class CustomNavbar extends HTMLElement {
  connectedCallback() {
    this.attachShadow({ mode: 'open' });
    this.shadowRoot.innerHTML = `
      <style>
        nav {
          background: linear-gradient(135deg, #7f1d1d 0%, #450a0a 100%);
          padding: 1rem 2rem;
          display: flex;
          justify-content: space-between;
          align-items: center;
          box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
        }
        .logo { 
          color: white; 
          font-weight: bold; 
          font-size: 1.5rem;
          text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
          display: flex;
          align-items: center;
          gap: 0.5rem;
        }
        ul { 
          display: flex; 
          gap: 1.5rem; 
          list-style: none; 
          margin: 0; 
          padding: 0; 
        }
        a { 
          color: white; 
          text-decoration: none; 
          transition: all 0.3s;
          font-weight: 500;
          padding: 0.5rem 1rem;
          border-radius: 0.25rem;
        }
        a:hover { 
          background-color: rgba(255,255,255,0.1); 
        }
        .active {
          background-color: rgba(220, 38, 38, 0.5);
        }
      </style>
      <nav>
        <div class="logo">
          <span>☭</span>
          <span>Soviet Archives</span>
        </div>
        <ul>
          <li><a href="/">Presentation</a></li>
          <li><a href="/about.html">About</a></li>
          <li><a href="/bluetooth_jammer.html" class="active">Bluetooth Jammer</a></li>
        </ul>
</nav>
    `;
  }
}
customElements.define('custom-navbar', CustomNavbar);