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

# Custom CSS

Add custom CSS styles that apply across your entire store without editing theme files directly.

{% hint style="info" %}
**Theme Editor → Theme settings → Custom CSS**
{% endhint %}

<figure><img src="https://795663372-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F6DraMvJNYYlFJqlho1aV%2Fuploads%2FReXoL2J9nV3m3UREVZMw%2FGroup%2018%20(1).jpg?alt=media&amp;token=26b4173c-7cd0-41a9-b232-bc558b3fee66" alt=""><figcaption></figcaption></figure>

Paste your CSS directly into the built-in code field. Styles apply globally to all pages.

{% hint style="success" icon="sparkles" %}
**Tip:** Always add custom CSS here rather than editing `base.css` directly — styles in Theme settings → Custom CSS **survive theme updates**.
{% endhint %}

For guidance on writing CSS for Shopify themes, see [Shopify's documentation](https://help.shopify.com/en/manual/online-store/themes/theme-structure/extend/add-css).


---

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