chore(deps): update dependency tailwindcss to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
tailwindcss (source)	^3.4.17 -> ^4.0.9

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Release Notes

tailwindlabs/tailwindcss (tailwindcss)

v4.0.9

Compare Source

Fixed

• Make JS APIs available to plugins and configs in the Standalone CLI (#​15934)
• Vite: Don't crash when importing a virtual module from JavaScript that ends in .css (#​16780)
• Fix an issue where @reference "…" would sometimes omit keyframe animations (#​16774)
• Ensure z-*! utilities are properly marked as !important (#​16795)
• Read UTF-8 CSS files that start with a byte-order mark (BOM) (#​16796)
• Ensure nested functions in selectors used with JavaScript plugins are not truncated (#​16802)

Changed

• Emit variable fallbacks when using @reference "…" instead of duplicate CSS variable declarations (#​16774)

v4.0.8

Compare Source

Added

• Allow @import with theme(…) options for stylesheets that contain more than just @theme rules (#​16514)

Fixed

• Don't add !important to CSS variable declarations when using the important modifier (#​16668)
• Vite: Ignore files and directories specified in your .gitignore file when using automatic source detection(#​16631)
• Vite: Don't rely on the module graph for detecting candidates to ensure setups with multiple Vite builds work as expected (#​16631)
• Vite: Ensure Astro production builds always contain classes used in client-only components (#​16631)
• Vite: Always scan raw file contents for utility classes before any other transforms have been applied to ensure utility classes are scanned without any additional escaping (#​16631)
• Ensure utilities with more declarations are always sorted before utilities with fewer declarations when utilities only define CSS variables (#​16715)
• Only include translate-z-px utilities once in compiled CSS (#​16718)

Changed

• Don't include theme variables that aren't used in compiled CSS (#​16211, #​16676)

v4.0.7

Compare Source

Fixed

• Export tailwindcss/lib/util/flattenColorPalette.js for backward compatibility (#​16411)
• Fix sorting of numeric utility suggestions when they have different magnitudes (#​16414)
• Show suggestions for fractions in IntelliSense (#​16353)
• Don’t replace _ in suggested theme keys (#​16433)
• Ensure --default-outline-width can be used to change the outline-width value of the outline utility (#​16469)
• Ensure drop shadow utilities don't inherit unexpectedly (#​16471)
• Export config and plugin types from tailwindcss/plugin for backward compatibility (#​16505)
• Ensure JavaScript plugins that emit nested rules referencing the utility name work as expected (#​16539)
• Statically link Visual Studio redistributables in @tailwindcss/oxide Windows builds (#​16602)
• Ensure that Next.js splat routes are scanned for classes (#​16457)
• Pin exact version of tailwindcss in @tailwindcss/* packages (#​16623)
• Upgrade: Report errors when updating dependencies (#​16504)
• Upgrade: Ensure a darkMode JS config setting with block syntax converts to use @slot (#​16507)
• Upgrade: Ensure the latest version of tailwindcss and @tailwindcss/postcss are installed when upgrading (#​16620)

v4.0.6

Compare Source

Fixed

• Revert change to no longer include theme variables that aren't used in compiled CSS (#​16403)
• Upgrade: Don't migrate blur to blur-sm when used with Next.js <Image placeholder="blur" /> (#​16405)

v4.0.5

Compare Source

Added

• Add @theme static option for always including theme variables in compiled CSS (#​16211)

Fixed

• Remove rogue console.log from @tailwindcss/vite (#​16307)

Changed

• Don't include theme variables that aren't used in compiled CSS (#​16211)

v4.0.4

Compare Source

Fixed

• Fix a crash when setting JS theme values to null (#​16210)
• Ensure escaped underscores in CSS variables in arbitrary values are properly unescaped (#​16206)
• Ensure that the containers JS theme key is added to the --container-* namespace (#​16169)
• Ensure theme @keyframes are generated even if an --animation-* variable spans multiple lines (#​16237)
• Vite: Skip parsing stylesheets with the ?commonjs-proxy flag (#​16238)
• Fix order-first and order-last for Firefox (#​16266)
• Fix support for older instruction sets on Linux x64 builds of the standalone CLI (#​16244)
• Ensure NODE_PATH is respected when resolving JavaScript and CSS files (#​16274)
• Ensure Node addons are packaged correctly with FreeBSD builds (#​16277)
• Fix an issue where @variant inside a referenced stylesheet could cause a stack overflow (#​16300)

v4.0.3

Compare Source

Fixed

• Fix incorrect removal of @import url(); (#​16144)

v4.0.2

Compare Source

Fixed

• Only generate positive grid-cols-* and grid-rows-* utilities (#​16020)
• Ensure escaped theme variables are handled correctly (#​16064)
• Ensure we process Tailwind CSS features when only using @reference or @variant (#​16057)
• Refactor gradient implementation to work around prettier/prettier#17058 (#​16072)
• Vite: Ensure hot-reloading works with SolidStart setups (#​16052)
• Vite: Fix a crash when starting the development server in SolidStart setups (#​16052)
• Vite: Don't rebase URLs that appear to be aliases (#​16078)
• Vite: Transform <style> blocks in HTML files (#​16069)
• Prevent camel-casing CSS custom properties added by JavaScript plugins (#​16103)
• Do not emit @keyframes in @theme reference (#​16120)
• Discard invalid declarations when parsing CSS (#​16093)
• Do not emit empty CSS rules and at-rules (#​16121)
• Handle @variant when at the top-level of a stylesheet (#​16129)

v4.0.1

Compare Source

Added

• Include :open pseudo-class in existing open variant (#​15349)

Fixed

• Remove invalid min-w/h-none utilities (#​15845)
• Discard CSS variable shorthand utilities that don't use valid CSS variables (#​15738)
• Ensure font-size utilities with none modifier have a line-height set e.g. text-sm/none (#​15921)
• Ensure font-size utilities with unknown modifier don't generate CSS (#​15921)
• Don’t suggest font weight utilities more than once (#​15857)
• Suggest container query variants (#​15857)
• Disable bare value suggestions when not using the --spacing variable (#​15857)
• Ensure suggested classes are properly sorted (#​15857)
• Don’t look at .gitignore files outside initialized repos (#​15941)
• Find utilities when using the Svelte class shorthand syntax across multiple lines (#​15974)
• Find utilities when using the Angular class shorthand syntax (#​15974)
• Find utilities when using functions inside arrays (#​15974)
• Ensure that @tailwindcss/browser does not pollute the global namespace (#​15978)
• Ensure that tailwind-merge is not scanned when using the Vite plugin (#​16005)
• Ensure CSS theme variables are available within shadow roots (#​15975)
• Fix crash when project lives in the / directory (#​15988)
• Ensure custom variants have a non-empty selector list (#​16009)
• Upgrade: Ensure JavaScript config files on different drives are correctly migrated (#​15927)
• Upgrade: Migrate leading-[1] to leading-none (#​16004)
• Upgrade: Do not migrate arbitrary leading utilities to bare values (#​16004)

v4.0.0

Compare Source

Added

• New high-performance engine — where full builds are up to 5x faster, and incremental builds are over 100x faster — and measured in microseconds.
• Designed for the modern web — built on cutting-edge CSS features like cascade layers, registered custom properties with @property, and color-mix().
• Simplified installation — fewer dependencies, zero configuration, and just a single line of code in your CSS file.
• First-party Vite plugin — tight integration for maximum performance and minimum configuration.
• Automatic content detection — all of your template files are discovered automatically, with no configuration required.
• Built-in import support — no additional tooling necessary to bundle multiple CSS files.
• CSS-first configuration — a reimagined developer experience where you customize and extend the framework directly in CSS instead of a JavaScript configuration file.
• CSS theme variables — all of your design tokens exposed as native CSS variables so you can access them anywhere.
• Dynamic utility values and variants — stop guessing what values exist in your spacing scale, or extending your configuration for things like basic data attributes.
• Modernized P3 color palette — a redesigned, more vivid color palette that takes full advantage of modern display technology.
• Container queries — first-class APIs for styling elements based on their container size, no plugins required.
• New 3D transform utilities — transform elements in 3D space directly in your HTML.
• Expanded gradient APIs — radial and conic gradients, interpolation modes, and more.
• @​starting-style support — a new variant you can use to create enter and exit transitions, without the need for JavaScript.
• not-* variant — style an element only when it doesn't match another variant, custom selector, or media or feature query.
• Even more new utilities and variants — including support for color-scheme, field-sizing, complex shadows, inert, and more.

Start using Tailwind CSS v4.0 today by installing it in a new project, or playing with it directly in the browser on Tailwind Play.

For existing projects, we've published a comprehensive upgrade guide and built an automated upgrade tool to get you on the latest version as quickly and painlessly as possible.

For a deep-dive into everything that's new, check out the announcement post.

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