docs: clarify where to add custom CSS files

[atharv96k]

Pre-flight checklist

• I have read the Contributing Guidelines on pull requests.
• If this is a code change: I have written unit tests and/or added dogfooding pages to fully verify the new behavior.
• If this is a new API or substantial change: the PR has an accompanying issue (closes #0000) and the maintainers have approved on my working plan.

Motivation

This change addresses #12031.

Beginner users often struggle to find where to place custom CSS files when customizing a Docusaurus site. Added a project folder structure example under the Global Styles section to make this clearer.

Test Plan

This is a documentation-only change. No code was modified.

Verified that the added folder structure renders correctly in the MDX file.

Test links

Deploy preview: https://deploy-preview-12032--docusaurus-2.netlify.app/docs/styling-layout

Related issues/PRs

Closes #12031

Screenshot

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[meta-cla]

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[Dharya-dev]

Thanks for adding this clarification! It's definitely helpful for beginners to visualize where the file should go.

However, since this is an .mdx file, the plain text file tree you added needs to be wrapped inside a code block. Otherwise, MDX will render it as a single line of text and ignore the spaces and newlines.

You should wrap it like this:

\\ ext
my-website/
├── src/
│ └── css/
│ └── custom.css ← add your custom styles here
├── docusaurus.config.js
└── package.json
\\

Could you wrap the structure block in those backticks? Thanks!

[atharv96k]

@Dharya-dev Done! Wrapped the file tree in a code block. Thanks for the review! 🙂

[slorber]

Thanks 👍