Summary
This is your reference when you need container queries, `calc-size()` for animating to auto heights, or OKLCH colors instead of HSL. It covers the modern stuff that actually shipped: view transitions, scroll-driven animations, anchor positioning, `text-wrap: balance`, and the new dynamic viewport units. Also handles newer HTML like customizable selects and popover attributes. Reach for this when refactoring old flexbox hacks or when you're starting fresh and don't want to write CSS like it's 2015. The cascade layers section alone will save you from specificity hell on larger projects.
Install to Claude Code
npx -y skills add paulirish/dotfiles --skill modern-css --agent claude-codeInstalls into .claude/skills of the current project.
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Files
SKILL.md
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Featured
Plug Mailtrap into your AI workflow and let it handle the email.
Connect Mailtrap MCP →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →Make coding agent sessions - Searchable, Shareable, Vendor-neutral & Scored.
Try For Free →Your agent targets a perfect 10 Code Health score. Deterministic. Every commit.
Try For Free →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →
