startbootstrap/startbootstrap-grayscale ? reverse-engineered prompt

Build me a clean one page Bootstrap website theme with a dark grayscale look, like a polished landing page that works for a portfolio, small business, or personal site.

I want a full responsive page with a top navigation bar, a big hero section, a few content sections, call to action buttons, and a simple contact area, all styled to feel minimal and modern. Make sure it looks good on mobile and desktop, and that the main content can be edited easily from the project files. If there are source files for the styles and page content, wire those up so I can run the project, make changes, and see them live right away.

Please keep it lightweight, clean, and ready to customize. If you need to check the latest docs or best practices for Bootstrap while building it, go ahead and look them up online.