* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            background: linear-gradient(135deg, #E6F2FF 0%, #F0F8FF 100%);
           
        }

        .payment-container {
            max-width: 1000px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .payment-header {
            text-align: center;
            margin-bottom: 40px;
            position: relative;
        }

        .back-btn {
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            padding: 8px 16px;
            font-size: 0.9rem;
            border-radius: 8px;
            transition: all 0.3s ease;
        }

        .back-btn:hover {
            transform: translateY(-50%) translateX(-2px);
            box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
        }

        .payment-header h1 {
            color: #0A1A2A;
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .payment-header p {
            color: #4A5568;
            font-size: 1.1rem;
        }

        .security-badge {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: #ffffff;
            padding: 12px 24px;
            border-radius: 50px;
            box-shadow: 0 4px 15px rgba(0, 123, 255, 0.2);
            margin-top: 20px;
        }

        .security-badge i {
            color: #28a745;
            font-size: 1.2rem;
        }

        .security-badge span {
            color: #28a745;
            font-weight: 600;
            font-size: 0.95rem;
        }

        .payment-form-card {
            background: #ffffff;
            border-radius: 20px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
            padding: 40px;
            margin-bottom: 30px;
        }

        .section-title {
            color: #0A1A2A;
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 25px;
            padding-bottom: 15px;
            border-bottom: 2px solid #E6F2FF;
        }

        .form-label {
            color: #2D3748;
            font-weight: 500;
            font-size: 0.95rem;
            margin-bottom: 8px;
        }

        .form-control,
        .form-select {
            border: 2px solid #E2E8F0;
            border-radius: 12px;
            padding: 12px 16px;
            font-size: 1rem;
            transition: all 0.3s ease;
            background-color: #F8FAFC;
        }

        .form-control:focus,
        .form-select:focus {
            border-color: #007BFF;
            box-shadow: 0 0 0 4px rgba(0, 123, 255, 0.1);
            background-color: #ffffff;
            outline: none;
        }

        .payment-methods {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 15px;
            margin-bottom: 30px;
        }

        .payment-method {
            position: relative;
        }

        .payment-method input[type="radio"] {
            display: none;
        }

        .payment-method label {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 20px;
            border: 3px solid #E2E8F0;
            border-radius: 15px;
            cursor: pointer;
            transition: all 0.3s ease;
            background: #F8FAFC;
            min-height: 120px;
        }

        .payment-method label:hover {
            border-color: #007BFF;
            background: #ffffff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 123, 255, 0.15);
        }

        .payment-method input[type="radio"]:checked + label {
            border-color: #007BFF;
            background: linear-gradient(135deg, #E6F2FF 0%, #ffffff 100%);
            box-shadow: 0 8px 25px rgba(0, 123, 255, 0.2);
        }

        .payment-method-icon {
            font-size: 2rem;
            margin-bottom: 10px;
            color: #007BFF;
        }

        .payment-method-name {
            font-weight: 600;
            color: #2D3748;
            font-size: 0.95rem;
            text-align: center;
        }

        .plan-summary {
            background: linear-gradient(135deg, #007BFF 0%, #0056b3 100%);
            color: white;
            padding: 25px;
            border-radius: 15px;
            margin-bottom: 25px;
        }

        .plan-summary h4 {
            font-size: 1.2rem;
            margin-bottom: 15px;
            font-weight: 600;
        }

        .plan-detail {
            display: flex;
            justify-content: space-between;
            margin-bottom: 10px;
            padding-bottom: 10px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.2);
        }

        .plan-detail:last-child {
            border-bottom: none;
            font-size: 1.3rem;
            font-weight: 700;
            padding-top: 10px;
            border-top: 2px solid rgba(255, 255, 255, 0.3);
        }

        .btn-payment {
            background: linear-gradient(135deg, #D62828 0%, #a81e1e 100%);
            color: white;
            border: none;
            padding: 18px 40px;
            font-size: 1.1rem;
            font-weight: 600;
            border-radius: 12px;
            width: 100%;
            margin-top: 20px;
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .btn-payment:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(214, 40, 40, 0.4);
            background: linear-gradient(135deg, #b81f1f 0%, #8a1717 100%);
        }

        .payment-cards-img {
            text-align: center;
            margin-top: 20px;
        }

        .payment-cards-logos {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 15px;
            flex-wrap: wrap;
            margin-top: 15px;
        }

        .payment-cards-logos i {
            font-size: 2.5rem;
            opacity: 0.7;
        }

        .fa-cc-visa { color: #1A1F71; }
        .fa-cc-mastercard { color: #EB001B; }
        .fa-cc-paypal { color: #003087; }
        .fa-credit-card { color: #2D3748; }

        /* Success Modal Styling */
        .success-modal-content {
            text-align: center;
            padding: 40px 20px;
        }

        .success-icon {
            font-size: 5rem;
            color: #28a745;
            margin-bottom: 20px;
            animation: scaleIn 0.5s ease-out;
        }

        @keyframes scaleIn {
            from {
                transform: scale(0);
            }
            to {
                transform: scale(1);
            }
        }

        .success-title {
            color: #0A1A2A;
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 15px;
        }

        .success-message {
            color: #4A5568;
            font-size: 1.1rem;
            margin-bottom: 30px;
        }

        .member-id-box {
            background: #E6F2FF;
            padding: 20px;
            border-radius: 12px;
            margin-bottom: 25px;
            border-left: 4px solid #007BFF;
        }

        .member-id-box strong {
            color: #007BFF;
            font-size: 1.3rem;
        }

        .form-group {
            margin-bottom: 20px;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .payment-form-card {
                padding: 25px;
            }
            .payment-header h1 {
                font-size: 2rem;
            }

            .payment-methods {
                grid-template-columns: 1fr;
            }
        }
        /* Loading Spinner */
        .spinner-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            z-index: 9999;
            justify-content: center;
            align-items: center;
        }

        .spinner-overlay.active {
            display: flex;
        }

        .spinner-content {
            text-align: center;
            color: white;
        }

        .spinner-border {
            width: 4rem;
            height: 4rem;
            border-width: 0.4rem;
        }