Learn to create a responsive dropdown menu bar with multiple levels using HTML and CSS in this comprehensive tutorial. Develop a fully functional and visually appealing navigation system for websites. Follow step-by-step instructions to set up the project, structure the HTML, style with CSS, and implement responsive design. Master techniques for crafting the navbar, logo, navigation menu, dropdown functionality, and background image. Explore media queries for adaptability across devices and incorporate jQuery for enhanced interactivity. By the end, gain the skills to design and implement a professional-grade responsive dropdown menu bar.