body{
    margin:0;
    background-color: #FFF;
}
*{
    box-sizing: border-box;
}
.book-section{
    height: 100vh;
    width: 100%;
    padding: 40px 0;
    text-align: center;
}
.videoInsert {
    width: 100%;
    z-index: 1 !important;

}

.videoDiv {
    position: sticky;
    top: 14%;
}

.playbtn{
    color: #000;
    text-align: center;
    cursor: pointer;
}


.book-section > .container{
    height: 90%;
    width: 90%;
    position: relative;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2%;
    margin-bottom: 30px;
    perspective: 1200px;
}
.container > .right{
    position: absolute;
    height: 90%;
    width: 50%;
    transition: 0.7s ease-in-out;
    transform-style: preserve-3d;
}
.book-section > .container > .right{
    right:0;
    transform-origin: left;
    border-radius: 10px 0 0 10px;
}
.right > figure.front, .right > figure.back{
    margin: 0;
    height: 100%;
    width: 100%;
    position: absolute;
    left:0;
    top:0;
    background-size: 200%;
    background-repeat: no-repeat;
    backface-visibility: hidden;
    background-color: white;
    overflow: hidden;
}
.right > figure.front{
    background-position: right;
    border-radius: 0 10px 10px 0;
    box-shadow: 2px 2px 15px -2px rgba(0,0,0,0.2);
}
.right > figure.back{
    background-position: left;
    border-radius: 10px 0 0 10px;
    box-shadow: -2px 2px 15px -2px rgba(0,0,0,0.2);
    transform: rotateY(180deg);
}
.flip{
    transform: rotateY(-180deg);
}
.flip::before{
    content: "";
    position: absolute;
    top:0;
    left:0;
    z-index: 10;
    width: 100%;
    height: 100%;
    border-radius: 0 10px 10px 0;
    background-color: rgba(0,0,0,0.009);
}
.book-section > button{
    /*border: 2px solid #ef9f00;*/
    /*background-color: transparent;*/
    color: #000;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    margin: 10px;
    transition: 0.3s ease-in-out;
}
.book-section > button:focus, .book-section > button:active{
    outline: none;
}
.book-section > p{
    color: rgba(0,0,0,0.7);
    font-family: calibri;
    font-size: 24px;
}
.book-section > p > a{
    text-decoration: none;
    color: #ef9f00;
}
.book-section > button:hover{
    background-color: #000;
    color: #fff;
}
.front#cover, .back#back-cover{
    background-color: #FFF;
    font-family: calibri;
    text-align: left;
    padding: 0 30px;
}
.front#cover h1{
    color: #fff;
}
.front#cover p{
    color: rgba(0,0,0,0.8);
    font-size: 14px;
}