import { type PlayerStrings } from '../core/strings.js';
/** A single chat message displayed in the panel */
export interface ChatMessage {
    userId: string;
    displayName: string;
    text: string;
    timestamp: number;
    isLocal: boolean;
}
/**
 * Side panel overlay for collaborative chat.
 * Slides in from the right with frosted glass styling.
 */
export declare class ChatPanel {
    private panel;
    private messagesEl;
    private inputEl;
    private emptyEl;
    private styleEl;
    private isOpen;
    private messages;
    private colorMap;
    private colorIndex;
    private onSend;
    private shadowRoot;
    private strings;
    constructor(shadowRoot: ShadowRoot, onSend: (text: string) => void, strings?: PlayerStrings);
    /** Add a chat message to the panel */
    addMessage(msg: ChatMessage): void;
    /** Toggle panel open/closed */
    toggle(): void;
    /** Open the panel */
    open(): void;
    /** Close the panel */
    close(): void;
    /** Whether the panel is currently visible */
    isVisible(): boolean;
    /** Get message count */
    getMessageCount(): number;
    /** Clean up */
    dispose(): void;
    private handleSend;
    private renderMessage;
    private scrollToBottom;
    private getColorForUser;
    private formatTime;
}
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