class CustomHeader extends HTMLElement {
  connectedCallback() {
    this.attachShadow({ mode: 'open' });
    this.shadowRoot.innerHTML = `
      <style>
        header {
          background-color: #1e40af;
          color: white;
          padding: 1rem 0;
          box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
        }
        .container {
          max-width: 1200px;
          margin: 0 auto;
          padding: 0 1rem;
        }
        .logo {
          font-size: 1.5rem;
          font-weight: bold;
          display: flex;
          align-items: center;
          gap: 0.5rem;
        }
      </style>
      <header>
        <div class="container">
          <div class="logo">
            <i data-feather="layout"></i>
            <span>DualView Delight</span>
          </div>
        </div>
      </header>
    `;
  }
}
customElements.define('custom-header', CustomHeader);