The housing stays fixed. The square thumb is the actuator.

• Off: paper track and ink thumb.
• On: sky-blue track and canary-yellow thumb; position remains the primary checked signal.
• Pressed: the track switches to coral and loses its hard shadow. Release restores the full structure.
• Focus: hard offset outline.
• Disabled: structure remains visible at reduced emphasis.

Each runtime-neutral demo example keeps its visible caption inside the Switch root. Inherited Base nameFromContent projection therefore derives the accessible name from the same visible text in Web Components, React, and Vue; the examples need neither a host-specific aria-label nor a native <label for> relationship that cannot target a custom-element host. The caption is part of the Switch control surface, so clicking it follows the Switch activation path while the disabled example remains inert.