Professional Corporate Portfolio Website

I need a clean, professional-looking business portfolio site built from scratch with plain HTML, CSS and vanilla JavaScript. The overall feel should be polished and corporate rather than flashy, so think balanced white-space, restrained colour palette and clear typography that frames content without distracting from it.

The site must be fully responsive, rendering smoothly on desktop, tablet and mobile. Please deliver well-structured, commented source files and any assets you use, ready for me to drop onto my hosting. A short README that explains file organisation and how to tweak colours or images will help me maintain the site after hand-over.

I’m happy to provide logo, copy and any imagery once we get started, but the core layout, styling and interactive touches will be your responsibility. Cross-browser testing in the latest Chrome, Firefox, Safari and Edge rounds out the brief.