The Popup kit (VX) widget can be used to apply global styles to the voxel popup components.

This widget must be added in the Popup Styles template in WP admin ➝ Templates ➝ Style kits

Once you add the widget, you can control the styling of the various components in the widget options area. After saving changes, the styles generated based on your settings is applied to all popups across the site.

Note: This template is not utilized anywhere in front-end, it’s purpose is purely to generate styles that are applied to the popups automatically.