.iframe-container{
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* Ratio 16:9 ( 100%/16*9 = 56.25% ) */
}
.iframe-container > *{
    display: block;
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    margin: 0;
    padding: 0;
    height: 100%;
    width: 100%;
}
header.masthead1 {
    padding-top: 14rem;
    padding-bottom: 4rem;
    background: -webkit-gradient(linear, left top, left bottom, from(rgba(45, 92, 28, 0.8)), to(rgba(45, 92, 28, 0.8))), url("../img/slider1.jpg");
    background: linear-gradient(to bottom, rgba(45, 92, 28, 0.8) 0%, rgba(45, 92, 28, 0.8) 100%), url("../img/slider1.jpg");
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: scroll;
    background-size: cover;
}
header.mastheadok {
    padding-top: 14rem;
    padding-bottom: 4rem;
    background: -webkit-gradient(linear, left top, left bottom, from(rgba(86, 197, 60, 0.8)), to(rgba(86, 197, 60, 0.8))), url("../img/success.jpg");
    background: linear-gradient(to bottom, rgba(86, 197, 60, 0.8) 0%, rgba(86, 197, 60, 0.8) 100%), url("../img/success.jpg");
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: scroll;
    background-size: cover;
}
header.mastheadfail {
    padding-top: 14rem;
    padding-bottom: 4rem;
    background: -webkit-gradient(linear, left top, left bottom, from(rgba(173, 7, 0, 0.8)), to(rgba(173, 7, 0, 0.8))), url("../img/failed.jpg");
    background: linear-gradient(to bottom, rgba(173, 7, 0, 0.8) 0%, rgba(173, 7, 0, 0.8) 100%), url("../img/failed.jpg");
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: scroll;
    background-size: cover;
}