/**
 * Line chart renderer (single or multi-series).
 *
 * Layout (chart-recipes.md → Line):
 *   - X axis: categorical labels evenly distributed across plot width
 *   - Y axis: Nice Numbers from data range (does NOT force include zero —
 *     line charts about deltas are common)
 *   - Path: linear (M/L) or smooth (cubic Bezier with Catmull-Rom-ish
 *     control points at ⅓ / ⅔ between adjacent points)
 *   - Marks: <circle r=3> at each data point (toggleable via showMarks)
 */
import type { LineContent } from "./schemas.js";
export interface LineRenderInput {
    title: string;
    subtitle?: string;
    content: LineContent;
}
export declare function renderLineBody({ content }: LineRenderInput): {
    chartHtml: string;
    chartCss: string;
    legendHtml?: string;
};
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