#reader-container {
  width: 100%;
  /*position: absolute;
  top: 80px;
  left: 0;
  right: 0;*/
  /*bottom: 16px;*/
  margin: auto;
  background: transparent;
  z-index: 2;
}
#reader-container.wbg {
  background: inherit;
}
/*#reader-container:fullscreen {
  background: url(image/background.png) 50% 50% no-repeat;
  background-size: cover;
}
#reader-container:-webkit-fullscreen {
  background: url(image/background.png) 50% 50% no-repeat;
  background-size: cover;
}
#reader-container:-webkit-full-screen {
  background: url(image/background.png) 50% 50% no-repeat;
  background-size: cover;
}
#reader-container:-moz-fullscreen {
  background: url(image/background.png) 50% 50% no-repeat;
  background-size: cover;
}
#reader-container:-ms-fullscreen {
  background: url(image/background.png) 50% 50% no-repeat;
  background-size: cover;
}
#background {
  z-index: 1;
  background: url(image/background.png) 50% 50% no-repeat;
  background-size: cover;
  height: 100vh;
  width: 100vw;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  -webkit-filter: sepia(50%) hue-rotate(155deg) saturate(20%);
  filter: sepia(50%) hue-rotate(155deg) saturate(20%);
}*/

.mobile-only {
  display: none;
}
@media only screen and (max-width: 1220px) {
  .desktop-only {
    display: none;
  }
  .mobile-only {
    display: initial;
  }
}
@media only screen and (max-width: 670px) {
  #reader-container {
    /*width: 100%;
    height: 85%;*/
     /* aspect-ratio: 9/16;*/
      height: auto;
    aspect-ratio: 3/4;
  }
}