.reader-body {
  min-height: 100svh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.reader-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  width: 100%;
  height: 5px;
  background: rgba(255, 255, 255, 0.14);
}

.reader-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--gold), var(--gold-bright));
  transition: width 280ms ease;
}

.reader-topbar {
  position: relative;
  z-index: 10;
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) 64px;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem clamp(1rem, 3vw, 2rem);
}

.reader-title {
  color: var(--tiffany);
  font-weight: 900;
  text-align: center;
}

.reader-main {
  position: relative;
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) 92px;
  grid-template-rows: minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
  width: min(1840px, 100%);
  margin: 0 auto;
  padding: 0 clamp(0.8rem, 2vw, 2rem) 1rem;
}

.book-stage {
  min-height: 0;
  perspective: 1800px;
}

.book-spread {
  position: relative;
  width: 100%;
  min-height: min(74svh, 840px);
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(360px, 0.65fr);
  border: 2px solid rgba(240, 208, 111, 0.88);
  border-radius: var(--radius);
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0) calc(50% - 20px), rgba(0, 0, 0, 0.32) 50%, rgba(255, 255, 255, 0.05) calc(50% + 20px)),
    linear-gradient(135deg, rgba(255, 247, 223, 0.98), rgba(233, 210, 156, 0.96));
  box-shadow: var(--shadow-deep), 0 0 0 8px rgba(201, 168, 76, 0.08);
  transform-style: preserve-3d;
}

.book-spread::before {
  position: absolute;
  inset: 0;
  content: "";
  z-index: 2;
  pointer-events: none;
  opacity: 0.18;
  background-image:
    radial-gradient(circle at 20% 15%, rgba(255, 255, 255, 0.35), transparent 18rem),
    linear-gradient(135deg, rgba(0, 0, 0, 0.06), rgba(255, 255, 255, 0.08));
  mix-blend-mode: multiply;
}

.book-spread.is-visual-only {
  grid-template-columns: 1fr;
  min-height: min(78svh, 900px);
}

.book-spread.is-visual-only .text-page {
  display: none;
}

.book-spread.is-visual-only .image-page,
.book-spread.is-visual-only .image-wrap {
  height: min(78svh, 900px);
}

.book-page {
  min-width: 0;
  min-height: 0;
}

.image-page {
  position: relative;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 50% 45%, rgba(129, 216, 208, 0.22), transparent 28rem),
    rgba(7, 10, 13, 0.16);
}

.image-wrap {
  position: relative;
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 0 18px rgba(129, 216, 208, 0.3));
}

.image-wrap[data-fit="cover"] img {
  object-fit: cover;
}

.image-wrap[data-fit="contain"] img {
  object-fit: contain;
}

.book-spread.is-visual-only #pageImage {
  width: auto !important;
  height: min(72svh, 820px) !important;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  background: rgba(255, 255, 255, 0.08);
}

.text-page {
  position: relative;
  display: grid;
  place-items: center;
  padding: clamp(1.25rem, 3vw, 3rem);
  color: #07162a;
  background:
    radial-gradient(circle at 20% 14%, rgba(129, 216, 208, 0.28), transparent 16rem),
    radial-gradient(circle at 86% 86%, rgba(240, 208, 111, 0.3), transparent 18rem),
    linear-gradient(135deg, #fff9df, #f8e7a9);
}

.story-text {
  width: min(100%, 680px);
  display: grid;
  gap: 0.9rem;
  font-size: clamp(1.62rem, 2.15vw, 2.18rem);
  font-weight: 900;
  line-height: 1.23;
}

.story-text.left {
  text-align: left;
}

.story-text.centered {
  text-align: center;
}

.story-text p {
  margin: 0;
}

.story-text p:first-child {
  color: #a34418;
  font-family: var(--display);
  font-size: 1.3em;
  line-height: 1;
}

.book-spread[data-page-type="dedication"] {
  grid-template-columns: minmax(0, 0.82fr) minmax(360px, 1.18fr);
}

.book-spread[data-page-type="dedication"] .image-page {
  background:
    radial-gradient(circle at 50% 42%, rgba(129, 216, 208, 0.38), transparent 22rem),
    linear-gradient(135deg, #101c2e, #060d18);
}

.book-spread[data-page-type="dedication"] .image-wrap img {
  width: auto;
  max-width: 92%;
  height: 92%;
}

.book-spread[data-page-type="dedication"] .story-text {
  font-size: clamp(1.65rem, 2.35vw, 2.5rem);
  color: #07162a;
}

.book-spread[data-page-type="dedication"] .story-text p:first-child {
  color: #9b4319;
  font-size: 1.4em;
}

.book-spread[data-page-type="sel_activity"] {
  background: linear-gradient(135deg, #fffdf4, #f8f0cf);
}

.book-spread[data-page-type="sel_activity"] #pageImage,
.book-spread[data-page-type="coming_soon"] #pageImage,
.book-spread[data-page-type="back_cover"] #pageImage {
  height: min(74svh, 850px) !important;
}

.book-spread[data-page-type="author"] .story-text {
  font-size: clamp(1.02rem, 1.25vw, 1.32rem);
  line-height: 1.34;
}

.book-spread[data-page-type="author"] .story-text p:first-child,
.book-spread[data-page-type="coming_soon"] .story-text p:first-child {
  color: #0b5e66;
}

.nav-arrow {
  width: 76px;
  min-width: 76px;
  height: 96px;
  border: 1px solid rgba(240, 208, 111, 0.8);
  border-radius: var(--radius);
  color: var(--black);
  background: linear-gradient(180deg, var(--gold-bright), var(--gold));
  font-family: var(--display);
  font-size: 5rem;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.22);
  transition: transform 180ms ease, opacity 180ms ease;
}

.nav-arrow:hover,
.nav-arrow:focus-visible {
  transform: translateY(-2px) scale(1.02);
}

.nav-arrow:disabled {
  cursor: default;
  opacity: 0.38;
}

.nav-arrow:disabled:hover {
  transform: none;
}

.reader-status {
  grid-column: 2;
  min-height: 48px;
  display: grid;
  place-items: center;
}

.reader-status p {
  margin: 0;
  color: var(--tiffany);
  font-size: 1.15rem;
  font-weight: 900;
}

.book-spread.flip-next {
  animation: flip-next 520ms ease-in-out;
}

.book-spread.flip-prev {
  animation: flip-prev 520ms ease-in-out;
}

.anim-float img {
  animation: image-float 3s ease-in-out infinite;
}

.anim-bounce img {
  animation: image-bounce 760ms cubic-bezier(0.18, 0.89, 0.32, 1.28);
}

.anim-shimmer::after {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  background: linear-gradient(115deg, transparent 20%, rgba(240, 208, 111, 0.28) 48%, transparent 68%);
  transform: translateX(-120%);
  animation: shimmer-pass 4s ease-in-out infinite;
}

.anim-sparkle::before,
.anim-sparkle::after {
  position: absolute;
  width: 12px;
  height: 12px;
  content: "";
  pointer-events: none;
  background: var(--gold-bright);
  clip-path: polygon(50% 0, 62% 34%, 100% 50%, 62% 66%, 50% 100%, 38% 66%, 0 50%, 38% 34%);
  filter: drop-shadow(0 0 10px rgba(240, 208, 111, 0.8));
  animation: sparkle-pop 2.6s ease-in-out infinite;
}

.anim-sparkle::before {
  top: 12%;
  left: 10%;
}

.anim-sparkle::after {
  right: 12%;
  bottom: 14%;
  animation-delay: 900ms;
}

.end-screen {
  position: absolute;
  inset: 0 clamp(1rem, 3vw, 2rem) 1rem;
  z-index: 12;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 1rem;
  border: 2px solid rgba(240, 208, 111, 0.86);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  background:
    radial-gradient(circle at 50% 20%, rgba(129, 216, 208, 0.22), transparent 30rem),
    linear-gradient(135deg, rgba(6, 16, 31, 0.96), rgba(13, 13, 13, 0.98));
  box-shadow: var(--shadow-deep);
}

.end-screen[hidden] {
  display: none;
}

.end-screen h1 {
  font-size: clamp(4rem, 12vw, 9rem);
}

.end-screen p {
  margin: 0;
  max-width: 680px;
  font-size: clamp(1.25rem, 2vw, 1.75rem);
}

.confetti-field {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.confetti {
  position: absolute;
  top: -16px;
  width: 12px;
  height: 18px;
  border-radius: 2px;
  animation: confetti-fall 2.9s linear forwards;
}

.reader-footer {
  padding-top: 0.3rem;
}

@keyframes flip-next {
  0% {
    transform: scale(1);
  }

  36% {
    transform: scale(1.02) rotateY(-7deg);
  }

  100% {
    transform: scale(1) rotateY(0);
  }
}

@keyframes flip-prev {
  0% {
    transform: scale(1);
  }

  36% {
    transform: scale(1.02) rotateY(7deg);
  }

  100% {
    transform: scale(1) rotateY(0);
  }
}

@keyframes image-float {
  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-10px);
  }
}

@keyframes image-bounce {
  0% {
    transform: translateY(24px) scale(0.98);
  }

  70% {
    transform: translateY(-8px) scale(1.01);
  }

  100% {
    transform: translateY(0) scale(1);
  }
}

@keyframes shimmer-pass {
  0%,
  28% {
    transform: translateX(-120%);
  }

  58%,
  100% {
    transform: translateX(120%);
  }
}

@keyframes sparkle-pop {
  0%,
  100% {
    opacity: 0;
    transform: scale(0.4) rotate(0deg);
  }

  45% {
    opacity: 1;
    transform: scale(1.35) rotate(90deg);
  }
}

@keyframes confetti-fall {
  to {
    transform: translateY(110vh) rotate(720deg);
    opacity: 0.2;
  }
}

@media (max-width: 980px) {
  .reader-topbar {
    grid-template-columns: 64px 1fr 64px;
  }

  .reader-title span {
    display: none;
  }

  .reader-main {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto auto;
    align-content: center;
  }

  .book-stage {
    grid-column: 1 / -1;
    order: 1;
  }

  .book-spread {
    min-height: auto;
    grid-template-columns: 1fr;
  }

  .text-page {
    padding: 1.25rem;
  }

  .story-text {
    font-size: clamp(1.25rem, 4.5vw, 1.65rem);
  }

  .nav-arrow {
    order: 2;
    width: 100%;
    height: 72px;
    min-width: 0;
    font-size: 4rem;
  }

  .nav-arrow-left {
    grid-column: 1;
  }

  .nav-arrow-right {
    grid-column: 2;
  }

  .reader-status {
    grid-column: 1 / -1;
    order: 3;
  }

  .image-wrap img {
    max-height: 58svh;
  }
}

@media (max-width: 560px) {
  .reader-topbar {
    padding-inline: 0.7rem;
  }

  .reader-main {
    padding-inline: 0.7rem;
  }

  .round-control {
    min-width: 58px;
    min-height: 58px;
  }
}