Modern CSS
Modern CSS features you can use today
A practical look at container queries, :has(), nesting, cascade layers, logical properties,
and the support decisions that make them useful in production.
Modern frontend notes
Modern CSS, in practice.
Practical guides to modern CSS, native HTML, and the custom code you may no longer need.
Start with the code you already have.
How to replace JavaScript with HTML and CSS
Use <details>, <dialog>, popovers, inert, and CSS state
without pretending every script can disappear.
How to run a modern CSS audit
A repeatable way to find old workarounds, capture evidence, check browser support, and modernize a website without turning the audit into a rewrite.
Check a real page.
CSS Radar scans one public URL and shows modern HTML and CSS replacements backed by captured evidence.