Build a responsive Online Course Platform featuring a public course marketplace and a structured video learning workspace. The marketplace must display course cards with filter tags, instructor profile avatars, ratings, and price tags. Build a comprehensive course landing page displaying detailed syllabus structures, lesson previews, student reviews, author bios, and a Stripe payment checkout trigger. Implement a distraction-free video course player view containing a collapsible sidebar curriculum menu, video player workspace, lesson completion toggles, note-taking tabs, and downloadable lesson resource attachments. Automatically update the student's overall course completion progress bar when lessons are marked complete. Include downloadable course completion certificates with verification codes, dynamic quiz assessment modules, and email notifications. Provide an interactive student portal displaying enrolled courses and certificate achievements. Finally, provide an Instructor Management Portal enabling creators to build new course curricula, create structured modules, upload lesson video links, manage enrolled student rosters, handle student discussions, and monitor revenue analytics.