does not apply "bold" and "underline"

[kemalgencay]

repo: https://github.com/kemalgencay/fake-start
What am I doing wrong?
TIA

[gebt2000]

Thanks for sharing the repro repo. This usually happens when Tailwind isn't scanning the files where those classes are used.

Quick checks that usually fix font-bold / underline not applying:

1. In tailwind.config.*, make sure content includes every source path you render from (especially src, app, and component folders).
2. Ensure your global CSS includes:
   • @tailwind base;
   • @tailwind components;
   • @tailwind utilities;
3. Restart dev server after config edits (Tailwind content globs are not always hot-reloaded reliably).
4. Confirm there isn't a later CSS rule overriding weight/decoration (DevTools > Computed helps here).

If you want, I can point to the exact line once you paste your tailwind.config content section.

If this resolved it, feel free to mark accepted so future readers can find it quickly.

[wongjn]

These instructions are for Tailwind v3 but it looks like the OP is using v4.

[kemalgencay]

I am using Tailwind 4.2.2, there is no tailwind.config file
It works fine in Tailwind Play

[Maybach91]

You don’t include your CSS File correctly in your index.html

-<link href="./output.css" rel="text/stylesheet">
+<link href="src/output.css" rel="text/stylesheet">

But your output.css file is relative to the root index.html in ./src/output.css not in ./output.css. You can see this in the Browser Developer Tools Network Tab, that no CSS is loaded. You can also see it in your IDE, when you try to CMD+Click on the ./output.css it will not resolve, since the file does not exist. @kemalgencay

[kemalgencay]

Thanks for your attention, before you wrote I noticed that the file path was wrong and I changed it to src/output.css but alas it still did not work, so I moved output.css to root, "voila!" it works fine now. If it were not you, I would never have tryed this!
Here it is now: https://fake-start.kemalgencay.deno.net/
Thank you so much
Regards

[sydneyvaughn75-ops]

Ah, that makes sense! So the root issue was just the relative path—moving output.css to the root fixed it. Thanks for confirming, this saved me a ton of guessing 😅

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On Fri, Mar 27, 2026, 3:26 AM Kemal Esat Gençay ***@***.***> wrote: Thanks for your attention, before you wrote I noticed that the file path was wrong and I changed it to src/output.css but alas it still did not work, so I moved output.css to root, "voila!" it works fine now. If it were not you, I would never have tryed this! Here it is now: https://fake-start.kemalgencay.deno.net/ Thank you so much Regards — Reply to this email directly, view it on GitHub <#19850?email_source=notifications&email_token=B7HZNK72HOCVQFCQ64J7XC34SY3KHA5CNFSNUABIM5UWIORPF5TWS5BNNB2WEL2ENFZWG5LTONUW63SDN5WW2ZLOOQXTCNRTGQYDKMBWUZZGKYLTN5XKU43VMJZWG4TJMJSWJJLFOZSW45FMMZXW65DFOJPWG3DJMNVQ#discussioncomment-16340506>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/B7HZNK5CCRGJOP4JRAJ72D34SY3KHAVCNFSM6AAAAACW6XVKVSVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTMMZUGA2TANQ> . You are receiving this because you are subscribed to this thread.Message ID: <tailwindlabs/tailwindcss/repo-discussions/19850/comments/16340506@ github.com>