Simple Icons 16.34.0 (https://simpleicons.org/, https://github.com/simple-icons/simple-icons)
Used for: the Claude, Perplexity, Mistral, Gemini and one-color Google "G" icons, in includes/Render/Icons.php.

The Simple Icons project releases its icons under CC0 1.0 Universal (public domain dedication):
https://creativecommons.org/publicdomain/zero/1.0/

The icons are brand marks: they belong to their owners and are used only to identify each service.
