inlineMessage variables missing in mytheme

Hello, I get this error by using mytheme, but I cannot realize where the root-cause is, because the `$inlineMessagePadding` variable is defined in `mytheme/variables/_message.scss`:

<img width="579" height="244" alt="Image" src="https://github.com/user-attachments/assets/3cde3b12-eeab-4c6d-9167-1c9f38aaa97a" />