body {
      background-color: #1c3a66;
      font-family: 'Roboto', sans-serif;
    }

    .navbar {
      background-color: #3399ff;
    }

    .navbar-brand {
      font-weight: bold;
      display: flex;
      align-items: center;
    }

    .navbar-brand img {
      height: 40px;
      margin-right: 10px;
    }

    .auth-container {
      max-width: 500px;
      margin: 60px auto;
      background: #fff;
      padding: 30px;
      border-radius: 8px;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    }

    .auth-header {
      text-align: center;
      margin-bottom: 20px;
    }

    .nav-tabs .nav-link {
      color: #495057;
      font-weight: 500;
    }

    .nav-tabs .nav-link.active {
      background-color: #007bff;
      color: #fff;
      border: none;
      border-radius: 4px 4px 0 0;
    }

    .tab-content {
      padding-top: 20px;
    }

    .btn-primary {
      background-color: #007bff;
      border: none;
    }

    .btn-primary:hover {
      background-color: #0056b3;
    }

    .form-control {
      border-radius: 4px;
    }

    @media (max-width: 576px) {
      .auth-container {
        margin: 30px 20px;
      }
    }