I use find all the time and have added a few handy functions to my fish shell so I can:

f '.css' # regular recursive find for css files

f '.css' '#content' # find and grep

fgu '*.css' '#content' # give a listing of unique css files containing '#content'

If anyone wants to take a peek, the f, fg, and fgu functions are on github (https://github.com/bartvandendriessche/fish-nuggets/tree/mas...).