body {
    color: #505963;
    background: #eee;
}
.case {
    max-width: 710px;
    width: 100%;
    margin: 0 auto;
}
.text-small {
    font-size: 12px;
}
.payment-card .card-header {
    position: relative;
}
.payment-card .card-header .spinner-border {
    position: absolute;
    right: 15px;
    top: 15px;
}