.bookFileClose{
    width: 100%;
    height: auto;
    overflow: hidden;
    transition: 0.5s;
    padding-bottom: 20px;
    transform: translateY(-100%);

    position: absolute;
    top: 0;
}
.bookFileOpen{
    width: 100%;
    height: auto;
    overflow: hidden;
    transition: 0.5s;
    padding-bottom: 20px;
    transform: translateY(0%);
    position: absolute;
    top: 0;
}
.bookFileContainer{
    width: 100%;
    background-color: rgba(0, 0, 0, 0.75);
    position: relative;
    overflow: hidden;
    margin-top: 50px;
}