> For the complete documentation index, see [llms.txt](https://nextsky.gitbook.io/purity-theme/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://nextsky.gitbook.io/purity-theme/theme-settings/custom-css.md).

# Custom CSS

**Custom CSS** allows you to apply your own stylesheet rules to override or extend the theme’s default design. This feature is ideal for advanced users who want precise control over the visual appearance of their store without modifying the theme’s core files.

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