#cod-order-modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 20px;
    border: 2px solid #333;
    z-index: 9999;
}
#cod-order-modal form input, #cod-order-modal form button {
    display: block;
    margin: 10px 0;
    width: 100%;
}