import type { Dimensions } from "../../../../core/domain/types.js";
import type { GradientState } from "../../domain/models/OceanModels.js";
import type { IGradientRenderer } from "../contracts/IGradientRenderer.js";
export declare class GradientRenderer implements IGradientRenderer {
    initializeGradientState(dimensions: Dimensions): GradientState;
    private createFogLayers;
    private createDistantGlows;
    updateGradientState(state: GradientState, frameMultiplier: number): GradientState;
    drawOceanGradient(ctx: CanvasRenderingContext2D, dimensions: Dimensions, state?: GradientState | null): void;
    /**
     * Draw the base ocean gradient with color breathing
     */
    private drawBaseGradient;
    /**
     * Draw horizontal depth fog layers
     */
    private drawDepthFog;
    /**
     * Draw distant bioluminescent glow spots
     */
    private drawDistantBioluminescence;
    /**
     * Draw subtle edge vignette
     */
    private drawVignette;
    private hsl;
    private hexToRgb;
    private randomInRange;
    private randomIntInRange;
}
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