Modern Responsive Portfolio Website

I need a clean, minimalistic portfolio built with vanilla HTML, CSS, and JavaScript. It must look crisp on mobile, tablet, and desktop, load quickly, and follow best-practice web performance techniques (semantic markup, compressed assets, lazy-loaded images).

Core sections I want included are:
• About Me
• Skills
• Projects
• Contact form (client-side validation, ready for easy back-end hook-up)

No existing branding assets are available, so you’ll have full creative freedom as long as the final result stays professional and understated. Animations should be subtle—think micro-interactions rather than large transitions—and the colour palette should support the minimalistic feel.

Please deliver thoroughly commented source files and a brief README that explains build steps (if any), folder structure, and how to adapt the contact form to a mail or API endpoint. Cross-browser checks on the latest Chrome, Firefox, Safari, and Edge are part of acceptance, alongside Lighthouse scores in the green for Performance and Accessibility.

If you have live examples of similar minimal sites, share them so I can quickly gauge fit and move forward.