In every project, I find a strange internal style tag with bunch of code I didn't write...
I called only fontawesome and bootstrap via CDN...Is this style related with any of this? I am just curious...
This looks like it's not part of your website, but is rather injected through a browser plugin or a virus. Things to try:
If so, disable all browser extensions and start enabling them again one-by-one until the styles show up again. That's the extension causing this.