Mastering German Grammar A1 eBook Cover

"Design a portrait-oriented ebook cover for 'Mastering German Grammar A1.1' with a transparent background. The title should be displayed prominently in bold, clean typography, using the colors red, black, and yellow to represent the German flag. Include the subtitle 'A Comprehensive Guide for Beginners' in smaller, elegant text below the title. Add an illustration of an open book with grammar symbols, such as brackets and arrows, at the bottom. The overall design should be professional, minimalistic, and visually appealing for an educational audience."