body{
    margin: 0;
    padding: 0;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family:Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
    background: linear-gradient(90deg, #fff 50%, #300e3a 50%);
}
input{
    display: none;
}
label{
    width: 100%;
    height: 100%;
}
img{
    
    width: 100%;
    height: 100%;
}
.book{
    display: flex;
}
.flip-book{
    width: 100%;
    height: 100vh;
    position: relative;
    perspective: 1500px;
}
.flip{
    width: 70vh;
    height: 100vh;
    position: absolute;
    top: 0;
    left: 0;
    transform-origin: left;
    transform-style: preserve-3d;
    transition: 1.5s;
    color: #000;
    /*box-shadow: 4px 0px 40px black;*/
}
.front{
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 0;
    background-color: #fff;
    box-sizing: border-box;
    padding: 0 0px;
    box-shadow: inset 20px 0 50px rgba(0,0,0,0.5);
}
.back{
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    transform: rotateY(180deg);
    backface-visibility: hidden;
    background-color: #000;
}
.back-btn{
    position: absolute;
    bottom: 0vh;
    right: 0vh;
    cursor: pointer;
    font-size: 0vh;
}
.next-btn{
    position: absolute;
    bottom: 0vh;
    right: 0vh;
    cursor: pointer;
    font-size: 0vh;
}
#p1{
    z-index: 20;
}
#p2{
    z-index: 19;
}
#p3{
    z-index: 18;
}
#p4{
    z-index: 17;
}
#p5{
    z-index: 16;
}
#p6{
    z-index: 15;
}
#p7{
    z-index: 14;
}
#p8{
    z-index: 13;
}
#p9{
    z-index: 12;
}
#p10{
    z-index: 11;
}
#p11{
    z-index: 10;
}
#p12{
    z-index: 9;
}
#p13{
    z-index: 8;
}
#p14{
    z-index: 7;
}
#p15{
    z-index: 6;
}
#p16{
    z-index: 5;
}
#p17{
    z-index: 4;
}
#p18{
    z-index: 3;
}
#p19{
    z-index: 2;
}
#p20{
    z-index: 1;
}

#c1:checked ~ .flip-book #p1{
    transform: rotateY(-180deg);
    z-index: 1;
}
#c2:checked ~ .flip-book #p2{
    transform: rotateY(-180deg);
    z-index: 2;
}
#c3:checked ~ .flip-book #p3{
    transform: rotateY(-180deg);
    z-index: 3;
}
#c4:checked ~ .flip-book #p4{
    transform: rotateY(-180deg);
    z-index: 4;
}
#c5:checked ~ .flip-book #p5{
    transform: rotateY(-180deg);
    z-index: 5;
}
#c6:checked ~ .flip-book #p6{
    transform: rotateY(-180deg);
    z-index: 6;
}
#c7:checked ~ .flip-book #p7{
    transform: rotateY(-180deg);
    z-index: 7;
}
#c8:checked ~ .flip-book #p8{
    transform: rotateY(-180deg);
    z-index: 8;
}
#c9:checked ~ .flip-book #p9{
    transform: rotateY(-180deg);
    z-index: 9;
}
#c10:checked ~ .flip-book #p10{
    transform: rotateY(-180deg);
    z-index: 10;
}
#c11:checked ~ .flip-book #p11{
    transform: rotateY(-180deg);
    z-index: 11;
}
#c12:checked ~ .flip-book #p12{
    transform: rotateY(-180deg);
    z-index: 12;
}
#c13:checked ~ .flip-book #p13{
    transform: rotateY(-180deg);
    z-index: 13;
}
#c14:checked ~ .flip-book #p14{
    transform: rotateY(-180deg);
    z-index: 14;
}
#c15:checked ~ .flip-book #p15{
    transform: rotateY(-180deg);
    z-index: 15;
}
#c16:checked ~ .flip-book #p16{
    transform: rotateY(-180deg);
    z-index: 16;
}
#c17:checked ~ .flip-book #p17{
    transform: rotateY(-180deg);
    z-index: 17;
}
#c18:checked ~ .flip-book #p18{
    transform: rotateY(-180deg);
    z-index: 18;
}
#c19:checked ~ .flip-book #p19{
    transform: rotateY(-180deg);
    z-index: 19;
}
#c20:checked ~ .flip-book #p20{
    transform: rotateY(-180deg);
    z-index: 20;
}