body { background: linear-gradient(135deg, #f2f6f9, #e0ecf5); }
    .register-box {
      animation: slideIn 0.6s ease;
      box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    }
    @keyframes slideIn {
      from { transform: translateY(30px); opacity: 0; }
      to { transform: translateY(0); opacity: 1; }
    }