function deepClone(obj) {
    if (obj === null || typeof obj !== 'object') {
        return obj;
    }
    
    if (obj instanceof Date) {
        return new Date(obj);
    }
    
    if (obj instanceof Array) {
        return obj.map(item => deepClone(item));
    }
    
    if (obj instanceof Object) {
        const clonedObj = {};
        for (const key in obj) {
            if (obj.hasOwnProperty(key)) {
                clonedObj[key] = deepClone(obj[key]);
            }
        }
        return clonedObj;
    }
    
    return obj;
}