Unfortunately, checkboxes and radio buttons are not so easy to design with CSS. Sara shows how you can implement it with SVG graphics and also barrier-free.
Automatic accessibility tests are good and useful. But they are no substitute for manual testing. Manuel shows a few practical tips on how to test in his blog post.
Many valuable new features in CSS are now supported by browsers. postcss-preset-env is an exciting tool for using even more future possibilities today.