CSS for Font not working

Hi, in the free version i tried to use a google font. This CSS: @import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300&display=swap'); h1 { font-family: Montserrat; } It is changing in the backend, but not visible in frontend.   Website: https://imkeheggelmannco-b2ahejb7k3.live-website.com/ Another question - when i buy the Pro Version, are there all google fonts available? Thanks for help