Not sure exactly what you mean, setting label { font-size: 200px; } works for me (causing a disaster), even on 1.2.

Please clarify what you mean, as ~cloudninja pointed out this is currently possible, additionally wofi does not control the CSS beyond some macros, the CSS is controlled entirely by GTK and provides a very rich set of features.

Ah my bad! I should've tried with another known-working style change, as it simply turns out style=style.css doesn't support relative paths the way I would expect (relative to the config file). After reading the man page more carefully, I replaced it with stylesheet=style.css, and everything works!

Thanks for your help :)

Glad you figured it out!