The main title is sized to 176 pixels on a Macbook Pro screen. It uses two breakpoints to scale the type to make sure it looks good on all screen sizes.
the other one is for the very large screens. It actually switches between units to size the type as well, it uses em for the smallest and largest screens and the vw for all the sizes in between. So Connor’s website uses both fluid and responsive typography. To inspect the website from the accessibility point of view, I changed my default browser font size to the largest and the type size did change. The website still looked good.