https://developer.joomla.org/nightly-builds.html
https://joomla.stackexchange.com/questions/23273/get-framework-and-template-params-in-joomla-4
https://docs.joomla.org/Discover_your_template_css-styles_and_learn_how_to_change_them
https://docs.joomla.org/J4.x:SCSS_and_Sass/de
https://docs.joomla.org/Multiple_layouts_with_one_template
https://docs.joomla.org/Portal:Administrators
https://docs.joomla.org/Portal:Developers
https://docs.joomla.org/Understanding_Output_Overrides
https://docs.joomla.org/Jdoc_statements/de
https://docs.joomla.org/Portal:Developers
https://docs.joomla.org/Creating_clickable_background_images_using_CSS
https://docs.joomla.org/Layout_Overrides_in_Joomla/de
https://docs.joomla.org/How_to_cloak_email_addresses
https://docs.joomla.org/Changing_the_site_favicon/de
https://docs.joomla.org/Giving_the_Front_Page_a_different_style_from_other_pages