body::before{
    display: block;
    content: '';
    height: 50px;
}

/*.iframe-introductions{*/
/*    background-image: url("../img/cover.PNG");*/
/*    background-size: cover;*/
/*    background-position: center;*/
/*}*/

/*.iframe-trial{*/
/*    background-image: url("../img/trial.PNG");*/
/*    background-size: cover;*/
/*    background-position: center;*/
/*}*/

.top{
    position:fixed;
    right:20px;
    bottom:18%;
    display:block;
}

.popover-body{
    padding: 0;
}