Bpmn-js-properties-panel css

I am integrating properties panel in to the modeller. Are there any predefined css that are provided that need to be applied in app for the properties panel? I see some less files in the panel project, How do I need to build and use them?

Thanks and Regards

You are using npm?

You can use lessc.

npm install lessc

node_modules/.bin/less styles/properties.less > properties.css