How to change the theme of Chrnoforms6 ?

Hello,
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I would like to change the theme of the forms.
Using the github forms style from ui or changing the default one with a more darker case
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How can I do ?
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Thanks
Thomas

The easiest way is to add a css block to your form to override the styles, now if you want every form on your site to look the same way you should use joomla's custom.css, you can use your browser's inspector to check the styles and even try different setups, then you work on your custom.css
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Also check your template documentation cause the css might get in the way.