Html Tailwind Guideline: Customization — Arbitrary Values. Description: Use [] for one-off values. Do: w-[350px] for specific needs. Don't: Creating config for single use. Good Example: top-[117px] (if strictly needed). Bad Example: style={{ top: '117px' }}. Severity: Low. Docs: https://tailwindcss.com/docs/adding-custom-styles#using-arbitrary-values.