components/header.js

class CustomHeader extends HTMLElement {
    connectedCallback() {
        this.attachShadow({ mode: 'open' });
        this.shadowRoot.innerHTML = `
            <style>
                header {
                    background: linear-gradient(135deg, #3B82F6 0%, #1D4ED8 100%);
                    color: white;
                    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
                }
                
                .logo {
                    font-weight: 700;
                    letter-spacing: -0.025em;
                }
                
                nav a {
                    transition: all 0.2s ease;
                }
                
                nav a:hover {
                    opacity: 0.8;
                    transform: translateY(-1px);
                }
            </style>
            <header class="py-4 px-6">
                <div class="container mx-auto flex justify-between items-center">
                    <div class="logo text-2xl flex items-center">
                        <i data-feather="dollar-sign" class="mr-2"></i>
                        Software Spend Tracker
                    </div>
                    <nav class="hidden md:flex space-x-6">
                        <a href="#" class="flex items-center">
                            <i data-feather="home" class="mr-1"></i>
                            Dashboard
                        </a>
                        <a href="#" class="flex items-center">
                            <i data-feather="trending-up" class="mr-1"></i>
                            Analytics
                        </a>
                        <a href="#" class="flex items-center">
                            <i data-feather="settings" class="mr-1"></i>
                            Settings
                        </a>
                    </nav>
                    <button class="md:hidden">
                        <i data-feather="menu"></i>
                    </button>
                </div>
            </header>
        `;
    }
}

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