Dropdown component

html

<div style="min-height: 200px; position: relative">
  <nav id="my-dropdown" class="c-dropdown" role="navigation" aria-hidden="true" aria-labelledby="my-dropdown-btn">
    <div class="c-dropdown__inner">
      <ul class="c-dropdown__menu">
        <li class="c-dropdown__item">
          <div class="c-hamburger-btn" role="button" aria-expanded="false" aria-controls="my-dropdown">
            <div class="c-hamburger-btn__bars">
              <div class="c-hamburger-btn__bar"></div>
              <div class="c-hamburger-btn__bar"></div>
              <div class="c-hamburger-btn__bar"></div>
            </div>
            <div class="c-hamburger-btn__label">MENU</div>
          </div>
        </li>
        <li class="c-dropdown__item"><a href="#">menu</a></li>
        <li class="c-dropdown__item"><a href="#">menu</a></li>
        <li class="c-dropdown__item c-dropdown__item--has-submenu">
          <a href="#">menu</a>
          <button class="c-dropdown__toggle" aria-expanded="false">
            <span class="c-ic-angle-right" aria-hidden="true"></span>
          </button>
          <ul class="c-dropdown__submenu" aria-hidden="true">
            <li class="c-dropdown__subitem"><a href="#">submenu</a></li>
            <li class="c-dropdown__subitem"><a href="#">submenu</a></li>
          </ul>
        </li>
      </ul>
    </div>
  </nav>
</div>

<button id="my-dropdown-btn" class="c-hamburger-btn" aria-expanded="false" aria-controls="my-dropdown">
  <span class="c-hamburger-btn__bars">
    <span class="c-hamburger-btn__bar"></span>
    <span class="c-hamburger-btn__bar"></span>
    <span class="c-hamburger-btn__bar"></span>
  </span>
  <span class="c-hamburger-btn__label">MENU</span>
</button>