title: Can I replace the expand icon (▶) of the <details> element?
body: <p>I use the <code>&lt;details&gt;</code> element in my website and I want to change the design of the expand/collapse arrows. Is it possible to set a picture instead of the existing characters?</p>
  <p>Also, is it possible to change the position of the arrows? I want it to be on the right side and not next to the summary text.</p>