/* Immersive document reading. Scoped to the student viewer only. */
.document-viewer [hidden] { display: none !important; }
.document-viewer__zoom,
.document-viewer__orientation,
.document-viewer__reveal { display: none; }
.document-viewer__retry {
  position: absolute;
  z-index: 4;
  left: 50%;
  top: calc(50% + 50px);
  min-height: 44px;
  transform: translateX(-50%);
}
.document-viewer .document-viewer__fullscreen-button {
  min-height: 48px;
  font-weight: 750;
  color: #fff;
  background: #155eef;
}
.document-viewer[data-document-fullscreen-mode] {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: block;
  width: 100%;
  max-width: none;
  height: 100vh;
  height: 100dvh;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: #172033;
  box-shadow: none;
  overflow: hidden;
  animation: none;
}
.document-viewer[data-document-fullscreen-mode] .document-viewer__stage {
  position: absolute;
  inset: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
  width: auto;
  height: auto;
  max-width: none;
  min-height: 0;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: #172033;
  box-shadow: none;
  overflow: hidden;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}
.document-viewer[data-document-fullscreen-mode] .document-viewer__canvas {
  max-width: none;
  max-height: none;
  border-radius: 0;
  box-shadow: none;
  transform-origin: center;
}
.document-viewer[data-document-fullscreen-mode] .document-viewer__header {
  position: absolute;
  top: max(8px, env(safe-area-inset-top));
  right: max(8px, env(safe-area-inset-right));
  z-index: 5;
  display: flex;
  min-height: 0;
  margin: 0;
}
.document-viewer[data-document-fullscreen-mode] .document-viewer__header > div:first-child,
.document-viewer[data-document-fullscreen-mode] .document-viewer__fallback,
.document-viewer[data-document-fullscreen-mode] .document-viewer__page-total { display: none; }
.document-viewer[data-document-fullscreen-mode] .document-viewer__controls {
  position: absolute;
  bottom: max(8px, env(safe-area-inset-bottom));
  left: 50%;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px;
  width: max-content;
  max-width: calc(100% - 16px - env(safe-area-inset-left) - env(safe-area-inset-right));
  margin: 0;
  padding: 6px;
  border-radius: 14px;
  color: #fff;
  background: rgba(23, 32, 51, .94);
  box-shadow: 0 2px 16px #0003;
  transform: translateX(-50%);
}
.document-viewer[data-document-fullscreen-mode] .document-viewer__controls .btn {
  width: auto;
  min-width: 44px;
  min-height: 44px;
  padding: 8px 10px;
  border-color: #ffffff45;
  border-radius: 9px;
  font-size: 14px;
  color: #fff;
  background: #ffffff14;
}
.document-viewer[data-document-fullscreen-mode] .document-viewer__controls .btn:disabled { opacity: .4; }
.document-viewer[data-document-fullscreen-mode] .document-viewer__page-label { gap: 4px; min-height: 44px; }
.document-viewer[data-document-fullscreen-mode] .document-viewer__page-input {
  width: 52px;
  min-height: 44px;
  font-size: 16px;
}
.document-viewer[data-document-fullscreen-mode] .document-viewer__zoom {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.document-viewer[data-document-fullscreen-mode] [data-document-reset] { min-width: 86px; }
.document-viewer[data-document-fullscreen-mode] .document-viewer__reveal {
  position: absolute;
  z-index: 5;
  bottom: max(8px, env(safe-area-inset-bottom));
  left: 50%;
  display: block;
  min-height: 44px;
  padding: 8px 14px;
  border: 1px solid #ffffff50;
  border-radius: 22px;
  color: #fff;
  background: #172033c9;
  font-size: 13px;
  transform: translateX(-50%);
}
.document-viewer[data-document-fullscreen-mode].is-document-controls-hidden .document-viewer__header,
.document-viewer[data-document-fullscreen-mode].is-document-controls-hidden .document-viewer__controls,
.document-viewer[data-document-fullscreen-mode].is-document-controls-hidden .document-viewer__orientation {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}
@media (orientation: portrait) {
  .document-viewer[data-document-fullscreen-mode].is-document-landscape-page .document-viewer__orientation {
    position: absolute;
    z-index: 4;
    top: calc(64px + env(safe-area-inset-top));
    left: 0;
    display: block;
    width: 100%;
    margin: 0;
    padding: 8px;
    color: #fff;
    font-size: 14px;
    text-align: center;
    pointer-events: none;
  }
}
@media (max-width: 520px) {
  .document-viewer[data-document-fullscreen-mode] .document-viewer__zoom { flex-basis: 100%; }
}