type Font = 'serif' | 'sans-serif' | 'monospace';
type Theme = 'light' | 'sepia' | 'night';
type Size = 'small' | 'medium' | 'large' | 'full';
interface UIState {
    font: Font;
    fontSize: number;
    theme: Theme;
    size: Size;
    timerRunning: boolean;
    timerSeconds: number;
    hemingwayMode: boolean;
}
interface SilentSheetState extends UIState {
    content: string;
}
interface SilentSheetActions {
    setContent: (content: string) => void;
    setFont: (font: Font) => void;
    setFontSize: (size: number) => void;
    setTheme: (theme: Theme) => void;
    setSize: (size: Size) => void;
    saveContent: () => void;
    clearContent: () => void;
    toggleTimer: () => void;
    resetTimer: () => void;
    toggleHemingwayMode: () => void;
}
interface SilentSheetAPI {
    getState: () => SilentSheetState;
    getActions: () => SilentSheetActions;
    subscribeToUI: (callback: () => void) => () => void;
}

declare class SilentSheet implements SilentSheetAPI {
    private state;
    private subscribers;
    private timerInterval;
    constructor(initialState?: Partial<SilentSheetState>);
    private loadState;
    private saveState;
    private startTimer;
    private stopTimer;
    getState(): SilentSheetState;
    getActions(): SilentSheetActions;
    subscribeToUI(callback: () => void): () => void;
    private notifySubscribers;
}

export { type Font, SilentSheet, type SilentSheetAPI, type SilentSheetActions, type SilentSheetState, type Size, type Theme, type UIState };