/* ============================================================
   bookshelf.css
   All styles scoped to .bs-section so they never bleed into
   the rest of the portfolio.  Prefix: bs-
   ============================================================ */

/* ── Section shell ─────────────────────────────────────────── */
.bs-section {
  --bs-bg: #150c06;
  --bs-fg: #ede8df;
  --bs-mid: rgba(237, 232, 223, 0.45);
  --bs-dim: rgba(237, 232, 223, 0.18);

  background: var(--bs-bg);
  color: var(--bs-fg);
  font-family: "Inter", "Helvetica Neue", sans-serif;
  width: 100%;
  padding: 64px 24px 72px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  box-sizing: border-box;
}

/* Hide the raw SVG defs element */
.bs-svg-defs {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
  pointer-events: none;
}

/* ── Section heading ──────────────────────────────────────── */
.bs-heading {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  width: min(860px, calc(100vw - 80px));
  margin-bottom: 36px;
  gap: 6px;
}

.bs-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 3.5px;
  text-transform: uppercase;
  color: var(--bs-fg);
  opacity: 0.9;
}

.bs-sublabel {
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--bs-mid);
}

/* ── Scene ─────────────────────────────────────────────────── */
.bs-scene {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

/* ── Shelf wrap (column: outer → plank) ────────────────────── */
.bs-shelf-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: min(860px, calc(100vw - 80px));
}

/* ── Outer container — sets the visible clipping width ─────── */
.bs-shelf-outer {
  position: relative;
  width: 100%;
}

/* ── Viewport — clips overflowing books ────────────────────── */
.bs-viewport {
  overflow: hidden;
  padding-top: 22px; /* headroom for leaned book tops */
}

/* ── Books row — full scrollable width ─────────────────────── */
.bs-books-row {
  display: flex;
  align-items: flex-end;
  gap: 20px;
  width: max-content;
  will-change: transform;
}

/* ── Shelf plank ───────────────────────────────────────────── */
.bs-plank {
  width: calc(100% + 80px);
  margin-left: -40px;
  height: 6px;
  background: var(--bs-fg);
  opacity: 0.15;
  border-radius: 1px;
}

/* ── Scroll arrows ─────────────────────────────────────────── */
.bs-arrow {
  position: absolute;
  top: 50%;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #522b12;
  border: 1px solid #522b12;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  color: #f5f3ea;
  opacity: 0;
  pointer-events: none;
  transition:
    background 0.2s,
    opacity 0.3s;
}

.bs-arrow:hover {
  background: #265721;
  border: none;
}

.bs-arrow-left {
  left: -18px;
}
.bs-arrow-right {
  right: -18px;
}

.bs-arrow.visible {
  opacity: 1;
  pointer-events: all;
}

/* ── Book wrap — carries the organic lean ──────────────────── */
.bs-book-wrap {
  flex-shrink: 0;
  transform-origin: bottom center;
  transition: transform 500ms ease;
  padding: 8px;
  margin: -8px;
}
.bs-book-wrap.open {
  transform: rotateZ(0deg) !important;
}

/* ── Book button (perspective container) ───────────────────── */
.bs-book-btn {
  display: flex;
  flex-direction: row;
  align-items: flex-end;
  justify-content: flex-start;
  flex-shrink: 0;
  outline: none;
  border: none;
  background: none;
  padding: 0;
  cursor: pointer;
  gap: 0;
  transition: width 500ms ease;
  will-change: auto;
  /* perspective set via inline style in JS */
}

.bs-book-btn:focus,
.bs-book-btn:focus-visible,
.bs-book-btn:active,
.bs-book-btn:hover {
  transform: translate(0px, -2px);
  transition: 200ms ease;
  outline: none;
  background: none;
}

/* ── Spine ─────────────────────────────────────────────────── */
.bs-spine {
  flex-shrink: 0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  overflow: hidden;
  position: relative;

  transform-origin: right center;
  transform: rotateY(0deg);
  transition: all 500ms ease;
  will-change: auto;
  filter: brightness(0.8) contrast(2);
  transform-style: preserve-3d;
}

/* ── Cover ─────────────────────────────────────────────────── */
.bs-cover {
  flex-shrink: 0;
  overflow: hidden;
  position: relative;

  transform-origin: left center;
  transform: rotateY(88.8deg);
  transition: all 500ms ease;
  will-change: auto;
  filter: brightness(0.8) contrast(2);
  transform-style: preserve-3d;
}

/* Open animation — Adam Maj hinge */
.bs-book-btn.open .bs-spine {
  transform: rotateY(-60deg);
}
.bs-book-btn.open .bs-cover {
  transform: rotateY(30deg);
}

/* ── Paper texture overlay ─────────────────────────────────── */
.bs-paper-tex {
  pointer-events: none;
  position: absolute;
  inset: 0;
  opacity: 0.28;
  filter: url(#bs-paper);
  z-index: 10;
  background: white;
}

/* ── Binding highlight ─────────────────────────────────────── */
.bs-binding {
  pointer-events: none;
  position: absolute;
  inset: 0;
  z-index: 5;
  background: linear-gradient(
    to right,
    rgba(255, 255, 255, 0) 2px,
    rgba(255, 255, 255, 0.5) 3px,
    rgba(255, 255, 255, 0.25) 4px,
    rgba(255, 255, 255, 0.25) 6px,
    transparent 7px,
    transparent 9px,
    rgba(255, 255, 255, 0.25) 9px,
    transparent 12px
  );
}

/* ── Spine title text ──────────────────────────────────────── */
.bs-spine-title {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  white-space: nowrap;
  overflow: hidden;
  user-select: none;
  margin-top: 12px;
  font-family: "Inter", "Helvetica Neue", sans-serif;
}

/* Cover SVG / img fills its container */
.bs-cover svg,
.bs-cover img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}
.bs-cover img {
  object-fit: cover;
}

/* ── Navigation dots ───────────────────────────────────────── */
.bs-dots {
  display: flex;
  gap: 7px;
  margin-top: 20px;
}

.bs-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--bs-dim);
  cursor: pointer;
  transition:
    background 0.3s,
    transform 0.3s;
}
.bs-dot.active {
  background: var(--bs-fg);
  transform: scale(1.5);
}

/* ── Review card area ──────────────────────────────────────── */
.bs-review {
  position: relative;
  width: min(520px, calc(100vw - 80px));
  min-height: 180px;
  margin-top: 32px;
}

.bs-review-empty {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--bs-dim);
  transition: opacity 0.4s;
}

/* Individual review card */
.bs-card {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  transition:
    opacity 0.38s ease,
    transform 0.38s ease;
}
.bs-card.hidden {
  opacity: 0;
  pointer-events: none;
}
.bs-card.exit-l {
  opacity: 0;
  transform: translateX(-20px);
}
.bs-card.exit-r {
  opacity: 0;
  transform: translateX(20px);
}
.bs-card.enter-l {
  opacity: 0;
  transform: translateX(20px);
}
.bs-card.enter-r {
  opacity: 0;
  transform: translateX(-20px);
}
.bs-card.visible {
  opacity: 1;
  transform: translateX(0);
}

.bs-card-genre {
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--bs-mid);
  margin-bottom: 8px;
}

.bs-card-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--bs-fg);
  line-height: 1.15;
  margin-bottom: 0;
  max-width: 460px;
  font-family: "Libre Baskerville", Georgia, serif;
  font-style: italic;
}

.bs-card-rule {
  width: 100%;
  height: 1px;
  background: var(--bs-fg);
  opacity: 0.2;
  margin: 10px 0;
}

.bs-card-byline {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--bs-mid);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.bs-stars {
  display: flex;
  gap: 3px;
}
.bs-star {
  font-size: 11px;
}
.bs-star.on {
  color: var(--bs-fg);
}
.bs-star.off {
  color: var(--bs-dim);
}

.bs-card-thoughts {
  font-size: 13px;
  line-height: 1.85;
  color: var(--bs-mid);
  max-width: 460px;
  font-family: "Manrope", sans-serif;
  font-style: normal;
}