.bg-video{position: relative;left:0;right:0;top:0;bottom:0;width:100%;z-index:1;}
.bottom-button {
    position: absolute;
    z-index: 2;
    bottom: 20px;
    display: inline-block;
    right: 0%;
    height: 165px;
    width: 54%;
}
.pdf-link {
    position: absolute;
    left: 14px;
    top: 0;
    width: 41%;
    z-index: 3;
    height: 66%;
}
.ppt-link {
    position: absolute;
    right: 50px;
    top: 0;
    width: 40%;
    z-index: 3;
    height: 66%;
}
.back-btn{
    position:absolute;
    right:5%;
    top: 15%;
}
.modal-xxl {
    max-width: 100%;
}
@media (max-width: 992px) {
    .back-btn{ top: 5%; }
}