class CustomNavbar extends HTMLElement {
    connectedCallback() {
        this.attachShadow({ mode: 'open' });
        this.shadowRoot.innerHTML = `
            <style>
                .navbar {
                    transition: all 0.3s ease;
                }
                .nav-link {
                    position: relative;
                }
                .nav-link::after {
                    content: '';
                    position: absolute;
                    width: 0;
                    height: 2px;
                    bottom: -2px;
                    left: 0;
                    background-color: #4f46e5;
                    transition: width 0.3s ease;
                }
                .nav-link:hover::after {
                    width: 100%;
                }
            </style>
            <nav class="navbar bg-white shadow-sm py-4 px-6">
                <div class="container mx-auto flex justify-between items-center">
                    <a href="index.html" class="flex items-center space-x-2">
                        <i data-feather="activity" class="text-indigo-600"></i>
                        <span class="text-xl font-bold text-gray-800">Biogram</span>
</a>
                    
                    <div class="hidden md:flex space-x-8">
                        <a href="index.html" class="nav-link text-gray-700 hover:text-indigo-600">Home</a>
                        <a href="simulations.html" class="nav-link text-gray-700 hover:text-indigo-600">Simulations</a>
                        <a href="about.html" class="nav-link text-gray-700 hover:text-indigo-600">About</a>
                        <a href="contact.html" class="nav-link text-gray-700 hover:text-indigo-600">Contact</a>
                    </div>
                    
                    <div class="flex items-center space-x-4">
                        <button class="md:hidden focus:outline-none" id="mobile-menu-button">
                            <i data-feather="menu"></i>
                        </button>
                        <a href="https://www.biointeractive.org" target="_blank" class="hidden md:block px-4 py-2 rounded-md bg-indigo-600 text-white hover:bg-indigo-700 transition">Partners</a>
</div>
                </div>
                
                <!-- Mobile menu -->
                <div class="md:hidden hidden bg-white py-4 px-6" id="mobile-menu">
                    <div class="flex flex-col space-y-4">
                        <a href="index.html" class="text-gray-700 hover:text-indigo-600">Home</a>
                        <a href="simulations.html" class="text-gray-700 hover:text-indigo-600">Simulations</a>
                        <a href="about.html" class="text-gray-700 hover:text-indigo-600">About</a>
                        <a href="contact.html" class="text-gray-700 hover:text-indigo-600">Contact</a>
                        <a href="https://www.labxchange.org" target="_blank" class="px-4 py-2 rounded-md bg-indigo-600 text-white hover:bg-indigo-700 text-center">Resources</a>
</div>
                </div>
            </nav>
        `;
        
        // Mobile menu toggle
        const menuButton = this.shadowRoot.getElementById('mobile-menu-button');
        const mobileMenu = this.shadowRoot.getElementById('mobile-menu');
        
        menuButton.addEventListener('click', () => {
            const isHidden = mobileMenu.classList.contains('hidden');
            if (isHidden) {
                mobileMenu.classList.remove('hidden');
                feather.replace();
            } else {
                mobileMenu.classList.add('hidden');
            }
        });
    }
}
customElements.define('custom-navbar', CustomNavbar);