class CustomNavbar extends HTMLElement {
  connectedCallback() {
    this.attachShadow({ mode: 'open' });
    this.shadowRoot.innerHTML = `
      <style>
        :host {
          display: block;
        }
        header {
          background: white;
          box-shadow: 0 2px 10px rgba(0,0,0,0.1);
          padding: 1rem 1.5rem;
          display: flex;
          justify-content: space-between;
          align-items: center;
          position: sticky;
          top: 0;
          z-index: 100;
        }
        .logo-container {
          display: flex;
          align-items: center;
          gap: 0.75rem;
        }
        .logo {
          background: linear-gradient(45deg, #6a11cb, #2575fc);
          width: 2.5rem;
          height: 2.5rem;
          border-radius: 0.5rem;
          display: flex;
          align-items: center;
          justify-content: center;
        }
        .logo svg {
          color: white;
          width: 1.5rem;
          height: 1.5rem;
        }
        .site-title {
          font-size: 1.25rem;
          font-weight: 700;
          color: #0f172a;
        }
        nav {
          display: none;
        }
        nav.desktop {
          display: flex;
          gap: 1.5rem;
        }
        nav a {
          color: #0f172a;
          text-decoration: none;
          font-weight: 500;
          transition: color 0.2s;
          padding: 0.5rem 1rem;
          border-radius: 0.5rem;
        }
        nav a:hover, nav a.active {
          color: #6a11cb;
          background-color: #f1f5f9;
        }
        .mobile-menu-btn {
          background: none;
          border: none;
          cursor: pointer;
          display: flex;
          align-items: center;
          justify-content: center;
        }
        .mobile-menu-btn svg {
          width: 1.5rem;
          height: 1.5rem;
          color: #0f172a;
        }
        .mobile-nav {
          position: fixed;
          top: 4rem;
          left: 0;
          right: 0;
          background: white;
          padding: 1rem;
          box-shadow: 0 2px 10px rgba(0,0,0,0.1);
          display: none;
          flex-direction: column;
          gap: 1rem;
        }
        .mobile-nav.active {
          display: flex;
        }
        @media (min-width: 768px) {
          nav {
            display: flex;
          }
          .mobile-menu-btn {
            display: none;
          }
          .mobile-nav {
            display: none !important;
          }
        }
      </style>
      <header>
        <div class="logo-container">
          <div class="logo">
            <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
              <path d="M12 2l2.5 5.5H20l-4 4 1.5 5.5L12 14l-5.5 3.5L8 12l-4-4h5.5L12 2z"/>
            </svg>
          </div>
          <div class="site-title">Birleşik Etiketleyici Pro</div>
        </div>
        <nav class="desktop">
          <a href="/" class="active">Ana Sayfa</a>
          <a href="/tagging.html">Etiketleme</a>
          <a href="/cl_tagger.html">CL Tagger</a>
          <a href="/tools.html">Araçlar</a>
          <a href="/settings.html">Ayarlar</a>
        </nav>
        <button class="mobile-menu-btn">
          <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
            <line x1="3" y1="12" x2="21" y2="12"></line>
            <line x1="3" y1="6" x2="21" y2="6"></line>
            <line x1="3" y1="18" x2="21" y2="18"></line>
          </svg>
        </button>
        <nav class="mobile-nav">
          <a href="/" class="active">Ana Sayfa</a>
          <a href="/tagging.html">Etiketleme</a>
          <a href="/cl_tagger.html">CL Tagger</a>
          <a href="/tools.html">Araçlar</a>
          <a href="/settings.html">Ayarlar</a>
        </nav>
      </header>
    `;

    const mobileMenuBtn = this.shadowRoot.querySelector('.mobile-menu-btn');
    const mobileNav = this.shadowRoot.querySelector('.mobile-nav');

    mobileMenuBtn.addEventListener('click', () => {
      mobileNav.classList.toggle('active');
    });
  }
}
customElements.define('custom-navbar', CustomNavbar);