I’m trying to customize the new chat window (full screen mode) on desktop. I have the css I’d like to use, but I can’t figure out where to put it in my theme to have it take effect. I’ve tried … my_theme/desktop/chat.scss my_theme/desktop/chat_desktop.scss my_theme/common/chat.scss my_theme/commo…

You can put your CSS in theme/desktop/desktop.scss — to impact chat it doesn’t have to be in a chat-specific file, you just have to target the relevant classes.

I must be missing something. What is incorrect about it? This is my folder structure. [Screenshot 2023-01-06 at 9.22.05 AM]

That’s different to what you shared in the OP: [image] If you want to name the chat mods as something different, you must reference them in the main file.

Sorry for the confusion. In the OP I was trying to communicate what files I tried making, and the locations in which I placed them. I don’t want to name the chat mode differently, I’m just trying to figure out which scss file I should place the css in to effect only the desktop, full screen mode …

You can use @import "chat" or equivalent to import them into your main file.

Chat look customization

Development

merefield (Robert) January 6, 2023, 5:19pm 2

Your folder/file name structure is incorrect.

Take a read through: Developing Discourse Themes & Theme Components

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Full-screen chat as default for collaboration setup Feature chat	10	382	June 18, 2025
Default Chat Channel Theme component	5	317	February 14, 2026
Discourse Chat - force fullscreen? Support chat	2	114	August 21, 2024
Enabling chat changes the padding of main-outlet on mobile Support chat	9	434	November 9, 2022
Change chat font Support chat	2	404	January 31, 2023

Chat look customization

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