.pdfbook {
  --pdfbook-height: 680px;
  --pdfbook-paper: #fffdf7;
  --pdfbook-ink: #1d2630;
  --pdfbook-muted: #6b7280;
  --pdfbook-line: rgba(29, 38, 48, 0.16);
  --pdfbook-shadow: rgba(17, 24, 39, 0.24);
  color: var(--pdfbook-ink);
  width: 100%;
}

.pdfbook,
.pdfbook * {
  box-sizing: border-box;
}

.pdfbook__heading {
  font-size: 1.125rem;
  font-weight: 700;
  margin: 0 0 0.75rem;
}

.pdfbook__notice {
  border: 1px solid var(--pdfbook-line);
  border-radius: 8px;
  color: var(--pdfbook-muted);
  padding: 1rem;
}

.pdfbook__picker {
  align-items: center;
  display: flex;
  gap: 0.75rem;
  margin: 0 0 0.85rem;
}

.pdfbook__picker-label {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0;
}

.pdfbook__select {
  appearance: auto;
  background: #ffffff;
  border: 1px solid var(--pdfbook-line);
  border-radius: 8px;
  color: var(--pdfbook-ink);
  flex: 1 1 18rem;
  font: inherit;
  font-size: 1rem;
  max-width: 32rem;
  min-height: 2.5rem;
  min-width: 0;
  padding: 0.4rem 0.65rem;
}

.pdfbook__stage {
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.10), transparent 11%, transparent 89%, rgba(0, 0, 0, 0.10)),
    radial-gradient(circle at 50% 45%, rgba(255, 255, 255, 0.55), rgba(236, 230, 216, 0.72));
  border: 1px solid var(--pdfbook-line);
  border-radius: 8px;
  box-shadow: 0 20px 50px rgba(17, 24, 39, 0.14);
  height: var(--pdfbook-height);
  max-height: min(var(--pdfbook-height), 82vh);
  min-height: 320px;
  overflow: hidden;
  perspective: 2400px;
  position: relative;
}

.pdfbook__stage:focus {
  outline: 2px solid rgba(37, 99, 235, 0.45);
  outline-offset: 3px;
}

.pdfbook__book {
  align-items: center;
  display: flex;
  gap: 0;
  height: 100%;
  justify-content: center;
  padding: clamp(12px, 2vw, 28px);
  position: relative;
  transform-style: preserve-3d;
  width: 100%;
}

.pdfbook__page,
.pdfbook__turn {
  align-items: center;
  background: var(--pdfbook-paper);
  box-shadow: 0 14px 38px var(--pdfbook-shadow);
  display: flex;
  height: 100%;
  justify-content: center;
  max-height: calc(100% - clamp(24px, 4vw, 56px));
  max-width: 50%;
  overflow: hidden;
  position: relative;
}

.pdfbook__page--left {
  border-radius: 5px 0 0 5px;
  transform-origin: right center;
}

.pdfbook__page--right {
  border-left: 1px solid rgba(0, 0, 0, 0.13);
  border-radius: 0 5px 5px 0;
  transform-origin: left center;
}

.pdfbook__page canvas,
.pdfbook__turn canvas {
  display: block;
  height: auto;
  max-height: 100%;
  max-width: 100%;
  width: auto;
}

.pdfbook__page--left::after,
.pdfbook__page--right::before {
  content: "";
  inset: 0;
  pointer-events: none;
  position: absolute;
}

.pdfbook__page--left::after {
  background: linear-gradient(90deg, transparent 74%, rgba(0, 0, 0, 0.13));
}

.pdfbook__page--right::before {
  background: linear-gradient(90deg, rgba(0, 0, 0, 0.13), transparent 26%);
}

.pdfbook__turn {
  backface-visibility: hidden;
  display: none;
  max-width: min(50%, 720px);
  position: absolute;
  top: clamp(12px, 2vw, 28px);
  transform-style: preserve-3d;
  z-index: 4;
}

.pdfbook.is-turning-next .pdfbook__turn,
.pdfbook.is-turning-prev .pdfbook__turn {
  display: flex;
}

.pdfbook.is-turning-next .pdfbook__turn {
  animation: pdfbook-next var(--pdfbook-duration, 520ms) ease-in-out both;
  border-radius: 0 5px 5px 0;
  left: 50%;
  transform-origin: left center;
}

.pdfbook.is-turning-prev .pdfbook__turn {
  animation: pdfbook-prev var(--pdfbook-duration, 520ms) ease-in-out both;
  border-radius: 5px 0 0 5px;
  right: 50%;
  transform-origin: right center;
}

.pdfbook__loading {
  align-items: center;
  background: rgba(255, 255, 255, 0.82);
  color: var(--pdfbook-muted);
  display: flex;
  inset: 0;
  justify-content: center;
  position: absolute;
  z-index: 8;
}

.pdfbook.is-ready .pdfbook__loading,
.pdfbook.is-error .pdfbook__loading {
  display: none;
}

.pdfbook__error {
  align-items: center;
  background: rgba(255, 255, 255, 0.94);
  color: #991b1b;
  display: none;
  inset: 0;
  justify-content: center;
  padding: 1rem;
  position: absolute;
  text-align: center;
  z-index: 6;
}

.pdfbook.is-error .pdfbook__error {
  display: flex;
}

.pdfbook[data-pdfbook-mode="single"] .pdfbook__page,
.pdfbook[data-pdfbook-mode="cover"] .pdfbook__page {
  max-width: min(100%, 760px);
}

.pdfbook[data-pdfbook-mode="single"] .pdfbook__page--left,
.pdfbook[data-pdfbook-mode="cover"] .pdfbook__page--left {
  display: none;
}

.pdfbook[data-pdfbook-mode="single"] .pdfbook__page--right,
.pdfbook[data-pdfbook-mode="cover"] .pdfbook__page--right {
  border-left: 0;
  border-radius: 5px;
}

.pdfbook__controls {
  align-items: center;
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 0.85rem;
}

.pdfbook__button {
  align-items: center;
  background: #1f2937;
  border: 1px solid #1f2937;
  border-radius: 8px;
  color: #ffffff;
  cursor: pointer;
  display: inline-flex;
  font-size: 1.4rem;
  height: 2.5rem;
  justify-content: center;
  line-height: 1;
  min-width: 2.5rem;
  padding: 0;
}

.pdfbook__button:hover,
.pdfbook__button:focus {
  background: #374151;
  border-color: #374151;
}

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

.pdfbook__status {
  color: var(--pdfbook-muted);
  font-variant-numeric: tabular-nums;
  min-width: 5.5rem;
  text-align: center;
}

@keyframes pdfbook-next {
  0% {
    filter: brightness(1);
    transform: rotateY(0deg);
  }

  45% {
    filter: brightness(0.92);
  }

  100% {
    filter: brightness(0.78);
    transform: rotateY(-162deg);
  }
}

@keyframes pdfbook-prev {
  0% {
    filter: brightness(1);
    transform: rotateY(0deg);
  }

  45% {
    filter: brightness(0.92);
  }

  100% {
    filter: brightness(0.78);
    transform: rotateY(162deg);
  }
}

@media (max-width: 720px) {
  .pdfbook__stage {
    height: min(var(--pdfbook-height), 78vh);
    max-height: 78vh;
    min-height: 360px;
  }

  .pdfbook__picker {
    align-items: stretch;
    flex-direction: column;
  }

  .pdfbook__select {
    flex-basis: auto;
    max-width: none;
    width: 100%;
  }

  .pdfbook__page--left {
    display: none;
  }

  .pdfbook__page,
  .pdfbook__turn {
    max-width: min(100%, 760px);
  }

  .pdfbook__page--right {
    border-left: 0;
    border-radius: 5px;
  }

  .pdfbook__controls {
    flex-wrap: wrap;
  }
}