How this site was built and what was used to do it
This site is entirely static HTML, with CSS for styling.
It contains no decorative images, all images are informational (the screenshots of websites).
How the Minimalism was achieved
That way I can write all the pages using markdown, but have the flexibility of not only including HTML, but of adding commonly used sections as includes, or as page templates.
You can see the framework on github.
The CSS is rendered using SASS. The scss file contains the variables for colours and mixins for items such as the generated coloured blocks to denote the site section.
The main site HTML template contains all common elements such as the navigation and the footer and the logo, which is four lines of markup and unlike a png image, will scale.
The site will reduce in width easily to fill its container, up to a maximum readable width. The site is fluid, rather than responsive. The only responsive elements are on pages with marginalia, such as this case study on responsive design.