/div>
            </div>
        </div>
    </section>

    <!-- Utilities Section -->
    <section id="utilities" class="demo-section">
        <div class="container">
            <h2 class="h2 text-center mb-8">Utility Classes</h2>
            
            <h3 class="h4 mb-4">Display Utilities</h3>
            <div class="demo-utility-grid mb-6">
                <div class="card p-4">
                    <div class="d-block">.d-block</div>
                </div>
                <div class="card p-4">
    