsive-design — Cursor rule by Farzannajipour

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add rules/farzannajipour/cursor-react-rules/responsive-design

Clone the repo

git clone --depth 1 https://github.com/Farzannajipour/cursor-react-rules

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.

When invoked 827 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5	$0.00000	$0.00827
Opus 5	$0.00000	$0.00413
Sonnet 5	$0.00000	$0.00165
Haiku 4.5	$0.00000	$0.00083

Measured yesterday against content hash b076434e3af9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

responsive-design scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.cursor/rules/responsive-design.mdc · 141 lines

How it starts

The opening of the file, as written. The whole thing — 141 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Responsive Design Patterns

Mobile-First Approach

Start with mobile styles, then add larger breakpoints:

// Mobile first
<div className="p-4 sm:p-6 lg:p-8">
  {/* Padding increases on larger screens */}
</div>

Tailwind Breakpoints

sm: 640px
md: 768px
lg: 1024px
xl: 1280px
2xl: 1536px

Common Patterns

Responsive Grid

<div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-4">
  {items.map(item => <Card key={item.id} />)}
</div>

Responsive Typography

<h1 className="text-2xl sm:text-3xl lg:text-4xl font-bold">
  Responsive Heading
</h1>

Hide/Show Elements

// Hide on mobile
<div className="hidden lg:block">Desktop only</div>

// Show on mobile
<div className="block lg:hidden">Mobile only</div>

Responsive Flex

<div className="flex flex-col lg:flex-row gap-4">
  <div className="lg:w-1/3">Sidebar</div>
  <div className="lg:w-2/3">Content</div>
</div>

Responsive Container

<div className="container mx-auto px-4 sm:px-6 lg:px-8">
  <div className="max-w-4xl mx-auto">
    {/* Content */}
  </div>
</div>

Touch Targets

Minimum 44x44px for mobile:

<button className="p-3 min-h-[44px] min-w-[44px] touch-manipulation">
  <Icon className="w-6 h-6" />
</button>

Responsive Images

import Image from 'next/image';

<div className="relative aspect-video w-full">
  <Image
    src="/image.jpg"
    alt="Description"
    fill
    className="object-cover"
    sizes="(max-width: 768px) 100vw, (max-width: 1200px) 50vw, 33vw"
  />
</div>

Responsive Forms

<form className="space-y-4">
  <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
    <input className="w-full px-3 py-2" />
    <input className="w-full px-3 py-2" />
  </div>
  <button className="w-full sm:w-auto px-6 py-3">
    Submit
  </button>
</form>

Read the full file on GitHub · 141 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

yesterday First seen · 141 lines · 0 tokens per session scan A b076434e3af9

Subscribe to this mod's changes

responsive-design is a cursor rule published in the GitHub repository Farzannajipour/cursor-react-rules (2 stars, last pushed 7mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 827 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Frontend Mobile Writing and docs

responsive-design