:root {
  --blood: #9f271d;
  --ember: #d48c3d;
  --paper: #ded7c8;
  --ink: #090b0a;
  --page-ratio: 2 / 3;
}

* { box-sizing: border-box; }

html, body {
  min-height: 100%;
  margin: 0;
  background: #060807;
  color: var(--paper);
  font-family: Impact, Haettenschweiler, "Arial Narrow Bold", sans-serif;
  overflow-x: hidden;
}

body {
  min-height: 100svh;
  background:
    radial-gradient(circle at 50% 18%, rgba(95,111,101,.17), transparent 34%),
    linear-gradient(145deg, #111615 0%, #050606 52%, #0c0d0c 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .28;
  background-image:
    repeating-linear-gradient(12deg, transparent 0 3px, rgba(255,255,255,.025) 4px, transparent 5px),
    radial-gradient(#fff 0.45px, transparent .7px);
  background-size: auto, 5px 5px;
  mix-blend-mode: overlay;
}

.rain {
  position: fixed;
  inset: -20%;
  pointer-events: none;
  opacity: .08;
  transform: rotate(12deg);
  background: repeating-linear-gradient(90deg, transparent 0 19px, rgba(175,210,215,.45) 20px, transparent 21px);
  animation: rainMove 7s linear infinite;
}

@keyframes rainMove { to { transform: rotate(12deg) translateY(130px); } }

button { font: inherit; }
button:focus-visible { outline: 3px solid var(--ember); outline-offset: 3px; }

.reader-shell {
  position: relative;
  z-index: 1;
  min-height: 100svh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  padding: max(14px, env(safe-area-inset-top)) clamp(14px, 3vw, 42px) max(14px, env(safe-area-inset-bottom));
}

.reader-header {
  width: min(1220px, 100%);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-bottom: 1px solid rgba(214,202,180,.17);
  padding-bottom: 10px;
}

.brand { display: flex; align-items: baseline; gap: 12px; }
.brand-kicker {
  color: #8f9890;
  font-family: Arial, sans-serif;
  font-size: clamp(.56rem, 1.25vw, .72rem);
  font-weight: 800;
  letter-spacing: .2em;
}
.brand h1 {
  margin: 0;
  font-size: clamp(1.25rem, 3vw, 2rem);
  line-height: 1;
  letter-spacing: .055em;
  text-shadow: 2px 2px 0 #000;
}
.brand h1 span { color: var(--blood); }
.header-actions { display: flex; gap: 8px; }
.icon-button {
  width: 40px;
  aspect-ratio: 1;
  border: 1px solid rgba(223,215,198,.2);
  color: #b9b7ae;
  background: rgba(255,255,255,.035);
  cursor: pointer;
}
.icon-button:hover { color: white; border-color: rgba(223,215,198,.5); }
.icon-button svg { width: 20px; fill: currentColor; }
.sound-off { display: none; }
.icon-button[aria-pressed="false"] .sound-on { display: none; }
.icon-button[aria-pressed="false"] .sound-off { display: inline; }

.comic-stage {
  min-height: 0;
  display: grid;
  place-items: center;
  padding: 14px 0 8px;
  perspective: 2400px;
}

.book-wrap { width: 100%; display: grid; place-items: center; }

.book {
  position: relative;
  height: min(72svh, 760px);
  width: min(calc(72svh * 4 / 3), 1080px, 92vw);
  filter: drop-shadow(0 25px 28px rgba(0,0,0,.68));
  transform-style: preserve-3d;
}

.page {
  position: absolute;
  top: 0;
  width: 50%;
  height: 100%;
  background-color: #171a18;
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
}
.page::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  box-shadow: inset 0 0 35px rgba(0,0,0,.38);
}
.page-left { left: 0; transform-origin: right center; }
.page-right { right: 0; transform-origin: left center; }
.book.cover-mode .page-left { display: none; }
.book.cover-mode .page-right { left: 25%; right: auto; }
.book.last-mode .page-right { display: none; }
.book.last-mode .page-left { left: 25%; }

.spine {
  position: absolute;
  z-index: 5;
  top: 0;
  bottom: 0;
  left: calc(50% - 6px);
  width: 12px;
  opacity: .75;
  background: linear-gradient(90deg, transparent, rgba(0,0,0,.65), rgba(255,255,255,.12), rgba(0,0,0,.7), transparent);
  pointer-events: none;
}
.book.cover-mode .spine, .book.last-mode .spine { display: none; }

.flip-sheet {
  display: none;
  position: absolute;
  z-index: 20;
  top: 0;
  width: 50%;
  height: 100%;
  transform-style: preserve-3d;
  will-change: transform;
}
.flip-sheet.active { display: block; }
.flip-sheet.next {
  right: 0;
  transform-origin: left center;
  animation: turnNext .82s cubic-bezier(.62,.02,.29,1) forwards;
}
.flip-sheet.prev {
  left: 0;
  transform-origin: right center;
  animation: turnPrev .82s cubic-bezier(.62,.02,.29,1) forwards;
}

@keyframes turnNext {
  0% { transform: rotateY(0); filter: brightness(1); }
  45% { filter: brightness(.52); }
  100% { transform: rotateY(-180deg); filter: brightness(1); }
}
@keyframes turnPrev {
  0% { transform: rotateY(0); filter: brightness(1); }
  45% { filter: brightness(.52); }
  100% { transform: rotateY(180deg); filter: brightness(1); }
}

.flip-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  background-color: #171a18;
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
  box-shadow: 0 0 26px rgba(0,0,0,.48);
}
.flip-back { transform: rotateY(180deg); }
.flip-sheet.next .flip-back { box-shadow: -18px 4px 28px rgba(0,0,0,.5); }
.flip-sheet.prev .flip-back { box-shadow: 18px 4px 28px rgba(0,0,0,.5); }
.page-shine {
  position: absolute;
  inset: 0;
  z-index: 3;
  opacity: 0;
  backface-visibility: hidden;
  pointer-events: none;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.25), transparent 65%);
  animation: pageShine .82s ease-in-out;
}
@keyframes pageShine { 45% { opacity: .32; } }

.page-hotspot {
  position: absolute;
  z-index: 30;
  top: 0;
  bottom: 0;
  width: 14%;
  border: 0;
  background: transparent;
  cursor: pointer;
}
.page-hotspot-left { left: 0; cursor: w-resize; }
.page-hotspot-right { right: 0; cursor: e-resize; }
.page-hotspot::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 30px;
  opacity: 0;
  transition: opacity .2s;
}
.page-hotspot-left::after { left: 0; background: linear-gradient(90deg, rgba(212,140,61,.25), transparent); }
.page-hotspot-right::after { right: 0; background: linear-gradient(-90deg, rgba(212,140,61,.25), transparent); }
.page-hotspot:hover::after { opacity: 1; }

.loading {
  position: absolute;
  z-index: 45;
  inset: 0;
  display: none;
  place-content: center;
  grid-template-columns: repeat(3, 7px);
  gap: 6px;
  background: rgba(5,7,6,.72);
  backdrop-filter: blur(3px);
}
.loading.visible { display: grid; }
.loading span {
  width: 7px; height: 7px; border-radius: 50%; background: var(--ember);
  animation: pulse .75s infinite alternate;
}
.loading span:nth-child(2) { animation-delay: .16s; }
.loading span:nth-child(3) { animation-delay: .32s; }
.loading b {
  grid-column: 1 / -1;
  margin-top: 5px;
  font: 700 .62rem Arial, sans-serif;
  letter-spacing: .2em;
  color: #d4cab6;
}
@keyframes pulse { to { opacity: .2; transform: translateY(-4px); } }

.hint {
  margin: 9px 0 0;
  color: #747b75;
  font: 700 clamp(.56rem, 1.5vw, .68rem) Arial, sans-serif;
  letter-spacing: .13em;
  text-transform: uppercase;
  transition: opacity .4s;
}
.hint.hidden { opacity: 0; }

.reader-controls {
  width: min(760px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 110px minmax(130px, 1fr) 110px;
  align-items: center;
  gap: clamp(12px, 4vw, 32px);
}
.nav-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  border: 1px solid rgba(222,215,200,.22);
  color: #cbc7bb;
  background: rgba(255,255,255,.035);
  letter-spacing: .11em;
  cursor: pointer;
}
.nav-button:hover:not(:disabled) { color: white; border-color: var(--blood); background: rgba(159,39,29,.13); }
.nav-button:disabled { opacity: .25; cursor: default; }
.nav-button svg { width: 18px; fill: none; stroke: currentColor; stroke-width: 2.4; }
.page-status { min-width: 0; text-align: center; }
.progress-track { height: 3px; background: #292d2a; margin-bottom: 8px; overflow: hidden; }
.progress-track i {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--blood), var(--ember));
  transition: width .5s ease;
}
#pageLabel {
  color: #9b9e97;
  font: 700 .68rem Arial, sans-serif;
  letter-spacing: .16em;
}

.end-card {
  position: fixed;
  z-index: 100;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: .3s;
  background: rgba(2,3,3,.91);
  backdrop-filter: blur(8px);
}
.end-card.open { opacity: 1; visibility: visible; }
.end-card > div {
  width: min(520px, 100%);
  padding: clamp(28px, 7vw, 58px);
  text-align: center;
  border: 1px solid rgba(212,140,61,.34);
  background:
    linear-gradient(rgba(10,13,11,.92), rgba(5,7,6,.96)),
    radial-gradient(circle at center, var(--blood), transparent 70%);
  box-shadow: 0 30px 80px #000;
}
.end-card span { color: var(--blood); letter-spacing: .25em; }
.end-card h2 { margin: 10px 0; font-size: clamp(2.2rem, 8vw, 4.8rem); line-height: .9; }
.end-card p { color: #969b94; font: 1rem Arial, sans-serif; }
.end-card button {
  margin-top: 14px;
  padding: 13px 22px;
  border: 1px solid var(--ember);
  color: white;
  background: transparent;
  letter-spacing: .13em;
  cursor: pointer;
}

@media (max-width: 720px) {
  .reader-shell { padding-inline: 10px; }
  .brand-kicker { display: none; }
  .book {
    height: min(70svh, calc((100vw - 28px) * 1.5));
    width: min(calc(70svh * 2 / 3), calc(100vw - 28px));
  }
  .page { width: 100%; left: 0 !important; right: auto !important; }
  .page-left, .spine { display: none !important; }
  .book.cover-mode .page-right, .book.last-mode .page-right { display: block; }
  .flip-sheet { width: 100%; }
  .reader-controls { grid-template-columns: 82px 1fr 82px; gap: 9px; }
  .nav-button { font-size: .7rem; }
  .hint { margin-top: 7px; }
}

@media (max-height: 650px) and (orientation: landscape) {
  .reader-header { padding-bottom: 6px; }
  .book { height: 68svh; width: min(calc(68svh * 4 / 3), 78vw); }
  .hint { display: none; }
  .reader-controls { margin-top: 2px; }
}

@media (prefers-reduced-motion: reduce) {
  .rain { animation: none; }
  .flip-sheet.next, .flip-sheet.prev { animation-duration: .01ms; }
  .page-shine { animation: none; }
}