/*header, .header {
  position: sticky;
  top: 0;
  z-index: 1000;
}*/


/*#reading-progress {
  position: absolute;
  bottom: 0; 
  left: 0;
  height: 8px;
  background: linear-gradient(to right, green, red);
  width: 0%;
  z-index: 10;
  transition: width 0.1s ease-out;
}*/


/*footer, .footer {
  position: relative;
}


#footer-progress {
  position: absolute;
  top: 0; 
  left: 0;
  height: 4px;
  background: linear-gradient(to right, green, red);
  width: 0%;
  z-index: 10;
  transition: width 0.1s ease-out;
}*/

#page-progress {
  position: fixed;
  left: 0;
  height: 8px;
  background: linear-gradient(to right, green, red);
  width: 0%;
  z-index: 10;
  transition: width 0.1s ease-out;
}