components/header.js

class CustomHeader extends HTMLElement {
    connectedCallback() {
        this.attachShadow({ mode: 'open' });
        this.shadowRoot.innerHTML = `
      <style>
        :host {
          display: block;
        }
        
        * {
          margin: 0;
          padding: 0;
          box-sizing: border-box;
        }
        
        header {
          background-color: white;
          box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
          position: sticky;
          top: 0;
          z-index: 40;
        }
        
        .container {
          max-width: 1200px;
          margin: 0 auto;
          padding: 0 1rem;
        }
        
        .navbar {
          display: flex;
          justify-content: space-between;
          align-items: center;
          padding: 1rem 0;
        }
        
        .logo {
          display: flex;
          align-items: center;
          font-weight: 700;
          font-size: 1.5rem;
          color: #4f46e5;
          text-decoration: none;
        }
        
        .logo-icon {
          margin-left: 0.5rem;
          color: #7c3aed;
        }
        
        .nav-links {
          display: flex;
          list-style: none;
        }
        
        .nav-links li {
          margin-right: 2rem;
        }
        
        .nav-links a {
          text-decoration: none;
          color: #4b5563;
          font-weight: 500;
          transition: color 0.3s;
        }
        
        .nav-links a:hover {
          color: #4f46e5;
        }
        
        .auth-buttons {
          display: flex;
          align-items: center;
        }
        
        .login-btn {
          background: none;
          border: none;
          color: #4b5563;
          font-weight: 500;
          margin-left: 1rem;
          cursor: pointer;
          transition: color 0.3s;
          text-decoration: none;
          display: inline-flex;
          align-items: center;
        }
        
        .login-btn:hover {
          color: #4f46e5;
        }
        
        .signup-btn {
          background-color: #4f46e5;
          color: white;
          border: none;
          padding: 0.5rem 1.5rem;
          border-radius: 9999px;
          font-weight: 500;
          cursor: pointer;
          transition: background-color 0.3s;
          text-decoration: none;
          display: inline-flex;
          align-items: center;
        }
        
        .signup-btn:hover {
          background-color: #4338ca;
        }
        
        .mobile-menu-button {
          display: none;
          background: none;
          border: none;
          font-size: 1.5rem;
          cursor: pointer;
          color: #4b5563;
        }

        /* Mobile menu */
        .mobile-menu {
          display: none;
          position: absolute;
          top: 100%;
          left: 0;
          right: 0;
          background: white;
          box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
          z-index: 50;
          padding: 1rem;
          border-top: 1px solid #e5e7eb;
        }
        
        .mobile-menu.open {
          display: block;
        }
        
        .mobile-nav-links {
          list-style: none;
        }
        
        .mobile-nav-links li {
          margin-bottom: 1rem;
        }
        
        .mobile-nav-links a {
          text-decoration: none;
          color: #4b5563;
          font-weight: 500;
          display: block;
          padding: 0.5rem 0;
          border-bottom: 1px solid #f3f4f6;
        }
        
        .mobile-nav-links a:hover {
          color: #4f46e5;
        }
        
        .mobile-auth-buttons {
          margin-top: 1rem;
          display: flex;
          flex-direction: column;
          gap: 0.5rem;
        }
        
        @media (max-width: 768px) {
          .nav-links {
            display: none;
          }
          
          .auth-buttons {
            display: none;
          }
          
          .mobile-menu-button {
            display: block;
          }
        }
      </style>
      
      <header>
        <div class="container">
          <nav class="navbar">
            <a href="/" class="logo">
              <i data-feather="bar-chart-2" class="logo-icon"></i>
              <span>النظام المحاسبي</span>
            </a>
            
            <ul class="nav-links">
              <li><a href="/">الرئيسية</a></li>
              <li><a href="#features">المميزات</a></li>
              <li><a href="#accounts">الحسابات</a></li>
              <li><a href="#statistics">الإحصائيات</a></li>
              <li><a href="/about.html">عن النظام</a></li>
              <li><a href="/contact.html">اتصل بنا</a></li>
            </ul>
            
            <div class="auth-buttons">
              <a href="/login.html" class="login-btn">تسجيل الدخول</a>
              <a href="/signup.html" class="signup-btn">ابدأ مجاناً</a>
            </div>
            
            <button class="mobile-menu-button" id="mobile-menu-button">
              <i data-feather="menu"></i>
            </button>
          </nav>
        </div>
        <!-- Mobile menu (hidden by default) -->
        <div class="mobile-menu" id="mobile-menu">
          <ul class="mobile-nav-links">
            <li><a href="/">الرئيسية</a></li>
            <li><a href="#features">المميزات</a></li>
            <li><a href="#accounts">الحسابات</a></li>
            <li><a href="#statistics">الإحصائيات</a></li>
            <li><a href="/about.html">عن النظام</a></li>
            <li><a href="/contact.html">اتصل بنا</a></li>
          </ul>
          <div class="mobile-auth-buttons">
            <a href="/login.html" class="login-btn" style="justify-content: center;">تسجيل الدخول</a>
            <a href="/signup.html" class="signup-btn" style="justify-content: center;">ابدأ مجاناً</a>
          </div>
        </div>
      </header>
    `;
        // Initialize feather icons
        const initFeatherIcons = () => {
            if (typeof feather !== 'undefined') {
                this.shadowRoot.querySelectorAll('[data-feather]').forEach(icon => {
                    const iconName = icon.getAttribute('data-feather');
                    icon.outerHTML = `<i data-feather="${iconName}"></i>`;
                });
                feather.replace();
            }
        };

        // Check if feather is already loaded
        if (typeof feather !== 'undefined') {
            initFeatherIcons();
        } else {
            // Load feather icons script
            const featherScript = document.createElement('script');
            featherScript.src = 'https://unpkg.com/feather-icons';
            featherScript.onload = initFeatherIcons;
            this.shadowRoot.appendChild(featherScript);
        }

        // Mobile menu toggle
        const mobileMenuButton = this.shadowRoot.getElementById('mobile-menu-button');
        const mobileMenu = this.shadowRoot.getElementById('mobile-menu');
        if (mobileMenuButton && mobileMenu) {
            mobileMenuButton.addEventListener('click', () => {
                mobileMenu.classList.toggle('open');
                // Change icon
                const icon = mobileMenuButton.querySelector('i');
                if (mobileMenu.classList.contains('open')) {
                    icon.setAttribute('data-feather', 'x');
                } else {
                    icon.setAttribute('data-feather', 'menu');
                }
                if (typeof feather !== 'undefined') {
                    feather.replace();
                }
            });
        }
    }
}

customElements.define('custom-header', CustomHeader);