Responsive text sizes

Site URL: https://www.charlottefeldforth.com/

When I look at my site on a large desktop the size of the type is way too small. When I scale the size of the window down to mock up a smaller screen size the type jumps up in size (to a much better proportion.)

I don't want the type to reduce in size as the screen gets bigger! At the very least I'd like it to stay the same size. Any ideas?