import type { EventEmitter } from '../../stencil-public-runtime';
import type { RadioChangeDetail, RadioSize } from './mud-radio.types';
/**
 * Radio — single-select form input atom.
 *
 * Pattern B (atom-interactive, form-associated): renders its own
 * `<input type="radio">` inside shadow DOM and paints the visual circle
 * with CSS. Form participation works via `formAssociated` +
 * `ElementInternals.setFormValue`. The component is the standalone radio
 * primitive; `mud-radio-group` groups radios into one Tab stop with
 * arrow-key selection and gives them one `name`.
 *
 * @element mud-radio
 *
 * @slot label - Rich label content, replaces the `label` prop when present.
 * @slot supporting-text - Rich supporting text, replaces the `supportingText` prop when present.
 */
export declare class MudRadio {
    /**
     * Visual size rung.
     * @default 'md'
     */
    size: RadioSize;
    /**
     * Whether the radio is currently selected.
     * @default false
     */
    checked: boolean;
    /**
     * Disables interactivity. The internal control receives `aria-disabled` and
     * the native `disabled` attribute.
     * @default false
     */
    disabled: boolean;
    /**
     * Maps to Figma's "Error" state — border and selected dot turn red.
     * Sets `aria-invalid` on the internal control.
     * @default false
     */
    invalid: boolean;
    /**
     * Marks the field as mandatory. Sets `aria-required` on the internal control.
     * @default false
     */
    required: boolean;
    /**
     * Renders the control read-only. It remains focusable but cannot be toggled.
     * @default false
     */
    readonly: boolean;
    /** Form-control `name`. Used during form submission and for grouping radios. */
    name?: string;
    /** Value submitted with the form when this radio is checked. */
    value?: string;
    /**
     * Visible label text, which also names the input. The `label` slot replaces it
     * for rich content. For an accessible name with no visible text, set the native
     * `aria-label` attribute instead.
     */
    label?: string;
    /**
     * Visible supporting text below the label, wired to the input through
     * `aria-describedby`. The `supporting-text` slot replaces it for rich content.
     */
    supportingText?: string;
    /**
     * Plain-text error message shown under the label and supporting text when
     * `invalid` is set (Figma radio-label Error, 585:35232). Linked to the
     * internal control through `aria-describedby`.
     */
    errorText?: string;
    /** ID of the element labelling the radio. Used when label content lives outside the component. */
    ariaLabelledby?: string;
    private hasLabelSlot;
    private hasSupportingTextSlot;
    private isFocused;
    private fieldsetDisabled;
    private resolvedAriaLabel?;
    private resolvedAriaLabelledby?;
    host: HTMLMudRadioElement;
    internals: ElementInternals;
    /** Fires whenever the checked state changes. `detail.checked` is the new state. */
    mudChange: EventEmitter<RadioChangeDetail>;
    /** Fires when the internal control gains focus. The native `FocusEvent` is forwarded as-is. */
    mudFocus: EventEmitter<FocusEvent>;
    /** Fires when the internal control loses focus. The native `FocusEvent` is forwarded as-is. */
    mudBlur: EventEmitter<FocusEvent>;
    private readonly instanceId;
    private readonly inputId;
    private readonly labelId;
    private readonly supportingId;
    private readonly errorId;
    private initialChecked;
    private stopAriaLabel?;
    validateSize(next: RadioSize): void;
    handleCheckedChange(next: boolean): void;
    handleValueChange(): void;
    syncAriaLabelledby(next?: string): void;
    connectedCallback(): void;
    disconnectedCallback(): void;
    componentWillLoad(): void;
    /** Mirrors `disabled` from an ancestor `<fieldset disabled>` without clobbering the consumer-set prop. */
    formDisabledCallback(disabled: boolean): void;
    formResetCallback(): void;
    formStateRestoreCallback(state: string | File | FormData | null): void;
    private syncFormValue;
    private uncheckSiblings;
    private onLabelSlotChange;
    private onSupportingTextSlotChange;
    private slotHasContent;
    private handleChange;
    private handleClick;
    private handleFocus;
    private handleBlur;
    private isInert;
    private hasErrorMessage;
    render(): any;
}