Responsive web design

Skill secondsky/claude-skills/plugins/responsive-web-design/skills/responsive-web-design

Production-ready skills for Claude Code CLI - Cloudflare, React, Tailwind v4, and AI integrations

Install

npx -y skills add secondsky/claude-skills --skill responsive-web-design

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

What its author says it does

Copied from the file, not written here

Builds adaptive web interfaces using Flexbox, CSS Grid, and media queries with a mobile-first approach. Use when creating multi-device layouts, implementing flexible UI systems, or ensuring cross-browser compatibility.

The file declares its own license as MIT. That is the author’s claim about this one file, and it is not the same thing as the license GitHub reports for the repository, which is listed with the other numbers below.

SKILL.md

2.0 KB, 543 tokens by cl100k_base, as published. Nobody here has run it

Responsive Web Design

Build adaptive interfaces using modern CSS techniques for all screen sizes.

Mobile-First Media Queries

/* Base: Mobile (320px+) */
.container {
  padding: 1rem;
}

/* Tablet (640px+) */
@media (min-width: 640px) {
  .container {
    padding: 2rem;
    max-width: 640px;
    margin: 0 auto;
  }
}

/* Desktop (1024px+) */
@media (min-width: 1024px) {
  .container {
    max-width: 1024px;
  }
}

Flexible Grid

.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr; /* Mobile: single column */
}

@media (min-width: 640px) {
  .grid {
    grid-template-columns: repeat(2, 1fr); /* Tablet: 2 columns */
  }
}

@media (min-width: 1024px) {
  .grid {
    grid-template-columns: repeat(3, 1fr); /* Desktop: 3 columns */
  }
}

Fluid Typography

/* Scales smoothly between breakpoints */
h1 {
  font-size: clamp(1.5rem, 4vw, 3rem);
}

p {
  font-size: clamp(1rem, 2vw, 1.25rem);
}

Responsive Images

img {
  max-width: 100%;
  height: auto;
}

.hero-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

Flexbox Navigation

.nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

@media (min-width: 768px) {
  .nav {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

Best Practices

Start with mobile styles first
Use flexible units (%, rem, vw)
Test on real devices
Ensure minimum 48px touch targets
Maintain readable line lengths (45-75 chars)
Use CSS Grid for 2D layouts, Flexbox for 1D

Resources

What ships with it

Read from the repository

Just SKILL.md. No reference files, no scripts.