Do component content entities have view modes?
No. Component content entities do not have view modes.
No. Component content entities do not have view modes.
Yes, you can use Drupal fields in certain parts of Site Studio.
It depends on the use case. For fields and their field formatters use a 'Field' element, for data without field formatters, use a token.
You can only add combinators to child selectors. Add a child selector and combinator will appear in the Style tree.
You don't. You apply a Descendant selector. These use a (Space).
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