​

<nav>

  <input type="radio" name="radios" id="one"/>

  <label for="one" class="nav__button">Button One</label>

  <input type="radio" name="radios" id="two"/>

  <label for="two" class="nav__button">Button Two</label>

  <input type="radio" name="radios" id="three"/>

  <label for="three" class="nav__button">Button Three</label>

  <div class="nav__bottom"></div>

</nav>