title: Tailwind arbitrary background-position values
body: <p>The docs say that with the <code>jit</code> mode you can use arbitrary values for background positioning, giving the example:</p>
  <p><code>&lt;div class=&quot;bg-[center_top_1rem]&quot;&gt;</code></p>
  <p>But this isn't an arbitrary css value like say <code>80px</code>.</p>
  <p>Is there any documentation for this syntax?</p>
  <p>1rem obviously offsets the <code>top</code> value, but how would I also offset the <code>center</code>? My guess of <code>bg-[center_2rem_top_1rem]</code> doesn't work.</p>
  <p>I'm also surprised that something like <code>bg-[0% 20%]</code> doesn't work, especially as I've seen it suggested as answers to other questions.</p>
  <p>Thanks</p>