:root {
  --heat-top: #FD2601;
  --heat-foot: #F37E1C;
  --heat-glow: #F4791B;
  --paper: #FFFFFF;
  --line: rgba(255, 255, 255, .9);
  --ghost: rgba(255, 255, 255, .08);
  --ink: #21130F;
  --ink-raised: #322019;
  --ink-deep: #180E0B;
  --accent: #FFAD70;
  --font-display: Impact, Haettenschweiler, "Arial Narrow", sans-serif;
  --font-body: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-label: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --font-technical: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --hero-size: clamp(4rem, 12vw, 180px);
  --chapter-hero-size: clamp(2.5rem, 5vw, 4rem);
  --h1-size: 2.25rem;
  --h2-size: 1.5rem;
  --body-size: 1rem;
  --small-size: .875rem;
  --unit: 8px;
  --measure: 72ch;
  --container: 1280px;
  --corner: 8px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--ink); }
body { margin: 0; color: var(--paper); background: var(--ink); font: var(--body-size)/1.6 var(--font-body); }
::selection { background: var(--heat-top); color: var(--ink-deep); }
h1, h2, h3, p, ul, ol, dl, figure, blockquote { margin: 0; }
h1 { font-size: var(--h1-size); line-height: 1.16; letter-spacing: -.035em; overflow-wrap: anywhere; }
h2 { font-size: var(--h2-size); line-height: 1.28; letter-spacing: -.025em; }
h3 { font-size: 1.125rem; line-height: 1.4; }
p, li, dd, dt, th, td, figcaption, summary, small { font-size: 1rem; }
p { max-width: var(--measure); }
p + p { margin-top: 16px; }
h2 + p, h2 + ul, h2 + ol, h3 + p { margin-top: 24px; }
ul, ol { padding-left: 24px; }
li + li { margin-top: 16px; }
a { color: inherit; text-underline-offset: .22em; text-decoration-thickness: 1px; }
a[href] { min-width: 44px; min-height: 44px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--paper); outline-offset: 5px; border-radius: 2px; }
strong { font-weight: 720; }
hr { border: 0; border-top: 1px solid var(--line); margin: 32px 0; }
svg { display: block; max-width: 100%; }
table { width: 100%; border-collapse: collapse; margin: 24px 0; }
th { text-align: left; font-weight: 650; }
th, td { padding: 20px 16px; border-bottom: 1px solid rgba(255,255,255,.35); vertical-align: top; overflow-wrap: anywhere; }
th:first-child, td:first-child { padding-left: 0; width: 30%; }
details { border-top: 1px solid rgba(255,255,255,.45); }
details:last-child { border-bottom: 1px solid rgba(255,255,255,.45); }
summary { cursor: pointer; padding: 20px 36px 20px 0; font-weight: 620; line-height: 1.5; }
details p { padding: 0 0 24px; }
details[open] summary { color: var(--accent); }

.skip-reading { position: fixed; z-index: 20; top: 12px; left: 12px; padding: 12px 20px; background: var(--ink-deep); transform: translateY(-180%); }
.skip-reading:focus { transform: none; }
.opening { position: relative; isolation: isolate; overflow: hidden; background: #5D2512; }
.opening::before { content: ""; position: absolute; inset: 0; z-index: -4; background: linear-gradient(180deg, var(--heat-top), var(--heat-foot)); }
.opening::after { content: ""; position: absolute; inset: 0; z-index: -2; background: linear-gradient(90deg, rgba(31,9,5,.76), rgba(31,9,5,.67) 62%, rgba(31,9,5,.6)); }
.masthead { position: relative; z-index: 5; max-width: var(--container); margin: auto; padding: 32px 0; display: flex; align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid rgba(255,255,255,.6); font-family: var(--font-label); }
.masthead p { font-size: 16px; }
.masthead p + p { margin-top: 0; }
.guide-name { font-weight: 700; letter-spacing: -.04em; }
.opening-inner { position: relative; max-width: var(--container); margin: auto; padding: 64px 0 72px; min-height: 660px; }
.opening-copy { position: relative; z-index: 3; width: 84%; }
.guide-label { margin-bottom: 24px; font: 16px/1.6 var(--font-label); }
.opening h1 { font-family: var(--font-display); text-transform: uppercase; font-weight: 700; font-size: var(--hero-size); line-height: .96; letter-spacing: -.012em; }
.opening h1 span { display: block; }
.opening-text { margin-top: 32px; max-width: 57ch; font-size: 18px; }
.opening-art { position: absolute; z-index: -3; width: 440px; height: 480px; right: 0; top: 98px; pointer-events: none; }
.opening-art::before, .opening-art::after { content: ""; position: absolute; border-radius: 50%; background: var(--heat-glow); opacity: .6; filter: blur(80px); mix-blend-mode: screen; width: 400px; height: 400px; }
.opening-art::before { top: 0; right: 0; }
.opening-art::after { width: 320px; height: 320px; left: 0; bottom: 0; }
.geometry-cut { position: absolute; inset: 0; transform: rotate(-12deg); background: linear-gradient(135deg, #FFB15E, #F4791B 52%, #932611); -webkit-mask-image: url("/assets/cut.41233c181b3f.svg"); mask-image: url("/assets/cut.41233c181b3f.svg"); -webkit-mask-size: 100% 100%; mask-size: 100% 100%; }
.geometry-ring { position: absolute; width: 300px; height: 300px; left: 58px; top: 62px; border: 56px solid rgba(255,255,255,.92); border-radius: 50%; transform: rotate(15deg); box-shadow: 0 24px 50px rgba(40,12,4,.25); }
.geometry-ring::after { content: ""; position: absolute; width: 158px; height: 188px; background: #E74812; bottom: -66px; right: -64px; border-radius: 8px; transform: rotate(-26deg); }
.geometry-line { position: absolute; width: 270px; height: 14px; background: var(--ink); top: 300px; left: 70px; transform: rotate(-31deg); }
.circle-link { position: absolute; z-index: 4; right: 8px; bottom: 56px; width: 144px; height: 144px; border: 1px solid var(--paper); border-radius: 50%; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; line-height: 1.3; text-decoration: none; font: 16px/1.35 var(--font-label); background: var(--ink-deep); transition: background 180ms, color 180ms, transform 180ms; }
.circle-link b { font-family: var(--font-body); font-size: 28px; font-weight: 400; }
.circle-link:hover { color: var(--ink-deep); background: var(--paper); transform: rotate(-7deg); }
.route-strip { position: relative; z-index: 5; background: var(--ink-deep); border-top: 1px solid rgba(255,255,255,.75); }
.route-strip nav { max-width: var(--container); margin: auto; display: flex; justify-content: space-between; gap: 24px; }
.route-strip a { display: inline-flex; align-items: center; gap: 24px; padding: 24px 0; font: 16px/1.4 var(--font-label); text-decoration: none; }
.route-strip a:hover { color: var(--accent); }
.route-strip span { font-size: 24px; line-height: 1; }
.home-answers { max-width: var(--container); margin: auto; padding: 96px 0; display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.3fr); gap: 96px; }
.home-answers h2 { font: 700 var(--chapter-hero-size)/1.08 var(--font-display); text-transform: uppercase; max-width: 10ch; }
.home-answers div { max-width: var(--measure); }
.chapter-paths { border-top: 1px solid rgba(255,255,255,.65); }
.chapter-paths > header { max-width: var(--container); margin: auto; padding: 72px 0 56px; }
.chapter-paths > header h2 { font: 700 var(--chapter-hero-size)/1.15 var(--font-display); text-transform: uppercase; }
.chapter-paths > header p { margin-top: 24px; }
.chapter-group { max-width: var(--container); margin: auto; display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.3fr); gap: 96px; padding: 48px 0; border-top: 1px solid rgba(255,255,255,.4); }
.chapter-group:nth-of-type(even) { grid-template-columns: minmax(0, 1.3fr) minmax(0, .8fr); }
.chapter-group:nth-of-type(even) header { order: 2; padding-left: 32px; }
.chapter-group header p { margin-top: 16px; max-width: 34ch; }
.chapter-group h3 { font: 700 2.25rem/1.15 var(--font-display); text-transform: uppercase; }
.chapter-list { padding: 0; list-style: none; }
.chapter-list li + li { margin-top: 8px; }
.chapter-list a { display: grid; grid-template-columns: minmax(0, 1fr) 32px; gap: 16px; padding: 24px; background: var(--ink-raised); border: 1px solid rgba(255,255,255,.35); border-radius: var(--corner); text-decoration: none; }
.chapter-list a:hover { background: #41291F; border-color: var(--paper); }
.chapter-list strong { font-size: 18px; line-height: 1.35; }
.chapter-list p { margin-top: 8px; line-height: 1.5; }
.chapter-list span { align-self: center; font-size: 26px; }
.last-prompt { margin-top: 56px; background: #3D2118; border-block: 1px solid rgba(255,255,255,.65); }
.last-prompt > div { max-width: var(--container); margin: auto; padding: 64px 0; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, .8fr); gap: 72px; align-items: center; }
.last-prompt h2 { font: 700 var(--chapter-hero-size)/1.15 var(--font-display); text-transform: uppercase; }
.last-prompt a { margin-top: 24px; }
.chapter-opening .opening-inner { min-height: 0; padding: 64px 0 72px; display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr); gap: 80px; align-items: end; }
.chapter-opening .opening-copy { width: 100%; }
.chapter-opening h1 { font: 720 var(--h1-size)/1.2 var(--font-body); text-transform: none; letter-spacing: -.035em; max-width: 25ch; }
.chapter-opening .opening-text { font-size: 18px; max-width: 60ch; }
.chapter-symbol { width: 100%; max-width: 260px; height: 180px; justify-self: end; position: relative; }
.chapter-symbol::before { content: ""; position: absolute; inset: 0; border: 1px solid var(--line); border-radius: 100px 100px 8px 8px; }
.chapter-symbol::after { content: ""; position: absolute; left: 24px; top: 24px; width: calc(100% - 48px); height: calc(100% - 48px); border: 26px solid rgba(255,255,255,.85); border-radius: 50%; -webkit-mask-image: linear-gradient(180deg, #000 58%, transparent 58%); mask-image: linear-gradient(180deg, #000 58%, transparent 58%); }
.chapter-symbol i { position: absolute; inset: 70px 40px 30px; border-top: 14px solid var(--ink-deep); transform: rotate(-16deg); }
.reading { max-width: var(--container); margin: auto; display: grid; grid-template-columns: minmax(0, 72ch) minmax(0, 240px); justify-content: space-between; gap: 80px; padding: 80px 0; }
.reading article { min-width: 0; }
.reading article > section + section { margin-top: 64px; }
.reading article section > h2 { color: var(--accent); }
.reading article section > h2 + details { margin-top: 24px; }
.chapter-compass { align-self: start; position: sticky; top: 24px; padding: 24px; background: var(--ink-deep); border: 1px solid rgba(255,255,255,.6); border-radius: var(--corner); }
.compass-label { font: 16px/1.6 var(--font-label); }
.chapter-compass ul { padding: 0; list-style: none; margin-top: 16px; }
.chapter-compass li + li { margin-top: 8px; }
.chapter-compass a { display: flex; align-items: center; min-height: 44px; padding: 8px 0; line-height: 1.4; text-decoration-thickness: 1px; }
.chapter-compass > a { border-top: 1px solid rgba(255,255,255,.3); padding-top: 16px; margin-top: 16px; }
.steps { list-style: none; padding: 0; margin-top: 24px; }
.steps li { padding: 28px 24px; border: 1px solid rgba(255,255,255,.55); border-radius: var(--corner); background: var(--ink-raised); }
.steps h3 { color: var(--paper); }
.steps h3 + p { margin-top: 12px; }
.recap { padding: 32px; border: 1px solid var(--line); border-left: 8px solid var(--heat-glow); border-radius: var(--corner); background: var(--ink-raised); margin-top: 64px; }
.recap h2 { color: var(--paper) !important; font-size: 1.25rem; }
.recap h2 + p { margin-top: 16px; }
.source-notes { padding-top: 32px; border-top: 1px solid rgba(255,255,255,.4); }
.source-notes .source-label { font: 16px/1.6 var(--font-label); color: var(--paper); margin-top: 0; }
.source-notes ul { list-style: none; padding: 0; margin-top: 16px; }
.source-notes li + li { margin-top: 16px; }
.source-notes a { display: inline-flex; align-items: center; padding: 8px 0; min-height: 44px; }
.source-notes p { margin-top: 4px; }
.source-notes .source-date { font-family: var(--font-technical); }
.next-link { display: inline-flex; align-items: center; gap: 24px; min-height: 56px; border: 1px solid var(--line); border-radius: var(--corner); padding: 16px 20px; text-decoration: none; line-height: 1.4; }
.next-link:hover { color: var(--ink-deep); background: var(--paper); }
.chapter-turn { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; margin-top: 48px; }
.chapter-turn a { display: flex; align-items: center; padding: 16px; min-height: 72px; gap: 16px; border: 1px solid rgba(255,255,255,.7); border-radius: var(--corner); text-decoration: none; }
.chapter-turn a:hover { background: var(--ink-raised); }
.chapter-turn p { font: 16px/1.3 var(--font-label); }
.chapter-turn strong { display: block; margin-top: 8px; font: 600 16px/1.5 var(--font-body); }
.chapter-turn span { font-size: 24px; }
.missing-page .opening-inner { min-height: 440px; }
footer { background: var(--ink-deep); border-top: 1px solid rgba(255,255,255,.65); }
.footer-reading { max-width: var(--container); margin: auto; padding: 48px 0; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, .8fr); gap: 72px; }
.footer-reading p { max-width: 56ch; }
.footer-reading nav { display: flex; flex-wrap: wrap; gap: 8px 24px; align-content: start; }
.footer-reading a { display: inline-flex; align-items: center; padding: 8px 0; min-height: 44px; }
.footer-reading a:hover { color: var(--accent); }

@keyframes fade-rise { from { opacity: .96; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@media (prefers-reduced-motion: no-preference) {
  .opening-copy { animation: fade-rise 420ms ease-out both; }
}
@media (max-width: 1399px) {
  .masthead, .opening-inner, .route-strip nav, .home-answers, .chapter-paths > header, .chapter-group, .last-prompt > div, .reading, .footer-reading { margin-left: 32px; margin-right: 32px; }
  .opening h1 { font-size: clamp(4rem, 11.5vw, 160px); }
  .opening-art { width: 380px; height: 450px; }
}
@media (min-width: 1400px) {
  .opening-inner { min-height: calc(100svh - 190px); }
}
@media (max-width: 1000px) {
  .home-answers, .chapter-group, .chapter-group:nth-of-type(even) { gap: 48px; }
  .reading { gap: 40px; grid-template-columns: minmax(0, 1fr) 220px; }
  .chapter-opening .opening-inner { gap: 40px; }
  .opening-art { width: 330px; height: 400px; top: 140px; opacity: .55; }
  .geometry-ring { width: 240px; height: 240px; border-width: 40px; left: 36px; top: 80px; }
  .geometry-line { width: 210px; left: 45px; }
}
@media (max-width: 740px) {
  .masthead, .opening-inner, .route-strip nav, .home-answers, .chapter-paths > header, .chapter-group, .last-prompt > div, .reading, .footer-reading { margin-left: 24px; margin-right: 24px; }
  .masthead { padding: 24px 0; gap: 16px; align-items: start; flex-direction: column; }
  .masthead p { line-height: 1.35; }
  .opening-inner { padding: 48px 0 32px; min-height: 0; display: flex; flex-direction: column; }
  .opening-copy { width: 100%; }
  .opening h1 { font-size: clamp(2.5rem, 11vw, 4.5rem); letter-spacing: -.015em; }
  .guide-label { font-size: 16px; margin-bottom: 24px; max-width: 30ch; }
  .opening-text { font-size: 16px; margin-top: 24px; }
  .opening-art { position: relative; top: auto; right: auto; width: 300px; max-width: 100%; height: 280px; margin: 16px auto 0; opacity: .9; }
  .opening-art::before { width: 300px; height: 300px; }
  .opening-art::after { width: 300px; height: 300px; }
  .geometry-cut { transform: none; }
  .geometry-ring { width: 188px; height: 188px; border-width: 34px; left: 58px; top: 30px; }
  .geometry-ring::after { width: 100px; height: 110px; right: -42px; bottom: -46px; }
  .geometry-line { width: 190px; left: 53px; top: 178px; }
  .circle-link { position: relative; right: auto; bottom: auto; width: 120px; height: 120px; align-self: start; margin-top: 32px; }
  .route-strip nav { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 0 24px; }
  .route-strip a { padding: 20px 0; gap: 12px; font-size: 16px; justify-content: space-between; }
  .home-answers { grid-template-columns: 1fr; padding: 64px 0; gap: 32px; }
  .home-answers h2 { max-width: 14ch; font-size: 2.75rem; }
  .chapter-paths > header { padding: 56px 0 32px; }
  .chapter-paths > header h2 { font-size: 2.75rem; }
  .chapter-group, .chapter-group:nth-of-type(even) { grid-template-columns: 1fr; gap: 24px; padding: 32px 0; }
  .chapter-group:nth-of-type(even) header { order: 0; padding-left: 0; }
  .chapter-group h3 { font-size: 1.75rem; }
  .chapter-list a { padding: 20px; gap: 12px; }
  .chapter-list strong { font-size: 18px; }
  .chapter-list p { font-size: 16px; }
  .last-prompt { margin-top: 32px; }
  .last-prompt > div { grid-template-columns: 1fr; gap: 32px; padding: 48px 0; }
  .last-prompt h2 { font-size: 2.75rem; }
  .chapter-opening .opening-inner { grid-template-columns: 1fr; display: grid; padding: 40px 0 48px; gap: 32px; }
  .chapter-opening h1 { font-size: var(--h1-size); max-width: 23ch; }
  .chapter-opening .opening-text { font-size: 16px; }
  .chapter-symbol { height: 88px; max-width: 160px; justify-self: start; }
  .chapter-symbol::before { border-radius: 80px 80px 8px 8px; }
  .chapter-symbol::after { inset: 16px 20px; width: auto; height: auto; border-width: 16px; }
  .chapter-symbol i { inset: 44px 30px 12px; border-top-width: 8px; }
  .reading { grid-template-columns: 1fr; gap: 48px; padding: 48px 0; }
  .reading article > section + section { margin-top: 48px; }
  .chapter-compass { position: static; }
  .recap { padding: 24px; border-left-width: 6px; margin-top: 48px; }
  .steps li { padding: 24px 20px; }
  .chapter-turn { grid-template-columns: 1fr; }
  .footer-reading { grid-template-columns: 1fr; padding: 32px 0; gap: 16px; }
  .footer-reading nav { flex-direction: column; align-items: start; gap: 4px; }
  th, td { padding: 16px 8px; }
  th:first-child, td:first-child { width: 34%; }
}
@media (max-width: 359px) {
  .opening h1 { font-size: clamp(2rem, 11vw, 2.5rem); }
  .masthead, .opening-inner, .route-strip nav, .home-answers, .chapter-paths > header, .chapter-group, .last-prompt > div, .reading, .footer-reading { margin-left: 16px; margin-right: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
@media print {
  body { background: #FFF; color: #111; }
  .opening, footer, .recap, .steps li { background: #FFF; color: #111; }
  .opening::before, .opening::after, .opening-art, .chapter-symbol, .chapter-compass, .chapter-turn, .circle-link, .route-strip, .skip-reading { display: none; }
  .masthead { border-color: #333; }
  .reading { display: block; max-width: 72ch; }
  .reading article section > h2 { color: #111; }
  .source-notes, .recap, .steps li { border-color: #444; }
  details p { display: block; }
  .footer-reading nav { display: none; }
}