svg {
    max-width: 100%;
    height: auto;
    display: block;
}

/**
 * Paper Plane
 */

/*Paper Plane: Container*/

.plane-container {
    width: 200px;
    margin: 0px auto;
    z-index: 3;
}

/*Paper Plane: Image*/

.plane {
    width: 100%;
    height: 60px;
}

/*Paper Plane: Animation*/

.plane-container {
    -webkit-animation: paper-plane-scoping 2s alternate infinite;
    -moz-animation: paper-plane-scoping 2s alternate infinite;
    animation: paper-plane-scoping 2s alternate infinite;
    -webkit-animation-timing-function: linear;
    -moz-animation-timing-function: linear;
    animation-timing-function: linear;
}

@-webkit-keyframes paper-plane-scoping {
    0% {
        -webkit-transform: translateY(0px);
        -moz-transform: translateY(0px);
        transform: translateY(0px);
    }
    100% {
        -webkit-transform: translateY(100px);
        -moz-transform: translateY(100px);
        transform: translateY(100px);
    }
}

.plane {
    -webkit-animation-timing-function: ease-in-out;
    -moz-animation-timing-function: ease-in-out;
    animation-timing-function: ease-in-out;
    -webkit-animation: paper-plane-soaring 4s forwards infinite;
    -moz-animation: paper-plane-soaring 4s forwards infinite;
    animation: paper-plane-soaring 4s forwards infinite;
}

@-webkit-keyframes paper-plane-soaring {
    0% {
        -webkit-transform: rotate(0deg);
        -moz-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    40% {
        -webkit-transform: rotate(15deg);
        -moz-transform: rotate(15deg);
        transform: rotate(15deg);
    }
    50% {
        -webkit-transform: rotate(15deg);
        -moz-transform: rotate(15deg);
        transform: rotate(15deg);
    }
    60% {
        -webkit-transform: rotate(-10deg);
        -moz-transform: rotate(-10deg);
        transform: rotate(-10deg);
    }
    70% {
        -webkit-transform: rotate(-10deg);
        -moz-transform: rotate(-10deg);
        transform: rotate(-10deg);
    }
    100% {
        -webkit-transform: rotate(0deg);
        -moz-transform: rotate(0deg);
        transform: rotate(0deg);
    }
}

/**
 * Clouds
 */

.clouds {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    transform: translateZ(0);
}

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

.cloud.front {
    z-index: 9;
}

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

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

/*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: forwards;
    -webkit-animation-iteration-count: infinite;
    -webkit-animation-duration: 8s;
    -moz-animation-name: cloud-movement;
    -moz-animation-timing-function: linear;
    -moz-animation-direction: forwards;
    -moz-animation-iteration-count: infinite;
    -moz-animation-duration: 8s;
    animation-name: cloud-movement;
    animation-timing-function: linear;
    animation-direction: forwards;
    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);
    }
}