header

<header>
    <nav class="navbar bg-body-tertiary" style="background-color: aquamarine;">
        <div class="container-fluid justify-content-center">
          <div class="center"><a class="navbar-brand">Navbar</a></div>
          <!-- <form class="d-flex" role="search">
            <input class="form-control me-2" type="search" placeholder="Search" aria-label="Search">
            <button class="btn btn-outline-success" type="submit">Search</button>
          </form> -->
        </div>
      </nav>
      <div class="secondary_nav">
        <ul class="nav justify-content-center" style="background-color: aqua;">
            <li class="nav-item">
              <a class="nav-link active" aria-current="page" href="#">Home</a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="#">Learn</a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="#">Profile</a>
            </li>
          </ul>
      </div>
  </header>