@media only screen and (max-width: 600px) {
  .sample-flipbook {
    width: 100% !important;
  }
}

@media only screen and (max-width: 600px){
    .sample-flipbook-ap{
        width: 100% !important;
    }
}

@media only screen and (max-width: 600px){
    .sample-flipbook-checkpoint{
        width: 100% !important;
    }
}

@media only screen and (max-width: 600px){
    .sample-flipbook-finalrevision{
        width: 100% !important
        ;
    }
}


.flipbook-wrap {
    position: relative;
    width: 100%;
    margin: auto;
    }

.sample-flipbook{
    width: 100%;
    height: 100%;
    margin-right: auto;
    margin-left: auto;
    -webkit-transition:margin-left 0.2s;
    -moz-transition:margin-left 0.2s;
    -ms-transition:margin-left 0.2s;
    -o-transition:margin-left 0.2s;
    transition:margin-left 0.2s;
}

.sample-flipbook .page{
    width:100%;
    height:100%;
    background-color:white;
    line-height:300px;
    font-size:20px;
  
  display: flex;
  justify-content: center;
  align-items: center;
}

.sample-flipbook .page-wrapper{
    -webkit-perspective:2000px;
    -moz-perspective:2000px;
    -ms-perspective:2000px;
    -o-perspective:2000px;
    perspective:2000px;
}

.sample-flipbook .hard{
    background:#ccc !important;
    color:#333;
    -webkit-box-shadow:inset 0 0 5px #666;
    -moz-box-shadow:inset 0 0 5px #666;
    -o-box-shadow:inset 0 0 5px #666;
    -ms-box-shadow:inset 0 0 5px #666;
    box-shadow:inset 0 0 5px #666;
    font-weight:bold;
}

.sample-flipbook .odd{
    background:-webkit-gradient(linear, right top, left top, color-stop(0.95, #FFF), color-stop(1, #DADADA));
    background-image:-webkit-linear-gradient(right, #FFF 95%, #C4C4C4 100%);
    background-image:-moz-linear-gradient(right, #FFF 95%, #C4C4C4 100%);
    background-image:-ms-linear-gradient(right, #FFF 95%, #C4C4C4 100%);
    background-image:-o-linear-gradient(right, #FFF 95%, #C4C4C4 100%);
    background-image:linear-gradient(right, #FFF 95%, #C4C4C4 100%);
    -webkit-box-shadow:inset 0 0 5px #666;
    -moz-box-shadow:inset 0 0 5px #666;
    -o-box-shadow:inset 0 0 5px #666;
    -ms-box-shadow:inset 0 0 5px #666;
    box-shadow:inset 0 0 5px #666;
    
}

.sample-flipbook .even{
    background:-webkit-gradient(linear, left top, right top, color-stop(0.95, #fff), color-stop(1, #dadada));
    background-image:-webkit-linear-gradient(left, #fff 95%, #dadada 100%);
    background-image:-moz-linear-gradient(left, #fff 95%, #dadada 100%);
    background-image:-ms-linear-gradient(left, #fff 95%, #dadada 100%);
    background-image:-o-linear-gradient(left, #fff 95%, #dadada 100%);
    background-image:linear-gradient(left, #fff 95%, #dadada 100%);
    -webkit-box-shadow:inset 0 0 5px #666;
    -moz-box-shadow:inset 0 0 5px #666;
    -o-box-shadow:inset 0 0 5px #666;
    -ms-box-shadow:inset 0 0 5px #666;
    box-shadow:inset 0 0 5px #666;
}

img {
  max-width: 100%;
}

.btn {
  font-size: 30px;
  color: black;
  text-decoration: none;
  
  position: absolute;
  top: 50%;
  transform: translateY(-50%)
}



<!--  =====================================================  start for ap =====================================================  -->

.flipbook-wrap-ap {
    position: relative;
    width: 600px;
    margin: 100px; auto;
    }

.sample-flipbook-ap{
    width: 800px;
    height: 400px;
  margin-right: auto;
  margin-left: auto;
    -webkit-transition:margin-left 0.2s;
    -moz-transition:margin-left 0.2s;
    -ms-transition:margin-left 0.2s;
    -o-transition:margin-left 0.2s;
    transition:margin-left 0.2s;
}

.sample-flipbook-ap .page{
    width:400px;
    height:400px;
    background-color:white;
    line-height:300px;
    font-size:20px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.sample-flipbook-ap .page-wrapper{
    -webkit-perspective:2000px;
    -moz-perspective:2000px;
    -ms-perspective:2000px;
    -o-perspective:2000px;
    perspective:2000px;
}

.sample-flipbook-ap .hard-ap{
    background:#ccc !important;
    color:#333;
    -webkit-box-shadow:inset 0 0 5px #666;
    -moz-box-shadow:inset 0 0 5px #666;
    -o-box-shadow:inset 0 0 5px #666;
    -ms-box-shadow:inset 0 0 5px #666;
    box-shadow:inset 0 0 5px #666;
    font-weight:bold;
}

.sample-flipbook-ap .odd{
    background:-webkit-gradient(linear, right top, left top, color-stop(0.95, #FFF), color-stop(1, #DADADA));
    background-image:-webkit-linear-gradient(right, #FFF 95%, #C4C4C4 100%);
    background-image:-moz-linear-gradient(right, #FFF 95%, #C4C4C4 100%);
    background-image:-ms-linear-gradient(right, #FFF 95%, #C4C4C4 100%);
    background-image:-o-linear-gradient(right, #FFF 95%, #C4C4C4 100%);
    background-image:linear-gradient(right, #FFF 95%, #C4C4C4 100%);
    -webkit-box-shadow:inset 0 0 5px #666;
    -moz-box-shadow:inset 0 0 5px #666;
    -o-box-shadow:inset 0 0 5px #666;
    -ms-box-shadow:inset 0 0 5px #666;
    box-shadow:inset 0 0 5px #666;
    
}

.sample-flipbook-ap .even{
    background:-webkit-gradient(linear, left top, right top, color-stop(0.95, #fff), color-stop(1, #dadada));
    background-image:-webkit-linear-gradient(left, #fff 95%, #dadada 100%);
    background-image:-moz-linear-gradient(left, #fff 95%, #dadada 100%);
    background-image:-ms-linear-gradient(left, #fff 95%, #dadada 100%);
    background-image:-o-linear-gradient(left, #fff 95%, #dadada 100%);
    background-image:linear-gradient(left, #fff 95%, #dadada 100%);
    -webkit-box-shadow:inset 0 0 5px #666;
    -moz-box-shadow:inset 0 0 5px #666;
    -o-box-shadow:inset 0 0 5px #666;
    -ms-box-shadow:inset 0 0 5px #666;
    box-shadow:inset 0 0 5px #666;
}

img {
  max-width: 100%;
}

.btn-ap {
  font-size: 30px;
  color: black;
  text-decoration: none;
  
  position: absolute;
  top: 50%;
  transform: translateY(-50%)
}

.next-ap {
  right: -50px;
}

.prev-ap {
  left: -50px;
}   
 

<!--  =====================================================  end for ap =====================================================  -->

<!--  =====================================================  start for checkpoint =====================================================  -->

.flipbook-wrap-checkpoint {
    position: relative;
    width: 600px;
    margin: 100px; auto;
    }

.sample-flipbook-checkpoint{
    width: 800px;
    height: 400px;
  margin-right: auto;
  margin-left: auto;
    -webkit-transition:margin-left 0.2s;
    -moz-transition:margin-left 0.2s;
    -ms-transition:margin-left 0.2s;
    -o-transition:margin-left 0.2s;
    transition:margin-left 0.2s;
}

.sample-flipbook-checkpoint .page{
    width:400px;
    height:400px;
    background-color:white;
    line-height:300px;
    font-size:20px;
  
  display: flex;
  justify-content: center;
  align-items: center;
}

.sample-flipbook-checkpoint .page-wrapper{
    -webkit-perspective:2000px;
    -moz-perspective:2000px;
    -ms-perspective:2000px;
    -o-perspective:2000px;
    perspective:2000px;
}

.sample-flipbook-checkpoint .hard-checkpoint{
    background:#ccc !important;
    color:#333;
    -webkit-box-shadow:inset 0 0 5px #666;
    -moz-box-shadow:inset 0 0 5px #666;
    -o-box-shadow:inset 0 0 5px #666;
    -ms-box-shadow:inset 0 0 5px #666;
    box-shadow:inset 0 0 5px #666;
    font-weight:bold;
}

.sample-flipbook-checkpoint .odd{
    background:-webkit-gradient(linear, right top, left top, color-stop(0.95, #FFF), color-stop(1, #DADADA));
    background-image:-webkit-linear-gradient(right, #FFF 95%, #C4C4C4 100%);
    background-image:-moz-linear-gradient(right, #FFF 95%, #C4C4C4 100%);
    background-image:-ms-linear-gradient(right, #FFF 95%, #C4C4C4 100%);
    background-image:-o-linear-gradient(right, #FFF 95%, #C4C4C4 100%);
    background-image:linear-gradient(right, #FFF 95%, #C4C4C4 100%);
    -webkit-box-shadow:inset 0 0 5px #666;
    -moz-box-shadow:inset 0 0 5px #666;
    -o-box-shadow:inset 0 0 5px #666;
    -ms-box-shadow:inset 0 0 5px #666;
    box-shadow:inset 0 0 5px #666;    
}

.sample-flipbook-checkpoint .even{
    background:-webkit-gradient(linear, left top, right top, color-stop(0.95, #fff), color-stop(1, #dadada));
    background-image:-webkit-linear-gradient(left, #fff 95%, #dadada 100%);
    background-image:-moz-linear-gradient(left, #fff 95%, #dadada 100%);
    background-image:-ms-linear-gradient(left, #fff 95%, #dadada 100%);
    background-image:-o-linear-gradient(left, #fff 95%, #dadada 100%);
    background-image:linear-gradient(left, #fff 95%, #dadada 100%);
    -webkit-box-shadow:inset 0 0 5px #666;
    -moz-box-shadow:inset 0 0 5px #666;
    -o-box-shadow:inset 0 0 5px #666;
    -ms-box-shadow:inset 0 0 5px #666;
    box-shadow:inset 0 0 5px #666;
}

img {
  max-width: 100%;
}

.btn-checkpoint {
  font-size: 30px;
  color: black;
  text-decoration: none;
  
  position: absolute;
  top: 50%;
  transform: translateY(-50%)
}

.next-ap {
  right: -50px;
}

.prev-checkpoint {
  left: -50px;
}   


<!--  =====================================================  end for checkpoint =====================================================  -->
<!--  =====================================================  start for final revision =====================================================  -->

.flipbook-wrap-finalrevision {
    position: relative;
    width: 600px;
    margin: 100px; auto;
    }

.sample-flipbook-finalrevision{
    width: 800px;
    height: 400px;
  margin-right: auto;
  margin-left: auto;
    -webkit-transition:margin-left 0.2s;
    -moz-transition:margin-left 0.2s;
    -ms-transition:margin-left 0.2s;
    -o-transition:margin-left 0.2s;
    transition:margin-left 0.2s;
}

.sample-flipbook-finalrevision .page{
    width:400px;
    height:400px;
    background-color:white;
    line-height:300px;
    font-size:20px;
  
  display: flex;
  justify-content: center;
  align-items: center;
}

.sample-flipbook-finalrevision .page-wrapper{
    -webkit-perspective:2000px;
    -moz-perspective:2000px;
    -ms-perspective:2000px;
    -o-perspective:2000px;
    perspective:2000px;
}

.sample-flipbook-finalrevision .hard-finalrevision{
    background:#ccc !important;
    color:#333;
    -webkit-box-shadow:inset 0 0 5px #666;
    -moz-box-shadow:inset 0 0 5px #666;
    -o-box-shadow:inset 0 0 5px #666;
    -ms-box-shadow:inset 0 0 5px #666;
    box-shadow:inset 0 0 5px #666;
    font-weight:bold;
}

.sample-flipbook-finalrevision .odd{
    background:-webkit-gradient(linear, right top, left top, color-stop(0.95, #FFF), color-stop(1, #DADADA));
    background-image:-webkit-linear-gradient(right, #FFF 95%, #C4C4C4 100%);
    background-image:-moz-linear-gradient(right, #FFF 95%, #C4C4C4 100%);
    background-image:-ms-linear-gradient(right, #FFF 95%, #C4C4C4 100%);
    background-image:-o-linear-gradient(right, #FFF 95%, #C4C4C4 100%);
    background-image:linear-gradient(right, #FFF 95%, #C4C4C4 100%);
    -webkit-box-shadow:inset 0 0 5px #666;
    -moz-box-shadow:inset 0 0 5px #666;
    -o-box-shadow:inset 0 0 5px #666;
    -ms-box-shadow:inset 0 0 5px #666;
    box-shadow:inset 0 0 5px #666;
    
}

.sample-flipbook-finalrevision .even{
    background:-webkit-gradient(linear, left top, right top, color-stop(0.95, #fff), color-stop(1, #dadada));
    background-image:-webkit-linear-gradient(left, #fff 95%, #dadada 100%);
    background-image:-moz-linear-gradient(left, #fff 95%, #dadada 100%);
    background-image:-ms-linear-gradient(left, #fff 95%, #dadada 100%);
    background-image:-o-linear-gradient(left, #fff 95%, #dadada 100%);
    background-image:linear-gradient(left, #fff 95%, #dadada 100%);
    -webkit-box-shadow:inset 0 0 5px #666;
    -moz-box-shadow:inset 0 0 5px #666;
    -o-box-shadow:inset 0 0 5px #666;
    -ms-box-shadow:inset 0 0 5px #666;
    box-shadow:inset 0 0 5px #666;
}

img {
  max-width: 100%;
}

.btn-finalrevision {
  font-size: 30px;
  color: black;
  text-decoration: none;
  
  position: absolute;
  top: 50%;
  transform: translateY(-50%)
}

.next-ap {
  right: -50px;
}

.prev-finalrevision {
  left: -50px;
}