How do I get my website to scale perfectly like this site?

[Julian201720 (Julian Kreth)]

You can archive this by using relative units.

So instead of pixels. you can use REM (this scales with your base font size) or VH/VW (this stands for viewport height and viewport width).

Here is a great article about that:

Vh and vw: how and why to use them in Webflow | Webflow Blog