:root {
  color-scheme: dark;
  --bg: #101214;
  --panel: #1d2426;
  --ink: #f4fbfa;
  --muted: #b9c8c6;
  --edge: rgba(244, 251, 250, 0.16);
  --shadow: rgba(0, 0, 0, 0.48);
  --accent: #6ee7d8;
  --book-scale: 1;
  --book-pan-x: 0px;
  --book-pan-y: 0px;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 16%, rgba(110, 231, 216, 0.12), transparent 28rem),
    linear-gradient(135deg, #101214, #1d2528 52%, #111318);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
}

button,
input {
  font: inherit;
}

.reader {
  width: 100vw;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  gap: 18px;
  padding: clamp(14px, 2.2vw, 28px);
}

.stage {
  position: relative;
  z-index: 1;
  min-height: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
  touch-action: none;
  user-select: none;
}

.book-shell {
  position: relative;
  width: min(100%, calc((100vh - 120px) * 2.1));
  width: min(100%, calc((100svh - 120px) * 2.1));
  max-height: calc(100vh - 120px);
  max-height: calc(100svh - 120px);
  aspect-ratio: 21 / 10;
  border-radius: 6px;
  filter: drop-shadow(0 24px 34px var(--shadow));
  transform: translate3d(var(--book-pan-x), var(--book-pan-y), 0) scale(var(--book-scale));
  transform-origin: center;
  transition: transform 160ms ease;
  will-change: transform;
}

.book-shell.is-zooming,
.book-shell.is-panning {
  transition: none;
}

.book-shell::before,
.book-shell::after {
  content: "";
  position: absolute;
  inset: 10px;
  z-index: -1;
  border-radius: 6px;
  background: #ede2c9;
  transform: translateY(10px) rotate(-1.1deg);
  opacity: 0.34;
}

.book-shell::after {
  transform: translateY(18px) rotate(1.2deg);
  opacity: 0.2;
}

.comic-image {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 6px;
  background: #f7efd9;
  object-fit: contain;
  user-select: none;
  -webkit-user-drag: none;
  image-rendering: auto;
  transform: translateZ(0);
}

.book-shell.turn-next .comic-image {
  animation: pageInNext 180ms ease-out;
}

.book-shell.turn-prev .comic-image {
  animation: pageInPrev 180ms ease-out;
}

@keyframes pageInNext {
  from {
    opacity: 0.35;
    transform: translateX(18px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pageInPrev {
  from {
    opacity: 0.35;
    transform: translateX(-18px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.controls {
  position: relative;
  z-index: 10;
  width: min(760px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) 48px;
  align-items: center;
  gap: 12px;
}

.icon-button {
  width: 48px;
  height: 48px;
  padding: 0;
  display: grid;
  place-items: center;
  border: 1px solid rgba(244, 251, 250, 0.22);
  border-radius: 999px;
  background: rgba(29, 36, 38, 0.84);
  color: var(--ink);
  cursor: pointer;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.28);
}

.icon-button span {
  display: block;
  width: 1em;
  height: 1em;
  line-height: 0.86;
  text-align: center;
  font-size: 34px;
  transform: translateY(-1px);
}

.icon-button:hover,
.icon-button:focus-visible {
  border-color: rgba(110, 231, 216, 0.72);
  color: var(--accent);
  outline: none;
}

.icon-button:disabled {
  opacity: 0.34;
  cursor: default;
}

.progress {
  min-width: 0;
  display: grid;
  gap: 8px;
  align-items: center;
  padding: 10px 14px;
  border: 1px solid rgba(244, 251, 250, 0.14);
  border-radius: 8px;
  background: rgba(29, 36, 38, 0.72);
  color: var(--muted);
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(12px);
}

#pageCounter {
  min-height: 18px;
  text-align: center;
  font-size: 14px;
}

#pageRange {
  width: 100%;
  accent-color: var(--accent);
}

@media (max-width: 700px) {
  body {
    overflow: hidden;
  }

  .reader {
    min-height: 100dvh;
    grid-template-rows: minmax(0, 1fr) auto;
    gap: 10px;
    padding: 10px;
  }

  .book-shell {
    width: min(100%, calc((100dvh - 96px) * 2.1));
    max-height: calc(100dvh - 96px);
  }

  .controls {
    grid-template-columns: 42px minmax(0, 1fr) 42px;
    gap: 8px;
  }

  .icon-button {
    width: 42px;
    height: 42px;
  }

  .icon-button span {
    font-size: 31px;
  }

  .progress {
    gap: 5px;
    padding: 7px 10px;
  }

  #pageCounter {
    font-size: 12px;
  }
}

@media (max-width: 700px) and (orientation: portrait) {
  .reader {
    align-content: center;
  }

  .stage {
    align-items: center;
  }
}

@media (pointer: coarse) {
  .reader {
    min-height: 100dvh;
    gap: 10px;
    padding: 10px;
  }

  .book-shell {
    width: min(100%, calc((100dvh - 96px) * 2.1));
    max-height: calc(100dvh - 96px);
  }

  .controls {
    grid-template-columns: 42px minmax(0, 1fr) 42px;
    gap: 8px;
  }

  .icon-button {
    width: 42px;
    height: 42px;
  }

  .icon-button span {
    font-size: 31px;
  }

  .progress {
    gap: 5px;
    padding: 7px 10px;
  }

  #pageCounter {
    font-size: 12px;
  }
}

@media (pointer: coarse) and (orientation: landscape) {
  .reader {
    gap: 6px;
    padding: 6px 10px;
  }

  .book-shell {
    width: min(100%, calc((100dvh - 70px) * 2.1));
    max-height: calc(100dvh - 70px);
  }

  .controls {
    grid-template-columns: 38px minmax(0, 1fr) 38px;
    max-width: 620px;
  }

  .icon-button {
    width: 38px;
    height: 38px;
  }

  .icon-button span {
    font-size: 29px;
  }
}