The code returns the following error:
Error: Cannot apply unknown utility class `glass`
[at onInvalidCandidate (/vercel/share/v0-next-shadcn/node_modules/.pnpm/tailwindcss@4.2.0/node_modules/tailwindcss/dist/lib.js:21:1511)]
[at Ee (/vercel/share/v0-next-shadcn/node_modules/.pnpm/tailwindcss@4.2.0/node_modules/tailwindcss/dist/lib.js:16:36740)]
[at /vercel/share/v0-next-shadcn/node_modules/.pnpm/tailwindcss@4.2.0/node_modules/tailwindcss/dist/lib.js:21:355]
[at Pr (/vercel/share/v0-next-shadcn/node_modules/.pnpm/tailwindcss@4.2.0/node_modules/tailwindcss/dist/lib.js:3:1733)]
[at _ (/vercel/share/v0-next-shadcn/node_modules/.pnpm/tailwindcss@4.2.0/node_modules/tailwindcss/dist/lib.js:3:1377)]
[at Te (/vercel/share/v0-next-shadcn/node_modules/.pnpm/tailwindcss@4.2.0/node_modules/tailwindcss/dist/lib.js:21:172)]
[at pn (/vercel/share/v0-next-shadcn/node_modules/.pnpm/tailwindcss@4.2.0/node_modules/tailwindcss/dist/lib.js:38:294)]
[at async dn (/vercel/share/v0-next-shadcn/node_modules/.pnpm/tailwindcss@4.2.0/node_modules/tailwindcss/dist/lib.js:38:631)]
[at async Xr (/vercel/share/v0-next-shadcn/node_modules/.pnpm/@tailwindcss+node@4.2.0/node_modules/@tailwindcss/node/dist/index.js:10:3417)]
[at async N (/vercel/share/v0-next-shadcn/node_modules/.pnpm/@tailwindcss+postcss@4.2.0/node_modules/@tailwindcss/postcss/dist/index.js:10:3979)]
Revise the code to address the error.
The issue is that the .glass-hover class is trying to apply the .glass class using @apply, but the order of the @layer components blocks causes the second block to override the first. I need to consolidate the custom components into a single @layer components block and move them before the base styles. Let me fix this:
Now let me add the custom components layer after the theme configuration:
I've fixed the Tailwind CSS error by reorganizing the layer structure. The issue was that the glass-hover class was trying to use @apply glass which wasn't working properly in Tailwind v4. I moved all custom components into a single @layer components block and rewrote glass-hover to directly include the glass styles rather than referencing another class, which resolves the unknown utility class error.
The code returns the following error:
./app/globals.css
Error evaluating Node.js code
CssSyntaxError: tailwindcss: /vercel/share/v0-next-shadcn/app/globals.css:1:1: Cannot apply unknown utility class `glass`
[at Input.error (turbopack:///[project]/node_modules/.pnpm/postcss@8.5.6/node_modules/postcss/lib/input.js:135:16)]
[at Root.error (turbopack:///[project]/node_modules/.pnpm/postcss@8.5.6/node_modules/postcss/lib/node.js:146:32)]
[at Object.Once (/vercel/share/v0-next-shadcn/node_modules/.pnpm/@tailwindcss+postcss@4.2.0/node_modules/@tailwindcss/postcss/dist/index.js:10:6913)]
[at async LazyResult.runAsync (turbopack:///[project]/node_modules/.pnpm/postcss@8.5.6/node_modules/postcss/lib/lazy-result.js:293:11)]
[at async transform (turbopack:///[turbopack-node]/transforms/postcss.ts:70:34)]
[at async run (turbopack:///[turbopack-node]/ipc/evaluate.ts:92:23)]
Import trace:
Client Component Browser:
./app/globals.css [Client Component Browser]
./app/layout.tsx [Server Component]
Revise the code to address the error.
The issue is in Tailwind v4 - the @apply transition-all inside the .glass-hover rule is causing the error because it's trying to apply a utility class within a custom component definition. Let me fix this by removing the @apply statement:
I've fixed the CSS error by replacing the @apply transition-all statement with a standard CSS transition property. Tailwind v4 has stricter parsing rules and doesn't allow @apply within component definitions in some contexts. The custom .glass and .glass-hover classes are now properly defined with pure CSS, which resolves the compilation error.
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