.bilderbuch-einstieg {
  padding: 54px 0 18px;
}
.bilderbuch-einleitung {
  width: 100%;
  max-width: none;
  padding: clamp(26px, 4vw, 44px);
  border: 1px solid var(--color-border);
  border-radius: 18px;
  background:
    radial-gradient(circle at 93% 12%, rgba(31, 61, 43, .09), transparent 27%),
    rgba(255, 255, 255, .78);
}
.bilderbuch-einleitung > :last-child {
  margin-bottom: 0;
}

.bilderbuch-bereich {
  padding: 42px 0 105px;
}
.bilderbuch-bereich-kopf {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 28px;
}
.bilderbuch-bereich-kopf h2 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1;
}
.bilderbuch-kicker {
  display: block;
  margin-bottom: 9px;
  color: var(--color-primary);
  font-size: .73rem;
  font-weight: 800;
  letter-spacing: .13em;
  text-transform: uppercase;
}
.bilderbuch-download {
  flex: 0 0 auto;
  border-color: var(--color-primary);
  background: transparent;
  color: var(--color-primary);
}
.bilderbuch-download:hover {
  background: var(--color-primary);
  color: #fff;
  text-decoration: none;
}

.bilderbuch-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: clamp(24px, 3vw, 38px);
  align-items: stretch;
}
.bilderbuch-viewer {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 20px 55px rgba(22, 41, 29, .11);
}
.bilderbuch-werkzeugleiste {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 61px;
  padding: 10px 14px 10px 20px;
  border-bottom: 1px solid var(--color-border);
  background: #fff;
}
.bilderbuch-seitenstand {
  color: var(--color-text-muted);
  font-size: .82rem;
}
.bilderbuch-seitenstand strong {
  color: var(--color-primary);
  font-size: 1rem;
}
.bilderbuch-werkzeuge {
  display: flex;
  gap: 5px;
}
.bilderbuch-werkzeug {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 39px;
  padding: 7px 11px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: var(--color-primary);
  font: inherit;
  font-size: .78rem;
  font-weight: 750;
  cursor: pointer;
}
.bilderbuch-werkzeug:hover,
.bilderbuch-werkzeug[aria-pressed="true"] {
  border-color: var(--color-border);
  background: var(--color-bg-alt);
}
.bilderbuch-werkzeug i {
  font-size: 1.18rem;
}

.bilderbuch-buehne {
  position: relative;
  padding: clamp(12px, 2vw, 22px) clamp(48px, 6vw, 76px);
  background:
    radial-gradient(circle at 50% 30%, rgba(255, 255, 255, .1), transparent 50%),
    var(--color-primary);
}
.bilderbuch-bildrahmen {
  position: relative;
  overflow: auto;
  aspect-ratio: 2600 / 1710;
  border: 1px solid rgba(255, 255, 255, .3);
  border-radius: 4px;
  background: #d8d0b8;
  box-shadow: 0 18px 38px rgba(0, 0, 0, .25);
  scrollbar-color: var(--color-primary) rgba(255, 255, 255, .4);
}
.bilderbuch-bildflaeche {
  position: relative;
  width: 100%;
  min-width: 100%;
  min-height: 100%;
  transform-style: preserve-3d;
  transition: width .22s ease;
}
.bilderbuch-bildrahmen.is-zoomed .bilderbuch-bildflaeche {
  width: 165%;
}
.bilderbuch-bild {
  width: 100%;
  height: auto;
  max-width: none;
  background: #d8d0b8;
  user-select: none;
  -webkit-user-drag: none;
}
.bilderbuch-bild--aktuell {
  position: relative;
  z-index: 2;
}
.bilderbuch-bild--wechsel {
  position: absolute;
  z-index: 1;
  inset: 0;
  opacity: 0;
}
.bilderbuch-bildflaeche.is-wechsel-vor .bilderbuch-bild--wechsel,
.bilderbuch-bildflaeche.is-wechsel-zurueck .bilderbuch-bild--wechsel {
  opacity: 1;
}
.bilderbuch-bildflaeche.is-wechsel-vor .bilderbuch-bild--aktuell {
  transform-origin: left center;
  animation: bilderbuch-blaettern-vor .46s cubic-bezier(.65, .05, .35, 1) both;
}
.bilderbuch-bildflaeche.is-wechsel-zurueck .bilderbuch-bild--aktuell {
  transform-origin: right center;
  animation: bilderbuch-blaettern-zurueck .46s cubic-bezier(.65, .05, .35, 1) both;
}
.bilderbuch-falz {
  position: absolute;
  z-index: 3;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 18px;
  background: linear-gradient(90deg, transparent, rgba(0, 0, 0, .23), rgba(255, 255, 255, .2), transparent);
  transform: translateX(-50%);
  pointer-events: none;
}

@keyframes bilderbuch-blaettern-vor {
  0% {
    opacity: 1;
    transform: perspective(1500px) rotateY(0);
  }
  100% {
    opacity: 0;
    transform: perspective(1500px) rotateY(-72deg);
  }
}
@keyframes bilderbuch-blaettern-zurueck {
  0% {
    opacity: 1;
    transform: perspective(1500px) rotateY(0);
  }
  100% {
    opacity: 0;
    transform: perspective(1500px) rotateY(72deg);
  }
}

.bilderbuch-pfeil {
  position: absolute;
  z-index: 5;
  top: 50%;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, .45);
  border-radius: 50%;
  background: rgba(255, 255, 255, .94);
  color: var(--color-primary);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .2);
  transform: translateY(-50%);
  cursor: pointer;
}
.bilderbuch-pfeil:hover:not(:disabled) {
  background: var(--color-beige);
}
.bilderbuch-pfeil:disabled {
  opacity: .34;
  cursor: not-allowed;
}
.bilderbuch-pfeil i {
  font-size: 1.3rem;
}
.bilderbuch-pfeil--zurueck {
  left: 12px;
}
.bilderbuch-pfeil--weiter {
  right: 12px;
}

.bilderbuch-navigation {
  display: grid;
  grid-template-columns: minmax(160px, 1fr) auto;
  gap: 18px;
  align-items: center;
  padding: 15px 20px 18px;
  border-top: 1px solid var(--color-border);
  background: #fff;
}
.bilderbuch-navigation input[type="range"] {
  width: 100%;
  accent-color: var(--color-primary);
  cursor: pointer;
}
.bilderbuch-navigation span {
  color: var(--color-text-muted);
  font-size: .72rem;
}

.bilderbuch-beschreibung {
  min-width: 0;
  padding: 30px 28px;
  border: 0;
  border-top: 5px solid var(--color-primary);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  background: #fff;
  box-shadow: 0 16px 40px rgba(31, 61, 43, .09);
}
.bilderbuch-beschreibung-kicker {
  display: block;
  margin-bottom: 9px;
  color: var(--color-primary);
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.bilderbuch-beschreibung h3 {
  margin-bottom: 17px;
  color: var(--color-primary);
  font-size: clamp(1.3rem, 2vw, 1.68rem);
  line-height: 1.15;
}
.bilderbuch-beschreibung .page-content {
  font-size: .94rem;
}
.bilderbuch-beschreibung .page-content > :last-child {
  margin-bottom: 0;
}
.bilderbuch-beschreibung-hinweis {
  display: flex;
  gap: 9px;
  align-items: flex-start;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: .76rem;
  line-height: 1.45;
}
.bilderbuch-beschreibung-hinweis i {
  flex: 0 0 auto;
  margin-top: 1px;
  color: var(--color-primary);
  font-size: 1rem;
}

.bilderbuch-leer {
  max-width: 720px;
  margin: 20px auto;
  padding: 58px;
  border: 1px solid var(--color-border);
  border-radius: 18px;
  background: rgba(255, 255, 255, .76);
  text-align: center;
}
.bilderbuch-leer i {
  color: var(--color-primary);
  font-size: 2.5rem;
}
.bilderbuch-leer p {
  margin-right: auto;
  margin-left: auto;
}

.bilderbuch-layout:fullscreen {
  overflow: auto;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 24px;
  width: 100%;
  height: 100%;
  padding: 24px;
  background: var(--color-beige);
}
.bilderbuch-layout:fullscreen .bilderbuch-viewer,
.bilderbuch-layout:fullscreen .bilderbuch-beschreibung {
  align-self: center;
}

@media (max-width: 980px) {
  .bilderbuch-layout {
    grid-template-columns: 1fr;
  }
  .bilderbuch-beschreibung {
    min-height: 220px;
  }
  .bilderbuch-layout:fullscreen {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .bilderbuch-einstieg {
    padding-top: 32px;
  }
  .bilderbuch-bereich {
    padding-top: 30px;
  }
  .bilderbuch-bereich-kopf {
    align-items: flex-start;
    flex-direction: column;
  }
  .bilderbuch-werkzeug span {
    position: absolute;
    overflow: hidden;
    width: 1px;
    height: 1px;
    clip: rect(0, 0, 0, 0);
  }
  .bilderbuch-buehne {
    padding: 12px 38px;
  }
  .bilderbuch-pfeil {
    width: 38px;
    height: 38px;
  }
  .bilderbuch-pfeil--zurueck {
    left: 3px;
  }
  .bilderbuch-pfeil--weiter {
    right: 3px;
  }
  .bilderbuch-navigation {
    grid-template-columns: 1fr;
    gap: 6px;
  }
  .bilderbuch-navigation span {
    text-align: center;
  }
  .bilderbuch-beschreibung {
    padding: 26px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .bilderbuch-bildflaeche,
  .bilderbuch-bild--aktuell {
    transition: none;
    animation: none !important;
  }
}