Accordion

<details>
  <summary>What is Oat?</summary>
  <p>Oat is a minimal, semantic-first UI component library with zero dependencies.</p>
</details>

<details>
  <summary>How do I use it?</summary>
  <p>Include the CSS and JS files, then write semantic HTML. Most elements are styled by default.</p>
</details>

<details>
  <summary>Is it accessible?</summary>
  <p>Yes! It uses semantic HTML and ARIA attributes. Keyboard navigation works out of the box.</p>
</details>