where do I change the css for the default form block?
In your theme you can write new styles to override any core styling.
What you can do is copy the view.php
and the view.css
from the
concrete/blocks/form
folder and place it into a folder like this
application/blocks/form/templates/customtemplate
you can replace customtemplate with what ever you need make sure you use underscores for spaces _ and all lowercase
then edit the view.css
it goes into it more here