I need a clean, professional-looking HTML user manual and I already have all the raw content—text, PNG screenshots, and short tutorial videos. Your task is to turn that material into a cohesive set of HTML pages that look good on desktop and mobile, load quickly, and keep everything self-contained. Here’s what matters most: • Text, images, and videos must flow naturally together, with each video embedded directly in the relevant section rather than linked out. • All screenshots are supplied as PNG and should retain their crispness without ballooning file size; basic optimization is welcome so long as image quality stays sharp. • The videos are MP4; please use standard HTML5 video tags with fallback text, custom controls that match the overall style, and no external hosting. • A simple, well-commented CSS file should drive the layout so future edits are easy. Deliverables: 1. Fully formatted HTML pages (one per manual section) 2. A single CSS file and any supporting assets organised in a clear folder structure 3. Brief hand-off notes explaining class names, media queries, and how to add future pages If you’ve built responsive documentation before, especially with embedded media, this should be straightforward. Let me see one similar sample and your estimated turnaround and we can get started right away.