/* The book page: /book/. Builds on style.css (tokens, nav, footer, .btn, .textlink, .reveal). */

.bk { --paper: #f4f0e8; --paper-ink: #2a2620; --paper-mute: #8b8478; overflow-x: clip; }
.bk h2 { font: 300 clamp(36px, 5vw, 64px)/1.02 var(--serif); margin: 0 0 18px; letter-spacing: -.01em; }

/* ── Hero: the book as an object ── */
/* Centred and symmetrical, like the rest of the site: the book, then the words beneath it */
.bk-hero { display: flex; flex-direction: column; align-items: center; text-align: center;
  padding: clamp(110px, 15vh, 150px) var(--gut) clamp(70px, 11vh, 120px);
  background: radial-gradient(ellipse 60% 55% at 50% 34%, #24201a 0%, var(--ink) 70%); }
.bk-object { position: relative; perspective: 2400px; perspective-origin: 50% 40%; display: grid; place-items: center; padding: 6vh 0 9vh; }
/* A hardcover built from real parts: two boards that overhang the page block by 3 mm, a spine, and the page block.
   --w/--h/--d are the closed book (305 × 216 × 18 mm); --o is the board overhang, --t the board thickness.
   book.js turns it (--ry/--rx) and lights each face (--l-*) every frame. */
.bk-3d { --w: min(560px, 70vw, 62svh); --h: calc(var(--w) * 216 / 305); --d: calc(var(--w) * 20 / 305);
  --o: calc(var(--w) * 3 / 305); --t: calc(var(--w) * 2.6 / 305);
  position: relative; width: var(--w); height: var(--h); transform-style: preserve-3d; will-change: transform;
  transform: rotateX(var(--rx, 6deg)) rotateY(var(--ry, 24deg)); }
.bk-3d .f { position: absolute; left: 50%; top: 50%; backface-visibility: hidden; -webkit-backface-visibility: hidden; }
.bk-3d .f .light { position: absolute; inset: 0; pointer-events: none; }

/* front and back boards */
.bk-3d .front, .bk-3d .back { width: var(--w); height: var(--h); margin: calc(var(--h) / -2) 0 0 calc(var(--w) / -2); }
.bk-3d .front { transform: translateZ(calc(var(--d) / 2)); overflow: hidden; border-radius: 0 2px 2px 0; container-type: inline-size; }
.bk-3d .front img { width: 100%; height: 100%; object-fit: cover; display: block; max-width: none; }
.bk-3d .front .hinge { position: absolute; top: 0; bottom: 0; left: 2.6%; width: 1.6%; pointer-events: none;
  background: linear-gradient(90deg, rgba(0,0,0,.28), rgba(255,255,255,.16) 45%, rgba(0,0,0,.12) 70%, transparent); }
.bk-3d .front .light { background:
  linear-gradient(100deg, transparent calc(var(--sheen, 40%) - 22%), rgba(255,255,255,.16) var(--sheen, 40%), transparent calc(var(--sheen, 40%) + 22%)),
  linear-gradient(90deg, rgba(0,0,0,.22), transparent 6%),
  rgba(0,0,0,var(--l-front, 0)); }
.lockup { position: absolute; left: 8%; top: 9%; display: flex; flex-direction: column; align-items: flex-start; color: #1d2733; }
.lockup b { font: 300 13cqw/1 var(--serif); margin-bottom: 1.5cqw; }
.lockup span { display: block; font: 2cqw var(--mono); text-transform: uppercase; white-space: nowrap; }
.bk-3d .back { transform: rotateY(180deg) translateZ(calc(var(--d) / 2)); background: #0d0c0a; }
.bk-3d .back .light { background: rgba(0,0,0,var(--l-back, .3)); }

/* spine: wrapped cloth-dark board, slightly rounded by its shading */
.bk-3d .spine { width: var(--d); height: var(--h); margin: calc(var(--h) / -2) 0 0 calc(var(--d) / -2);
  transform: translateX(calc(var(--w) / -2)) rotateY(-90deg);
  background: linear-gradient(90deg, #070605 0%, #1c1a15 22%, #2a2620 50%, #1c1a15 78%, #070605 100%);
  display: flex; align-items: center; justify-content: center; color: var(--bone); border-radius: 2px; overflow: hidden; }
.bk-3d .spine span { position: relative; z-index: 1; writing-mode: vertical-rl; font: calc(var(--d) * .26) var(--mono); letter-spacing: .32em; text-transform: uppercase; white-space: nowrap; }
.bk-3d .spine b { font: 300 calc(var(--d) * .46) var(--serif); letter-spacing: .04em; text-transform: none; margin-inline-end: calc(var(--d) * 1.3); }
.bk-3d .spine .light { z-index: 2; background: rgba(0,0,0,var(--l-spine, .4)); }

/* board edges: the thickness you see where the boards overhang the pages */
.bk-3d .board { background: linear-gradient(90deg, #11100d, #26231d); }
.bk-3d .fr, .bk-3d .br { width: var(--t); height: var(--h); margin: calc(var(--h) / -2) 0 0 calc(var(--t) / -2); }
.bk-3d .fr { transform: translateX(calc(var(--w) / 2)) translateZ(calc(var(--d) / 2 - var(--t) / 2)) rotateY(90deg); }
.bk-3d .br { transform: translateX(calc(var(--w) / 2)) translateZ(calc(var(--d) / -2 + var(--t) / 2)) rotateY(90deg); }
.bk-3d .ft, .bk-3d .fb, .bk-3d .bt, .bk-3d .bb { width: var(--w); height: var(--t); margin: calc(var(--t) / -2) 0 0 calc(var(--w) / -2); }
.bk-3d .ft { transform: translateY(calc(var(--h) / -2)) translateZ(calc(var(--d) / 2 - var(--t) / 2)) rotateX(90deg); }
.bk-3d .bt { transform: translateY(calc(var(--h) / -2)) translateZ(calc(var(--d) / -2 + var(--t) / 2)) rotateX(90deg); }
.bk-3d .fb { transform: translateY(calc(var(--h) / 2)) translateZ(calc(var(--d) / 2 - var(--t) / 2)) rotateX(-90deg); }
.bk-3d .bb { transform: translateY(calc(var(--h) / 2)) translateZ(calc(var(--d) / -2 + var(--t) / 2)) rotateX(-90deg); }

/* page block, set in from the board edges */
.bk-3d .block { background-color: #efe9dd; }
.bk-3d .block.side { width: calc(var(--d) - 2 * var(--t)); height: calc(var(--h) - 2 * var(--o));
  margin: calc((var(--h) - 2 * var(--o)) / -2) 0 0 calc((var(--d) - 2 * var(--t)) / -2);
  transform: translateX(calc(var(--w) / 2 - var(--o))) rotateY(90deg);
  background-image: repeating-linear-gradient(90deg, rgba(0,0,0,.07) 0 1px, transparent 1px 2.4px),
    linear-gradient(90deg, rgba(0,0,0,.18), transparent 18%, transparent 82%, rgba(0,0,0,.18)); }
.bk-3d .block.top, .bk-3d .block.bottom { width: calc(var(--w) - var(--o)); height: calc(var(--d) - 2 * var(--t));
  margin: calc((var(--d) - 2 * var(--t)) / -2) 0 0 calc((var(--w) - var(--o)) / -2);
  background-image: repeating-linear-gradient(0deg, rgba(0,0,0,.07) 0 1px, transparent 1px 2.4px),
    linear-gradient(0deg, rgba(0,0,0,.16), transparent 20%, transparent 80%, rgba(0,0,0,.16)); }
.bk-3d .block.top { transform: translateX(calc(var(--o) / -2)) translateY(calc(var(--h) / -2 + var(--o))) rotateX(90deg); }
.bk-3d .block.bottom { transform: translateX(calc(var(--o) / -2)) translateY(calc(var(--h) / 2 - var(--o))) rotateX(-90deg); }
.bk-3d .block.side .light { background: rgba(0,0,0,var(--l-edge, .3)); }
.bk-3d .block.top .light { background: rgba(255,255,255,.12); }

.bk-shadow { position: absolute; left: 50%; bottom: 3vh; width: calc(min(560px, 70vw, 62svh) * .95); height: 46px;
  transform: translateX(calc(-50% + var(--sx, 0px))) scaleX(var(--ss, 1));
  background: radial-gradient(ellipse at center, rgba(0,0,0,.7), rgba(0,0,0,.25) 45%, transparent 70%); filter: blur(10px); z-index: -1; }

.bk-hero-text { max-width: 34rem; display: flex; flex-direction: column; align-items: center; }
.bk-hero-text h1 { font: 300 clamp(64px, 9vw, 132px)/.92 var(--serif); margin: 0 0 18px; letter-spacing: -.02em; }
.bk-defn { font: italic 400 clamp(19px, 1.6vw, 23px)/1.4 var(--text); color: var(--bone-dim); margin: 0 0 28px; }
.bk-lede { font: 400 clamp(17px, 1.35vw, 19px)/1.65 var(--text); color: var(--bone); margin: 0 0 26px; }
.bk-facts { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 18px; color: var(--bone-dim); margin: 0 0 34px; }
.bk-facts span + span::before { content: "·"; margin-right: 18px; color: var(--ember); }
.bk-buy { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 18px 26px; }
.bk-price { font: 300 44px/1 var(--serif); margin: 0; }
.bk-ship { color: var(--mute); margin: 22px 0 0; }

/* ── Open-book pages (showcase and viewer share these) ── */
.bk-open { --pw: 1; display: flex; justify-content: center; filter: drop-shadow(0 28px 40px rgba(0,0,0,.6)) drop-shadow(0 3px 6px rgba(0,0,0,.4)); }
.pg { position: relative; flex: none; width: var(--pw-px); aspect-ratio: 297 / 210; background: var(--paper); color: var(--paper-ink);
  overflow: hidden; container-type: size; }
.pg.empty { visibility: hidden; }
.pg.l::after, .pg.r::after { content: ""; position: absolute; top: 0; bottom: 0; width: 8%; pointer-events: none; z-index: 2; }
.pg.l::after { right: 0; background: linear-gradient(to left, rgba(0,0,0,.24), transparent); }
.pg.r::after { left: 0; background: linear-gradient(to right, rgba(0,0,0,.24), transparent); }
.pg .spread-img { position: absolute; inset: 0; width: 200%; max-width: none; height: 100%; object-fit: cover; }
.pg.r .spread-img { left: -100%; }
.pg .bleed img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.pg .one, .pg .two { position: absolute; inset: 9%; display: flex; gap: 4%; align-items: center; justify-content: center; }
.pg figure { margin: 0; height: 100%; width: 100%; min-width: 0; display: grid; grid-template-rows: minmax(0, 1fr) auto; place-items: center; }
.pg .two figure { flex: 1; }
.pg figure img { max-width: 100%; max-height: 100%; width: auto; height: auto; object-fit: contain; display: block; }
.pg figcaption { margin-top: 2.2cqh; text-align: center; }
.pg .cap { font: 1.6cqh var(--mono); letter-spacing: .18em; text-transform: uppercase; color: var(--paper-ink); }
.pg .over-cap { position: absolute; left: 4%; bottom: 4%; z-index: 3; margin: 0; text-align: left; }
.pg .over-cap .cap { color: #fff; text-shadow: 0 1px 8px rgba(0,0,0,.7); }
.pg.l .over-cap.on-r, .pg.r .over-cap.on-l { display: none; }
.pg .fno { position: absolute; bottom: 3.6%; font: 1.6cqh var(--mono); color: var(--paper-mute); letter-spacing: .08em; }
.pg.l .fno { left: 6%; } .pg.r .fno { right: 6%; }
.pg .type { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 14%; }
.pg .kicker { font: 1.8cqh var(--mono); letter-spacing: .3em; text-transform: uppercase; color: var(--paper-mute); }
.pg .type h2 { font: 300 9cqh/1 var(--serif); margin: 3cqh 0; }
.pg .type h3 { font: 300 6.4cqh/1.05 var(--serif); margin: 2.4cqh 0; }
.pg .type p { font: italic 3cqh/1.4 var(--text); color: #5d574d; margin: 0; max-width: 30ch; }
.pg .numeral { font: 300 14cqh/1 var(--serif); color: var(--ember); }
.pg .essay { position: absolute; inset: 11% 13%; display: flex; flex-direction: column; justify-content: center; }
.pg .essay .kicker { font-size: 1.7cqh; letter-spacing: .25em; }
.pg .essay h3 { font: 300 6cqh/1.05 var(--serif); margin: 2cqh 0 3cqh; }
.pg .essay p { font: 2.75cqh/1.5 var(--text); margin: 0 0 1.6cqh; text-wrap: pretty; }
.pg .essay .sc { font-variant: small-caps; letter-spacing: .08em; color: var(--ember); }
.pg .essay .welcome { font: italic 300 6cqh/1 var(--serif); margin-top: 2cqh; }
.pg .preface { inset: 18% 20%; }
.pg .preface .kicker { margin-bottom: 4cqh; }
.pg .preface p { font-size: 3cqh; }
.pg .preface .sign { font: 300 4.4cqh/1 var(--serif); margin-top: 2.4cqh; }
.pg .preface .aside { font: 1.6cqh var(--mono); letter-spacing: .12em; color: var(--paper-mute); }
.pg .doc { position: absolute; left: 50%; top: 46%; transform: translate(-50%, -50%) rotate(-2deg); width: min(74cqw, 118cqh);
  background: #e9e2d2; border-radius: 1.4cqh; padding: 2.6cqh 3cqh 2cqh; box-shadow: 0 1.2cqh 3cqh rgba(0,0,0,.18); font-family: var(--mono); color: #3a352d; }
.pg .doc-head { display: flex; justify-content: space-between; font-size: 1.6cqh; letter-spacing: .14em; text-transform: uppercase; color: #6f685c;
  border-bottom: 1px solid rgba(0,0,0,.15); padding-bottom: 1.4cqh; }
.pg .doc-body { display: flex; gap: 3cqh; padding: 2.4cqh 0; }
.pg .doc-photo { width: 30%; flex: none; }
.pg .doc-photo img { width: 100%; display: block; filter: grayscale(1) contrast(1.05); }
.pg .doc dl { margin: 0; display: grid; gap: 1.1cqh; align-content: start; }
.pg .doc dt { font-size: 1.3cqh; letter-spacing: .14em; text-transform: uppercase; color: #8b8478; }
.pg .doc dd { margin: 0; font: 2.6cqh/1.1 var(--serif); }
.pg .doc-mrz { font-size: 1.5cqh; letter-spacing: .12em; color: #6f685c; word-break: break-all; border-top: 1px solid rgba(0,0,0,.15); padding-top: 1.4cqh; }
.pg .doc-stamp { position: absolute; right: 6%; bottom: 22%; transform: rotate(-12deg); border: .35cqh solid rgba(201,146,94,.8); color: rgba(201,146,94,.95);
  border-radius: 1cqh; padding: 1cqh 2cqh; text-align: center; font-size: 1.4cqh; letter-spacing: .14em; text-transform: uppercase; }
.pg .doc-stamp b { display: block; font: 300 3.2cqh/1.1 var(--serif); letter-spacing: 0; text-transform: none; }
.pg .doc-note { position: absolute; left: 0; right: 0; bottom: 8%; text-align: center; font: 1.5cqh var(--mono); letter-spacing: .12em; color: var(--paper-mute); }
.pg .toc { position: absolute; inset: 12% 16%; display: flex; flex-direction: column; justify-content: center; }
.pg .toc h3 { font: 300 5cqh/1 var(--serif); margin: 0 0 4cqh; }
.pg .toc ol { list-style: none; margin: 0; padding: 0; }
.pg .toc li { display: flex; gap: 1.6cqh; align-items: baseline; font: 3cqh/1.75 var(--serif); }
.pg .toc .n { font: 1.7cqh var(--mono); color: var(--ember); width: 5ch; letter-spacing: .08em; }
.pg .toc .dots, .pg .plates .dots { flex: 1; border-bottom: 1px dotted rgba(0,0,0,.22); transform: translateY(-.6cqh); }
.pg .toc .pg-n { font: 1.7cqh var(--mono); color: var(--paper-mute); }
.pg .toc li.sep { margin-top: 1.4cqh; }
.pg .copy { position: absolute; left: 12%; right: 12%; bottom: 12%; font: 1.55cqh/1.8 var(--mono); color: var(--paper-mute); letter-spacing: .04em; }
.pg .copy p { margin: 0 0 1.4cqh; }
.pg .copy .motto { text-transform: uppercase; letter-spacing: .18em; color: var(--paper-ink); margin-bottom: 3cqh; }
.pg .plates { position: absolute; inset: 9% 9% 11%; }
.pg .plates h3 { font: 300 5cqh/1 var(--serif); margin: 0 0 3cqh; }
.pg .plates ol { list-style: none; margin: 0; padding: 0; columns: 3; column-gap: 5%; }
.pg .plates li { display: flex; gap: 1.2cqh; align-items: baseline; font: 1.6cqh/1.95 var(--mono); letter-spacing: .04em; break-inside: avoid; }
.pg .plates .no, .pg .plates .pg-n { color: var(--paper-mute); }
.pg .plates .no { width: 4ch; }
.pg .plates .ring { color: var(--ember); }
.pg .plates .key { position: absolute; bottom: -5%; left: 0; font: 1.5cqh var(--mono); color: var(--paper-mute); letter-spacing: .06em; }

/* ── Showcase ── */
.bk-showcase { display: grid; gap: clamp(70px, 12vh, 140px); padding: 0 var(--gut) clamp(90px, 14vh, 160px); }
.bk-show { margin: 0; }
.bk-show figcaption { text-align: center; color: var(--mute); margin-top: 34px; }

/* ── Viewer ── */
.bk-inside, .bk-frames { padding: clamp(80px, 12vh, 140px) var(--gut); border-top: 1px solid var(--rule); }
.bk-inside-head { max-width: 36rem; margin: 0 auto clamp(40px, 6vh, 64px); text-align: center; }
.bk-inside-head p:last-child { color: var(--bone-dim); font: 17px/1.6 var(--text); margin: 0; }
.bk-viewer { position: relative; display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: clamp(8px, 2vw, 28px); outline: none; }
.bk-stage { min-width: 0; touch-action: pan-y; }
/* a turned page settles in quickly; the swap itself waits until its photographs are decoded */
.bk-stage .bk-open.in { animation: bk-turn .32s var(--ease); }
@keyframes bk-turn { from { opacity: .55; } to { opacity: 1; } }
/* the covers, closed: front on the right, back on the left */
.pg.cover { background: #0d0c0a; box-shadow: inset 0 0 0 1px rgba(235,228,214,.09); } /* a dark cover on a dark page still needs an edge */
.pg.cover > img { position: absolute; inset: 0; width: 100%; height: 100%; max-width: none; object-fit: cover; }
.pg.cover .lockup b { font-size: 13cqw; margin-bottom: 1.5cqw; }
.pg.cover .lockup span { font-size: 2cqw; }
.pg.cover::after { width: 4%; }
.pg.cover.back { color: var(--bone); display: flex; flex-direction: column; justify-content: center; padding: 0 14%; }
.pg.cover.back blockquote { margin: 0; font: italic 300 4.6cqh/1.3 var(--serif); }
.pg.cover.back p { font: 2.4cqh/1.5 var(--text); color: var(--bone-dim); margin: 3cqh 0 0; }
.pg.cover.back .meta { position: absolute; left: 14%; right: 14%; bottom: 8%; display: flex; justify-content: space-between;
  font: 1.6cqh var(--mono); letter-spacing: .2em; text-transform: uppercase; color: var(--bone-dim); }
.bk-nav { width: 52px; height: 52px; border-radius: 50%; border: 1px solid var(--rule); background: rgba(235,228,214,.04);
  color: var(--bone); font: 18px var(--mono); cursor: pointer; transition: background .3s, border-color .3s; }
.bk-nav:hover:not(:disabled) { background: var(--bone); color: var(--ink); border-color: var(--bone); }
.bk-nav:disabled { opacity: .25; cursor: default; }
.bk-viewer:focus-visible { outline: 1px solid var(--ember); outline-offset: 10px; }
.bk-bar { display: flex; align-items: center; justify-content: center; gap: 22px; margin: 34px auto 0; max-width: 760px; color: var(--bone-dim); }
.bk-bar span { flex: none; min-width: 15ch; }
.bk-bar input { flex: 1; accent-color: var(--ember); }
/* Chapter index under the viewer: the same ruled grid as the chapter index on the home page.
   Twelve entries (the essay, ten chapters, the plates): two even rows of six, three rows of four, or one column on phones. */
.bk-chapters { max-width: 1500px; margin: clamp(40px, 7vh, 72px) auto 0; }
.bk-toc { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--rule);
  display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); grid-auto-rows: 1fr; }
.bk-toc li { border-bottom: 1px solid var(--rule); border-right: 1px solid var(--rule); }
.bk-toc li:nth-child(6n) { border-right: 0; }
.bk-toc button { display: grid; grid-template-columns: 2.8em minmax(0, 1fr) auto; column-gap: 8px; align-items: baseline; align-content: center;
  width: 100%; height: 100%; padding: 16px 18px; background: none; border: 0; color: var(--bone); text-align: left; cursor: pointer; transition: background .4s; }
.bk-toc button:hover, .bk-toc button[aria-current="true"] { background: var(--ink-2); }
.bk-toc .toc-title { text-transform: none; letter-spacing: -.005em; font-size: clamp(18px, 1.35vw, 24px); line-height: 1.15; }
.bk-toc button[aria-current="true"] .toc-title { color: var(--bone); }
.bk-toc button:not([aria-current="true"]) .toc-title { color: var(--bone-dim); }
.bk-toc button:hover .toc-title { color: var(--bone); }
@media (max-width: 1199px) {
  .bk-toc { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .bk-toc li:nth-child(6n) { border-right: 1px solid var(--rule); }
  .bk-toc li:nth-child(3n) { border-right: 0; }
}
@media (max-width: 760px) { /* one column on phones, as the home page index does */
  .bk-toc { grid-template-columns: minmax(0, 1fr); }
  .bk-toc li, .bk-toc li:nth-child(3n) { border-right: 0; }
}

/* ── Every frame ── */
.bk-group { max-width: 1240px; margin: 0 auto 56px; }
.bk-group h3 { font: 300 26px/1.1 var(--serif); margin: 0 0 18px; display: flex; gap: 14px; align-items: baseline; }
.bk-group h3 span { font: 12px var(--mono); letter-spacing: .14em; color: var(--ember); }
.bk-group ol { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(112px, 1fr)); gap: 10px; }
.bk-group button { display: block; width: 100%; padding: 0; border: 0; background: var(--ink-2); cursor: pointer; aspect-ratio: 1; overflow: hidden; position: relative; }
.bk-group img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .8s var(--ease), opacity .4s; opacity: .86; }
.bk-group button:hover img, .bk-group button:focus-visible img { transform: scale(1.05); opacity: 1; }
.bk-group button span { position: absolute; left: 8px; bottom: 6px; font: 10px var(--mono); letter-spacing: .14em; text-transform: uppercase; color: #fff;
  text-shadow: 0 1px 6px rgba(0,0,0,.8); opacity: 0; transition: opacity .3s; }
.bk-group button:hover span, .bk-group button:focus-visible span { opacity: 1; }

/* ── Details ── */
.bk-details { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(40px, 6vw, 110px);
  padding: clamp(80px, 12vh, 140px) var(--gut); border-top: 1px solid var(--rule); max-width: 1320px; margin: 0 auto; }
.bk-contents { list-style: none; margin: 0 0 44px; padding: 0; font: 18px/1.6 var(--text); color: var(--bone-dim); }
.bk-contents li { padding: 12px 0; border-bottom: 1px solid var(--rule); }
.bk-contents b { color: var(--bone); font-weight: 400; }
.bk-card { margin: 0; transform: rotate(-2deg); max-width: 440px; }
.bk-card img { width: 100%; display: block; box-shadow: 0 20px 40px rgba(0,0,0,.5); }
.bk-card figcaption { color: var(--mute); margin-top: 18px; transform: rotate(2deg); }
.bk-spec { margin: 0; border-top: 1px solid var(--rule); display: grid; }
.bk-spec div { display: grid; grid-template-columns: 7em 1fr; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--rule); }
.bk-spec dt { color: var(--mute); }
.bk-spec dd { margin: 0; color: var(--bone-dim); text-transform: none; letter-spacing: .04em; }
.bk-spec a { color: var(--bone); }

/* ── End ── */
.bk-end { padding: clamp(100px, 16vh, 180px) var(--gut); text-align: center; border-top: 1px solid var(--rule);
  background: radial-gradient(ellipse 60% 70% at 50% 100%, #24201a, var(--ink) 70%); }
.bk-end blockquote { margin: 0 0 30px; font: 300 clamp(34px, 4.6vw, 64px)/1.1 var(--serif); }
.bk-end .bk-price { margin-bottom: 20px; }
.bk-end .mono { color: var(--bone-dim); max-width: 40ch; margin: 0 auto; line-height: 1.8; }

@media (max-width: 900px) {
  .bk-details { grid-template-columns: 1fr; }
  .bk-viewer { grid-template-columns: minmax(0, 1fr); }
  .bk-nav { position: absolute; z-index: 4; top: 50%; transform: translateY(-50%); width: 40px; height: 40px; background: rgba(12,11,9,.6); }
  .bk-nav.prev { left: -6px; } .bk-nav.next { right: -6px; }
}
@media (max-width: 560px) {
  .bk-spec div { grid-template-columns: 1fr; gap: 2px; }
  .bk-spec dt, .bk-spec dd { font-size: 12.5px; line-height: 1.6; }
  .bk-bar span { min-width: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .bk-3d, .bk-group img { transition: none; }
}