@siebenstein There are several ways to customize a theme. Have a look at Customization in the Grav docs. It shows the different options.
The quick and dirty way for testing:
- Add the font files In
/user/themes/quark/fonts
For exampleMonoton-Regular.ttf
- Add the following in
/user/themes/quark/css/custom.css
@font-face { font-family: 'Monoton'; font-style: normal; font-weight: 400; src: local('Monoton'), url(../fonts/Monoton-Regular.ttf); } h1 { font-family: 'Monoton', cursive; }
Refresh the browser and have look.
Of course this should be done in a child theme of quark. See the docs on Theme Inheritance for step-by-step tutorial.