class CustomHeader extends HTMLElement {
    connectedCallback() {
        this.attachShadow({ mode: 'open' });
        this.shadowRoot.innerHTML = `
            <style>
                header {
                    background: rgba(17, 24, 39, 0.8);
                    backdrop-filter: blur(10px);
                    border-bottom: 1px solid rgba(55, 65, 81, 0.5);
                }
                .container {
                    max-width: 1200px;
                    margin: 0 auto;
                    padding: 0 1rem;
                }
                nav {
                    display: flex;
                    align-items: center;
                    justify-content: space-between;
                    padding: 1rem 0;
                }
                .logo {
                    font-weight: 700;
                    font-size: 1.5rem;
                    background: linear-gradient(135deg, #a855f7, #ec4899);
                    -webkit-background-clip: text;
                    -webkit-text-fill-color: transparent;
                    background-clip: text;
                }
                .nav-links {
                    display: flex;
                    align-items: center;
                    gap: 2rem;
                }
                .nav-link {
                    color: #d1d5db;
                    text-decoration: none;
                    transition: color 0.2s;
                }
                .nav-link:hover {
                    color: white;
                }
                .theme-toggle {
                    background: none;
                    border: none;
                    color: #d1d5db;
                    cursor: pointer;
                    padding: 0.5rem;
                    border-radius: 0.375rem;
                    transition: all 0.2s;
                }
                .theme-toggle:hover {
                    color: white;
                    background: rgba(55, 65, 81, 0.5);
                }
                @media (max-width: 768px) {
                    .nav-links {
                        gap: 1rem;
                    }
                }
            </style>
            <header>
                <div class="container">
                    <nav>
                        <a href="index.html" class="logo">ComponentForge</a>
                        <div class="nav-links">
                            <a href="index.html" class="nav-link">New Project</a>
                            <a href="#" class="nav-link">Templates</a>
                            <a href="#" class="nav-link">Docs</a>
                            <button class="theme-toggle" id="themeToggle">
                                <i data-feather="moon"></i>
                            </button>
                        </div>
                    </nav>
                </div>
            </header>
        `;

        // Initialize feather icons in shadow DOM
        const featherScript = document.createElement('script');
        featherScript.src = 'https://unpkg.com/feather-icons';
        this.shadowRoot.appendChild(featherScript);
        
        featherScript.onload = () => {
            feather.replace();
            
            // Theme toggle functionality
            const themeToggle = this.shadowRoot.getElementById('themeToggle');
            themeToggle.addEventListener('click', () => {
                themeManager.toggleTheme();
                this.updateThemeIcon();
            });
        };
    }

    updateThemeIcon() {
        const themeIcon = this.shadowRoot.querySelector('#themeToggle i');
        if (themeManager.currentTheme === 'dark') {
            themeIcon.setAttribute('data-feather', 'sun');
        } else {
            themeIcon.setAttribute('data-feather', 'moon');
        }
        feather.replace();
    }
}

customElements.define('custom-header', CustomHeader);