• flexbox
• CSS grid
• CSS Custom properties
• Preference Queries
• Color changes
• Variable fonts
• Paths
• CSS filters
• Houdini
• Shadow DOM
• Native CSS modules

And coming: container queries, container units, native nesting, scoping, cascade layers, :has() selector, @scroll-timeline

A stairwell is well suited for amplification :D

A big one !

Authentication middleware framework