Style sheets are written in Stylus format using the .styl file extension inside the styles directory.
body
color white
background-color blackOptionally you can define the loading order in your config.json. If you have 3 files called first.styl, second.styl and third.styl you can write:
"styles": [
"first",
"second",
"third"
]Files that have not been specified in the styles array are loaded in undefined order at the end.
You can add a global config.styl inside the styles directory which will be included before every single style you load. Make sure it only contains variable definitions (like colors) which have no impact on file size.