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HTML/CSSAdvanced#css#cross-browser
Tailwind uses prefixes like sm:, md:, lg: for min-width breakpoints (mobile-first) and hover:, focus:, disabled:, dark: for state/condition variants, applied directly to utility classes without writing separate media queries.
<button class="bg-blue-500 hover:bg-blue-700 disabled:opacity-50 md:px-8 dark:bg-blue-900"> Submit </button>