Responsive HTML/CSS Corporate Site

I already have wireframes and visual mock-ups ready and now need them turned into a lean, standards-compliant corporate website. The build is pure HTML5 and CSS3, making thoughtful use of Flexbox and Grid so the layout fluidly adapts from desktop down to the smallest mobile screen. Code quality matters: I expect semantic tags, logical class names, and comments where helpful.

The site is small but must feel polished—Home, About Us, and Contact Us pages in a professional, corporate style. I’ll supply all copy, images, and colour guidelines; you focus on translating the design pixel-perfectly while keeping load times low and ensuring consistent rendering in Chrome, Safari, Edge, and Firefox.

Deliverables
• Three fully responsive pages matching the approved design
• Optimised assets and clean, well-commented HTML/CSS files
• Simple contact form stub (front-end only)
• Brief hand-over notes covering file structure and any build steps

Acceptance criteria: visual match at common breakpoints, Lighthouse performance score above 90, and no critical W3C validation errors.

Please share links to recent HTML/CSS projects you coded so I can review your styling approach and markup quality.