/* Picture book of the educational cycle. illustration_only. */
body.cycle-book {
  min-height: 100vh;
  background:
    radial-gradient(1200px 600px at 50% 0%, rgba(30, 200, 255, 0.06), transparent 55%),
    var(--bg0);
}
.book-shell {
  padding: 4.6rem 0 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.spread {
  flex: 1;
  display: grid;
  grid-template-rows: 1fr auto;
  min-height: calc(100vh - 4.6rem);
}
.spread__stage {
  position: relative;
  margin: 0.6rem 1.2rem 0;
  border-radius: 10px;
  overflow: hidden;
  background: #07080f;
  border: 1px solid var(--border);
  min-height: 58vh;
  cursor: ew-resize;
}
.spread__stage img {
  display: block;
  width: 100%;
  height: min(72vh, 860px);
  object-fit: contain;
  background: #07080f;
}
.spread[data-tone="paper"] .spread__stage {
  background: #1a1612;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.45);
}
.spread[data-tone="paper"] .spread__stage img {
  background: #ece6d8;
}
.spread__hit {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 28%;
  border: 0;
  background: transparent;
  cursor: pointer;
}
.spread__hit--prev { left: 0; }
.spread__hit--next { right: 0; }
.plate {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem 1.5rem;
  align-items: end;
  padding: 1rem 1.5rem 1.2rem;
  border-top: 1px solid var(--border);
  background: rgba(4, 5, 10, 0.88);
}
.plate__badge {
  display: inline-block;
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.35rem;
}
.plate h1 {
  font-size: 1.35rem;
  font-weight: 500;
  color: var(--foam);
  margin: 0 0 0.35rem;
}
.plate p {
  margin: 0;
  max-width: 46rem;
  color: var(--mute);
  font-size: 0.92rem;
  line-height: 1.55;
}
.pager {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.55rem;
}
.pager__row {
  display: flex;
  gap: 0.45rem;
}
.pager button {
  min-width: 2.4rem;
  height: 2.2rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: rgba(30, 200, 255, 0.06);
  color: var(--foam);
  cursor: pointer;
  font-size: 1rem;
}
.pager button:hover:not(:disabled) {
  border-color: var(--tide);
  background: rgba(30, 200, 255, 0.16);
}
.pager button:disabled {
  opacity: 0.35;
  cursor: default;
}
.pager__count {
  font-family: "IBM Plex Mono", Menlo, monospace;
  font-size: 0.72rem;
  color: var(--mute);
  letter-spacing: 0.08em;
}
.dots {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.28rem;
  max-width: 16rem;
}
.dots button {
  width: 0.55rem;
  height: 0.55rem;
  min-width: 0;
  padding: 0;
  border-radius: 99px;
  border: 0;
  background: rgba(184, 243, 255, 0.22);
}
.dots button[aria-current="true"] {
  background: var(--gold);
  transform: scale(1.25);
}
.hint {
  text-align: center;
  font-size: 0.68rem;
  color: var(--mute);
  padding: 0.35rem 1rem 0.15rem;
  letter-spacing: 0.06em;
}
@media (max-width: 720px) {
  .plate {
    grid-template-columns: 1fr;
  }
  .pager { align-items: flex-start; }
  .spread__stage img { height: min(52vh, 520px); }
}