Issue 6483 - Add Source Sans Pro as default font to website-defaults

static/scss/main.scss

 /*!
  * This file is part of website-defaults
  * Copyright (C) 2016-present eyeo GmbH
  *
  * website-defaults is free software: you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
  *
  * website-defaults is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with website-defaults.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 @import "variables";
 @import "utilities/overrides.scss";
 @import "utilities/colors.scss";
 @import "utilities/layout.scss";
 @import "utilities/text.scss";
 @import "utilities/widths.scss";
+@import "fonts";
 @import "reset";
 @import "base";
 @import "content";
 @import "grid";
 @import "navbar";
 @import "forms/basic";
 @import "forms/advanced";
 @import "forms/buttons";