/**
 * @license
 * Copyright 2026 Kai-Orion & Sandlada
 * SPDX-License-Identifier: MIT
 */
import { LitElement, type PropertyValues, type TemplateResult } from 'lit';
import { AppBarAlignment, AppBarVariant, type IAppBar } from '../appbar.interface';
declare const BaseAppBar_base: Omit<typeof LitElement, "prototype"> & (new () => LitElement & import("../../../utils/behaviors/element-internals").WithElementInternals & import("../../elevation/elevation-options.mixin").IMixinElevationOptions);
/**
 * Base app bar class providing structure, slots, and scroll tracking.
 *
 * Implements Material Design 3 and MD3 Expressive app bar specifications:
 * - Small
 * - Center-aligned
 * - Medium flexible
 * - Large flexible
 * - Search app bar
 */
export declare abstract class BaseAppBar extends BaseAppBar_base implements IAppBar {
    variant: AppBarVariant;
    alignment: AppBarAlignment;
    headline: string;
    subtitle: string;
    scrolled: boolean;
    scrollTarget: HTMLElement | Window | string | null;
    protected hasLeading: boolean;
    protected hasTrailing: boolean;
    protected hasHeadline: boolean;
    protected hasSubtitle: boolean;
    protected hasSearch: boolean;
    private boundScrollHandler;
    private currentScrollElement;
    connectedCallback(): void;
    disconnectedCallback(): void;
    protected updated(changedProperties: PropertyValues<this>): void;
    protected get normalizedVariant(): string;
    protected get isCentered(): boolean;
    protected getRenderClasses(): Record<string, boolean>;
    protected handleLeadingSlotChange(e: Event): void;
    protected handleTrailingSlotChange(e: Event): void;
    protected handleHeadlineSlotChange(e: Event): void;
    protected handleSubtitleSlotChange(e: Event): void;
    protected handleSearchSlotChange(e: Event): void;
    protected handleDefaultSlotChange(e: Event): void;
    private setupScrollTarget;
    private cleanupScrollTarget;
    protected renderLeading(): TemplateResult;
    protected renderTrailing(): TemplateResult;
    protected renderTitleContent(): TemplateResult;
    protected renderSmallLayout(): TemplateResult;
    protected renderFlexibleLayout(): TemplateResult;
    protected renderSearchLayout(): TemplateResult;
    protected render(): TemplateResult;
}
export {};
//# sourceMappingURL=base-appbar.d.ts.map