navbar.html

<nav class="navbar bd-navbar navbar-expand-lg fixed-top">
  <div class="container-xxl bd-gutter flex-wrap flex-lg-nowrap">
    <!-- Brand -->
    <a class="navbar-brand" href="#">Navbar</a>
    
    <!-- Toggler -->
    <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
      <i class="bi bi-list fs-1"></i>
    </button>
    
    <!-- Navbar Content -->
    <div class="collapse navbar-collapse scrollable-navbar" id="navbarNav">
      <ul class="navbar-nav me-auto mb-2 mb-lg-0">
        <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="#">Link</a>
        </li>
        <li class="nav-item dropdown">
          <a class="nav-link dropdown-toggle" role="button" data-bs-toggle="dropdown" aria-expanded="false">
            Dropdown
          </a>
          <ul class="dropdown-menu">
            <li><a class="dropdown-item" href="#">Action</a></li>
            <li><a class="dropdown-item" href="#">Another action</a></li>
            <li><hr class="dropdown-divider"></li>
            <li><a class="dropdown-item" href="#">Something else here</a></li>
          </ul>
        </li>
        <li class="nav-item">
          <a class="nav-link disabled" aria-disabled="true">Disabled</a>
        </li>
      </ul>
      
      <!-- Search -->
      <form class="d-flex mx-lg-2" 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>
      
      <!-- Divider for larger screens -->
      <div class="vr d-none d-lg-flex mx-2 my-1 nav-line"></div>

      <!-- Divider for smaller screens -->
      <hr class="d-lg-none nav-line">
      
      <!-- Theme Dropdown -->
      <ul class="navbar-nav">
        <li class="nav-item dropdown">
          <button class="btn btn-link nav-link dropdown-toggle" type="button" id="themeDropdown" data-bs-toggle="dropdown" aria-expanded="false">
            <i class="bi bi-circle-half"></i>
	    <span class="d-lg-none ms-2">Toggle theme</span>
          </button>
          <ul class="dropdown-menu dropdown-menu-end" aria-labelledby="themeDropdown">
            <li>
              <a class="dropdown-item align-items-center" data-theme="light">
                <i class="bi bi-sun-fill me-2 opacity-50"></i> Light
              </a>
            </li>
            <li>
              <a class="dropdown-item align-items-center" data-theme="dark">
                <i class="bi bi-moon-stars-fill me-2 opacity-50"></i> Dark
              </a>
            </li>
          </ul>
        </li>
      </ul>
    </div>
  </div>
</nav>