<aside class="sidebar">
    <h3 class="logo">Star Server</h3>
    <ul>
        <li class="active" onclick="showSection('dashboard')">
            <i class="bi bi-speedometer2"></i> Dashboard
        </li>
        <li onclick="showSection('books')">
            <i class="bi bi-book"></i> Books
        </li>
        <li onclick="showSection('courses')">
            <i class="bi bi-journal-text"></i> Courses
        </li>
        <li>
            <i class="bi bi-people"></i> Users
        </li>
        <li>
            <i class="bi bi-box-arrow-right"></i> Logout
        </li>
    </ul>
</aside>
