export type EmailMessage = {
    to: string;
    subject: string;
    html: string;
};
export type EmailProvider = {
    send(message: EmailMessage): Promise<void>;
};
export type EmailTheme = {
    brandName: string;
    tagline?: string;
    footerNote?: string;
    colors: {
        ink: string;
        accent: string;
        gold: string;
        paper: string;
        card: string;
        muted: string;
        hairline: string;
    };
};
export declare const DEFAULT_EMAIL_THEME: EmailTheme;
/** A short, human order reference derived from a session id. */
export declare const orderNumber: (sessionId: string) => string;
/** Format a minor-unit amount for display (null → em dash). */
export declare const formatMoneyCents: (cents: number | null, currency?: string | null) => string;
/** A carrier tracking URL, or '' for an unknown carrier. */
export declare const carrierTrackingUrl: (carrier: string, trackingNumber: string) => string;
/** A branded call-to-action button (inline-styled for email clients). */
export declare const emailButton: (theme: EmailTheme, href: string, label: string) => string;
export type EmailLineItem = {
    label: string;
    amountCents: number;
};
export type LineItemsOptions = {
    currency?: string | null;
    totalCents?: number | null;
    totalLabel?: string;
};
/** A line-items table with an optional total row. */
export declare const emailLineItems: (theme: EmailTheme, items: EmailLineItem[], options?: LineItemsOptions) => string;
export type RenderEmailArgs = {
    preheader: string;
    heading: string;
    intro: string;
    /** Pre-built inner HTML (line tables, buttons, paragraphs). */
    inner?: string;
};
/** Wrap content in the branded, responsive email shell. */
export declare const renderEmail: (theme: EmailTheme, { preheader, heading, intro, inner }: RenderEmailArgs) => string;