I will begin by working closely with you to understand your specific requirements and preferences for the user interface design. Using my expertise in HTML, CSS, and JavaScript, I will create a single-page HTML file with a CSS file that fulfills all of the requirements you have outlined, including the main menu, submenus, popup windows, cursor animation, scaling, and overall aesthetics. I will ensure that the user interface is fully functional and easy to navigate, with smooth animations and a polished appearance.
As an experienced web developer, I have worked on similar projects in the past and have a deep understanding of HTML, CSS, and JavaScript. I am proficient in various design software and tools, and have a strong eye for detail and aesthetics. Additionally, I am skilled in creating responsive designs that look great on a variety of devices, and am dedicated to ensuring that the final product meets and exceeds your expectations.