html { 
    background: url(images/background.jpg) no-repeat center center fixed; 
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    overflow: hidden;
}

.container {
    position: absolute;
    text-align: center;
    text-transform: uppercase;
    top: 50%;
    left: 50%;
    margin: 0;
    padding: 0;
    transform: translate(-50%, -50%);
    color: white;
    font-family: 'Roboto', 'Verdana', sans-serif;

    -webkit-animation: fadein 2s; /* Safari, Chrome and Opera > 12.1 */
    -moz-animation: fadein 2s; /* Firefox < 16 */
     -ms-animation: fadein 2s; /* Internet Explorer */
      -o-animation: fadein 2s; /* Opera < 12.1 */
         animation: fadein 2s;
}

.credits {
    position: absolute;
    text-align: left;
    top: 100%;
    left: 0;
    margin: 0;
    padding: 0;
    transform: translate(0, -80%);
    color: #aaa5a8;
    font-size: 1.5vw;
}

h1 {
    font-size: 6vw;
    margin: 0 0 0.5vw 0;
}

h2 {
    font-size: 2vw;
    margin: 0;
}


    @keyframes fadein {
        from { opacity: 0; top: 30%;}
        to   { opacity: 1; top: 50%;}
    }
    
    /* Firefox < 16 */
    @-moz-keyframes fadein {
        from { opacity: 0; top: 30%;}
        to   { opacity: 1; top: 50%;}
    }
    
    /* Safari, Chrome and Opera > 12.1 */
    @-webkit-keyframes fadein {
        from { opacity: 0; top: 30%;}
        to   { opacity: 1; top: 50%;}
    }
    
    /* Internet Explorer */
    @-ms-keyframes fadein {
        from { opacity: 0; top: 30%;}
        to   { opacity: 1; top: 50%;}
    }
    
    /* Opera < 12.1 */
    @-o-keyframes fadein {
        from { opacity: 0; top: 30%;}
        to   { opacity: 1; top: 50%;}
    }