/* Boeken: een draaibaar 3D-boek, een plank met titels en een citaat. */

.books {
  background:
    radial-gradient(50% 60% at 18% 40%, oklch(0.45 0.14 150 / 0.18), transparent 70%),
    var(--night-900);
}

.shelf {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-l);
}

.shelf[hidden] {
  display: none;
}

.shelf__item {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  min-height: var(--tap-min);
  padding: 0.35rem 1rem 0.35rem 0.35rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  background: var(--night-850);
  font-family: var(--font-display);
  font-weight: 650;
  font-stretch: 105%;
  transition: border-color var(--duration-base) var(--ease-out), background-color var(--duration-base) var(--ease-out), color var(--duration-base) var(--ease-out);
}

.shelf__item img {
  width: 1.9rem;
  height: 2.6rem;
  object-fit: cover;
  border-radius: 3px;
}

.shelf__item:hover {
  border-color: var(--amber);
}

.shelf__item[aria-selected='true'] {
  background: var(--paper);
  color: var(--night-950);
  border-color: var(--paper);
}

.books__panels {
  display: grid;
  gap: var(--space-2xl);
}

.js .books__panels {
  gap: 0;
}

.js .book[data-inactive] {
  display: none;
}

.book {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  align-items: center;
  gap: var(--space-xl);
}

.js-motion .book:not([data-inactive]) .book__info {
  animation: book-info-in 600ms var(--ease-out);
}

@keyframes book-info-in {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
}

/* ---------- 3D-boek ---------- */

.book__stage {
  display: grid;
  place-items: center;
  min-height: clamp(24rem, 40vw, 36rem);
  perspective: 1600px;
  position: relative;
}

.book__stage::after {
  content: '';
  position: absolute;
  bottom: 4%;
  left: 50%;
  width: 60%;
  height: 2.6rem;
  border-radius: 50%;
  background: radial-gradient(closest-side, oklch(0.04 0.02 278 / 0.85), transparent);
  transform: translateX(-50%);
  z-index: -1;
}

.book3d {
  --book-w: clamp(13rem, 20vw, 19rem);
  --book-h: calc(var(--book-w) * 1.5);
  --book-d: calc(var(--book-w) * 0.13);
  width: var(--book-w);
  height: var(--book-h);
  cursor: grab;
  touch-action: pan-y;
}

.book3d:active {
  cursor: grabbing;
}

.book3d__body {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transform: rotateX(var(--tilt-x, 4deg)) rotateY(var(--tilt-y, 32deg));
  transition: transform 900ms var(--ease-out);
}

.book3d.is-dragging .book3d__body {
  transition: none;
}

.book3d__cover,
.book3d__spine,
.book3d__pages,
.book3d__back {
  position: absolute;
  backface-visibility: hidden;
}

.book3d__cover {
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 2px 5px 5px 2px;
  transform: translateZ(calc(var(--book-d) / 2));
  box-shadow: inset 4px 0 8px oklch(0 0 0 / 0.25);
}

/* Glanslijn over de kaft, beweegt mee met de draaiing */
.book3d__body::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 2px 5px 5px 2px;
  background: linear-gradient(105deg, transparent 35%, oklch(1 0 0 / 0.22) 48%, transparent 60%);
  background-size: 250% 100%;
  background-position: var(--sheen, 60%) 0;
  transform: translateZ(calc(var(--book-d) / 2 + 1px));
  pointer-events: none;
}

.book3d__spine {
  top: 0;
  left: calc(var(--book-d) / -2);
  width: var(--book-d);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  writing-mode: vertical-rl;
  background: var(--spine, oklch(0.5 0.12 150));
  color: oklch(0.98 0.01 90);
  font-family: var(--font-display);
  font-weight: 800;
  font-stretch: 90%;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  transform: rotateY(-90deg);
  box-shadow: inset -6px 0 10px oklch(0 0 0 / 0.25), inset 4px 0 6px oklch(1 0 0 / 0.12);
}

.book3d__pages {
  top: 3px;
  right: calc(var(--book-d) / -2 + 2px);
  width: calc(var(--book-d) - 4px);
  height: calc(100% - 6px);
  background: repeating-linear-gradient(90deg, oklch(0.95 0.01 90) 0 1px, oklch(0.86 0.01 90) 1px 2px);
  transform: rotateY(90deg);
}

.book3d__back {
  inset: 0;
  background: var(--spine, oklch(0.5 0.12 150));
  border-radius: 5px 2px 2px 5px;
  transform: rotateY(180deg) translateZ(calc(var(--book-d) / 2));
}

/* ---------- Info ---------- */

.book__info {
  display: grid;
  gap: var(--space-s);
  justify-items: start;
}

.book__lang {
  display: inline-grid;
  place-items: center;
  min-width: 2.6rem;
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-s);
  background: var(--sunset);
  color: var(--night-950);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--step--1);
  letter-spacing: 0.08em;
}

.book__title {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-stretch: 135%;
  font-size: var(--step-4);
  line-height: 0.95;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.book__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.book__facts li {
  padding: 0.2rem 0.75rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  font-size: var(--step--1);
  color: var(--paper-dim);
}

.book__text {
  max-width: 60ch;
  color: var(--paper-dim);
}

.book__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-2xs);
}

.book__soldout {
  align-self: center;
  margin-right: var(--space-s);
  font-family: var(--font-display);
  font-weight: 700;
  font-stretch: 80%;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--sunset);
}

.books__hint {
  display: none;
}

.js .books__hint {
  display: block;
  margin-top: var(--space-xs);
  font-size: var(--step--1);
  color: var(--paper-faint);
}

/* ---------- Citaat ---------- */

.pull-quote {
  display: grid;
  gap: var(--space-s);
  margin-top: var(--space-2xl);
  padding-top: var(--space-l);
  border-top: 1px solid var(--line);
}

.pull-quote p {
  max-width: 22ch;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 700;
  font-stretch: 120%;
  font-size: var(--step-3);
  line-height: 1.1;
  color: var(--amber);
  text-shadow: 0 0 40px var(--amber-glow);
}

.pull-quote footer {
  color: var(--paper-faint);
  font-size: var(--step--1);
}

/* ---------- Responsief ---------- */

@media (max-width: 980px) {
  .book {
    grid-template-columns: 1fr;
    gap: var(--space-l);
  }

  .book__stage {
    min-height: auto;
    padding-block: var(--space-m);
  }
}

@media (max-width: 640px) {
  .book3d {
    --book-w: min(56vw, 14rem);
  }

  .shelf__item {
    flex: 1 1 auto;
    justify-content: flex-start;
  }
}

@media (max-width: 420px) {
  .shelf {
    display: grid;
  }

  .book__actions {
    width: 100%;
  }
}