/div--> 
 <div class="text-center position-relative d-flex align-self-center mx-auto">
    <div class="card card-size border my-2 mx-auto" style="max-width: 350px; border-radius: 15px; box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);">
        <div class="card-body p-0">
            <div class="login-signin">
                <div class="mb-0" style="text-align: left; color: white; background: #424242; padding: 2.25rem 2.25rem 1rem 2.25rem; border-bottom: 1px solid #f2f4f9; border-top-left-radius: 15px; border-top-right-radius: 15px;">
                    <h3>Secure Payment</h3>
                    <p class="opacity-75 font-weight-bold" style="opacity:75%; font-size: 12px;">Scan to pay ₹<span class="rupee_symbol" style="margin: 0"><?php echo $txnAmount; ?></span></p>
                </div>

                <!-- Success message hidden initially -->
                <div class="d-none">
    <div class="d-flex flex-row fade show mb-5" role="alert" style="margin: 2rem 2rem 0 2rem; background-color: #4CAF50; color: white; border-radius: 10px; padding: 1rem;">
        <div class="alert-icon" style="font-size: 1.5rem; margin-right: 10px;">🚀</div>
        <div class="alert-text" style="font-size: 1.2rem; font-weight: bold;">Your transaction was successfully completed</div>
    </div>
    <button class="btn btn-xs btn-danger font-weight-bold" id="goback" style="margin-bottom: 2.25rem; background-color: #f44336; border-radius: 5px; padding: 10px 20px; color: white; font-size: 1rem; box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2); transition: background-color 0.3s;">
        Go Back
    </button>
</div>

<div class="d-flex flex-column flex-center p-3" style="margin: 0 auto;">
    <div class="mt-2 mx-2 d-flex justify-content-center" id="qrcode">
        <img src="../assets/img/loading.cc387905.gif" alt="QR Code" style="max-width: 200px; border-radius: 10px; box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2); border: 3px solid #f44336;">
    </div>
</div>