.overlay_youtube {
    height: 100%;
    width: 100%;
    display: none;
    position: fixed;
    z-index: 1;
    top: 0;
    left: 0;
    background-color: rgb(0,0,0);
    background-color: rgba(0,0,0, 0.9);
}

.overlay-content_youtube {
    position: relative;
    top: 25%;
    width: 100%;
    text-align: center;
    margin-top: 30px;
}

.overlay_youtube a {
    padding: 8px;
    text-decoration: none;
    font-size: 36px;
    color: #818181;
    display: block;
    transition: 0.3s;
}

    .overlay_youtube a:hover, .overlay_youtube a:focus {
        color: #f1f1f1;
    }

.overlay_youtube .closebtn {
    position: absolute;
    top: 20px;
    right: 45px;
    font-size: 60px;
}

@media screen and (max-height: 450px) {
    .overlay_youtube a {
        font-size: 20px
    }

    .overlay_youtube .closebtn {
        font-size: 40px;
        top: 15px;
        right: 35px;
    }
}

div.item_watch_download {
    vertical-align: top;
    display: inline-block;
    text-align: center;
    width: 100px;
}

.caption_watch_download {
    display: block;
    color: #ffffff;
}

.num23 {
    font-size: 30px;
    margin: 20px 0;
    color: #ffffff;
    opacity: 0;
    vertical-align: middle;
}

.num24 {
    font-size: 14px;
    margin: 20px 0;
    color: #ffffff;
    vertical-align: middle;
}