Responsive Web Design Skill for Claude

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.

515 tokens

context cost

the whole folder, loaded on every use

files

instructions only

copies elsewhere

how many repositories repackaged it

202

stars on the repo

on the repository, not the skill itself

Install

one command, takes just this skill from the repository

npx skills add https://github.com/secondsky/claude-skills --skill responsive-web-design

The instruction itself

8 sections, as written by the author

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;
}

.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

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different authors, same section of the catalogue

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