States
A radio button card allows two statuses: Rest and isSelected. In addition to these statuses, the radio button card also has states for hover, focus, disabled, and error.
One of the radio buttons in a set is always in isSelected state. It’s possible to select only one radio button card at a time. The previous choice is automatically deselected once the user chooses a new item.
Typography
Titles, labels, and descriptions should be sentence cases. Only the first word in a phrase and any proper or exceptional nouns are capitalized.
Interactions
The selection is realized by clicking the whole radio button card; this makes it easier for the user to make the selection.
If Helper is visible, Soul uses a 24px square safe zone around it to provide users with the option to interact with it.