Hello, please spare me with this but where can I set the path for the custom CSS? I have it on the default path, css/custom.css but it seems to not work. Maybe I need to set or activate it or also maybe my selectors are wrong.

.clock .time {
   font-size: 100px; }

also

.clock .bright {
   font-size: 100px; }

Neither of those work.

Please can someone help me. Just wanted to increase the font-size of the digital time of the default clock module.
Thank you.