laybuy-gateway-for-woocommerce/assets/css/laybuy-iframe.css

.laybuy-content-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}
.laybuy-content-container:before {
    content: "";
    display: block;
    padding-top: 66.6%;
}

.laybuy-content-container iframe {
    border: 0;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 100%;
    max-width: calc(740px + 58px);
    margin-left: auto;
    margin-right: auto;
}