:root {
  color-scheme: light;
  --paper: #f3f0e9;
  --surface: #fbfaf6;
  --ink: #232722;
  --muted: #76796f;
  --line: #d9d9cf;
  --accent: #8d6c43;
  --accent-dark: #61492e;
  --deep: #18211f;
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  --font-guts: Baskerville, "Palatino Linotype", "Songti SC", "STSong", "Noto Serif CJK SC", Georgia, serif;
  --font-knox: "Avenir Next", "Helvetica Neue", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  --s1: .5rem;
  --s2: 1rem;
  --s3: 1.5rem;
  --s4: 2rem;
  --s5: 3rem;
  --s6: 5rem;
  --radius: 5px;
  --page: min(1320px, calc(100% - 88px));
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; cursor: pointer; }
a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
img { display: block; max-width: 100%; }
.page { width: var(--page); margin-inline: auto; }
.site-header { height: 84px; display: flex; align-items: center; justify-content: space-between; position: relative; z-index: 4; }
.brand { display: inline-flex; align-items: center; gap: 13px; font-family: Georgia, serif; font-size: 18px; letter-spacing: .18em; font-weight: 600; white-space: nowrap; }
.brand-mark { width: 28px; height: 30px; display: grid; place-items: center; font-size: 20px; color: var(--accent); border-left: 2px solid var(--accent); border-right: 2px solid var(--accent); }
.header-links { display: flex; align-items: center; gap: 34px; color: #555c52; font-size: 13px; letter-spacing: .12em; }
.header-links a:hover, .text-link:hover { color: var(--accent-dark); }
.header-cta { border: 1px solid #b8b9ad; padding: 11px 17px; border-radius: 2px; }
.menu-button { display: none; border: 0; background: transparent; font-size: 22px; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; text-transform: uppercase; letter-spacing: .22em; font-size: 11px; font-weight: 700; }
.eyebrow::before { content: ""; width: 22px; height: 1px; background: currentColor; }
.eyebrow.gold { color: #d9b98b; }
.eyebrow.muted { color: var(--accent); }
.hero { position: relative; isolation: isolate; min-height: 580px; overflow: hidden; background: #20221f; color: #fff; display: flex; align-items: center; }
.hero::before { content: ""; position: absolute; inset: 0; z-index: -2; background: url('assets/retreat-1812-concept.jpg') center 53% / cover; }
.hero::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(10,17,17,.89) 0%, rgba(11,18,18,.68) 37%, rgba(10,16,16,.04) 84%), linear-gradient(0deg, rgba(9,15,16,.32), transparent 35%); }
.hero-copy { padding: 60px 0 80px 7%; max-width: 700px; }
.hero h1 { font-family: var(--serif); font-size: clamp(48px, 6vw, 84px); font-weight: 500; line-height: 1.18; letter-spacing: .08em; margin: 27px 0 24px; }
.hero h1 em { font-style: normal; color: #d9c2a2; }
.hero p { max-width: 475px; font-size: 16px; line-height: 2; color: #e2e3dc; letter-spacing: .04em; }
.hero-actions { display: flex; gap: 17px; align-items: center; margin-top: 36px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-height: 48px; padding: 12px 23px; border-radius: 2px; border: 1px solid transparent; font-size: 13px; letter-spacing: .08em; transition: transform .2s ease, background .2s ease, color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--accent-dark); }
.button-primary:hover { background: #735635; }
.button-light { color: var(--deep); background: #eee9dd; }
.button-outline { color: #fff; border-color: #bac0b8; }
.button-outline:hover { background: rgba(255,255,255,.12); }
.hero-side-note { position: absolute; right: 35px; bottom: 30px; color: #e1e2df; font-size: 10px; letter-spacing: .18em; writing-mode: vertical-rl; }
.section { padding-block: 94px; }
.section-title-row { display: flex; justify-content: space-between; align-items: end; gap: 20px; margin-bottom: 37px; }
.section h2, .book-intro h1 { font-family: var(--serif); font-size: clamp(30px, 4vw, 49px); font-weight: 500; line-height: 1.35; margin: 10px 0 0; letter-spacing: .045em; }
.section-subtitle { font-size: 13px; color: var(--muted); letter-spacing: .06em; }
.text-link { color: var(--accent-dark); font-size: 13px; border-bottom: 1px solid #b8a285; padding-bottom: 5px; white-space: nowrap; }
.books-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.book-card { background: var(--surface); border: 1px solid #e0e0d7; transition: transform .25s ease, box-shadow .25s ease; overflow: hidden; }
.book-card:hover { transform: translateY(-4px); box-shadow: 0 18px 35px rgba(24,33,31,.09); }
.book-visual { height: 340px; position: relative; overflow: hidden; background: #212725; }
.book-visual img { height: 100%; width: 100%; object-fit: cover; transition: transform .5s ease; }
.book-card:hover .book-visual img { transform: scale(1.035); }
.book-visual::after { content: ""; position: absolute; inset: 35% 0 0; background: linear-gradient(transparent, rgba(10,16,16,.68)); }
.book-visual .visual-title { position: absolute; z-index: 1; left: 30px; bottom: 27px; color: #fff; font-family: Georgia, var(--serif); font-size: clamp(28px, 3vw, 41px); max-width: 75%; line-height: 1.2; text-shadow: 0 2px 12px #222; }
.book-card[data-book="guts"] .visual-title { font-family: var(--font-guts); letter-spacing: .035em; }
.book-card[data-book="knox"] .visual-title { font-family: var(--font-knox); font-weight: 600; letter-spacing: .12em; }
.book-body { padding: 27px 30px 29px; }
.book-body .meta, .meta { color: var(--accent); font-size: 11px; letter-spacing: .16em; text-transform: uppercase; }
.book-body p { line-height: 1.85; color: #656a63; font-size: 14px; margin: 12px 0 22px; min-height: 51px; }
.card-bottom { display: flex; justify-content: space-between; align-items: center; border-top: 1px solid var(--line); padding-top: 20px; font-size: 12px; color: #777b73; }
.card-bottom span:last-child { color: var(--accent-dark); font-size: 20px; }
.interlude { background: #e9e7df; padding: 55px 0; }
.interlude .page { display: flex; justify-content: space-between; align-items: center; gap: 30px; }
.interlude blockquote { font: 25px/1.7 var(--serif); margin: 0; letter-spacing: .05em; }
.interlude p { max-width: 330px; color: #676e65; font-size: 13px; line-height: 1.9; }
.latest-list { border-top: 1px solid var(--line); }
.latest-row { display: grid; grid-template-columns: 130px 1fr 200px 30px; gap: 15px; align-items: center; border-bottom: 1px solid var(--line); padding: 26px 10px; transition: background .2s; }
.latest-row:hover { background: rgba(255,255,255,.45); }
.latest-num { color: #a0947c; font-family: Georgia, serif; font-size: 13px; }
.latest-row strong { font: 23px var(--serif); font-weight: 500; }
.latest-row:nth-child(1) strong { font-family: var(--font-guts); }
.latest-row:nth-child(2) strong { font-family: var(--font-knox); font-weight: 600; letter-spacing: .035em; }
.latest-row small { color: var(--muted); font-size: 12px; }
.latest-arrow { color: var(--accent-dark); font-size: 20px; }
.site-footer { background: #17211f; color: #f2f0e8; padding: 58px 0 28px; }
.footer-top { display: flex; justify-content: space-between; align-items: start; gap: 40px; }
.footer-top h3 { font: 30px Georgia, serif; letter-spacing: .12em; margin: 0 0 12px; }
.footer-top p { color: #aeb8b2; line-height: 1.8; font-size: 13px; margin: 0; }
.footer-bottom { margin-top: 55px; padding-top: 22px; border-top: 1px solid #46504c; color: #9ea9a2; font-size: 11px; display: flex; justify-content: space-between; }
.prototype-badge { background: #efe7d6; color: #705536; border: 1px solid #d8c8a9; padding: 9px 13px; font-size: 12px; line-height: 1.5; }
.home-badge { margin-top: 24px; display: inline-block; }
.detail-banner { background: #1d2524; color: #fff; min-height: 450px; position: relative; isolation: isolate; display: flex; align-items: end; }
.detail-banner::before { content: ""; position: absolute; z-index: -2; inset: 0; background: var(--detail-image) center / cover; }
.detail-banner::after { content: ""; position: absolute; z-index: -1; inset: 0; background: linear-gradient(90deg, rgba(15,22,22,.88), rgba(15,22,22,.38) 80%), linear-gradient(0deg, rgba(15,22,22,.48), transparent 50%); }
.book-intro { padding-block: 70px; max-width: 720px; }
.book-intro h1 { font-size: clamp(45px, 6vw, 70px); margin-bottom: 18px; }
.book-page[data-book="guts"] .book-intro h1,
.book-page[data-book="guts"] .catalogue-aside strong,
.book-page[data-book="guts"] .chapter-item h3 { font-family: var(--font-guts); }
.book-page[data-book="knox"] .book-intro h1,
.book-page[data-book="knox"] .catalogue-aside strong,
.book-page[data-book="knox"] .chapter-item h3 { font-family: var(--font-knox); font-weight: 600; letter-spacing: .06em; }
.book-page[data-book="knox"] .book-intro h1 { letter-spacing: .11em; }
.book-intro p { color: #e2e5e0; line-height: 1.9; max-width: 610px; }
.book-stats { display: flex; gap: 35px; margin: 32px 0; font-size: 12px; color: #d6dcd5; }
.catalogue { display: grid; grid-template-columns: 240px 1fr; gap: 65px; }
.catalogue-aside { border-top: 2px solid var(--accent); padding-top: 20px; line-height: 1.8; font-size: 13px; color: #687168; }
.catalogue-aside strong { display: block; font: 24px var(--serif); color: var(--ink); margin-bottom: 12px; }
.chapter-list { border-top: 1px solid var(--line); }
.chapter-item { display: flex; justify-content: space-between; gap: 20px; align-items: center; padding: 25px 12px; border-bottom: 1px solid var(--line); }
.chapter-item:hover { background: #fffaf0; }
.chapter-item h3 { font: 23px var(--serif); font-weight: 500; margin: 5px 0; }
.chapter-item span { font-size: 11px; color: var(--muted); }
.chapter-item .arrow { color: var(--accent); font-size: 22px; }
.reader-shell { --reader-bg: #f5f2ea; --reader-ink: #252924; background: var(--reader-bg); color: var(--reader-ink); min-height: 100vh; transition: background .2s, color .2s; }
.reader-shell[data-theme="warm"] { --reader-bg: #efe7d7; --reader-ink: #3e352c; }
.reader-shell[data-theme="dark"] { --reader-bg: #1e2526; --reader-ink: #e1e1db; color-scheme: dark; }
.reader-shell[data-theme="dark"] :is(.chapter-picker-label, .chapter-picker-chevron, .reader-overline, .toc-kicker, .toc-chapter small, .toc-arrow) { color: #d7b98d; }
.reader-header { min-height: 78px; display: grid; grid-template-columns: 1fr minmax(220px, 420px) 1fr; gap: 24px; align-items: center; border-bottom: 1px solid color-mix(in srgb, var(--reader-ink) 16%, transparent); padding: 10px max(30px, calc((100% - 1260px)/2)); position: sticky; top: 0; z-index: 5; background: var(--reader-bg); }
.reader-header .brand { font-size: 14px; justify-self: start; }
.reader-header .book-return { justify-self: end; font-size: 12px; color: var(--reader-ink); opacity: .7; white-space: nowrap; }
.reader-header .book-return:hover { opacity: 1; }
.chapter-picker-trigger { width: 100%; min-width: 0; display: grid; grid-template-columns: 1fr auto; column-gap: 10px; align-items: center; text-align: center; padding: 8px 20px 9px 30px; border: 1px solid color-mix(in srgb, var(--reader-ink) 22%, transparent); border-radius: 999px; color: var(--reader-ink); background: color-mix(in srgb, var(--reader-bg) 82%, white); box-shadow: 0 3px 14px #0000000a; transition: border-color .2s, transform .2s, box-shadow .2s; }
.chapter-picker-trigger:hover { border-color: var(--accent); box-shadow: 0 6px 22px #00000014; transform: translateY(-1px); }
.chapter-picker-label { grid-column: 1; color: var(--accent); font-size: 10px; font-weight: 700; letter-spacing: .22em; }
.chapter-picker-title { grid-column: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; line-height: 1.5; }
.chapter-picker-chevron { grid-column: 2; grid-row: 1 / span 2; color: var(--accent); font-size: 20px; line-height: 1; }
.reader-main { max-width: 720px; width: calc(100% - 44px); margin: 0 auto; padding: 75px 0 130px; }
.reader-intro { text-align: center; }
.reader-overline { color: var(--accent); letter-spacing: .18em; font-size: 11px; }
.reader-main h1 { font: 500 clamp(33px, 5vw, 50px)/1.35 var(--serif); letter-spacing: .04em; margin: 20px 0 22px; }
.reader-title-rule { display: block; width: 52px; height: 1px; margin: 0 auto; background: var(--accent); }
.reader-note { margin: 20px 0 60px; color: var(--reader-ink); opacity: .65; font-size: 12px; line-height: 1.8; }
.reader-prose { font: var(--reader-size, 19px)/2.05 var(--serif); letter-spacing: .065em; }
.reader-shell[data-book="guts"] .reader-main h1,
.reader-shell[data-book="guts"] .reader-prose,
.reader-shell[data-book="guts"] .toc-head h2,
.reader-shell[data-book="guts"] .toc-dialog a { font-family: var(--font-guts); }
.reader-shell[data-book="knox"] .reader-main h1,
.reader-shell[data-book="knox"] .reader-prose,
.reader-shell[data-book="knox"] .toc-head h2,
.reader-shell[data-book="knox"] .toc-dialog a { font-family: var(--font-knox); }
.reader-shell[data-book="knox"] .reader-main h1 { font-weight: 600; letter-spacing: .025em; }
.reader-shell[data-book="knox"] .reader-prose { line-height: 1.95; letter-spacing: .025em; }
.reader-shell[data-book="knox"] .reader-prose p:first-child::first-letter { font-size: 1em; }
.reader-prose p { margin: 0 0 1.55em; text-indent: 2em; }
.reader-prose p:first-child::first-letter { font-size: 1.15em; }
.reader-divider { text-align: center; color: #a79373; font-size: 20px; margin: 50px 0; letter-spacing: .45em; }
.reader-end { border-top: 1px solid color-mix(in srgb, var(--reader-ink) 18%, transparent); margin-top: 80px; padding-top: 25px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 10px; }
.reader-end > div:last-child { justify-self: end; }
.reader-end .button { border-color: color-mix(in srgb, var(--reader-ink) 25%, transparent); color: var(--reader-ink); background: transparent; }
.reader-end-chapters { font-size: 12px; letter-spacing: .08em; }
.reader-tools { position: fixed; z-index: 7; right: 25px; top: 50%; transform: translateY(-50%); display: flex; flex-direction: column; gap: 7px; padding: 9px; border: 1px solid color-mix(in srgb, var(--reader-ink) 15%, transparent); background: var(--reader-bg); box-shadow: 0 10px 30px #0000000d; }
.tool { width: 42px; height: 42px; border: 0; background: transparent; color: var(--reader-ink); font-size: 15px; }
.tool:hover { background: color-mix(in srgb, var(--reader-ink) 10%, transparent); }
.tool[aria-pressed="true"] { background: var(--accent); color: white; }
.tool-separator { width: 27px; border-top: 1px solid color-mix(in srgb, var(--reader-ink) 15%, transparent); margin: 4px auto; }
.reader-progress { position: fixed; z-index: 9; top: 0; left: 0; width: var(--progress, 0%); height: 3px; background: var(--accent); }
.progress-label { position: fixed; bottom: 22px; right: 29px; font-size: 11px; opacity: .52; letter-spacing: .12em; }
.toc-dialog { width: min(560px, calc(100% - 32px)); max-height: min(82dvh, 740px); margin: auto; padding: 0; border: 1px solid color-mix(in srgb, var(--reader-ink) 18%, transparent); border-radius: 18px; background: var(--reader-bg); color: var(--reader-ink); box-shadow: 0 28px 90px #0005; }
.toc-dialog:not([open]) { display: none; }
.toc-dialog[open] { display: flex; flex-direction: column; }
.toc-dialog::backdrop { background: #101917b8; backdrop-filter: blur(4px); }
.toc-head { flex: none; display: flex; justify-content: space-between; align-items: start; gap: 18px; padding: 30px 32px 23px; border-bottom: 1px solid color-mix(in srgb, var(--reader-ink) 13%, transparent); }
.toc-kicker { color: var(--accent); font-size: 11px; letter-spacing: .14em; }
.toc-head h2 { font: 500 30px var(--serif); margin: 8px 0 6px; }
.toc-head p { margin: 0; color: var(--reader-ink); opacity: .65; font-size: 12px; }
.toc-close { flex: none; width: 36px; height: 36px; border: 1px solid color-mix(in srgb, var(--reader-ink) 17%, transparent); border-radius: 50%; background: transparent; color: var(--reader-ink); font-size: 25px; line-height: 1; }
.toc-close:hover { border-color: var(--accent); color: var(--accent); }
.toc-list { min-height: 0; overflow-y: auto; overscroll-behavior: contain; padding: 10px 24px 14px; }
.toc-chapter { display: flex; justify-content: space-between; align-items: center; gap: 18px; min-height: 58px; padding: 12px 16px; border-bottom: 1px solid color-mix(in srgb, var(--reader-ink) 10%, transparent); font: 16px/1.5 var(--serif); }
.toc-chapter:hover { color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, transparent); }
.toc-chapter[aria-current="page"] { color: var(--reader-ink); background: color-mix(in srgb, var(--accent) 13%, var(--reader-bg)); border-left: 3px solid var(--accent); padding-left: 13px; }
.toc-chapter small { flex: none; color: var(--accent); font: 600 11px var(--sans); letter-spacing: .08em; }
.toc-arrow { flex: none; color: var(--accent); font-size: 15px; }
.toc-foot { flex: none; padding: 17px 24px; border-top: 1px solid color-mix(in srgb, var(--reader-ink) 13%, transparent); text-align: center; color: var(--reader-ink); opacity: .58; font-size: 11px; }
@media (max-width: 800px) {
  :root { --page: calc(100% - 38px); }
  .site-header { height: 68px; }
  .header-links { gap: 16px; }
  .header-links a:not(.header-cta) { display: none; }
  .hero { min-height: 590px; align-items: end; }
  .hero::after { background: linear-gradient(0deg, rgba(8,15,15,.95), rgba(8,15,15,.12) 100%); }
  .hero-copy { padding: 75px 26px 42px; }
  .hero h1 { font-size: clamp(45px, 9vw, 70px); }
  .hero-side-note { display: none; }
  .section { padding-block: 65px; }
  .books-grid { gap: 16px; }
  .book-visual { height: 260px; }
  .book-body { padding: 21px; }
  .interlude .page { display: block; }
  .interlude p { margin-top: 20px; }
  .catalogue { grid-template-columns: 1fr; gap: 20px; }
  .catalogue-aside { max-width: 570px; }
}
@media (max-width: 560px) {
  .brand { font-size: 14px; gap: 8px; }
  .brand-mark { width: 23px; height: 25px; font-size: 17px; }
  .header-cta { padding: 9px; font-size: 11px; }
  .hero h1 { letter-spacing: .04em; }
  .hero p { font-size: 14px; }
  .hero-actions { gap: 10px; flex-wrap: wrap; }
  .button { min-height: 44px; padding: 10px 15px; }
  .section-title-row { align-items: start; }
  .books-grid { grid-template-columns: 1fr; gap: 22px; }
  .book-visual { height: 290px; }
  .book-body p { min-height: 0; }
  .latest-row { grid-template-columns: 95px 1fr 20px; gap: 8px; }
  .latest-row small { display: none; }
  .latest-row strong { font-size: 19px; }
  .footer-top { display: block; }
  .footer-top p { margin-top: 20px; }
  .detail-banner { min-height: 520px; }
  .book-intro { padding-block: 48px; }
  .book-stats { gap: 15px; flex-wrap: wrap; }
  .reader-header { min-height: 66px; grid-template-columns: 28px minmax(0, 1fr) 70px; gap: 12px; padding: 7px 14px; }
  .reader-brand-name { display: none; }
  .reader-header .book-return { font-size: 11px; }
  .chapter-picker-trigger { padding: 6px 10px 7px 18px; }
  .chapter-picker-label { font-size: 9px; }
  .chapter-picker-title { font-size: 12px; }
  .reader-main { padding-top: 48px; padding-bottom: 130px; }
  .reader-prose { line-height: 1.9; }
  .reader-tools { top: auto; right: 0; bottom: 0; left: 0; transform: none; flex-direction: row; justify-content: space-around; border-width: 1px 0 0; padding: 5px 9px max(5px, env(safe-area-inset-bottom)); }
  .tool-separator { width: 1px; height: 26px; border: 0; border-left: 1px solid color-mix(in srgb, var(--reader-ink) 15%, transparent); margin: auto 2px; }
  .progress-label { bottom: 73px; right: 15px; }
  .reader-end { margin-top: 55px; grid-template-columns: 1fr 1fr; }
  .reader-end > div:first-child { grid-column: 1; grid-row: 2; }
  .reader-end > div:last-child { grid-column: 2; grid-row: 2; }
  .reader-end-chapters { grid-column: 1 / -1; grid-row: 1; }
  .toc-dialog { width: calc(100% - 24px); max-height: calc(100dvh - 32px); border-radius: 14px; }
  .toc-head { padding: 22px 20px 18px; }
  .toc-list { padding-inline: 12px; }
  .toc-chapter { padding-inline: 12px; }
  .toc-chapter[aria-current="page"] { padding-left: 9px; }
  .toc-foot { padding: 13px 18px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; } }