function config = load_config_mat(file_path)
%LOAD_CONFIG_MAT Load config struct from a MAT file.

arguments
    file_path (1,:) char
end

if ~exist(file_path, 'file')
    error('load_config_mat:FileNotFound', 'Config file not found: %s', file_path);
end

data = load(file_path, '-mat');
if ~isfield(data, 'config')
    error('load_config_mat:MissingConfigVariable', ...
        'MAT file does not contain variable ''config'': %s', file_path);
end

config = normalize_config(data.config);