.sky {
    background: #007fd5;
    position: relative;
    overflow-x: hidden;
    -webkit-animation: sky_background 50s ease-out infinite;
    -moz-animation: sky_background 50s ease-out infinite;
    -o-animation: sky_background 50s ease-out infinite;
    animation: sky_background 50s ease-out infinite;
    -webkit-transform: translate3d(0, 0, 0);
    -ms-transform: translate3d(0, 0, 0);
    -o-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
}

.sky .clouds_one {
    background: url("../images/cloud_one.png") no-repeat;
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3000%;
    -webkit-animation: cloud_one 50s linear infinite;
    -moz-animation: cloud_one 50s linear infinite;
    -o-animation: cloud_one 50s linear infinite;
    animation: cloud_one 50s linear infinite;
    -webkit-transform: translate3d(0, 0, 0);
    -ms-transform: translate3d(0, 0, 0);
    -o-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
}

.sky .clouds_two {
    background: url("../images/cloud_two.png");
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3000%;
    -webkit-animation: cloud_two 75s linear infinite;
    -moz-animation: cloud_two 75s linear infinite;
    -o-animation: cloud_two 75s linear infinite;
    animation: cloud_two 75s linear infinite;
    -webkit-transform: translate3d(0, 0, 0);
    -ms-transform: translate3d(0, 0, 0);
    -o-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
}

.sky .clouds_three {
    background: url("../images/cloud_three.png");
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3000%;
    -webkit-animation: cloud_three 100s linear infinite;
    -moz-animation: cloud_three 100s linear infinite;
    -o-animation: cloud_three 100s linear infinite;
    animation: cloud_three 100s linear infinite;
    -webkit-transform: translate3d(0, 0, 0);
    -ms-transform: translate3d(0, 0, 0);
    -o-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
}

@-webkit-keyframes sky_background {
    0% {
        background: #007fd5;
        color: #007fd5
    }
    50% {
        background: #000;
        color: #a3d9ff
    }
    100% {
        background: #007fd5;
        color: #007fd5
    }
}
@-moz-keyframes sky_background {
    0% {
        background: #007fd5;
        color: #007fd5
    }
    50% {
        background: #000;
        color: #a3d9ff
    }
    100% {
        background: #007fd5;
        color: #007fd5
    }
}
@keyframes sky_background {
    0% {
        background: #007fd5;
        color: #007fd5
    }
    50% {
        background: #000;
        color: #a3d9ff
    }
    100% {
        background: #007fd5;
        color: #007fd5
    }
}

@-webkit-keyframes cloud_one {
    0% {
        left: 0
    }
    100% {
        left: -200%
    }
}
@-moz-keyframes cloud_one {
    0% {
        left: 0
    }
    100% {
        left: -200%
    }
}
@keyframes cloud_one {
    0% {
        left: 0
    }
    100% {
        left: -200%
    }
}

@-webkit-keyframes cloud_two {
    0% {
        left: 0
    }
    100% {
        left: -200%
    }
}
@-moz-keyframes cloud_two {
    0% {
        left: 0
    }
    100% {
        left: -200%
    }
}
@keyframes cloud_two {
    0% {
        left: 0
    }
    100% {
        left: -200%
    }
}

@-webkit-keyframes cloud_three {
    0% {
        left: 0
    }
    100% {
        left: -200%
    }
}
@-moz-keyframes cloud_three {
    0% {
        left: 0
    }
    100% {
        left: -200%
    }
}
@keyframes cloud_three {
    0% {
        left: 0
    }
    100% {
        left: -200%
    }
}


img {
    width: 100%;
    height: 400px;
    opacity: 0.7;
}
.col-md-4 {
    margin-top: 20px;
    margin-bottom: 20px;
}
.col-md-4 div{
    border: 2px #f2f2f2 solid;
    padding: 10px;
    box-shadow: 5px 5px 5px #dcdcdc;
}
.col-md-4 div a{
    opacity: 0.5;
}