How to integrate Squarespace site styles in a code block?

Is there a way to incorporate the site's styles into code blocks or markdown blocks so that they are essentially linked to any future changes in the site's styles? For instance, if I create a text block I can see classes are assigned to various tags, such as sqsrte-large or sqsrte-text-color--white. Can I freely use these classes in my code blocks without fear of them breaking in the future?

Depends on your code. Can you post the code you will use? We can tweak it easier