first commit

wp-content/themes/twentytwentyone/postcss.config.js

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+module.exports = {
+	plugins: [
+		require('postcss-nested'),
+		require('postcss-css-variables')({
+			preserve: false,
+			preserveAtRulesOrder: true
+		}),
+		require('postcss-calc')({
+			precision: 0
+		}),
+		require('postcss-discard-duplicates'),
+		require('postcss-merge-rules')
+	]
+};