CSS Modern Features

Q: What is a Claude Code skill and how does the CSS Modern Features skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. CSS Modern Features is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Product category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Product · Sub-category: product-misc · Last updated: 2026-05-21

fw:svelte type:review

Use this skill whenever writing, reviewing, or refactoring any CSS, whether in plain .css files, styled-components, CSS Modules, Tailwind arbitrary values, inline styles in React/Vue/Svelte, or any other frontend context. This skill ensures modern CSS features are used wherever browser support allows — things like clamp(), :has(), container queries, OKLCH colors, scroll-driven animations, anchor positioning, @starting-style, light-dark(), text-wrap: balance, and more. Trigger this skill any time CSS is being written or touched, even indirectly (e.g. a component that needs responsive sizing, a theme system, an animation, a layout). Do NOT default to legacy patterns like px-based media queries, JS-driven animations, or CSS-in-JS workarounds when a native modern CSS feature exists and is supported by the project's browser targets.

From the source SKILL.md

Write CSS that uses the most capable, expressive features available for the project's browser targets. Never reach for a legacy workaround when a modern native feature is supported.

What this skill does

CSS Modern Features is a community-contributed Claude Code skill in the product-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/css-modern-features/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The CSS Modern Features Claude Code skill is built for product managers, product designers, and cross-functional teams planning, shipping, and measuring product features. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 117,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/css-modern-features
curl -L https://claudskills.com/skills/css-modern-features/SKILL.md \
  -o ~/.claude/skills/css-modern-features/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/css-modern-features/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/css-modern-features/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\css-modern-features\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the CSS Modern Features Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/css-modern-features/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the CSS Modern Features skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the CSS Modern Features skill?

Use CSS Modern Features when your Claude Code task falls under the Product category — specifically in the product misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use CSS Modern Features" or describe the task and let Claude pick). Browse related skills at /category/product/.

What is a Claude Code skill and how does the CSS Modern Features skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. CSS Modern Features is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Product category. Learn more at /learn/what-is-a-claude-skill/.

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

ClaudSkills. (2026). CSS Modern Features [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/css-modern-features/

BibTeX

@misc{css-modern-features-2026,
  author    = {ClaudSkills},
  title     = {CSS Modern Features [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/css-modern-features/}
}

Embed this skill

Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →

Badge

[![ClaudSkills](https://claudskills.com/badge/css-modern-features.svg)](https://claudskills.com/skills/css-modern-features/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)

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