body {
            font-family: Arial, Helvetica, sans-serif;
            background-color: #f4f4f4;
            display: flex;
            justify-content: center;
            padding: 20px;
        }

        .container {
            display: flex;
            gap: 40px;
            background-color: white;
            padding: 40px;
            border-radius: 8px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.1);
            max-width: 1500px;
            width: 100%;
        }

        .left-side {
            flex: 1;
            padding-right: 20px;
            border-right: 1px solid #ddd;
        }

        .right-side {
            flex: 1;
            padding-left: 20px;
        }

        label {
            display: block;
            margin-bottom: 5px;
            font-weight: bold;
            color: #333;
            font-size: 14px;
        }

        input, select {
            width: 100%;
            padding: 10px;
            margin-bottom: 15px;
            border: 1px solid #ccc;
            border-radius: 4px;
            box-sizing: border-box; 
        }

        .form-row {
            display: flex;
            gap: 15px;
        }
        
        .form-group {
            flex: 1;
        }
		
		        h2 {
            padding-bottom: 10px;
            margin-top: 0;
            color: #397bbd;
        }

        h3 {
            border-bottom: 2px solid #397bbd;
            padding-bottom: 10px;
            margin-top: 0;
            color: #397bbd;
        }

        .button-group {
            display: flex;
            gap: 15px;
            margin-bottom: 15px;
        }

        .btn {
            flex: 1;
            padding: 15px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 16px;
            font-weight: bold;
            transition: opacity 0.3s;
        }

        .btn:hover {
            opacity: 0.9;
        }

        .btn-card {
            background-color: #397bbd;
            color: white;
        }

        .btn-apple {
            background-color: black;
            color: white;
        }

#hidden-payment-div {
            display: none;
            margin-top: 20px;
            padding: 20px;
            background-color: #e9f5ff;
            border: 1px dashed #397bbd;
            border-radius: 4px;
            text-align: center;
            height: 640px;
            box-sizing: border-box;
        }

        @media (max-width: 768px) {
            .container {
                flex-direction: column; 
            }
            .left-side {
                border-right: none;
                border-bottom: 1px solid #ddd;
                padding-right: 0;
                padding-bottom: 20px;
                margin-bottom: 20px;
            }
            .right-side {
                padding-left: 0;
            }
            .form-row {
                flex-direction: column;
                gap: 0;
            }
            .button-group {
                flex-direction: column;
                gap: 10px;
            }
        }