/* This is a open butten part */ 
body {font-family: Arial, Helvetica, sans-serif;}

/* The Modal (background) */
.modal {
  display: none; /* Hidden by default */
  position: fixed; /* Stay in place */
  z-index: 1; /* Sit on top */
  padding-top: 100px; /* Location of the box */
  left: 0;
  top: 0;
  width: 100%; /* Full width */
  height: 100%; /* Full height */
  overflow: auto; /* Enable scroll if needed */
  background-color: rgb(0,0,0); /* Fallback color */
  background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}

/* Modal Content */
.modal-content {
  background-color: #fefefe;
  margin: auto;
  padding: 5px;
  border: 2px solid #888;
  width: 70%;
   
}

/* The Close Button */
.close {
  margin: 98%;  
  color: red;
  font-size: 50px;
  font-weight: bold;
}
  

.close:hover,
.close:focus {
    
  color: #000;
  text-decoration: none;
  cursor: pointer;

}

   
/* End open butten part */
 
/* This is a open Book part */

 


.page {
  width: 60vw;
  height: 40vw;
  float: left;
  margin-bottom: 0.5em;
  background: top no-repeat;
  background-size: cover;
}
.page:nth-child(even) {
  clear: both;
}
.book {
  perspective: 250vw;
}
.book .pages {
  width: 55vw;
  height: 50vw;
  position: relative;
  transform-style: preserve-3d;
  backface-visibility: hidden;
  border-radius: 4px;
}
.book .page {
  float: none;
  clear: none;
  margin: 0;
  position: absolute;
  top: 0;
  width: 28vw;
  height: 40vw;
  transform-origin: 0 0;
  transition: transform 1.4s;
  backface-visibility: hidden;
  transform-style: preserve-3d;
  cursor: pointer;
  user-select: none;
    b  ackground-color: #f0f0f0;
}
.book .page:before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  transition: background 0.7s;
  z-index: 2;
}
.book .page:nth-child(odd) {
  pointer-events: all;
  transform: rotateY(0deg);
  right: 0;
  border-radius: 0 4px 4px 0;
}
.book .page:nth-child(odd):hover {
  transform: rotateY(-15deg);
}
.book .page:nth-child(odd):hover:before {
  background: rgba(0, 0, 0, 0.03);
}
.book .page:nth-child(odd):before {
  background: rgba(0, 0, 0, 0);
}
.book .page:nth-child(even) {
  pointer-events: none;
  transform: rotateY(180deg);
  transform-origin: 100% 0;
  left: 0;
  border-radius: 4px 0 0 4px;
  border-color: black;
}
.book .page:nth-child(even):before {
  background: rgba(0, 0, 0, 0.2);
}
.book .page.grabbing {
  transition: none;
}
.book .page.flipped:nth-child(odd) {
  pointer-events: none;
  transform: rotateY(-180deg);
}
.book .page.flipped:nth-child(odd):before {
  background: rgba(0, 0, 0, 0.2);
}
.book .page.flipped:nth-child(even) {
  pointer-events: all;
  transform: rotateY(0deg);
}
.book .page.flipped:nth-child(even):hover {
  transform: rotateY(15deg);
}
.book .page.flipped:nth-child(even):hover:before {
  background: rgba(0, 0, 0, 0.03);
}
.book .page.flipped:nth-child(even):before {
  background: rgba(0, 0, 0, 0);

 }


    
@media (max-width: 1000px) {

   /* Modal Content */
.modal-content {
  background-color: #fefefe;
  margin: auto;
  padding: 20px;
  border: 1px solid #888;
  width: 100%;
}


   .book {
  perspective: 500vw;
}
.book .pages {
  width:  95vw;
  height: 75vw;
  position: relative;
  transform-style: preserve-3d;
  backface-visibility: hidden;
  border-radius: 4px;
}

    
   .book .page {
  float: none;
  clear: none;
  margin: 0;
  position: absolute;
  top: 0;
  width:  50vw;
  height: 100%;
  transform-origin: 0 0;
  transition: transform 1.4s;
  backface-visibility: hidden;
  transform-style: preserve-3d;
  cursor: pointer;
  user-select: none;
  background-color: #f0f0f0;
}

 
/* This is a End book part */