:root {
  color-scheme: dark;
  --reader-bg: #080705;
  --reader-ink: #f7ead1;
  --reader-muted: rgba(247, 234, 209, 0.68);
  --reader-line: rgba(247, 234, 209, 0.22);
  --reader-paper: #ead6ae;
  --reader-red: #b3211a;
  --reader-panel: rgba(8, 7, 5, 0.72);
  --bg: #05080b;
  --ink: var(--reader-ink);
  --warm: #fff1d2;
  --muted: var(--reader-muted);
  --line: rgba(247, 234, 209, 0.24);
  --panel: rgba(5, 8, 11, 0.78);
  --accent: var(--reader-red);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  min-height: 100svh;
  background:
    radial-gradient(circle at 50% 16%, rgba(179, 33, 26, 0.22), transparent 27rem),
    linear-gradient(180deg, #1c1510 0%, var(--reader-bg) 56%, #020202 100%);
  color: var(--reader-ink);
  font-family: Georgia, "Times New Roman", serif;
}

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

.reader-topbar {
  position: relative;
  z-index: 50;
  border-bottom: 1px solid var(--reader-line);
  overflow: visible;
}

.reader-controls {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  width: min(94vw, 1180px);
  margin-top: 0.85rem;
  padding: 0.62rem 0.72rem;
  background: rgba(8, 7, 5, 0.54);
  border: 1px solid var(--reader-line);
  border-radius: 0.45rem;
  backdrop-filter: blur(12px);
}

.reader-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.reader-topbar {
  width: 100%;
  padding: clamp(0.7rem, 2vw, 1rem) clamp(0.9rem, 3vw, 1.6rem);
  background: rgba(8, 7, 5, 0.48);
  backdrop-filter: blur(12px);
}

.reader-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
  color: inherit;
  text-decoration: none;
}

.reader-brand img {
  width: 2.75rem;
  height: 2.75rem;
  object-fit: contain;
  filter: drop-shadow(0 0.45rem 0.8rem rgba(0, 0, 0, 0.46));
}

.reader-title {
  min-width: 0;
}

.reader-title strong,
.reader-title span {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.reader-title strong {
  font-size: clamp(1rem, 2vw, 1.28rem);
  letter-spacing: 0;
}

.reader-title span {
  color: var(--reader-muted);
  font-size: 0.86rem;
}

.reader-actions,
.reader-stepper {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  flex: 0 0 auto;
}

.reader-actions.site-nav {
  justify-content: flex-end;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1;
}

.reader-actions .site-nav__details {
  z-index: 60;
}

.reader-actions .site-nav__toggle {
  font: inherit;
  font-size: 0.9rem;
}

.reader-actions .site-nav__panel {
  z-index: 100;
  list-style: none;
}

.reader-actions .site-nav__panel a,
.reader-actions .site-nav__heading {
  font-family: inherit;
}

.reader-button,
.reader-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.35rem;
  padding: 0.45rem 0.72rem;
  border: 1px solid var(--reader-line);
  border-radius: 0.35rem;
  background: rgba(247, 234, 209, 0.08);
  color: var(--reader-ink);
  font: 700 0.9rem/1 Georgia, "Times New Roman", serif;
  text-decoration: none;
  cursor: pointer;
}

.reader-button:hover,
.reader-button:focus-visible,
.reader-link:hover,
.reader-link:focus-visible {
  background: rgba(247, 234, 209, 0.15);
  border-color: rgba(247, 234, 209, 0.42);
  outline: none;
}

.reader-button:disabled {
  opacity: 0.42;
  cursor: not-allowed;
}

.reader-stage {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  align-content: center;
  min-height: 0;
  padding: clamp(0.8rem, 2.2vw, 1.6rem);
  perspective: 1800px;
}

.book {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  width: min(94vw, 1180px);
  max-height: calc(100svh - 10rem);
  aspect-ratio: 2 / 1.414;
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.32), transparent 4%, transparent 96%, rgba(0, 0, 0, 0.32)),
    var(--reader-paper);
  border: 1px solid rgba(247, 234, 209, 0.22);
  box-shadow:
    0 2.6rem 5rem rgba(0, 0, 0, 0.62),
    inset 0 0 2.8rem rgba(49, 27, 8, 0.26);
  transform-style: preserve-3d;
  overflow: hidden;
}

.book::after {
  position: absolute;
  inset: 0 50% 0 auto;
  width: 1.2rem;
  content: "";
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.24), rgba(255, 255, 255, 0.08), rgba(0, 0, 0, 0.22));
  transform: translateX(50%);
  pointer-events: none;
}

.book.is-turning-forward .book-page--right {
  animation: xemo-page-forward 420ms ease-in-out;
}

.book.is-turning-back .book-page--left {
  animation: xemo-page-back 420ms ease-in-out;
}

.book-page {
  position: relative;
  display: grid;
  place-items: center;
  margin: 0;
  min-width: 0;
  background: #ead6ae;
  overflow: hidden;
}

.book-page--left {
  box-shadow: inset -1.1rem 0 1.6rem rgba(74, 38, 10, 0.16);
}

.book-page--right {
  box-shadow: inset 1.1rem 0 1.6rem rgba(74, 38, 10, 0.16);
}

.book-page img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #ead6ae;
  user-select: none;
}

.book-page.is-empty::before {
  color: rgba(63, 37, 17, 0.42);
  content: "XEMO";
  font-size: clamp(1.4rem, 5vw, 3rem);
  letter-spacing: 0.04em;
}

.reader-counter {
  justify-self: start;
  color: var(--reader-muted);
  font-size: 0.92rem;
  text-align: center;
  grid-column: 1;
  grid-row: 1;
}

.reader-stepper {
  justify-self: center;
  grid-column: 2;
  grid-row: 1;
}

.reader-hint {
  justify-self: end;
  grid-column: 3;
  grid-row: 1;
  color: rgba(247, 234, 209, 0.52);
  font-size: 0.78rem;
}

.reader-error {
  width: min(44rem, calc(100vw - 2rem));
  padding: 1.25rem;
  background: rgba(8, 7, 5, 0.72);
  border: 1px solid var(--reader-line);
  border-radius: 0.5rem;
  color: var(--reader-ink);
}

@keyframes xemo-page-forward {
  0% {
    transform: rotateY(0deg);
    transform-origin: left center;
  }
  50% {
    filter: brightness(0.78);
  }
  100% {
    transform: rotateY(-8deg);
    transform-origin: left center;
  }
}

@keyframes xemo-page-back {
  0% {
    transform: rotateY(0deg);
    transform-origin: right center;
  }
  50% {
    filter: brightness(0.78);
  }
  100% {
    transform: rotateY(8deg);
    transform-origin: right center;
  }
}

@media (max-width: 760px) {
  .reader-topbar,
  .reader-controls {
    align-items: stretch;
    flex-wrap: wrap;
  }

  .reader-controls {
    grid-template-columns: 1fr;
  }

  .reader-actions,
  .reader-stepper {
    width: 100%;
    justify-content: space-between;
  }

  .reader-counter,
  .reader-stepper,
  .reader-hint {
    justify-self: stretch;
    grid-column: 1;
  }

  .reader-counter {
    grid-row: 1;
    text-align: left;
  }

  .reader-stepper {
    grid-row: 2;
  }

  .reader-hint {
    grid-row: 3;
    text-align: center;
  }

  .reader-link,
  .reader-button {
    flex: 1 1 auto;
  }

  .reader-stage {
    padding: 0.65rem;
  }

  .book {
    grid-template-columns: 1fr;
    width: min(96vw, 34rem);
    max-height: calc(100svh - 13rem);
    aspect-ratio: 1 / 1.414;
  }

  .book::after,
  .book-page--left {
    display: none;
  }

  .book-page--right {
    box-shadow: inset 0 0 1.4rem rgba(74, 38, 10, 0.12);
  }

  .reader-hint {
    display: none;
  }
}