components/header.js

class CustomHeader extends HTMLElement {
  connectedCallback() {
    this.attachShadow({ mode: 'open' });
    this.shadowRoot.innerHTML = `
      <style>
        :host {
          display: block;
        }
        
        * {
          margin: 0;
          padding: 0;
          box-sizing: border-box;
        }
        
        header {
          background-color: rgba(17, 24, 39, 0.9);
          backdrop-filter: blur(10px);
          position: sticky;
          top: 0;
          z-index: 50;
          border-bottom: 1px solid rgba(55, 65, 81, 0.5);
        }
        
        .container {
          max-width: 1280px;
          margin: 0 auto;
          padding: 0 1rem;
        }
        
        nav {
          display: flex;
          justify-content: space-between;
          align-items: center;
          padding: 1.5rem 0;
        }
        
        .logo {
          display: flex;
          align-items: center;
          font-weight: 700;
          font-size: 1.5rem;
          color: #f9fafb;
          text-decoration: none;
        }
        
        .logo span {
          color: #818cf8;
        }
        
        .nav-links {
          display: flex;
          gap: 2rem;
          align-items: center;
        }
        
        .nav-link {
          color: #9ca3af;
          text-decoration: none;
          font-weight: 500;
          transition: color 0.3s ease;
        }
        
        .nav-link:hover {
          color: #e5e7eb;
        }
        
        .nav-button {
          background-color: transparent;
          color: #c7d2fe;
          border: 1px solid #4f46e5;
          padding: 0.5rem 1.5rem;
          border-radius: 0.5rem;
          font-weight: 500;
          transition: all 0.3s ease;
        }
        
        .nav-button:hover {
          background-color: #4f46e5;
          color: white;
        }
        
        .mobile-menu-button {
          display: none;
          background: none;
          border: none;
          color: #9ca3af;
        }
        
        .mobile-menu {
          display: none;
          position: absolute;
          top: 100%;
          left: 0;
          right: 0;
          background-color: #1f2937;
          padding: 1rem;
          border-top: 1px solid #374151;
        }
        
        .mobile-nav-links {
          display: flex;
          flex-direction: column;
          gap: 1rem;
        }
        
        @media (max-width: 768px) {
          .nav-links {
            display: none;
          }
          
          .mobile-menu-button {
            display: block;
          }
          
          .mobile-menu-button:hover {
            color: #e5e7eb;
          }
        }
      </style>
      
      <header>
        <div class="container">
          <nav>
            <a href="#" class="logo">Orbit<span>Premium</span></a>
            
            <div class="nav-links">
              <a href="#" class="nav-link">Home</a>
              <a href="#" class="nav-link">Features</a>
              <a href="#" class="nav-link">Pricing</a>
              <a href="#" class="nav-link">About</a>
              <a href="#" class="nav-button">Sign In</a>
            </div>
            
            <button id="mobile-menu-button" class="mobile-menu-button">
              <i data-feather="menu" class="w-6 h-6"></i>
            </button>
          </nav>
          
          <div id="mobile-menu" class="mobile-menu hidden">
            <div class="mobile-nav-links">
              <a href="#" class="nav-link">Home</a>
              <a href="#" class="nav-link">Features</a>
              <a href="#" class="nav-link">Pricing</a>
              <a href="#" class="nav-link">About</a>
              <a href="#" class="nav-button">Sign In</a>
            </div>
          </div>
        </div>
      </header>
    `;
    
    // Initialize feather icons in shadow DOM
    const featherScript = document.createElement('script');
    featherScript.src = 'https://cdn.jsdelivr.net/npm/feather-icons/dist/feather.min.js';
    featherScript.onload = () => {
      feather.replace();
    };
    this.shadowRoot.appendChild(featherScript);
  }
}

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