header {
      background-color: rgba(255, 255, 255, 0.95);
      box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
      position: fixed;
      width: 100%;
      top: 0;
      z-index: 1000;
  }

  .navbar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 0;
  }

  .logo {
      display: flex;
      align-items: center;
      font-size: 24px;
      font-weight: 700;
      color: #2563eb;
  }

  .nav-links {
      display: flex;
      list-style: none;
  }

  .nav-links li {
      margin-left: 30px;
  }

  .nav-links a {
      text-decoration: none;
      color: #333;
      font-weight: 500;
      transition: color 0.3s;
  }

  .nav-links a:hover {
      color: #2563eb;
  }

  .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: #333;
      cursor: pointer;
  }

  .lang-switcher {
      display: flex;
      gap: 8px;
      margin-left: 20px;
  }

  .lang-btn {
      background: none;
      border: 1px solid #2563eb;
      color: #2563eb;
      padding: 5px 12px;
      border-radius: 20px;
      font-size: 14px;
      cursor: pointer;
      transition: all 0.2s;
  }

  .lang-btn.active {
      background-color: #2563eb;
      color: white;
  }