Okay, looking at resp- well, firstly, I have zero issues with typography, everything is clear and whatnot. I mean, like I said initially, nothing special, I described it earlier as 'template-y', there's not attempt at a unique font, or super large or small font-sizes, rotated text, etc, but what you've done, has been done well.
Looking at responsivity, you can see the middle icon doesn't scale like the others do, you can also see that they scale "up", leaving a big gap relative to the text below. But most importantly, I'd actually recommend switching from a horizontal row of 3 icons, to a vertical list on mobile. It'd not only fill up some space, but it'd also just fit the mobile norm.
On the About Us page, the header is perfect, but the body text is too small, I think my go to is 1.5x. Your h1, h2, h3, h4, ... p, subtitles, captions, etc, should all be relative to each other by some consistent factor - not guess work. Both font-size and the spacing between them convey importance and relevance to each other.
Looking at the homepage - you know, when I said 'zero issues with typography' that referred solely to the desktop version, on mobile the font-sizes could be improved for readability for sure. The unnecessary large gaps not only 'feel' weird (because the large gaps make it feel like text which should be grouped together, aren't and thus brain gets confused) but also means that you have less space to use a large font-size, leading to bad readability. Also, that font-weight in the body, seems like a 'light' instead of a 'regular' - bump it up a notch - to match the font-weight of that of the paragraph in the green section.
Talking about the green section, wtf? There's no reason for "BEST USER RESEARCH" to be split in middle to go to the new line, you can use a instead of a space ( ) to fix it using HTML alone. And, that white line just looks completely out of place.
sterile flint
warm crystal
gloomy tapir
glass crown
