### Custom CSS

```jsx
// add some post styleguide customizations. These cannot be overridden by the style guid.
import { setPostStyleGuideTheme } from "@insite/client-framework/ThemeConfiguration";
setPostStyleGuideTheme({
    listItem: {
        defaultProps: {
            mergeCss: true,
            css: css`
                color: blue;
                border: 2px dashed lime;
            `,
        },
    },
});
```
