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Tailwind on DNN 10 is overwrite by _reset.scss (default.css)

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Erwin

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Posts: 23

6/26/2025 11:16 AM

Was trying to create a simple DNN 10 Theme using Tailwind CLI.
Nothing fancy on input.css, just

@import "tailwindcss";

Generate output by run cmd:

npx @tailwindcss/cli -i ./css/input.css -o ./css/output.css --watch

And play with UI.
But somehow all padding, margin, border, font got overwrite by _reset.scss (default.css)
Causing the UI that's suppose to be working, got mess up.

The DnnCssInclude priority was set to 110 but still got ovewrite by _reset.scss

I can remove the default.css with 40Fingers Stylehelper, but this will causing Edit Content & Module Settings UI got mess up

Wonder if there's a better solution.

Timo Breumelhof.

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Posts: 1322

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6/26/2025 11:41 AM

I'm no sure this has anything to do with the order as that should already be correct..
(default.css first skin.css after that)

I don't use Tailwind, but can't it deal with these resets? That seems weird to me..?

Erwin

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Posts: 23

6/26/2025 2:19 PM

Still cannot make it work, seems conflict with tailwind.
I'll exclude default.css and use another skin for Edit Layout.

Timo Breumelhof.

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6/27/2025 2:44 AM

Hmm, I just tested injecting the reset.css into an online Tailwind editor and it did not seem to influence the layout.
Would you mind giving me a copy of the theme so I can test locally?
Because if that reset is influencing Themes, that's not good.

Erwin

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Posts: 23

6/28/2025 3:42 PM

Sure,
You can grab it on https://github.com/erw13n/TailwindTheme

Erwin

New Around Here

Posts: 23

6/28/2025 4:39 PM

I think the problem is not DNN but Tailwind 4.
I try downgrade it to Tailwind 3.5 and seems working fine.

Timo Breumelhof.

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6/29/2025 4:00 AM

Posted By Erwin on 6/28/2025 10:39 PM
I think the problem is not DNN but Tailwind 4.
I try downgrade it to Tailwind 3.5 and seems working fine.

Ah ok.
Thank you for letting us know :-)

Will Strohl

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Posts: 1607

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8/11/2025 12:44 PM

Posted By Erwin on 6/28/2025 1:39 PM
I think the problem is not DNN but Tailwind 4.
I try downgrade it to Tailwind 3.5 and seems working fine.

Yeah... this is why I was never a fan of this direction of DNN 10. These new and untested dependencies are keeping us from really being able to support DNN 10 right now.

Will Strohl
Founder & CEO, Upendo Ventures

🛠️ Have a DNN Project? | 🛡️ Need SLA-based DNN Support?

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Erwin

New Around Here

Posts: 23

9/5/2025 4:57 PM

Tailwind 4 is introduction of CSS Cascade Layers.
All the styles that generated was now inside @layer.
Anything defined outside of @layer is stronger than @layer https://developer.mozilla...S/@layer#description

Since DNN default.css is not inside @layer, it's stronger than @layer.
A quick solution would be modify default.css, and wrap it in @layer, this will make Tailwind.css stronger than default.css

Jeremy Farrance

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9/6/2025 9:23 AM

Erwin, very nice work proposing the fix!!

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