> For the complete documentation index, see [llms.txt](https://docs.kasko.io/product-builder-manual/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.kasko.io/product-builder-manual/fundamentals/create-your-first-integration/css.md).

# CSS

On the Integration, you will be able to add some custom CSS which will overwrite the CSS in your webapp. This configuration is optional to allow you provide a more customised look and feel of your product.

The configuration is a free JSON field for you to put the CSS in. There are simple CSS validation in place to prevent unnecessary errors.

<figure><img src="/files/IEWK28cXzJivlEenWEwM" alt=""><figcaption><p>CSS Configuration Screen Example</p></figcaption></figure>