There's not *actually* anything particularly weird there, it's just a result of the fact that CSS allows any non-ASCII character to form an ident token (along with ASCII alphanums, dashes, and underscores), which class selectors, property names, and keywords are all made from. So "ಠ_ಠ" is an ident, "--（╯°□°）╯" is an ident (if you're careful to use ideographic parentheses; it won't work with ASCII parens), and then ︵┻━┻ and ┬──┬ are idents.
Probably the odder part is that it uses a custom property, whose only constraint is that it has to be an ident that starts with two dashes. That's what lets the whole thing look so... odd in CSS.
(defun fibs (n &optional (a 1) (b 1)) (take n (unfold '+ a b)))