/**
 * Class names that re-establish the Anvil2 styling scope on a container.
 *
 * Native `popover` / top-layer elements (toasts, popovers, tooltips, surfaces)
 * are promoted to the top layer and live high in the DOM, escaping any ancestor
 * `AnvilProvider`'s `.anvil2` scope. Without the scope, descendants resolve none
 * of the `--a2-*` design tokens (defined on `.anvil2.theme-core`) and miss the
 * scoped component rules, so they render unstyled.
 *
 * Spread/append these class names onto such containers so they self-scope and
 * render correctly in any host context (including outside an `AnvilProvider`,
 * e.g. when an Anvil2 component is used from a legacy host).
 */
export declare const portalScopeClassNames: string;
