Alternatives to Bootstrap, frameworks or UI Kits

Awesome. Thank you. Couple of issues I’ve noticed so far:

assets/styles/components/_wp-classes.scss
assets/styles/components/_comments.scss

Contain @extend calles which are looking for undefined variables.

.form-group
.form-control
.btn
etc...

For now I just added the !optional “tag” (?) following them.

Also looking into what will be required for submenu items to work.