body {
            background: linear-gradient(135deg, #009999, #006666);
            color: white;
            font-family: 'Poppins', sans-serif;
        }
        .card {
            border-radius: 12px;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
        }
        .form-label {
            font-weight: bold;
        }
        .input-group-text {
            background-color: #f8f9fa;
            border: none;
        }
        .input-group .form-control {
            border-left: none;
        }
        .btn-primary {
            background: #ffcc00;
            border: none;
        }
        .btn-primary:hover {
            background: #ff9900;
        }
        .password-strength {
            font-size: 0.9rem;
        }
        .form-container {
            animation: fadeIn 1.5s ease-in-out;
        }
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }