:root {
  --forest-950: #0b1b15;
  --forest-900: #10261d;
  --forest-800: #19382b;
  --forest-700: #28513f;
  --cream: #f3eee3;
  --paper: #fbf8f1;
  --gold: #d5a744;
  --gold-deep: #a97a1f;
  --ink: #17201b;
  --muted: #66716a;
  --line: #d9d2c4;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.manual-skip { position: fixed; z-index: 100; left: 16px; top: 12px; padding: 10px 14px; background: var(--gold); color: var(--forest-950); font-size: 12px; font-weight: 800; transform: translateY(-180%); transition: transform .2s; }
.manual-skip:focus { transform: translateY(0); }
.manual-noscript { max-width: 900px; margin: 30px auto 0; padding: 18px 22px; border: 1px solid #c8bfae; background: #fff; color: var(--muted); line-height: 1.7; }

.site-header {
  position: absolute;
  z-index: 20;
  inset: 0 0 auto;
  height: 92px;
  padding: 0 clamp(24px, 5vw, 78px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #fff;
}
.brand { display: flex; align-items: center; gap: 13px; font-size: 11px; font-weight: 700; letter-spacing: .13em; line-height: 1.35; text-transform: uppercase; }
.brand-mark { width: 39px; height: 39px; display: grid; place-items: center; border: 1px solid rgba(213,167,68,.72); color: var(--gold); font-family: Georgia, serif; font-size: 15px; letter-spacing: -.05em; transform: rotate(45deg); text-indent: -1px; }
.brand-mark > span { transform: rotate(-45deg); }
.header-nav { display: flex; align-items: center; gap: 34px; font-size: 12px; font-weight: 600; letter-spacing: .03em; }
.header-nav a:not(.nav-cta) { color: rgba(255,255,255,.76); transition: color .2s; }
.header-nav a:hover { color: #fff; }
.nav-cta { border: 1px solid rgba(255,255,255,.46); border-radius: 999px; padding: 11px 18px; }

.hero {
  position: relative;
  min-height: 810px;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(400px, .92fr);
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 24% 18%, rgba(44,88,68,.28), transparent 36%),
    linear-gradient(122deg, var(--forest-950) 0%, #0f291f 58%, #07110e 100%);
}
.hero::before { content: ""; position: absolute; inset: 0; opacity: .055; background-image: linear-gradient(90deg, #fff 1px, transparent 1px), linear-gradient(#fff 1px, transparent 1px); background-size: 64px 64px; mask-image: linear-gradient(to right, #000, transparent 76%); }
.hero-copy { position: relative; z-index: 2; padding: 174px 7vw 90px; max-width: 850px; }
.eyebrow, .section-kicker { margin: 0 0 22px; font-size: 10px; line-height: 1.2; font-weight: 800; letter-spacing: .21em; text-transform: uppercase; color: var(--gold); }
.eyebrow { display: flex; align-items: center; gap: 12px; }
.eyebrow span { width: 28px; height: 1px; background: var(--gold); }
.hero h1 { margin: 0; font-family: Georgia, "Times New Roman", serif; font-size: clamp(68px, 7.2vw, 114px); font-weight: 400; line-height: .85; letter-spacing: -.065em; }
.hero h1 em { color: var(--gold); font-weight: 400; }
.hero-lede { max-width: 650px; margin: 32px 0 0; color: rgba(255,255,255,.73); font-size: 16px; line-height: 1.75; }
.hero-actions { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 24px; align-items: center; }
.button { min-height: 48px; padding: 0 21px; display: inline-flex; align-items: center; gap: 28px; border-radius: 2px; font-size: 12px; font-weight: 800; }
.button-gold { background: var(--gold); color: var(--forest-950); }
.text-link { display: inline-flex; align-items: center; gap: 12px; padding-bottom: 6px; border-bottom: 1px solid rgba(255,255,255,.35); color: rgba(255,255,255,.84); font-size: 12px; font-weight: 700; }
.hero-stats { display: flex; gap: 50px; margin-top: 58px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.14); max-width: 600px; }
.hero-stats div { display: flex; align-items: center; gap: 12px; }
.hero-stats strong { font-family: Georgia, serif; font-size: 34px; font-weight: 400; color: var(--gold); }
.hero-stats span { color: rgba(255,255,255,.5); font-size: 9px; line-height: 1.4; letter-spacing: .12em; text-transform: uppercase; }
.hero-visual { position: relative; min-height: 810px; }
.hero-image-frame { position: absolute; inset: 85px 0 0; overflow: hidden; }
.hero-image-frame::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to right, var(--forest-950) 0%, transparent 23%), linear-gradient(to top, rgba(7,17,14,.94), transparent 45%); }
.hero-image-frame img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 20%; filter: saturate(.78) contrast(1.04); }
.hero-age { position: absolute; z-index: 3; right: 7%; top: 175px; display: grid; justify-items: center; gap: 3px; padding: 18px 14px; border: 1px solid rgba(213,167,68,.45); background: rgba(9,24,18,.56); backdrop-filter: blur(8px); }
.hero-age strong { font-family: Georgia, serif; font-size: 47px; line-height: 1; color: var(--gold); }
.hero-age span { font-size: 8px; letter-spacing: .13em; text-transform: uppercase; color: rgba(255,255,255,.62); }
.hero blockquote { position: absolute; z-index: 3; left: 4%; right: 8%; bottom: 52px; margin: 0; max-width: 430px; font-family: Georgia, serif; font-size: 21px; font-style: italic; line-height: 1.45; color: rgba(255,255,255,.88); }
.hero-rail { position: absolute; z-index: 4; right: -194px; top: 50%; margin: 0; transform: rotate(90deg); font-size: 8px; font-weight: 800; letter-spacing: .3em; color: rgba(255,255,255,.34); }

.manifesto { padding: 100px clamp(24px, 8vw, 126px); text-align: center; background: var(--cream); }
.manifesto h2, .section-heading h2, .author-copy h2, .method-intro h2, .pathways-heading h2, .manual-heading h2, .download-copy h2, .safety h2 { margin: 0; font-family: Georgia, serif; font-weight: 400; letter-spacing: -.04em; }
.manifesto h2 { font-size: clamp(42px, 5vw, 74px); line-height: 1.04; }
.manifesto h2 em { color: var(--gold-deep); font-weight: 400; }
.manifesto > p:last-child { max-width: 790px; margin: 31px auto 0; font-size: 15px; line-height: 1.8; color: var(--muted); }

.method-section { display: grid; grid-template-columns: .82fr 1.18fr; gap: clamp(45px, 7vw, 110px); padding: 104px clamp(24px, 7vw, 110px); background: var(--forest-950); color: #fff; }
.method-intro { align-self: start; position: sticky; top: 40px; }
.method-intro h2 { max-width: 520px; font-size: clamp(48px, 5vw, 76px); line-height: 1; color: var(--gold); }
.method-intro > p:last-child { max-width: 480px; margin: 28px 0 0; color: rgba(255,255,255,.6); line-height: 1.75; }
.method-grid { display: grid; border-top: 1px solid rgba(255,255,255,.13); }
.method-card { display: grid; grid-template-columns: 58px 1fr; gap: 20px; align-items: start; padding: 22px 4px; border-bottom: 1px solid rgba(255,255,255,.13); }
.method-card > span { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid rgba(213,167,68,.5); color: var(--gold); font-family: Georgia, serif; font-size: 20px; }
.method-card h3 { margin: 1px 0 5px; font-family: Georgia, serif; font-size: 22px; font-weight: 400; }
.method-card p { margin: 0; color: rgba(255,255,255,.55); font-size: 13px; line-height: 1.55; }

.parts-section { padding: 96px clamp(24px, 7vw, 110px) 112px; }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 60px; margin-bottom: 42px; }
.section-heading h2 { font-size: clamp(38px, 4vw, 60px); }
.section-heading > p { max-width: 360px; margin: 0 0 5px; color: var(--muted); line-height: 1.65; font-size: 14px; }
.parts-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.part-card { appearance: none; width: 100%; min-height: 255px; padding: 27px; position: relative; display: flex; flex-direction: column; justify-content: flex-end; border: 0; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.4); color: var(--ink); text-align: left; cursor: pointer; transition: background .25s, transform .25s; }
.part-card:hover { z-index: 2; background: #fff; transform: translateY(-4px); box-shadow: 0 18px 48px rgba(17,35,27,.09); }
.part-number { position: absolute; top: 23px; right: 25px; font-family: Georgia, serif; font-size: 13px; color: var(--gold-deep); }
.part-range { margin: 0 0 10px; color: var(--gold-deep); font-size: 9px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.part-card h3 { max-width: 300px; margin: 0 0 22px; font-family: Georgia, serif; font-size: 25px; font-weight: 400; line-height: 1.15; }
.part-accent { color: var(--muted); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; }
.part-open { margin-top: 20px; font-size: 11px; font-weight: 800; color: var(--forest-700); opacity: 0; transform: translateY(4px); transition: opacity .2s, transform .2s; }
.part-card:hover .part-open, .part-card:focus-visible .part-open { opacity: 1; transform: none; }

.pathways { padding: 100px clamp(24px, 7vw, 110px) 110px; background: var(--cream); }
.pathways-heading { max-width: 720px; margin-bottom: 42px; }
.pathways-heading h2 { font-size: clamp(46px, 5vw, 72px); }
.pathways-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.pathways-grid button { appearance: none; min-height: 275px; padding: 26px; display: flex; flex-direction: column; align-items: flex-start; border: 1px solid #d4ccbd; background: rgba(255,255,255,.56); color: var(--ink); text-align: left; cursor: pointer; transition: background .2s, border-color .2s, transform .2s; }
.pathways-grid button:hover, .pathways-grid button:focus-visible { background: #fff; border-color: var(--gold); transform: translateY(-4px); }
.pathways-grid button > span { color: var(--gold-deep); font-family: Georgia, serif; font-size: 23px; }
.pathways-grid h3 { margin: auto 0 12px; font-family: Georgia, serif; font-size: 26px; line-height: 1.12; font-weight: 400; }
.pathways-grid p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.6; }
.pathways-grid b { margin-top: 20px; font-size: 10px; letter-spacing: .08em; text-transform: uppercase; }

.author-slice { display: grid; grid-template-columns: .92fr 1.08fr; min-height: 640px; background: var(--forest-950); color: #fff; }
.author-image { overflow: hidden; min-height: 620px; }
.author-image img { width: 100%; height: 100%; object-fit: cover; object-position: center 22%; filter: saturate(.8); }
.author-copy { padding: clamp(60px, 8vw, 120px); align-self: center; }
.author-copy h2 { font-size: clamp(52px, 6vw, 88px); color: var(--gold); }
.credentials { max-width: 540px; margin: 17px 0 30px; padding-bottom: 24px; border-bottom: 1px solid rgba(255,255,255,.14); color: rgba(255,255,255,.6); font-size: 11px; line-height: 1.7; letter-spacing: .08em; text-transform: uppercase; }
.author-copy > p:not(.section-kicker):not(.credentials) { max-width: 630px; color: rgba(255,255,255,.73); line-height: 1.8; }
.author-quote { margin-top: 32px; font-family: Georgia, serif; font-size: clamp(25px, 3vw, 40px); font-style: italic; color: var(--gold); }
.text-link.light { margin-top: 24px; }

.manual-section { scroll-margin-top: 0; padding: 100px clamp(20px, 4vw, 64px) 120px; background: #eae3d6; }
.manual-heading { max-width: 1350px; margin: 0 auto 44px; display: flex; justify-content: space-between; align-items: flex-end; gap: 60px; }
.manual-heading h2 { max-width: 800px; font-size: clamp(48px, 5vw, 76px); line-height: 1.02; }
.manual-heading > div:first-child > p:last-child { max-width: 680px; margin: 24px 0 0; color: var(--muted); line-height: 1.7; }
.progress-card { min-width: 235px; padding: 16px 20px; display: flex; align-items: center; gap: 16px; border: 1px solid #d0c7b7; background: rgba(255,255,255,.45); }
.progress-card > div:last-child { display: grid; gap: 4px; }
.progress-card strong { font-size: 13px; }
.progress-card span { color: var(--muted); font-size: 10px; letter-spacing: .06em; text-transform: uppercase; }
.progress-ring { --progress: 0%; width: 56px; height: 56px; flex: 0 0 56px; display: grid; place-items: center; border-radius: 50%; background: conic-gradient(var(--gold-deep) var(--progress), #d5cdbf 0); position: relative; }
.progress-ring::before { content: ""; position: absolute; inset: 5px; border-radius: 50%; background: var(--cream); }
.progress-ring span { position: relative; z-index: 1; color: var(--ink); font-size: 10px; font-weight: 800; }
.manual-shell { max-width: 1350px; min-height: 920px; margin: 0 auto; display: grid; grid-template-columns: 365px minmax(0, 1fr); background: var(--paper); box-shadow: 0 28px 80px rgba(41,45,39,.12); }

.chapter-library { height: 900px; position: sticky; top: 0; display: flex; flex-direction: column; border-right: 1px solid var(--line); background: var(--forest-950); color: #fff; overflow: hidden; }
.library-top { padding: 27px 25px 18px; }
.library-top label { display: block; margin-bottom: 9px; color: var(--gold); font-size: 9px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.library-top input { width: 100%; height: 43px; padding: 0 13px; border: 1px solid rgba(255,255,255,.2); outline: 0; background: rgba(255,255,255,.06); color: #fff; font-size: 12px; }
.library-top input::placeholder { color: rgba(255,255,255,.36); }
.library-top input:focus { border-color: var(--gold); box-shadow: 0 0 0 2px rgba(213,167,68,.16); }
.part-filters { padding: 0 25px 14px; display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; }
.part-filters button { appearance: none; height: 27px; border: 1px solid rgba(255,255,255,.15); background: transparent; color: rgba(255,255,255,.55); font-size: 9px; cursor: pointer; }
.part-filters button.active { border-color: var(--gold); background: var(--gold); color: var(--forest-950); font-weight: 800; }
.result-count { margin: 0; padding: 0 25px 12px; color: rgba(255,255,255,.38); font-size: 9px; letter-spacing: .1em; text-transform: uppercase; }
.chapter-listing { overflow-y: auto; scrollbar-width: thin; scrollbar-color: rgba(213,167,68,.4) transparent; }
.chapter-listing > button { appearance: none; width: 100%; min-height: 77px; padding: 14px 18px 14px 25px; display: grid; grid-template-columns: 31px 1fr 18px; gap: 10px; align-items: start; border: 0; border-top: 1px solid rgba(255,255,255,.08); background: transparent; color: #fff; text-align: left; cursor: pointer; }
.chapter-listing > button:hover { background: rgba(255,255,255,.045); }
.chapter-listing > button.selected { background: rgba(213,167,68,.12); box-shadow: inset 3px 0 var(--gold); }
.chapter-listing > button > span:first-child { padding-top: 2px; color: var(--gold); font-family: Georgia, serif; font-size: 15px; }
.chapter-listing > button > span:nth-child(2) { display: grid; gap: 7px; }
.chapter-listing strong { font-family: Georgia, serif; font-size: 14px; line-height: 1.2; font-weight: 400; }
.chapter-listing small { color: rgba(255,255,255,.38); font-size: 8px; letter-spacing: .08em; text-transform: uppercase; }
.chapter-listing b { color: var(--gold); font-size: 11px; }
.empty-results { padding: 20px 25px; color: rgba(255,255,255,.55); font-size: 12px; line-height: 1.6; }

.chapter-reader { --reader-scale: 1; min-width: 0; padding: 0 clamp(30px, 6vw, 88px) 50px; background: var(--paper); }
.reader-toolbar { height: 70px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 9px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.font-controls { display: flex; align-items: center; gap: 8px; }
.font-controls button { appearance: none; width: 34px; height: 30px; border: 1px solid var(--line); background: transparent; color: var(--ink); font-weight: 800; cursor: pointer; }
.font-controls button:hover, .font-controls button:focus-visible { border-color: var(--gold-deep); }
.chapter-header { padding: 66px 0 46px; border-bottom: 1px solid var(--line); }
.chapter-header > p { margin: 0 0 13px; color: var(--gold-deep); font-size: 10px; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.chapter-header h2 { max-width: 870px; margin: 0; font-family: Georgia, serif; font-size: calc(clamp(42px, 5vw, 68px) * var(--reader-scale)); line-height: 1.01; font-weight: 400; letter-spacing: -.045em; }
.chapter-header blockquote { max-width: 780px; margin: 30px 0 0; padding-left: 20px; border-left: 2px solid var(--gold); color: var(--forest-700); font-family: Georgia, serif; font-size: calc(17px * var(--reader-scale)); font-style: italic; line-height: 1.6; }
.chapter-body { max-width: 820px; padding: 45px 0 25px; font-family: Georgia, "Times New Roman", serif; font-size: calc(17px * var(--reader-scale)); line-height: 1.82; }
.chapter-body > p { margin: 0 0 24px; }
.chapter-body h3 { margin: 54px 0 19px; color: var(--forest-700); font-family: Arial, sans-serif; font-size: calc(20px * var(--reader-scale)); line-height: 1.25; letter-spacing: -.015em; }
.chapter-body h4 { margin: 40px 0 15px; color: var(--gold-deep); font-family: Arial, sans-serif; font-size: calc(16px * var(--reader-scale)); line-height: 1.3; }
.chapter-list { margin: 0 0 28px; padding-left: 25px; }
.chapter-list li { margin-bottom: 10px; padding-left: 6px; }
.chapter-list li::marker { color: var(--gold-deep); font-weight: 800; }
.chapter-callout { margin: 42px 0; padding: 26px 30px; border-left: 4px solid var(--gold); background: #f0eadc; }
.chapter-callout > span { display: block; margin-bottom: 9px; color: var(--gold-deep); font-family: Arial, sans-serif; font-size: 9px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.chapter-callout p { margin: 0; }
.chapter-table-wrap { margin: 35px 0; overflow-x: auto; }
.chapter-table-wrap table { width: 100%; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 12px; }
.chapter-table-wrap th, .chapter-table-wrap td { min-width: 130px; padding: 11px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.chapter-table-wrap th { background: var(--forest-800); color: #fff; }
.chapter-complete { margin: 38px 0 0; padding: 25px 0; display: flex; align-items: center; justify-content: space-between; gap: 25px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.chapter-complete > div { display: grid; gap: 5px; }
.chapter-complete span { color: var(--gold-deep); font-size: 9px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.chapter-complete strong { font-family: Georgia, serif; font-size: 16px; font-weight: 400; }
.chapter-complete button { appearance: none; min-width: 190px; min-height: 42px; padding: 0 18px; border: 1px solid var(--forest-700); background: transparent; color: var(--forest-700); font-size: 11px; font-weight: 800; cursor: pointer; }
.chapter-complete button.is-complete { background: var(--forest-700); color: #fff; }
.chapter-pagination { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; padding-top: 34px; }
.chapter-pagination button { appearance: none; min-height: 68px; padding: 12px 0; display: grid; gap: 6px; border: 0; background: transparent; color: var(--ink); font-family: Georgia, serif; font-size: 14px; line-height: 1.2; text-align: left; cursor: pointer; }
.chapter-pagination button:last-child { text-align: right; }
.chapter-pagination button:disabled { opacity: .25; cursor: default; }
.chapter-pagination span { color: var(--gold-deep); font-family: Arial, sans-serif; font-size: 8px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }

.downloads { padding: 110px clamp(24px, 7vw, 110px); display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(40px, 7vw, 100px); background: var(--forest-800); color: #fff; }
.download-copy h2 { max-width: 600px; font-size: clamp(48px, 5vw, 74px); line-height: 1.03; }
.download-copy > p:last-child { max-width: 610px; margin: 26px 0 0; color: rgba(255,255,255,.62); line-height: 1.75; }
.download-cards { display: grid; align-content: center; }
.download-cards a { min-height: 105px; padding: 22px 6px; display: grid; grid-template-columns: 62px 1fr 28px; gap: 20px; align-items: center; border-top: 1px solid rgba(255,255,255,.16); }
.download-cards a:last-child { border-bottom: 1px solid rgba(255,255,255,.16); }
.download-cards a:hover strong { color: var(--gold); }
.download-cards > a > span { width: 54px; height: 54px; display: grid; place-items: center; border: 1px solid rgba(213,167,68,.48); color: var(--gold); font-size: 9px; font-weight: 800; }
.download-cards a > div { display: grid; gap: 7px; }
.download-cards strong { font-family: Georgia, serif; font-size: 22px; font-weight: 400; transition: color .2s; }
.download-cards small { color: rgba(255,255,255,.43); font-size: 9px; letter-spacing: .1em; text-transform: uppercase; }
.download-cards b { color: var(--gold); font-size: 20px; }

.safety { padding: 80px clamp(24px, 10vw, 150px); display: grid; grid-template-columns: 110px 1fr; gap: 45px; align-items: center; background: #f5efe4; }
.safety > div:first-child { width: 94px; height: 94px; display: grid; place-items: center; border: 1px solid #c8bfae; border-radius: 50%; color: var(--gold-deep); font-family: Georgia, serif; font-size: 48px; font-weight: 300; }
.safety h2 { font-size: clamp(37px, 4vw, 56px); }
.safety > div:last-child > p:last-child { max-width: 900px; margin: 20px 0 0; color: var(--muted); font-size: 13px; line-height: 1.75; }

footer { min-height: 150px; padding: 35px clamp(24px, 5vw, 80px); display: flex; align-items: center; justify-content: space-between; gap: 30px; background: var(--forest-950); color: rgba(255,255,255,.55); font-size: 10px; }
.footer-brand { display: flex; align-items: center; gap: 13px; }
.footer-brand > span { width: 40px; height: 40px; display: grid; place-items: center; border: 1px solid var(--gold); color: var(--gold); font-family: Georgia, serif; }
.footer-brand > div { display: grid; gap: 5px; }
.footer-brand strong { color: #fff; font-size: 11px; letter-spacing: .06em; text-transform: uppercase; }
.footer-brand small { font-size: 8px; letter-spacing: .08em; text-transform: uppercase; }
footer a { color: var(--gold); font-weight: 800; }

button:focus-visible, a:focus-visible, input:focus-visible { outline: 3px solid #f0bd4e; outline-offset: 3px; }

@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; }
  .hero-copy { padding-bottom: 42px; }
  .hero-visual { min-height: 600px; }
  .hero-image-frame { inset: 0; }
  .parts-grid { grid-template-columns: repeat(2, 1fr); }
  .method-section { grid-template-columns: 1fr; }
  .method-intro { position: static; }
  .pathways-grid { grid-template-columns: repeat(2, 1fr); }
  .author-copy { padding: 65px 45px; }
  .manual-heading { align-items: flex-start; }
  .manual-shell { grid-template-columns: 295px minmax(0, 1fr); }
  .chapter-library { height: 820px; }
  .chapter-reader { padding-left: 38px; padding-right: 38px; }
  .downloads { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .site-header { height: 76px; padding: 0 20px; }
  .header-nav a:not(.nav-cta) { display: none; }
  .nav-cta { padding: 9px 13px; }
  .hero-copy { padding: 128px 23px 50px; }
  .hero h1 { font-size: clamp(56px, 17vw, 80px); }
  .hero-stats { gap: 22px; justify-content: space-between; }
  .hero-stats strong { font-size: 28px; }
  .hero-visual { min-height: 530px; }
  .hero blockquote { font-size: 18px; left: 23px; bottom: 35px; }
  .hero-age { top: 35px; right: 20px; }
  .hero-rail { display: none; }
  .manifesto { padding: 76px 23px; }
  .method-section { padding: 76px 23px; }
  .section-heading { display: block; }
  .section-heading > p { margin-top: 18px; }
  .parts-section { padding: 75px 20px; }
  .parts-grid { grid-template-columns: 1fr; }
  .part-card { min-height: 190px; }
  .pathways { padding: 75px 20px; }
  .pathways-grid { grid-template-columns: 1fr; }
  .pathways-grid button { min-height: 235px; }
  .author-slice { grid-template-columns: 1fr; }
  .author-image { min-height: 520px; }
  .author-copy { padding: 65px 23px; }
  .manual-section { padding: 75px 0 90px; }
  .manual-heading { display: block; padding: 0 20px; }
  .progress-card { margin-top: 28px; }
  .manual-shell { display: block; min-height: 0; box-shadow: none; }
  .chapter-library { height: auto; max-height: 520px; position: static; border-right: 0; }
  .chapter-listing { max-height: 320px; }
  .chapter-reader { padding: 0 22px 42px; }
  .chapter-header { padding-top: 48px; }
  .chapter-header h2 { font-size: calc(clamp(39px, 12vw, 56px) * var(--reader-scale)); }
  .chapter-body { font-size: calc(16px * var(--reader-scale)); }
  .chapter-complete { align-items: flex-start; flex-direction: column; }
  .chapter-complete button { width: 100%; }
  .chapter-pagination { grid-template-columns: 1fr; }
  .chapter-pagination button:last-child { text-align: left; border-top: 1px solid var(--line); }
  .downloads { padding: 78px 22px; }
  .download-cards a { grid-template-columns: 54px 1fr 20px; gap: 13px; }
  .download-cards strong { font-size: 18px; }
  .safety { padding: 70px 23px; grid-template-columns: 1fr; }
  .safety > div:first-child { width: 72px; height: 72px; }
  footer { padding: 45px 22px; align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}