body {
      background: linear-gradient(135deg, #007bff, #6610f2);
      height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .login-card {
      max-width: 400px;
      width: 100%;
      border-radius: 20px;
      box-shadow: 0 5px 20px rgba(0,0,0,0.2);
    }
    .login-card .card-body {
      padding: 2rem;
    }
    .form-control {
      border-radius: 10px;
    }
    .btn-login {
      border-radius: 10px;
    }