.titolo::after {
    content: "LIBREOFFICE";
}

.pagine::after {
    content: "17";}

body {
    background: #000000;
}

.diapo {
    position: relative;
    margin-left: auto;
    margin-right: auto;
    width: 1200px;
    height: 675px;
    /*width: 1920px;*/
    /* height: 1080px;*/
    /*border: 1px solid #333;*/
    }

.diapo_img {
   display: block;
   width: 100%;
}

.video {
   position: absolute;
    width: 800px;
    height: 450px;
    /*width: 1280px;*/
    /*height: 720px;*/
    left: 200px;
    top: 70px;
    /*left: 320px;*/
    /*top: 111px;*/
}

.piede {
    margin-top: 10px;
    width: 100%;
}

.navigazione {
    margin-left: auto;
    margin-right: auto;
    width: 200px;
    display: block;
    overflow:hidden;
    /*border: 1px solid #333;*/
}
.pagine {
    font-family: "Trebuchet MS";
    font-size: 30px;
    color: #FFFFFF;
    width: 100px;
    text-align: center;
    float: left;
    /*border: 1px solid #333;*/
}


.nav{
    float: left;
}

.titolo {
    font-family: "Trebuchet MS";
    color: #FFFFFF;
    font-size: 30px;
    text-align: center;
}