Theming wallet surfaces

Start with UI customization. Seams renders UI in two places: React components on the application origin and protected surfaces on the wallet origin. Use the same color roles and shape settings in both places.

Apply a theme

• Use Theme and its tokens for app-owned React components.
• Set appearance during SDK configuration, or call seams.config.setAppearance, for the auth menu, confirmer, and export viewer inside the wallet iframe.
• Start from LIGHT_TOKENS, DARK_TOKENS, and one SHAPE_PRESETS branch.
• Override semantic roles as a complete light/dark pair.
• Check text contrast, visible focus, status meaning, and forced-color behavior after every palette change.

See the detailed token table and code in the theming reference.