The font is Inter. Inter is a typeface family optimized for user interfaces and computer screens. Samples and downloads can be found at: https://rsms.me/inter/. Inter is open-source.
The CSS toolkit is Tachyons. I also used BrowserSync to build. I used Sketch in planning the design.
This website was designed and coded by me. I was heavily inspired by Swiss poster designs. Inter and Tachyons were the perfect tools to help me achieve my goals.