body {
    background: url("../images/bg.jpg");
}

.container-iframe {
    position: relative;
    overflow: hidden;
    width: 100%;
    padding-top: 56.25%;
    /* 16:9 Aspect Ratio (divide 9 by 16 = 0.5625) */
}


/* Then style the iframe to fit in the container div with full height and width */

.responsive-iframe {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    width: 100%;
    height: 100%;
}

.img-fix {
    width: 100%;
}


/* For desktop: */

@media only screen and (min-width: 768px) {
    .img-fix {
        max-width: 1024px;
    }
}