From flat to rounded. Use the style that matches your application or website.By default, the primary button style is used unless otherwise impossible.For example: if the service button or a form button has a similar color, it is assumed to be placed within a block with other buttons in a uniform style (with an outline) or has a colored background underneath.
Use the font of your service’s buttons or the system fonts of the mobile platform. It is important to maintain proportionality between the font size and the button height.
After authentication via Freedom ID, a badge should appear next to or instead of the user's avatar, indicating that the login was completed with Freedom ID. In some cases, a label such as «Logged in with Freedom ID» can be used.