.zeppelin {
    width: 100%;
    z-index: 0;
}

/**
   * Clouds
   */
.clouds {
    position: relative;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    transform: translateZ(0);
}

.cloud {
    position: absolute;
    top: 20%;
    width: 300px;
    right: 0;
    opacity: 1;
}

.cloud.front {
    z-index: 1;
}

.cloud.distant {
    z-index: -1;
}

.cloud.background {
    z-index: 0;
}

/*Cloud Sizing*/
.cloud.smaller {
    margin-right: 400px;
    width: 100px;
    margin-top: 50px;
}

.cloud.small {
    margin-right: 200px;
    width: 150px;
}

.cloud.big {
    width: 500px;
    margin-top: 50px;
    margin-right: 150px;
}

.cloud.massive {
    width: 600px;
    margin-top: 20px;
    margin-right: 0px;
}


/*Cloud: Animation*/
.cloud {
    -webkit-animation-name: cloud-movement;
    -webkit-animation-timing-function: linear;
    -webkit-animation-direction: reverse;
    -webkit-animation-iteration-count: infinite;
    -webkit-animation-duration: 8s;

    -moz-animation-name: cloud-movement;
    -moz-animation-timing-function: linear;
    -moz-animation-direction: reverse;
    -moz-animation-iteration-count: infinite;
    -moz-animation-duration: 8s;

    animation-name: cloud-movement;
    animation-timing-function: linear;
    animation-direction: reverse;
    animation-iteration-count: infinite;
    animation-duration: 8s;
}

.slow {
    -webkit-animation-duration: 9.2s;
    -moz-animation-duration: 9.2s;
    animation-duration: 9.2s;
}

.slower {
    -webkit-animation-duration: 11.2s;
    -moz-animation-duration: 11.2s;
    animation-duration: 11.2s;
}

.slowest {
    -webkit-animation-duration: 13.5s;
    -moz-animation-duration: 13.5s;
    animation-duration: 13.5s;
}

.super-slow {
    -webkit-animation-duration: 20.5s;
    -moz-animation-duration: 20.5s;
    animation-duration: 20.5s;
}

@-webkit-keyframes cloud-movement {
    0% {
        opacity: 0.1;
        -webkit-transform: translateX(300px);
        -moz-transform: translateX(300px);
        transform: translateX(300px);
    }

    10% {

        opacity: 0.7;
    }

    90% {
        opacity: 0;
    }

    100% {
        opacity: 0;
        -webkit-transform: translateX(-1000px);
        -moz-transform: translateX(-1000px);
        transform: translateX(-1000px);
    }
}