:root {
  color-scheme: light;
  --maroon: #6f2637;
  --maroon-deep: #3f1721;
  --paper: #fbf7ee;
  --paper-edge: #cfc4b5;
  --ink: #282321;
  --muted-ink: #7b6f67;
  --page-font: Georgia, "Times New Roman", Times, serif;
  --ui-font: Inter, "Helvetica Neue", Arial, sans-serif;
  --page-width: 560px;
  --page-height: 840px;
  --reader-scale: 1;
}

* {
  box-sizing: border-box;
}

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

body {
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 36%, rgb(255 255 255 / 86%), transparent 34%),
    linear-gradient(135deg, #f3eee6 0%, #ddd3c6 100%);
  color: #433a35;
  font-family: var(--ui-font);
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  z-index: -1;
  inset: 0;
  content: "";
  pointer-events: none;
  background:
    linear-gradient(90deg, rgb(255 255 255 / 28%), transparent 22%, transparent 78%, rgb(82 59 44 / 5%)),
    repeating-linear-gradient(0deg, transparent 0 5px, rgb(80 60 48 / 1.4%) 5px 6px);
}

button {
  font: inherit;
}

button:focus-visible,
[tabindex]:focus-visible,
a:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--maroon);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  transform: translateY(-170%);
  border-radius: 999px;
  background: var(--paper);
  box-shadow: 0 8px 24px rgb(62 42 31 / 18%);
  color: var(--ink);
}

.skip-link:focus {
  transform: translateY(0);
}

.app-shell {
  width: 100%;
  height: 100dvh;
  min-height: 480px;
}

.reader-main {
  position: relative;
  display: grid;
  width: 100%;
  height: 100%;
  min-height: 0;
  grid-template-rows: minmax(0, 1fr) auto auto auto;
  align-items: center;
  justify-items: center;
  padding: 8px 14px 9px;
}

.book-scene {
  display: grid;
  width: 100%;
  height: 100%;
  min-height: 0;
  place-items: center;
  perspective: 2400px;
}

.book-frame {
  position: relative;
  transition: width 420ms ease, height 420ms ease;
}

.book {
  position: absolute;
  top: 0;
  left: 0;
  width: var(--page-width);
  height: var(--page-height);
  transform: scale(var(--reader-scale));
  transform-origin: top left;
  transform-style: preserve-3d;
  transition: width 420ms ease, opacity 180ms ease;
  touch-action: pan-y;
  user-select: text;
}

.book.is-preparing {
  opacity: 0;
}

.spread {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(2, var(--page-width));
  filter:
    drop-shadow(0 28px 34px rgb(62 46 35 / 20%))
    drop-shadow(0 7px 10px rgb(62 46 35 / 14%));
}

.book.is-closed .spread,
.book.mode-mobile .spread {
  grid-template-columns: var(--page-width);
}

.page-slot {
  position: relative;
  width: var(--page-width);
  height: var(--page-height);
  min-width: 0;
  transform-style: preserve-3d;
}

.reader-page {
  position: relative;
  width: var(--page-width);
  height: var(--page-height);
  overflow: hidden;
  border: 1px solid var(--paper-edge);
  background:
    linear-gradient(90deg, rgb(103 75 55 / 3%), transparent 9%, transparent 91%, rgb(90 64 48 / 4%)),
    repeating-linear-gradient(0deg, transparent 0 5px, rgb(87 67 51 / 1.1%) 5px 6px),
    var(--paper);
  color: var(--ink);
  font-family: var(--page-font);
  backface-visibility: hidden;
}

.page-slot.left .reader-page {
  border-radius: 3px 0 0 3px;
  box-shadow: inset -32px 0 46px rgb(67 47 36 / 10%);
}

.page-slot.right .reader-page {
  border-radius: 0 3px 3px 0;
  box-shadow: inset 32px 0 46px rgb(67 47 36 / 9%);
}

.book.is-open.mode-desktop::before {
  position: absolute;
  z-index: 20;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 36px;
  content: "";
  pointer-events: none;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, rgb(47 31 23 / 17%), rgb(255 255 255 / 18%), rgb(47 31 23 / 16%), transparent);
  mix-blend-mode: multiply;
}

.book.is-open.mode-desktop::after {
  position: absolute;
  z-index: -1;
  right: 4px;
  bottom: -6px;
  left: 4px;
  height: 10px;
  content: "";
  background: repeating-linear-gradient(90deg, #eee6d9 0 2px, #d4c9ba 2px 3px);
  box-shadow: 0 8px 12px rgb(55 39 30 / 18%);
}

.page-inner {
  position: relative;
  display: flex;
  width: 100%;
  height: 100%;
  flex-direction: column;
  padding: 72px 61px 62px;
}

.mode-mobile .page-inner,
.measure-page.mode-mobile .page-inner {
  padding: 47px 40px 43px;
}

.page-flow {
  min-height: 0;
  flex: 1;
  overflow: hidden;
  font-size: 16.2px;
  line-height: 1.53;
}

.mode-mobile .page-flow,
.measure-page.mode-mobile .page-flow {
  font-size: 16.15px;
  line-height: 1.49;
}

.pagination-unit {
  margin: 0 0 0.76em;
}

.pagination-unit:last-child,
.book-paragraph:last-child {
  margin-bottom: 0;
}

.book-paragraph {
  margin: 0 0 0.76em;
  orphans: 3;
  text-wrap: pretty;
  widows: 3;
}

blockquote.book-paragraph {
  margin: 1.08em 7% 0.74em;
  padding: 0;
  border: 0;
  color: #493d38;
}

.book-paragraph.attribution {
  margin: -0.03em 7% 1.05em;
  color: var(--maroon);
  font-size: 0.88em;
  text-align: right;
}

.book-paragraph strong {
  font-weight: 700;
}

.book-paragraph em {
  font-style: italic;
}

.chapter-unit {
  margin-bottom: 1.75em;
  padding-top: 16%;
}

.chapter-unit::before {
  display: block;
  width: 42px;
  height: 1px;
  margin: 0 auto 27px;
  content: "";
  background: var(--maroon);
}

.chapter-title {
  margin: 0;
  color: var(--maroon-deep);
  font-size: 38px;
  font-weight: 400;
  letter-spacing: 0.01em;
  line-height: 1.1;
  text-align: center;
  text-wrap: balance;
}

.mode-mobile .chapter-title,
.measure-page.mode-mobile .chapter-title {
  font-size: 31px;
}

.page-number {
  position: absolute;
  right: 61px;
  bottom: 27px;
  color: #8c8077;
  font-family: var(--ui-font);
  font-size: 10px;
  letter-spacing: 0.14em;
}

.mode-mobile .page-number {
  right: 40px;
  bottom: 21px;
}

.page-slot.left .page-number {
  right: auto;
  left: 61px;
}

.page--blank {
  background:
    linear-gradient(90deg, rgb(103 75 55 / 3%), transparent 10%, transparent 90%, rgb(90 64 48 / 3%)),
    var(--paper);
}

.page--cover {
  overflow: visible;
  border: 0;
  border-radius: 2px 6px 6px 2px;
  background: #14212a;
  box-shadow:
    0 34px 50px rgb(45 35 29 / 29%),
    0 8px 15px rgb(45 35 29 / 23%),
    inset 7px 0 11px rgb(255 255 255 / 6%);
  cursor: pointer;
}

.page--cover::before {
  position: absolute;
  z-index: -1;
  top: 3px;
  right: -7px;
  bottom: -5px;
  left: 7px;
  content: "";
  border-radius: 0 4px 5px 0;
  background: repeating-linear-gradient(90deg, #efe7da 0 1px, #d5cbbb 1px 2px);
  box-shadow: 5px 7px 12px rgb(44 34 29 / 22%);
}

.page--cover::after {
  position: absolute;
  inset: 0 auto 0 0;
  width: 13px;
  content: "";
  pointer-events: none;
  background: linear-gradient(90deg, rgb(0 0 0 / 36%), transparent);
}

.cover-image {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: inherit;
  object-fit: cover;
  user-select: none;
  -webkit-user-drag: none;
}

.page--image {
  border-color: #d9d2c8;
  background: #fff;
}

.front-matter-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  user-select: none;
  -webkit-user-drag: none;
}

.turn-sheet {
  position: absolute;
  z-index: 40;
  top: 0;
  width: var(--page-width);
  height: var(--page-height);
  transform-style: preserve-3d;
  will-change: transform;
}

.turn-sheet.forward {
  left: 50%;
  transform-origin: left center;
  animation: turn-forward 620ms cubic-bezier(0.55, 0.05, 0.28, 0.98) forwards;
}

.turn-sheet.backward {
  left: 0;
  transform-origin: right center;
  animation: turn-backward 620ms cubic-bezier(0.55, 0.05, 0.28, 0.98) forwards;
}

.book.mode-mobile .turn-sheet {
  left: 0;
}

.turn-face {
  position: absolute;
  inset: 0;
  width: var(--page-width);
  height: var(--page-height);
  overflow: hidden;
  backface-visibility: hidden;
}

.turn-face > .reader-page {
  box-shadow: inset 24px 0 36px rgb(67 47 36 / 9%), 0 12px 32px rgb(54 38 29 / 18%);
}

.turn-back {
  transform: rotateY(180deg);
}

@keyframes turn-forward {
  0% {
    transform: rotateY(0deg);
    filter: brightness(1);
  }
  48% {
    filter: brightness(0.82);
  }
  100% {
    transform: rotateY(-180deg);
    filter: brightness(1);
  }
}

@keyframes turn-backward {
  0% {
    transform: rotateY(-180deg);
    filter: brightness(0.84);
  }
  52% {
    filter: brightness(0.9);
  }
  100% {
    transform: rotateY(0deg);
    filter: brightness(1);
  }
}

.toolbar {
  z-index: 60;
  display: flex;
  max-width: calc(100vw - 20px);
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 4px;
  border: 1px solid rgb(63 23 33 / 14%);
  border-radius: 999px;
  background: rgb(251 247 238 / 94%);
  box-shadow: 0 8px 24px rgb(65 45 34 / 14%);
  backdrop-filter: blur(14px);
}

.tool-button {
  display: inline-flex;
  width: 38px;
  min-height: 38px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: #655b54;
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.tool-button:hover:not(:disabled) {
  border-color: rgb(111 38 55 / 12%);
  background: rgb(111 38 55 / 7%);
  color: var(--maroon);
}

.tool-button:disabled {
  cursor: not-allowed;
  opacity: 0.27;
}

.tool-button svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.65;
}

.open-label {
  display: none;
  font-size: 0.67rem;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-indicator {
  min-width: 88px;
  color: #574d47;
  font-family: var(--page-font);
  font-size: 0.73rem;
  text-align: center;
}

.toolbar-divider {
  width: 1px;
  height: 21px;
  margin: 0 2px;
  background: rgb(63 23 33 / 13%);
}

.reading-progress {
  width: min(520px, 54vw);
  height: 2px;
  overflow: hidden;
  margin-top: 7px;
  background: rgb(87 67 54 / 13%);
}

.reading-progress-value {
  width: 0;
  height: 100%;
  background: var(--maroon);
  transition: width 320ms ease;
}

.reader-hint {
  min-height: 14px;
  margin: 5px 0 0;
  color: #7c7169;
  font-family: var(--page-font);
  font-size: 0.64rem;
}

body:not(.book-open) .toolbar {
  border-color: transparent;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
}

body:not(.book-open) #prevButton,
body:not(.book-open) .page-indicator,
body:not(.book-open) .toolbar-divider,
body:not(.book-open) #tocButton,
body:not(.book-open) #fullscreenButton,
body:not(.book-open) .reading-progress {
  display: none;
}

body:not(.book-open) #nextButton {
  width: auto;
  min-width: 116px;
  padding: 0 16px;
  border: 1px solid rgb(63 23 33 / 14%);
  background: rgb(63 23 33 / 91%);
  box-shadow: 0 7px 20px rgb(53 37 30 / 18%);
  color: #fffaf1;
}

body:not(.book-open) #nextButton .open-label {
  display: inline;
}

.resume-prompt {
  position: fixed;
  z-index: 65;
  bottom: 61px;
  display: grid;
  min-width: 224px;
  gap: 2px;
  padding: 9px 18px;
  border: 1px solid rgb(63 23 33 / 16%);
  border-radius: 999px;
  background: rgb(251 247 238 / 96%);
  box-shadow: 0 8px 24px rgb(65 45 34 / 14%);
  color: #443a35;
  cursor: pointer;
  text-align: center;
}

.resume-prompt[hidden] {
  display: none;
}

.resume-kicker {
  color: var(--maroon);
  font-size: 0.54rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

#resumeLabel {
  color: #665a53;
  font-family: var(--page-font);
  font-size: 0.72rem;
}

.contents-dialog {
  width: min(500px, calc(100vw - 28px));
  max-height: min(700px, calc(100dvh - 32px));
  padding: 0;
  overflow: hidden;
  border: 1px solid #cdbfb0;
  border-radius: 5px;
  background: var(--paper);
  box-shadow: 0 28px 72px rgb(53 39 31 / 34%);
  color: var(--ink);
}

.contents-dialog::backdrop {
  background: rgb(67 54 46 / 46%);
  backdrop-filter: blur(4px);
}

.dialog-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 28px 30px 20px;
  border-bottom: 1px solid #ded4c8;
}

.dialog-kicker {
  color: var(--maroon);
  font-size: 0.61rem;
  font-weight: 750;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.dialog-heading h2 {
  margin: 5px 0 0;
  font-family: var(--page-font);
  font-size: 2.2rem;
  font-weight: 400;
}

.dialog-close {
  width: 36px;
  height: 36px;
  border: 0;
  background: transparent;
  color: #675d58;
  cursor: pointer;
  font-size: 1.7rem;
  line-height: 1;
}

#contentsList {
  display: grid;
  max-height: 46vh;
  padding: 15px 30px;
  overflow: auto;
}

.toc-link {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 18px;
  padding: 15px 0;
  border: 0;
  border-bottom: 1px solid #e3d9ce;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
}

.toc-link:hover {
  color: var(--maroon);
}

.toc-link span:first-child {
  font-family: var(--page-font);
}

.toc-link span:last-child {
  color: #8c7f76;
  font-size: 0.67rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.dialog-actions {
  padding: 14px 30px 22px;
  border-top: 1px solid #ded4c8;
  text-align: right;
}

.return-cover {
  padding: 9px 14px;
  border: 1px solid rgb(111 38 55 / 18%);
  border-radius: 999px;
  background: transparent;
  color: var(--maroon);
  cursor: pointer;
  font-size: 0.69rem;
  font-weight: 720;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.measure-page {
  position: fixed !important;
  z-index: -100 !important;
  top: -10000px !important;
  left: -10000px !important;
  visibility: hidden !important;
}

.loading-page {
  display: grid;
  width: var(--page-width);
  height: var(--page-height);
  place-content: center;
  padding: 50px;
  border: 1px solid var(--paper-edge);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--page-font);
  text-align: center;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

@media (max-width: 700px) {
  .reader-main {
    padding: 5px 7px 7px;
  }

  .toolbar {
    padding: 3px;
  }

  .tool-button {
    width: 36px;
    min-height: 36px;
  }

  .page-indicator {
    min-width: 72px;
    font-size: 0.69rem;
  }

  .reading-progress {
    width: min(78vw, 390px);
    margin-top: 5px;
  }

  .reader-hint {
    font-size: 0.59rem;
  }

  body.book-open .reader-hint {
    visibility: hidden;
  }

  .resume-prompt {
    bottom: 54px;
  }
}

@media (max-height: 620px) {
  .reader-hint {
    display: none;
  }

  .reader-main {
    grid-template-rows: minmax(0, 1fr) auto auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}