umairzahid16005-ui/portfolio ? reverse-engineered prompt

Build me a personal developer portfolio website for Umair Zahid that feels modern, clean, and professional. It should have a dark theme, be fully responsive on mobile and desktop, and smoothly scroll between sections. Include a hero section, about me, skills, projects, and contact area, plus clear links to GitHub and LinkedIn. I also want a featured project section for UmairStore with a live demo preview, and a button to download my CV from the site. Make the navigation simple and mobile friendly, with a polished look that shows I’m a MERN stack developer. Use the content from the README as the guide, and make sure the site feels fast, easy to read, and ready to deploy on Vercel. If you need anything current from docs or best practices, look it up online first.