import { SxProps, Theme } from '@mui/material/styles';
/**
 * Style factories for the collapsible filter panel that sits above the
 * DataGrid. Every entry is a `(theme: Theme) => SxProps<Theme>` function —
 * including the purely static ones — so callers have a single consistent
 * invocation pattern (`filterPanelStyles.icon(theme)`) and it stays easy
 * to introduce theme-dependent tweaks later without touching the call sites.
 *
 * Review refactor R8 — normalized to "always a function".
 */
type FilterPanelStyleFn = (theme: Theme) => SxProps<Theme>;
interface FilterPanelStyles {
    container: FilterPanelStyleFn;
    icon: FilterPanelStyleFn;
    iconContainer: FilterPanelStyleFn;
    toggleButton: FilterPanelStyleFn;
    toggleButtonIcon: FilterPanelStyleFn;
}
export declare const filterPanelStyles: FilterPanelStyles;
export {};
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