TYPO3 Core

Easy configuration of the styled html output should be doable just by changing/overwriting css in the project file.

But tx_form_view_form > setCss includes the extension's standard css-file to additionalHeaderData['tx_form_css'].
Page.includeCSS is loaded in the final html output before that. So an easy css styling can not be done just by overwriting CSS-code in page.includeCSS.

1. Add TS configuration in "Default TS (form)" static standard typoscript to change the css-file path. OR
2. implement a switch to not load the extension's css-file.