class CustomNavbar extends HTMLElement {
  connectedCallback() {
    this.attachShadow({ mode: 'open' });
    this.shadowRoot.innerHTML = `
      <style>
        nav {
          background: linear-gradient(135deg, #06b6d4 0%, #14b8a6 100%);
          padding: 1rem 2rem;
          display: flex;
          justify-content: space-between;
          align-items: center;
          box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
          position: sticky;
          top: 0;
          z-index: 100;
        }
        .logo {
          color: white;
          font-weight: bold;
          font-size: 1.5rem;
          display: flex;
          align-items: center;
        }
        .logo-icon {
          margin-right: 0.5rem;
        }
        ul {
          display: flex;
          gap: 1.5rem;
          list-style: none;
          margin: 0;
          padding: 0;
        }
        a {
          color: white;
          text-decoration: none;
          font-weight: 500;
          transition: opacity 0.2s;
          display: flex;
          align-items: center;
        }
        a:hover {
          opacity: 0.8;
        }
        .icon {
          margin-right: 0.5rem;
        }
        .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;
            right: 0;
            background: linear-gradient(135deg, #06b6d4 0%, #14b8a6 100%);
            flex-direction: column;
            padding: 1rem;
            gap: 1rem;
          }
          .nav-links.active {
            display: flex;
          }
          .mobile-menu-btn {
            display: block;
          }
          ul {
            flex-direction: column;
            gap: 1rem;
          }
        }
      </style>
      <nav>
        <div class="logo">
          <span class="logo-icon">🌊</span>
          <span>Wellness Wave</span>
        </div>
        <button class="mobile-menu-btn" id="menuBtn">☰</button>
        <div class="nav-links" id="navLinks">
          <ul>
            <li><a href="/"><i data-feather="home" class="icon" width="18" height="18"></i> Home</a></li>
            <li><a href="#"><i data-feather="heart" class="icon" width="18" height="18"></i> Features</a></li>
            <li><a href="#"><i data-feather="book" class="icon" width="18" height="18"></i> Diary</a></li>
            <li><a href="#"><i data-feather="target" class="icon" width="18" height="18"></i> Gym</a></li>
          </ul>
        </div>
      </nav>
    `;
    
    // Mobile menu toggle
    const menuBtn = this.shadowRoot.getElementById('menuBtn');
    const navLinks = this.shadowRoot.getElementById('navLinks');
    
    menuBtn.addEventListener('click', () => {
      navLinks.classList.toggle('active');
    });
    
    // Initialize feather icons after a short delay to ensure DOM is ready
    setTimeout(() => {
      const featherScript = document.createElement('script');
      featherScript.src = 'https://cdn.jsdelivr.net/npm/feather-icons/dist/feather.min.js';
      featherScript.onload = () => {
        if (typeof feather !== 'undefined') {
          feather.replace();
        }
      };
      this.shadowRoot.appendChild(featherScript);
    }, 100);
  }
}
customElements.define('custom-navbar', CustomNavbar);