.container {
    background-color: #f2f2f2;
    padding: 5px 20px 15px 20px;
    border: 1px solid lightgrey;
    border-radius: 10px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

iframe[id^="secure-payment-field"] {
    min-height: 66px !important;
}