class FinancialHeader extends HTMLElement {
    connectedCallback() {
        this.attachShadow({ mode: 'open' });
        this.shadowRoot.innerHTML = `
            <style>
                :host {
                    display: block;
                    width: 100%;
                }
                
                header {
                    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
                    color: white;
                    padding: 1rem 0;
                    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
                }
                
                .container {
                    max-width: 1200px;
                    margin: 0 auto;
                    padding: 0 1rem;
                }
                
                .nav-content {
                    display: flex;
                    justify-content: space-between;
                    align-items: center;
                }
                
                .logo {
                    display: flex;
                    align-items: center;
                    gap: 0.5rem;
                    font-weight: 700;
                    font-size: 1.5rem;
                }
                
                .nav-links {
                    display: flex;
                    gap: 2rem;
                    align-items: center;
                }
                
                .nav-link {
                    color: rgba(255, 255, 255, 0.9);
                    text-decoration: none;
                    transition: color 0.3s ease;
                    font-weight: 500;
                }
                
                .nav-link:hover {
                    color: white;
                }
                
                .mobile-menu-btn {
                    display: none;
                    background: none;
                    border: none;
                    color: white;
                    cursor: pointer;
                }
                
                @media (max-width: 768px) {
                    .nav-links {
                        display: none;
                        position: absolute;
                        top: 100%;
                        left: 0;
                        right: 0;
                        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
                        flex-direction: column;
                        padding: 1rem;
                        gap: 1rem;
                    }
                    
                    .nav-links.active {
                        display: flex;
                    }
                    
                    .mobile-menu-btn {
                        display: block;
                    }
                }
            </style>
            <header>
                <div class="container">
                    <nav class="nav-content">
                        <div class="logo">
                            <i data-feather="trending-up"></i>
                            <span>CashFlow Genius</span>
                        </div>
                        
                        <div class="nav-links">
                            <a href="#overview" class="nav-link">Visão Geral</a>
                            <a href="#revenues" class="nav-link">Receitas</a>
                            <a href="#expenses" class="nav-link">Despesas</a>
                            <a href="#projection" class="nav-link">Projeção</a>
                            <a href="#insights" class="nav-link">Insights</a>
                        </div>
                        
                        <button class="mobile-menu-btn">
                            <i data-feather="menu"></i>
                        </button>
                    </nav>
                </div>
            </header>
        `;
        
        // Initialize mobile menu
        this.initializeMobileMenu();
    }
    
    initializeMobileMenu() {
        const menuBtn = this.shadowRoot.querySelector('.mobile-menu-btn');
        const navLinks = this.shadowRoot.querySelector('.nav-links');
        
        menuBtn.addEventListener('click', () => {
            navLinks.classList.toggle('active');
            
            // Update icon
            const icon = menuBtn.querySelector('i');
            if (navLinks.classList.contains('active')) {
                icon.setAttribute('data-feather', 'x');
            } else {
                icon.setAttribute('data-feather', 'menu');
            }
            feather.replace();
        });
    }
}

customElements.define('financial-header', FinancialHeader);