text: const postCss = require('postcss')
  	, customProperties = require('postcss-custom-properties')
  	, autoPrefixer = require('autoprefixer')
  	, cssNano = require('cssnano');
  
  module.exports = postCss([
  	customProperties({ preserve: true }),
  	autoPrefixer({
  		overrideBrowserslist: [
  			'>1%',
  			'last 2 versions',
  			'Firefox ESR',
  			'not dead',
  			'not ie <= 11',
  		],
  		flexbox: 'no-2009',
  		grid: true,
  	}),
  	cssNano({
  		preset: ['advanced', {
  			zindex: false,
  		}],
  	}),
  ]);
  