Comment by mg

CTRL+u gives a nice example of the syntax.

For example to make a box with rounded corners and a top and bottom section, all you need is this intuitive one-liner:

<div class="mt-5 mb-8 first:mt-0 last:mb-0 relative overflow-hidden rounded-2xl"><div class="pt-2 bg-slate-800 shadow-lg group"><div class="flex text-slate-400 text-xs leading-6"><div class="flex-none text-sky-300 border-t border-b border-t-transparent border-b-sky-300 px-4 py-1 flex items-center">app.css</div><div class="flex-auto flex items-center bg-slate-700/50 border border-slate-500/30 rounded-tl"></div></div><div class="children:my-0 children:!shadow-none children:bg-transparent"><pre class="language-css"><code class="language-css"><span class="token atrule"><span class="token rule">@import</span> <span class="token string">"tailwindcss"</span><span class="token punctuation">;</span></span></code></pre></div></div><div class="pointer-events-none absolute inset-0 rounded-2xl dark:ring-1 dark:ring-white/10 dark:ring-inset" aria-hidden="true"></div></div>