.page_body {
  
  width: 80%;
}

.title_img {
  width:100%;
  height:calc(100vh - 200px);
  object-fit:scale-down;
  
}

p {
  font-family: sans-serif;
  text-align: justify;
}

h1 {
  font-style: italic;
  text-align: center;
  font-variant: small-caps;
}

.chapter_title {
  font-style: italic;
  font-variant: small-caps;
  text-align: center; 
  font-weight: bold;
  position: absolute;
  font-size: x-large;
  text-decoration: overline underline;
}

.chapter_title_main {
  font-style: italic;
  font-variant: small-caps;
  text-align: center; 
  font-weight: bold;
  display: table-cell;
  padding: 10px;
}

.chapter_title_main.disabled a {
  pointer-events: none;
}

.chapter_title_main img {
  margin-top: 5px;
  width: 250px;
}

.chapter_title_main.disabled img {
  opacity: 40%;
}

.cover_div {
  width: 900px; 
  margin: auto; 
  font-family:sans-serif; 
  display: table;
}

.chapter_div {
  width: 900px; 
  margin: auto; 
  font-family:sans-serif; 
}

.chapter_img {
 width: 100%;
}

#topBtn {
  display: none; /* Hidden by default */
  position: fixed; /* Fixed/sticky position */
  bottom: 40px; /* Place the button at the bottom of the page */
  right: 10px; /* Place the button 30px from the right */
  z-index: 99; /* Make sure it does not overlap */
  border: none; /* Remove borders */
  outline: none; /* Remove outline */
  background-color: #CC0033; /* Set a background color */
  color: white; /* Text color */
  cursor: pointer; /* Add a mouse pointer on hover */
  padding: 15px; /* Some padding */
  border-radius: 10px; /* Rounded corners */
  font-size: 18px; /* Increase font size */
}

#topBtn:hover {
  background-color: #555; /* Add a dark-grey background on hover */
}

#backBtn {
  position: fixed; /* Fixed/sticky position */
  top: 40px; /* Place the button at the bottom of the page */
  right: 10px; /* Place the button 30px from the right */
  z-index: 99; /* Make sure it does not overlap */
  border: none; /* Remove borders */
  outline: none; /* Remove outline */
  background-color: #999999; /* Set a background color */
  color: white; /* Text color */
  cursor: pointer; /* Add a mouse pointer on hover */
  padding: 15px; /* Some padding */
  border-radius: 10px; /* Rounded corners */
  font-size: 18px; /* Increase font size */
}

#backBtn:hover {
  background-color: #555; /* Add a dark-grey background on hover */
}