.fs-background {
overflow: hidden;
position: relative;       }
.fs-background,
.fs-background-container,
.fs-background-media {
-webkit-transition: none;
transition: none;
}
.fs-background-container {
width: 100%;
height: 100%;
position: absolute;
top: 0;
z-index: 0;
overflow: hidden;
}
.fs-background-media {
position: absolute;
top: 0;
bottom: 0;
opacity: 0;
}
.fs-background-media.fs-background-animated {
-webkit-transition: opacity 0.5s linear;
transition: opacity 0.5s linear;
}
.fs-background-media img,
.fs-background-media video,
.fs-background-media iframe {
width: 100%;
height: 100%;
display: block;
-webkit-user-drag: none;
}
.fs-background-media.fs-background-native,
.fs-background-media.fs-background-fixed {
width: 100%;
height: 100%;
}
.fs-background-media.fs-background-native img,
.fs-background-media.fs-background-fixed img {
display: none;
}
.fs-background-media.fs-background-native {
background-position: center;
background-size: cover;
}
.fs-background-media.fs-background-fixed {
background-position: center;
background-attachment: fixed;
}
.fs-background-embed.fs-background-ready:after {
width: 100%;
height: 100%;
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
z-index: 1;
content: '';
}
.fs-background-embed.fs-background-ready iframe {
z-index: 0;
}