A Radix kit based on Apigee Kickstart for easy theme customization.
From the root of your Apigee Devportal Kickstart site, run the following command:
$ drush --include="web/themes/contrib/radix" radix:create "NAME OF SUBTHEME" --kit=https://github.com/arshad/radix-kit-apigee_custom/archive/master.zip
This will create a new subtheme at /path/to/site/web/themes/custom.
Add your custom CSS styles in subtheme/css/subtheme.style.css and custom scripts in subtheme/js/subtheme.script.js.