class CustomSidebar extends HTMLElement {
  connectedCallback() {
    this.attachShadow({ mode: 'open' });
    this.shadowRoot.innerHTML = `
      <style>
        :host {
          display: block;
          width: 280px;
          background-color: #ffffff;
          border-right: 1px solid #e2e8f0;
          height: 100vh;
          padding: 1.5rem;
        }
        
        .sidebar-header {
          margin-bottom: 2rem;
        }
        
        .logo {
          font-size: 1.5rem;
          font-weight: 600;
          color: #5aa58b;
          margin-bottom: 1rem;
          font-family: 'Inter', sans-serif;
        }
        
        .new-btn {
          width: 100%;
          padding: 0.75rem;
          background-color: #8bd8bd;
          color: white;
          border: none;
          border-radius: 8px;
          font-weight: 500;
          cursor: pointer;
          transition: all 0.2s;
          font-family: 'Inter', sans-serif;
        }
        
        .new-btn:hover {
          background-color: #5aa58b;
        }
        
        nav ul {
          list-style: none;
        }
        
        nav li {
          margin-bottom: 0.5rem;
        }
        
        nav a {
          display: flex;
          align-items: center;
          padding: 0.75rem;
          border-radius: 8px;
          color: #4a5568;
          text-decoration: none;
          transition: all 0.2s;
          font-family: 'Inter', sans-serif;
        }
        
        nav a:hover {
          background-color: #c0f0e2;
          color: #5aa58b;
        }
        
        .active a {
          background-color: #c0f0e2;
          color: #5aa58b;
          font-weight: 500;
        }
        
        .icon {
          margin-right: 0.75rem;
          font-size: 1.1rem;
        }
      </style>
      
      <div class="sidebar-header">
        <div class="logo">MindFlow</div>
        <button class="new-btn">+ New</button>
      </div>
      
      <nav>
        <ul>
          <li class="active"><a href="#"><span class="icon">📝</span> Notes</a></li>
          <li><a href="#"><span class="icon">📊</span> Trackers</a></li>
          <li><a href="#"><span class="icon">🗂️</span> Databases</a></li>
          <li><a href="#"><span class="icon">⚙️</span> Settings</a></li>
        </ul>
      </nav>
    `;
    
    // Add event listeners
    this.shadowRoot.querySelector('.new-btn').addEventListener('click', () => {
      this.dispatchEvent(new CustomEvent('new-note'));
    });
  }
}

customElements.define('custom-sidebar', CustomSidebar);