/** * Declarative z-index tokens. * * Intra-input stacking: * * - `z-input-field` → native field / interactive foreground (e.g. an * `` or trigger button) sitting above the * input's own background surface, icons, and * adornments so keyboard/mouse focus is never * hijacked by a decorative sibling. * - `z-input-popup` → inline (non-teleported) overlays anchored to the * input — dropdown menus, option lists, popovers — * that must sit above surrounding form content but * within the current stacking context. * - `z-input-overlay` → teleported overlays (rendered under `
` via * `