class CustomNavbar extends HTMLElement {
  connectedCallback() {
    this.attachShadow({ mode: 'open' });
    this.shadowRoot.innerHTML = `
      <style>
        nav {
          background: rgba(255, 255, 255, 0.1);
          backdrop-filter: blur(10px);
          border-bottom: 1px solid rgba(255, 255, 255, 0.2);
          padding: 1rem 2rem;
          display: flex;
          justify-content: space-between;
          align-items: center;
          position: sticky;
          top: 0;
          z-index: 1000;
        }
        .logo {
          color: white;
          font-weight: bold;
          font-size: 1.5rem;
          background: linear-gradient(135deg, #667eea, #764ba2);
          -webkit-background-clip: text;
          -webkit-text-fill-color: transparent;
          background-clip: text;
        }
        ul {
          display: flex;
          gap: 2rem;
          list-style: none;
          margin: 0;
          padding: 0;
        }
        a {
          color: white;
          text-decoration: none;
          transition: all 0.3s ease;
          padding: 0.5rem 1rem;
          border-radius: 0.5rem;
          font-weight: 500;
        }
        a:hover {
          background: rgba(255, 255, 255, 0.1);
        }
        a.active {
          background: linear-gradient(135deg, #667eea, #764ba2);
        }
        @media (max-width: 768px) {
          nav {
            padding: 1rem;
            flex-direction: column;
            gap: 1rem;
          }
          ul {
            gap: 1rem;
          }
        }
      </style>
      <nav>
        <div class="logo">JCode Evolution</div>
        <ul>
          <li><a href="/">Home</a></li>
          <li><a href="/timeline.html">Timeline</a></li>
          <li><a href="/features.html">Features</a></li>
          <li><a href="/changelog.html">Full Log</a></li>
        </ul>
      </nav>
    `;
  }
}

customElements.define('custom-navbar', CustomNavbar);