CSS-Files

# Support

## Description

Typo3 Version 12
I somehow have a problem understanding css files in bootstrap, I adjusted the css files in typo3conf/ext/bootstrap_package/Resources/Public/Css/ (bootstrap5-rte.css; bootstrap5-theme.css) then "minimized" , then I deleted the cache, logged out and deleted typo3temp to be on the safe side.

I then log in to BE, go into editor mode and check and call up the page via display and then
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lots of css files have been created in the typo3temp directory, but my adjustments are not included in them, where does the content for the css files in typo3temp come from.

Start with the referenced source files in typo3conf/ext/bootstrap_package/Resources/Public/Css/ and compare them with the generated files under typo3temp/assets/bootstrappackage/css/. Trace how the listed theme, fastmenu, and develop stylesheets are produced and verify which source changes are reflected after cache deletion. Done means the origin of the generated CSS is documented and the expected adjustments appear in the loaded assets.

Written by the indexing model from the issue text.