class CustomHeader extends HTMLElement {
  connectedCallback() {
    this.attachShadow({ mode: 'open' });
    this.shadowRoot.innerHTML = `
      <style>
        nav {
          background-color: rgba(255, 255, 255, 0.8);
          backdrop-filter: blur(10px);
        }
        .nav-link {
          position: relative;
        }
        .nav-link::after {
          content: '';
          position: absolute;
          width: 0;
          height: 2px;
          bottom: 0;
          left: 0;
          background-color: #9ca3af;
          transition: width 0.3s ease;
        }
        .nav-link:hover::after {
          width: 100%;
        }
      </style>
      <header>
        <nav class="fixed w-full z-10 border-b border-gray-100 shadow-sm">
          <div class="container mx-auto px-4 py-4 flex justify-between items-center">
            <a href="/" class="text-2xl font-bold text-secondary-dark">Chromatic</a>
            
            <div class="hidden md:flex space-x-8 items-center">
              <a href="#" class="nav-link text-secondary-DEFAULT hover:text-secondary-dark">Explore</a>
              <a href="#" class="nav-link text-secondary-DEFAULT hover:text-secondary-dark">Create</a>
              <a href="#" class="nav-link text-secondary-DEFAULT hover:text-secondary-dark">Generate</a>
              <a href="#" class="nav-link text-secondary-DEFAULT hover:text-secondary-dark">About</a>
              
              <button id="color-mode-toggle" class="p-2 rounded-full hover:bg-gray-100">
                <i data-feather="moon" class="text-secondary-DEFAULT"></i>
              </button>
            </div>
            
            <button class="md:hidden p-2">
              <i data-feather="menu" class="text-secondary-DEFAULT"></i>
            </button>
          </div>
        </nav>
      </header>
    `;
  }
}
customElements.define('custom-header', CustomHeader);