Caveats
Arbitrary comments are not supported. Providing a high level of flexibility for previewing and modifying custom styles requires a sophisticated parsing system. Maintaining comments that are bound to any particular element in the stylesheet is prohibitively expensive compared to the value it would add. Although we are working to include this as an option in the future, currently all comments are stripped from the child theme stylesheet code.
No @keyframes or @font-face rules. Child Theme Configurator only supports @media and @import. If you need other @rules, put them in a separate stylesheet and import them into the Child Theme stylesheet.
Only two-color gradients. Child Theme Configurator is powerful, but we have simplified the gradient interface. You can use any gradient you want as long as it has two colors and no intermediate stops.
CSS properties are auto-discovered. Child Theme Configurator loads the properties that exist in the Parent stylesheet. You can always add new properties using the “Raw CSS” text area.
Legacy gradient syntax is not supported. Child Theme Configurator does not support the MS filter gradient or legacy webkit gradient. These will continue to work if they are used in the parent theme, but will not be written to the child theme stylesheet. If there is a demand, we may add it in a future release, but most users should have upgraded by now.
Documentation