## Block indentation using CSS classes

This is a normal paragraph with no indentation applied.

### This heading has the `.custom-block-indent-a` class

This paragraph shares the same class and that puts it at the same level.

#### But this one has the `.custom-block-indent-b` class

This paragraph shares the same indentation class.

This paragraph has the `.custom-block-indent-c` class. This is the maximum indentation level allowed in the configuration.