tailwindlabs/tailwindcss v4.0.0-alpha.35 on GitHub

Reintroduce max-w-screen-* utilities that read from the --breakpoint namespace as deprecated utilities (#15013)
Support using CSS variables as arbitrary values without var(…) by using parentheses instead of square brackets (e.g. bg-(--my-color)) (#15020)
Add new in-* variant (#15025)
Bundle @tailwindcss/forms, @tailwindcss/typography, and @tailwindcss/aspect-ratio with the standalone CLI (#15028)
Allow addUtilities() and addComponents() to work with child combinators and other complex selectors (#15029)
Support colors that use <alpha-value> in JS configs and plugins (#15033)
Add new transition-discrete and transition-normal utilities for transition-behavior (#15051)
Upgrade (experimental): Migrate [&>*] to the * variant (#15022)
Upgrade (experimental): Migrate [&_*] to the ** variant (#15022)
Upgrade (experimental): Warn when trying to migrating a project that is not on Tailwind CSS v3 (#15015)
Upgrade (experimental): Migrate colors that use <alpha-value> in JS configs (#15033)

Ensure flex is suggested (#15014)
Improve module resolution for cjs-only and esm-only plugins (#15041)
Perform calc(…) on just values for negative -rotate-* utilities, not on the rotateX/Y/Z(…) functions themselves (#15044)
Upgrade (experimental): Resolve imports when specifying a CSS entry point on the command-line (#15010)
Upgrade (experimental): Resolve nearest Tailwind config file when CSS file does not contain @config (#15001)
Upgrade (experimental): Improve output when CSS imports can not be found (#15038)
Upgrade (experimental): Ignore analyzing imports with external URLs (e.g.: @import "https://fonts.google.com") (#15040)
Upgrade (experimental): Ignore analyzing imports with url(…) (e.g.: @import url("https://fonts.google.com")) (#15040)
Upgrade (experimental): Use resolveJsId when resolving tailwindcss/package.json (#15041)
Upgrade (experimental): Ensure children of Tailwind root file are not considered Tailwind root files (#15048)

Bring back support for color opacity modifiers to read from --opacity-* theme values (#14278)