:root {
  --ink: #171b1d;
  --body: #343b3e;
  --muted: #687175;
  --accent: #a74631;
  --paper: #ffffff;
  --soft: #f7f7f5;
  --line: #dedfdd;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.65 Arial, Helvetica, sans-serif; -webkit-font-smoothing: antialiased; }
button, input { font: inherit; }
button { cursor: pointer; }
a { color: inherit; }
a:hover { color: var(--accent); }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
.wrap { width: min(100% - 64px, 1180px); margin: 0 auto; }
.skip { position: absolute; z-index: 100; top: -70px; left: 12px; padding: 8px 12px; background: #fff; }
.skip:focus { top: 10px; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { color: var(--ink); font-weight: 500; letter-spacing: -.055em; }
h2 { font-size: clamp(37px, 4.2vw, 58px); line-height: 1.12; }
h3 { font-size: 28px; line-height: 1.18; }
p { color: var(--body); }
.section { padding: 112px 0; scroll-margin-top: 78px; }
.section-number, .eyebrow { color: var(--accent); font: 700 11px/1.4 Arial, sans-serif; letter-spacing: .15em; text-transform: uppercase; }
.section-number span { color: #9da2a2; padding: 0 7px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 55px; padding: 15px 24px; background: var(--ink); border: 1px solid var(--ink); border-radius: 0; color: #fff; font-size: 14px; font-weight: 600; line-height: 1.25; text-align: center; transition: background .2s ease, transform .2s ease; }
.button .price-old { color: #e7b0a4; font-size: .86em; font-weight: 500; }
.button .price-current { color: #fff; }
.button:hover { background: #343b3e; color: #fff; transform: translateY(-1px); }
.button:disabled { opacity: .65; cursor: wait; }
.button-small { min-height: 40px; padding: 10px 15px; font-size: 12px; white-space: nowrap; }
.button-small span { margin-left: 10px; }
.text-link { display: inline-block; padding-bottom: 3px; border-bottom: 1px solid var(--line); font-size: 14px; text-decoration: none; white-space: nowrap; }
.text-link:hover { border-color: var(--accent); }

/* Compact retained navigation */
.site-header { position: sticky; top: 0; z-index: 30; background: rgba(255,255,255,.97); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; gap: 34px; min-height: 67px; }
.brand { display: inline-block; min-width: 210px; color: var(--ink); font-size: 11px; font-weight: 700; line-height: 1.13; letter-spacing: .035em; text-decoration: none; }
.brand-period, .footer-main strong span { color: var(--accent); }
.nav { display: flex; align-items: center; gap: 27px; margin-left: auto; }
.nav a { font-size: 13px; text-decoration: none; }
.nav a:hover { color: var(--accent); }

/* Cover and pages share one perspective. The front cover alone hinges at its spine. */
.hero { overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0,1.12fr) minmax(0,.88fr); gap: 65px; align-items: center; min-height: 720px; padding: 70px 0 86px; }
.hero-copy { min-width: 0; }
.hero .eyebrow { margin-bottom: 25px; }
.hero h1 { font-size: clamp(54px, 5.85vw, 82px); line-height: 1.005; margin-bottom: 29px; }
.title-period { color: var(--accent); }
.short-rule { display: block; width: 60px; height: 1px; margin-bottom: 29px; background: var(--accent); }
.hero-lead { max-width: 620px; margin-bottom: 30px; color: #434b4e; font-size: 19px; line-height: 1.62; }
.hero-actions { display: flex; align-items: center; gap: 25px; flex-wrap: wrap; }
.purchase-note { margin: 19px 0 0; color: #727a7c; font: 700 10px/1.4 Arial, sans-serif; letter-spacing: .14em; }
.purchase-note span { padding: 0 7px; }
.hero-product { width: 100%; min-width: 0; text-align: center; }
.book-scene { width: min(100%, 390px); margin: auto; padding: 33px 24px 38px; perspective: 1300px; perspective-origin: 50% 50%; }
.book-float { animation: book-float 7s ease-in-out infinite; filter: drop-shadow(20px 28px 18px rgba(20,25,26,.17)); }
.book { position: relative; width: 100%; aspect-ratio: .72; transform-style: preserve-3d; transform: rotateY(-8deg) rotateX(2deg); }
.book-pages, .book-inside, .book-cover, .book-spine { position: absolute; }
.book-pages { inset: 4px -10px 3px 5px; background: repeating-linear-gradient(90deg,#e5e5e2 0 2px,#fbfbf8 2px 4px); border: 1px solid #d7d8d3; transform: translateZ(-7px); box-shadow: 3px 7px 6px #0002; }
.book-inside { inset: 8px 1px 8px 7px; z-index: 1; padding: 36px 28px; background: #fafaf7; border: 1px solid #dedfda; text-align: left; transform: translateZ(1px); }
.book-inside span { display: block; margin-bottom: 62px; border-bottom: 1px solid #aeb4b3; padding-bottom: 12px; font-size: 8px; font-weight: 700; letter-spacing: .11em; }
.book-inside i { display: block; height: 11px; margin-bottom: 12px; border-bottom: 1px solid #d7dbd9; }
.book-inside i:nth-of-type(2) { width: 78%; }
.book-inside i:nth-of-type(3) { width: 91%; }
.book-inside b { display: block; margin-top: 45px; color: var(--accent); font-size: 9px; letter-spacing: .1em; }
.book-spine { inset: 0 auto 0 -13px; width: 18px; background: #10171a; transform-origin: right center; transform: rotateY(-75deg) translateZ(1px); }
.book-cover { z-index: 2; inset: 0; display: flex; flex-direction: column; padding: 29px 27px 27px; background: #141b1f; border: 1px solid #253035; color: #fff; text-align: left; transform-origin: left center; transform: rotateY(-3deg) translateZ(3px); backface-visibility: hidden; transition: transform .8s cubic-bezier(.2,.72,.2,1), box-shadow .8s ease; box-shadow: inset -8px 0 13px #0003; }
.book-scene:hover .book-cover { transform: rotateY(-26deg) translateZ(5px); box-shadow: inset -14px 0 18px #0004; }
.cover-edition, .cover-foot { color: #b6bfc0; font: 700 8px/1.3 Arial, sans-serif; letter-spacing: .19em; }
.cover-edition span, .cover-foot span { color: #c2513b; }
.cover-heading { margin: auto 0 22px; font-size: clamp(29px, 2.65vw, 39px); font-weight: 400; line-height: 1.05; letter-spacing: -.055em; }
.cover-heading span { color: #ce513b; }
.cover-description { max-width: 250px; color: #c5cdce; font-size: 13px; line-height: 1.42; }
.cover-lines { display: grid; gap: 13px; margin: 39px 0 51px; }
.cover-lines i { display: block; height: 1px; background: linear-gradient(90deg,#39454b 0 62%,#d05942 62% 65%,#39454b 65%); }
.cover-lines i:nth-child(2) { background: linear-gradient(90deg,#39454b 0 32%,#d05942 32% 35%,#39454b 35%); }
.cover-lines i:nth-child(3) { background: linear-gradient(90deg,#39454b 0 78%,#d05942 78% 81%,#39454b 81%); }
.cover-lines i:nth-child(4) { background: linear-gradient(90deg,#39454b 0 49%,#d05942 49% 52%,#39454b 52%); }
.cover-foot { margin-top: auto; font-size: 7px; }
.book-caption { color: #666f72; font: 700 10px/1.5 Arial, sans-serif; letter-spacing: .13em; }
.book-caption span { color: var(--accent); padding: 0 5px; }
@keyframes book-float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

/* Editorial sections */
.bridge { border-top: 1px solid var(--line); }
.bridge-layout { display: grid; grid-template-columns: 210px 1fr; gap: 48px; }
.bridge h2 { max-width: 820px; }
.bridge-layout > div > p { max-width: 720px; margin: 0 0 38px; font-size: 18px; }
.bridge-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border-top: 1px solid var(--line); }
.bridge-pair > div { padding: 25px 34px 5px 0; }
.bridge-pair > div + div { padding-left: 34px; border-left: 1px solid var(--line); }
.bridge-pair span { display: block; margin-bottom: 17px; color: var(--accent); font-size: 10px; font-weight: 700; letter-spacing: .14em; }
.bridge-pair strong { display: block; margin-bottom: 9px; font-size: 21px; font-weight: 500; letter-spacing: -.025em; }
.bridge-pair p { max-width: 320px; font-size: 14px; }
.contents { background: var(--soft); }
.section-intro { max-width: 820px; margin-bottom: 52px; }
.section-intro > p:last-child { max-width: 690px; color: var(--body); font-size: 18px; }
.contents-list { border-top: 1px solid #cbcecb; }
.contents-list article { display: grid; grid-template-columns: 140px 1fr 20px; gap: 35px; align-items: start; padding: 30px 0; border-bottom: 1px solid #cbcecb; }
.part-number { color: var(--accent); font-size: 11px; font-weight: 700; letter-spacing: .13em; }
.contents-list h3 { margin-bottom: 8px; font-size: 30px; }
.contents-list p { max-width: 710px; margin-bottom: 0; font-size: 16px; }
.part-mark { color: var(--accent); font-size: 20px; }
.preview { overflow: hidden; }
.preview-layout { display: grid; grid-template-columns: .8fr 1.2fr; align-items: center; gap: 80px; }
.preview-copy h2 { max-width: 400px; }
.preview-copy > p:not(.section-number):not(.preview-disclosure) { font-size: 18px; }
.plain-list { padding: 0; margin: 30px 0; list-style: none; }
.plain-list li { padding: 12px 0; border-top: 1px solid var(--line); font-size: 15px; }
.plain-list li:before { content: '—'; margin-right: 14px; color: var(--accent); }
.preview-disclosure { max-width: 350px; margin-top: 15px; color: var(--muted); font-size: 11px; }
.preview-sheets { position: relative; height: 470px; }
.preview-sheet { position: absolute; width: 285px; height: 405px; padding: 27px 25px; background: #fff; border: 1px solid #d7d9d6; box-shadow: 5px 16px 32px #1112; text-align: left; }
.sheet-front { z-index: 2; top: 0; left: 5%; transform: rotate(-4deg); }
.sheet-back { z-index: 1; top: 34px; right: 4%; transform: rotate(5deg); }
.sheet-top, .sheet-foot, .sheet-label { display: block; font-size: 8px; font-weight: 700; letter-spacing: .1em; }
.sheet-top { padding-bottom: 13px; border-bottom: 1px solid #adb8b4; color: #53625d; }
.preview-sheet h3 { margin: 28px 0 10px; font-size: 29px; }
.preview-sheet p { font-size: 11px; }
.sheet-label { margin-top: 19px; color: var(--accent); }
.sheet-row { height: 21px; border-bottom: 1px solid #d8ded9; }
.sheet-box { height: 49px; margin-top: 9px; border: 1px solid #d8ded9; }
.sheet-check { padding: 12px 0; border-bottom: 1px solid #d8ded9; font-size: 11px; }
.sheet-check:before { content: '□'; margin-right: 9px; color: var(--accent); }
.sheet-foot { position: absolute; right: 25px; bottom: 24px; left: 25px; padding-top: 10px; border-top: 1px solid #d8ded9; color: #6b7773; font-size: 7px; }

/* Audit retains radio controls while using the editorial palette. */
.audit { background: var(--soft); }
.audit-wrap { max-width: 850px; }
.section-intro.centered { margin-right: auto; margin-left: auto; text-align: center; }
.section-intro.centered > p:last-child { margin-right: auto; margin-left: auto; }
.audit-panel { background: #fff; border: 1px solid var(--line); }
.audit-panel-head { display: flex; justify-content: space-between; gap: 16px; padding: 20px 30px; border-bottom: 1px solid var(--line); font-size: 10px; letter-spacing: .12em; }
.audit-panel-head span { color: var(--accent); font-weight: 700; }
fieldset { margin: 0; padding: 28px 30px 31px; border: 0; border-bottom: 1px solid var(--line); }
legend { display: block; width: 100%; padding: 0 0 16px; }
legend .question-number { margin-right: 13px; color: var(--accent); font-size: 11px; font-weight: 700; }
legend strong { font-size: 18px; font-weight: 600; }
legend small { display: block; margin: 7px 0 0 33px; color: var(--body); font-size: 15px; }
.audit-option { display: inline-flex; align-items: center; min-width: 130px; min-height: 48px; gap: 10px; margin: 0 8px 8px 0; padding: 10px 16px; border: 1px solid #d4d7d5; cursor: pointer; font-size: 14px; }
.audit-option:has(input:checked) { border-color: var(--accent); background: #fdf6f4; }
.audit-option input { width: 17px; height: 17px; margin: 0; accent-color: var(--accent); }
.audit-result { padding: 30px; }
.score-heading { display: flex; align-items: center; justify-content: space-between; gap: 18px; font-size: 11px; font-weight: 700; letter-spacing: .1em; }
.score-heading strong { color: var(--accent); font-size: 31px; font-weight: 500; }
.score-track { height: 5px; margin: 13px 0 23px; background: #e4e6e3; }
.score-track span { display: block; height: 100%; width: 0; background: var(--accent); transition: width .3s ease; }
.audit-result h3 { margin-bottom: 10px; font-size: 25px; }
.audit-result p { max-width: 650px; font-size: 14px; }
.audit-result .result-bridge { color: var(--ink); font-weight: 600; }
.reset-button { display: inline-block; margin-left: 15px; padding: 12px 0; border: 0; border-bottom: 1px solid var(--line); background: none; color: var(--body); font-size: 13px; }
.audit-note { margin: 18px auto 0; color: var(--muted); font-size: 12px; text-align: center; }
.roadmap-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; }
.roadmap-layout > div > p:last-child { max-width: 520px; font-size: 18px; }
.roadmap ol { margin: 0; padding: 0; border-top: 1px solid var(--line); list-style: none; }
.roadmap li { position: relative; padding: 22px 0 20px 54px; border-bottom: 1px solid var(--line); }
.roadmap li span { position: absolute; left: 0; color: var(--accent); font-size: 12px; }
.roadmap li strong { font-size: 19px; font-weight: 500; }
.roadmap li p { margin: 6px 0 0; font-size: 14px; }
.faq { background: var(--soft); }
.faq-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 90px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; min-height: 59px; padding: 18px 32px 18px 0; font-size: 16px; font-weight: 600; list-style: none; cursor: pointer; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary:after { content: '+'; position: absolute; right: 0; top: 14px; color: var(--accent); font-size: 24px; font-weight: 400; }
.faq-list details[open] summary:after { content: '−'; }
.faq-list p { max-width: 620px; padding-right: 30px; font-size: 15px; }
.final-offer { border-bottom: 1px solid var(--line); }
.final-layout { display: grid; grid-template-columns: 1fr 420px; gap: 90px; align-items: center; }
.final-layout > div > p:last-child { font-size: 18px; }
.offer-panel { padding: 33px; border: 1px solid var(--line); background: var(--soft); }
.offer-panel > span { font-size: 10px; font-weight: 700; letter-spacing: .15em; }
.offer-panel > strong { display: flex; align-items: baseline; gap: 15px; margin: 13px 0 4px; color: var(--ink); font-size: 60px; font-weight: 500; line-height: 1.1; letter-spacing: -.06em; }
.offer-panel > strong .price-old { color: var(--accent); font-size: .48em; font-weight: 600; letter-spacing: -.03em; }
.offer-panel > strong .price-current { color: var(--ink); }
.offer-panel p { margin-bottom: 24px; font-size: 14px; }
.offer-panel .button { width: 100%; }
.offer-panel small { display: block; margin-top: 19px; color: var(--muted); font-size: 11px; line-height: 1.5; }
.footer { background: #fff; }
.footer-main { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 50px; padding: 62px 0; }
.footer-main strong { font-size: 15px; line-height: 1.1; letter-spacing: -.02em; }
.footer-main p { max-width: 280px; margin-top: 17px; color: var(--muted); font-size: 13px; }
.footer nav { display: flex; flex-direction: column; gap: 10px; }
.footer nav a { color: var(--body); font-size: 13px; text-decoration: none; }
.footer nav a:hover { color: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding: 21px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; }

/* Existing legal and order-status pages */
.legal-main { min-height: 65vh; padding: 85px 0 110px; }
.legal-main .legal-content { max-width: 790px; }
.legal-content h1 { font-size: clamp(44px, 6vw, 70px); line-height: 1.05; }
.legal-content h2 { margin: 46px 0 16px; font-size: 29px; }
.legal-content p, .legal-content li { color: var(--body); font-size: 17px; line-height: 1.72; }
.legal-content ul { padding-left: 22px; }
.status-card { margin-top: 28px; padding: 30px; border: 1px solid var(--line); background: var(--soft); }
.status-card h2 { margin-top: 0; }
.legal-main .brand-mark, .footer .brand-mark { display: none; }

@media (max-width: 1050px) {
  .wrap { width: min(100% - 48px, 1180px); }
  .header-inner { gap: 18px; }
  .brand { min-width: 175px; }
  .nav { gap: 18px; }
  .hero-grid { gap: 30px; }
  .hero h1 { font-size: clamp(50px, 5.9vw, 68px); }
  .book-scene { width: min(100%, 355px); }
  .preview-layout, .roadmap-layout, .faq-layout, .final-layout { gap: 45px; }
  .preview-sheets { height: 430px; }
  .preview-sheet { width: 245px; height: 365px; padding: 22px; }
  .sheet-back { right: 0; }
  .sheet-front { left: 0; }
}
@media (max-width: 760px) {
  .site-header { position: relative; }
  .header-inner { min-height: 66px; flex-wrap: wrap; justify-content: space-between; padding: 12px 0; }
  .nav { order: 3; width: 100%; margin: 1px 0 0; justify-content: space-between; gap: 12px; }
  .hero-grid { grid-template-columns: 1fr; gap: 28px; min-height: 0; padding: 65px 0 75px; }
  .hero h1 { font-size: clamp(51px, 8vw, 66px); }
  .hero-lead { max-width: 600px; }
  .hero-product { max-width: 430px; margin: 0 auto; }
  .book-scene { width: min(100%, 365px); }
  .section { padding: 80px 0; scroll-margin-top: 0; }
  .bridge-layout { grid-template-columns: 1fr; gap: 15px; }
  .preview-layout, .roadmap-layout, .faq-layout, .final-layout { grid-template-columns: 1fr; gap: 32px; }
  .preview-sheets { max-width: 570px; width: 100%; margin: auto; }
  .preview-sheet { width: 285px; height: 405px; }
  .final-layout { gap: 16px; }
  .offer-panel { max-width: 500px; }
}
@media (max-width: 520px) {
  .wrap { width: calc(100% - 36px); }
  .brand { min-width: 0; font-size: 9px; }
  .button-small { min-height: 42px; padding: 10px 11px; font-size: 11px; }
  .button-small span { margin-left: 3px; }
  .nav a { font-size: 12px; }
  .hero-grid { padding: 52px 0 66px; }
  .hero .eyebrow { font-size: 10px; }
  .hero h1 { font-size: clamp(42px, 11.2vw, 54px); }
  .hero-lead { font-size: 17px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 18px; }
  .hero-actions .button { width: 100%; }
  .purchase-note { max-width: 330px; line-height: 1.6; }
  .book-scene { width: min(100%, 320px); padding: 25px 23px 31px; }
  .book { transform: rotateY(-7deg) rotateX(2deg); }
  .book-cover { transform: rotateY(-14deg) translateZ(3px); }
  .book-scene:hover .book-cover { transform: rotateY(-14deg) translateZ(3px); }
  .book-cover { padding: 22px 20px; }
  .cover-heading { font-size: 29px; }
  .cover-description { font-size: 11px; }
  .cover-lines { margin: 26px 0; }
  .book-caption { font-size: 9px; }
  .section { padding: 67px 0; }
  h2 { font-size: clamp(34px, 9.2vw, 43px); }
  .section-intro > p:last-child, .bridge-layout > div > p { font-size: 16px; }
  .bridge-pair { grid-template-columns: 1fr; }
  .bridge-pair > div { padding: 22px 0; }
  .bridge-pair > div + div { padding: 22px 0; border-left: 0; border-top: 1px solid var(--line); }
  .contents-list article { grid-template-columns: 1fr 18px; gap: 8px; padding: 25px 0; }
  .part-number { grid-column: 1 / -1; }
  .contents-list h3 { font-size: 26px; }
  .contents-list p { font-size: 15px; }
  .preview-sheets { height: 345px; }
  .preview-sheet { width: 210px; height: 310px; padding: 16px; }
  .sheet-front { left: 0; }
  .sheet-back { right: 0; top: 22px; }
  .preview-sheet h3 { margin: 19px 0 6px; font-size: 22px; }
  .preview-sheet p, .sheet-check { font-size: 9px; }
  .sheet-check { padding: 8px 0; }
  .sheet-top, .sheet-label { font-size: 7px; }
  .sheet-label { margin-top: 12px; }
  .sheet-row { height: 16px; }
  .sheet-box { height: 30px; }
  .sheet-foot { right: 16px; bottom: 15px; left: 16px; font-size: 6px; }
  .audit-panel-head { padding: 16px; font-size: 9px; }
  fieldset { padding: 23px 17px; }
  legend strong { font-size: 17px; }
  legend small { margin-left: 0; font-size: 14px; }
  .audit-option { display: flex; width: 100%; margin: 0 0 8px; min-height: 50px; }
  .audit-result { padding: 20px 17px; }
  .audit-result .button { width: 100%; }
  .reset-button { margin: 13px 0 0; }
  .footer-main { grid-template-columns: 1fr 1fr; gap: 30px; padding: 47px 0; }
  .footer-main > div { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; }
}
@media (max-width: 390px) {
  .brand { font-size: 8px; }
  .button-small { font-size: 10px; }
  .hero h1 { font-size: 42px; }
  .preview-sheet { width: 195px; }
}
@media (hover: none) {
  .book-cover { transform: rotateY(-14deg) translateZ(3px); }
  .book-scene:hover .book-cover { transform: rotateY(-14deg) translateZ(3px); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .book-float { animation: none; }
  .book-cover, .score-track span, .button { transition: none; }
  .book-scene:hover .book-cover { transform: rotateY(-3deg) translateZ(3px); }
}
@media (max-width: 520px) {
  .sheet-front { left: 10px; }
  .sheet-back { right: 10px; }
}