CSS Custom Properties

View the instructions in the warning and info callouts below to finish their styles.

I am a regular callout

Each callout has 2 buttons, a default one and an outline button.

I am a warning callout

The warning callout styles are mostly complete other than the missing outline button styles. Can you add this variation?

This info callout needs a new theme.

Can you use CSS Custom Properties to make sure the info callout and its buttons appear different from the regular and warning callouts?