Progression: Describe how you would build a Learning Path Progression Tracker using JavaScript and CSS that visualizes a user's journey through a structured curriculum, where each course contains modules and each module contains lessons, displaying an ove

Build a "Learning Path Progression Tracker" — a JavaScript + CSS interface that visualizes a user's progression through a structured learning curriculum. Each course has modules, and each module has lessons. The tracker shows overall progression percentage, module-level completion, and unlockable achievements at key milestones.