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For next time, just right-click the text you're trying to identify the font for, hit "Inspect" and click "Computed" on the right in the styles sidebar. And you'll see `font-family`.

You'll often see multiple listed, like `-apple-system, "SF Pro Text", Helvetica, sans-serif` in this case. It tries to use them from left to right.

Browsers typically say below the styles also which fonts are actually used (there can be multiple, e.g. when substitution is required to render certain characters).

It uses: SF Display, SF Mono, and SF Text, designed by Apple.

In case you come across other website fonts you like, you can use https://fontofweb.com to get their names.

Disclaimer: I'm the creator

The sans is Apple's own SF Pro, and the code is SF Mono.