class CustomHeader extends HTMLElement {
  connectedCallback() {
    this.attachShadow({ mode: 'open' });
    this.shadowRoot.innerHTML = `
      <style>
        :host {
          display: block;
        }
        
        .header {
          position: fixed;
          top: 0;
          left: 0;
          width: 100%;
          z-index: 1000;
          transition: all 0.3s ease;
          background: rgba(15, 23, 42, 0.9);
          backdrop-filter: blur(10px);
          border-bottom: 1px solid rgba(147, 51, 234, 0.2);
        }
        
        .header.scrolled {
          background: rgba(15, 23, 42, 0.95);
          box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        
        .container {
          max-width: 1200px;
          margin: 0 auto;
          padding: 1rem 2rem;
          display: flex;
          justify-content: space-between;
          align-items: center;
        }
        
        .logo {
          font-size: 1.5rem;
          font-weight: 800;
          background: linear-gradient(90deg, #9333ea, #7e22ce);
          -webkit-background-clip: text;
          -webkit-text-fill-color: transparent;
          text-decoration: none;
        }
        
        .nav-links {
          display: flex;
          gap: 2rem;
        }
        
        .nav-links a {
          color: #e2e8f0;
          text-decoration: none;
          font-weight: 500;
          transition: color 0.3s;
          position: relative;
        }
        
        .nav-links a:hover {
          color: #9333ea;
        }
        
        .nav-links a::after {
          content: '';
          position: absolute;
          bottom: -5px;
          left: 0;
          width: 0;
          height: 2px;
          background: #9333ea;
          transition: width 0.3s;
        }
        
        .nav-links a:hover::after {
          width: 100%;
        }
        
        .mobile-menu-btn {
          display: none;
          background: none;
          border: none;
          color: white;
          font-size: 1.5rem;
          cursor: pointer;
        }
        
        @media (max-width: 768px) {
          .nav-links {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            background: rgba(15, 23, 42, 0.95);
            flex-direction: column;
            padding: 1rem;
            gap: 1rem;
          }
          
          .nav-links.active {
            display: flex;
          }
          
          .mobile-menu-btn {
            display: block;
          }
        }
      </style>
      
      <header class="header">
        <div class="container">
          <a href="#" class="logo">SUNFIXER | OVM</a>
          
          <button class="mobile-menu-btn">
            <i data-feather="menu"></i>
          </button>
          
          <nav class="nav-links">
            <a href="#music">Music</a>
            <a href="#events">Events</a>
            <a href="#about">About</a>
            <a href="#contact">Contact</a>
          </nav>
        </div>
      </header>
    `;
    
    // Mobile menu toggle
    const menuBtn = this.shadowRoot.querySelector('.mobile-menu-btn');
    const navLinks = this.shadowRoot.querySelector('.nav-links');
    
    menuBtn.addEventListener('click', () => {
      navLinks.classList.toggle('active');
      const menuIcon = menuBtn.querySelector('i');
      if (navLinks.classList.contains('active')) {
        menuIcon.setAttribute('data-feather', 'x');
      } else {
        menuIcon.setAttribute('data-feather', 'menu');
      }
      feather.replace();
    });
    
    // Close menu when clicking a link
    this.shadowRoot.querySelectorAll('.nav-links a').forEach(link => {
      link.addEventListener('click', () => {
        navLinks.classList.remove('active');
        const menuIcon = menuBtn.querySelector('i');
        menuIcon.setAttribute('data-feather', 'menu');
        feather.replace();
      });
    });
  }
}

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