<nav class="navbar navbar-expand-lg navbar-dark bg-dark">
    <div class="container">
      <a class="navbar-brand" href="#">PEMBU</a>
      <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
      </button>
      <div class="collapse navbar-collapse" id="navbarSupportedContent">
        <ul class="navbar-nav me-auto mb-2 mb-lg-0">
          <li class="nav-item">
            <a class="nav-link active" aria-current="page" href="/">Inicio</a>
          </li>
          <li class="nav-item">
            <a class="nav-link" href="https://sites.google.com/atmosfera.unam.mx/reunion-pembu-2021/inicio">Acerca de</a>
          </li>
          <li class="nav-item dropdown">
            <!-- nada por el momento -->
          </li>
          <li class="nav-item">
            <a class="nav-link" href="https://www.facebook.com/REDRUOAPEMBU/" tabindex="-1" aria-disabled="true">Contacto</a>
          </li>
        </ul>
  
      </div>
    </div>
  </nav>