<header>
    <a href="./">
        <img src="school-portal.png" alt="Result Portal Logo" style="height: 50px;" />
    </a>
    <div class="menu-toggle" onclick="toggleMenu()">
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
    </div>
    <nav>
        <ul id="nav-list">
            <li><a href="./" class="nav-link <?php echo (basename($_SERVER['PHP_SELF']) == 'index.php') ? 'active' : ''; ?>">Home</a></li>
            <li><a href="./#features" class="nav-link">Features</a></li>
            <li><a href="./#testimonials" class="nav-link">Testimonials</a></li>
            <li><a href="./#demo" class="nav-link">CBT Demo</a></li>
            <li><a href="./#login" class="nav-link">Login</a></li>
            <li><a href="tutorials" class="nav-link <?php echo (basename($_SERVER['PHP_SELF']) == 'tutorials.php') ? 'active' : ''; ?>">Tutorial Videos</a></li>
            <li><a href="javascript:void(0)" class="nav-link">Tertiary Portal</a></li>
        </ul>
    </nav>
</header>