Mobile navigation drawer

<div class="cmp-mobile-drawer">
  <button class="cmp-mobile-drawer__open" type="button" aria-haspopup="dialog">Open menu</button>
  <div class="cmp-mobile-drawer__backdrop" hidden></div>
  <aside
    class="cmp-mobile-drawer__panel"
    role="dialog"
    aria-modal="true"
    aria-label="Site navigation"
    hidden
  >
    <div class="cmp-mobile-drawer__head">
      <strong>Northstar</strong
      ><button class="cmp-mobile-drawer__close" type="button">Close</button>
    </div>
    <nav aria-label="Mobile navigation">
      <a href="#services">Services</a><a href="#projects">Projects</a><a href="#about">About</a
      ><a href="#contact">Contact</a>
    </nav>
    <p>Available Monday–Friday, 8am–6pm.</p>
  </aside>
</div>