* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {

    background-image:url("../img/BackGround.jpg");
    background-repeat: no-repeat;
    background-position: center;
    background-attachment: fixed;
    background-size: cover;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: sans-serif;
  }

/*Get It*/

 #downloadButton {

    text-decoration: none;
    font-size: 1.5em;
    font-family: sans-serif;
    color:#000;
    background: #f73050;
    box-shadow: inset 0px 0px 37px 0px rgba(0,0,0,0.7);
    width: 200px;
    padding: 17px 0px;
    text-align:center;
    border-radius: 15px;
    position: absolute;
    top:0;
    left:0;
    border: none; 
    cursor: pointer; 
   
}


#countdown { 
            display: none; 
            font-size: 24px; 
            margin-top: 20px;
            color:#666
        } 





button span{
    position:relative;
    width:1.5em;
    visibility:visible;

}

button span:after{
    content:'\21D3';
    font-size: 1.5em;
    position:absolute;
    padding-left:10px;
    animation: down 1s linear
    infinite;
}

@keyframes down {

from{
    top:-10px;
    opacity: 0;

    }
to{
    top:10px;
    opacity: 1;
}   


 }

*/

/* Button */
button {
    border: none;
    background-color: transparent;
    margin-top:50px; 
    margin: 20px;
    cursor: pointer; 
    transition: transform 0.5s;
}

button:focus {
    outline: none;
}

button:hover i {
    color: rgb(102, 102, 102);
}

i {
    color: gray;
    font-size: 4em;
}


/* Book */
.book {
    width: 350px;
    height: 500px;
    position: relative;
    top: 135px;
    left: 30;
    background-repeat: no-repeat;
    background-attachment:fixed ;
    transition: transform 0.5s;
}

.paper {
    height: 100%;
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    perspective: 1500px;

   }

.front {
    backface-visibility: hidden;
    border-left: 7px solid  #410;
}


.front,
.back {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #7e5d38;
    padding: 0px;
    box-sizing: border-box;
    box-shadow: inset 0px 0px 37px 0px rgba(0,0,0,0.7);
    -webkit-clip-path: polygon(0 0, 100% 0, 100% 100%, 0% 100%);
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0% 100%);   
    transform-origin: left;
    transition: transform 0.5s;

  }




.text {
  font-family: 'Courier New', Courier, monospace;
  position: absolute;
  left: 0;
  top: 0;
  margin: 5px;
}

p {
  line-height: 24px;
}


.highlight  { 
  position: absolute;
  border-radius: 50%;
  box-shadow: 0px 0px 71px 101px transparent;
  animation: 1300s grow-highlight linear infinite;
}



@keyframes grow-highlight {
  0% {
    height: 0px;
    width: 0px;
    top: 50%;
    right: 50%;
    box-shadow: 0px 0px 71px 101px #dcaa71;
  }
  53% {
    box-shadow: 0px 0px 71px 101px #dcaa71;
  }
 
}





.front {
    z-index: 1;
}


.back {
    z-index: 0;
}

.front-content,
.back-content {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;


  }

.back-content {
    transform: rotateY(180deg)
}

/* Paper Flipped */
.flipped .front,
.flipped .back {
    transform: rotateY(-180deg)
}

/* Paper Z-index */
#p1 {
    z-index: 3;
}

#p2 {
    z-index: 2;
}

#p3 {
    z-index: 1;
}

/* Customization */

.book-title {
    font-size: 3em;
    margin-bottom: 40px;
}

.cover-img {
    width: 350px;
    height: 1000px;
    object-fit: cover;
    border-radius: 3px;
}

#b1 {
    padding: 20px;
    text-align: center;
    font-size: 1.2em;
    justify-content: space-around;
}

#b1 h2 {
    font-size: 2em;
    margin-top: 10px;
    margin-bottom: 20px;
}

#b1 p {
    margin-bottom: 20px;
}