import { LitElement } from 'lit';
/**
 * Graphic item interface for the graphics list section
 */
export interface GraphicItem {
    heading: string;
    description: string;
    imageSrc?: string;
    imageAlt?: string;
}
/**
 * USA Landing Template
 *
 * Hero-focused landing page template following USWDS patterns.
 * Extends the base template structure with hero, tagline, graphics list, and CTA sections.
 *
 * **Template Structure (from USWDS):**
 * - Skip navigation + Banner + Header (inherited)
 * - Hero section with callout
 * - Tagline section
 * - Graphics list section (dark background)
 * - Call-to-action section
 * - Footer + Identifier (inherited)
 *
 * @element usa-landing-template
 *
 * @slot hero - Custom hero section content
 * @slot tagline - Custom tagline section
 * @slot graphics - Custom graphics list section
 * @slot cta - Custom call-to-action section
 * @slot header - Site header (inherited from base)
 * @slot footer - Site footer (inherited from base)
 *
 * @fires {CustomEvent} template-ready - Fired when template initializes
 *
 * @example Basic usage with properties
 * ```html
 * <usa-landing-template
 *   hero-heading="Welcome to Our Agency"
 *   hero-description="We serve the American public."
 *   hero-cta-text="Learn More"
 *   hero-cta-url="/about"
 *   tagline-heading="Our Approach"
 *   tagline-description="How we do our work."
 * ></usa-landing-template>
 * ```
 *
 * @example With custom slotted content
 * ```html
 * <usa-landing-template>
 *   <section slot="hero" class="usa-hero">
 *     <!-- Custom hero content -->
 *   </section>
 * </usa-landing-template>
 * ```
 *
 * @uswds-template https://designsystem.digital.gov/templates/landing-page/
 */
export declare class USALandingTemplate extends LitElement {
    protected createRenderRoot(): this;
    /**
     * Page language attribute
     */
    lang: string;
    /**
     * Whether to show the government banner
     */
    showBanner: boolean;
    /**
     * Whether to show the identifier at the bottom
     */
    showIdentifier: boolean;
    /**
     * Hero heading text (main headline)
     */
    heroHeading: string;
    /**
     * Hero heading accent (smaller text above main heading)
     */
    heroHeadingAccent: string;
    /**
     * Hero description text
     */
    heroDescription: string;
    /**
     * Hero call-to-action button text
     */
    heroCtaText: string;
    /**
     * Hero call-to-action button URL
     */
    heroCtaUrl: string;
    /**
     * Hero background image URL
     */
    heroImageUrl: string;
    /**
     * Tagline heading text
     */
    taglineHeading: string;
    /**
     * Tagline description text
     */
    taglineDescription: string;
    /**
     * CTA section heading text
     */
    ctaHeading: string;
    /**
     * CTA section description text
     */
    ctaDescription: string;
    /**
     * CTA button text
     */
    ctaButtonText: string;
    /**
     * CTA button URL
     */
    ctaButtonUrl: string;
    /**
     * Graphics list items (JSON array)
     */
    graphics: GraphicItem[];
    /**
     * Default image path for graphics
     */
    imagePath: string;
    connectedCallback(): void;
    firstUpdated(changedProperties: Map<string, any>): void;
    /**
     * Check if a slot has content
     */
    private hasSlotContent;
    /**
     * Render the hero section
     */
    private renderHero;
    /**
     * Render the tagline section
     */
    private renderTagline;
    /**
     * Render the graphics list section
     */
    private renderGraphics;
    /**
     * Render the CTA section
     */
    private renderCta;
    render(): import('lit-html').TemplateResult<1>;
    /**
     * Public API: Set graphics items
     */
    setGraphics(items: GraphicItem[]): void;
    /**
     * Public API: Add a graphic item
     */
    addGraphic(item: GraphicItem): void;
}
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