@charset "UTF-8";

:root {
  color-scheme: light;
  --paper: #ffffff;
  --canvas: #fbfcfa;
  --surface: #f6f8f7;
  --ink: #172b2c;
  --muted: #677779;
  --muted-on-tint: #536b65;
  --mint-on-tint: #066b5f;
  --line: #dde5e1;
  --line-strong: #b6c8c0;
  --mint: #087f70;
  --mint-wash: #e6f2ed;
  --radius: 8px;
  font-family: Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", system-ui, "Malgun Gothic", sans-serif;
  font-synthesis: none;
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
}

* { box-sizing: border-box; }
body { margin: 0; min-width: 0; background: var(--canvas); }
html { scroll-padding-top: 24px; }
button, a, summary { touch-action: manipulation; }
button, .button, .text-link, .site-nav a, .site-nav summary { transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease; }
[hidden] { display: none !important; }
h1, h2, h3, h4, p, figure, dl, dd { margin: 0; }
h1, h2, h3, h4 { line-height: 1.3; letter-spacing: -.035em; text-wrap: pretty; }
h1 { font-size: clamp(38px, 4.3vw, 60px); font-weight: 730; }
h2 { font-size: clamp(28px, 2.7vw, 38px); font-weight: 700; }
h3 { font-size: 20px; font-weight: 650; }
h4 { font-size: 17px; }
p, li, dd, dt, h1, h2, h3, h4, a, button, code, pre { overflow-wrap: anywhere; }
p, li, dd { word-break: keep-all; }
ul, ol { padding-left: 23px; margin: 12px 0; }
li + li { margin-top: 8px; }
a { color: var(--mint); text-underline-offset: 4px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; touch-action: manipulation; }
button:disabled { cursor: not-allowed; color: #697482; background: var(--surface); border-color: var(--line); }
a, button, summary { -webkit-tap-highlight-color: transparent; }
button, section, article, aside, nav, main, figure, div, fieldset { min-width: 0; }
summary { cursor: pointer; min-height: 44px; padding-block: 10px; }
summary::marker { color: var(--mint); }
:focus-visible { outline: 3px solid var(--mint); outline-offset: 4px; }
::selection { background: #cfe8df; color: var(--ink); }
img { display: block; max-width: 100%; height: auto; }
svg { display: block; max-width: 100%; font-family: inherit; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .9em; }
section[id] { scroll-margin-top: 28px; }

.container { width: calc(100% - 96px); max-width: 1320px; margin-inline: auto; }
.site-header { position: relative; z-index: 10; display: flex; align-items: center; gap: 36px; min-height: 100px; border-bottom: 1px solid var(--line); }
.header-preview { display: inline-flex; align-items: center; flex: 0 0 auto; gap: 8px; padding: 6px 11px; border: 1px solid var(--line); border-radius: 30px; color: var(--muted); font-size: 12px; line-height: 1.5; white-space: nowrap; }
.header-preview::before { content: ""; width: 5px; height: 5px; border: 1px solid var(--mint); border-radius: 50%; }
.site-nav details { position: relative; align-self: center; }
.site-nav summary { display: flex; align-items: center; gap: 8px; min-height: 44px; padding: 0; list-style: none; color: var(--muted); font-size: 14px; }
.site-nav summary::-webkit-details-marker { display: none; }
.site-nav summary::marker { content: ""; }
.site-nav summary > span { display: inline-block; transition: transform 180ms ease; }
.site-nav details[open] summary > span { transform: rotate(180deg); }
.site-nav summary:hover, .site-nav details[open] summary { color: var(--mint); }
.site-nav details > div, .site-nav details > nav, .site-nav details > ul { position: absolute; z-index: 20; top: calc(100% + 8px); right: 0; display: grid; min-width: 184px; margin: 0; padding: 8px; border: 1px solid var(--line); border-radius: 10px; background: var(--paper); box-shadow: 0 12px 32px rgb(23 43 44 / 7%); list-style: none; }
.site-nav details a { display: flex; justify-content: space-between; gap: 28px; padding: 10px 12px; border: 0; border-radius: 5px; }
.site-nav details:not([open]) > :not(summary) { display: none; }
.site-nav details a:hover { background: var(--mint-wash); color: var(--mint-on-tint); }
.site-nav details a[aria-current="page"] { background: var(--mint-wash); color: var(--mint-on-tint); }
.site-nav details a > span { color: var(--mint); }
.brand { display: flex; flex: 1 1 auto; align-items: center; gap: 16px; color: var(--ink); text-decoration: none; }
.brand img { width: 148px; height: 36px; object-fit: contain; flex: 0 0 148px; }
.brand > span { padding-left: 16px; border-left: 1px solid var(--line); font-size: 13px; color: var(--muted); line-height: 1.4; }
.site-nav { display: flex; align-items: stretch; flex-wrap: wrap; gap: 8px 24px; }
.site-nav a { display: inline-flex; min-height: 44px; align-items: center; border-bottom: 2px solid transparent; color: var(--muted); font-size: 14px; text-decoration: none; white-space: nowrap; }
.site-nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--mint); font-weight: 700; }
.site-nav a:hover { color: var(--mint); }
.header-demo { flex: 0 0 auto; }
.button { display: inline-flex; min-height: 50px; align-items: center; justify-content: center; gap: 20px; padding: 12px 20px; border: 1px solid var(--line-strong); border-radius: var(--radius); background: var(--paper); color: var(--ink); font-size: 14px; font-weight: 650; line-height: 1.5; text-align: center; text-decoration: none; }
.button:hover:not(:disabled) { border-color: var(--mint); background: var(--mint-wash); text-decoration: none; }
.button-primary { color: var(--paper); border-color: var(--mint); background: var(--mint); }
.button-primary:hover:not(:disabled) { color: var(--paper); background: #066b5f; border-color: #066b5f; }
.button-quiet { background: transparent; border-color: transparent; }
.button-quiet:hover:not(:disabled) { border-color: var(--line); background: var(--paper); }
.button > span[aria-hidden] { transition: transform 180ms ease; }
.button:hover > span[aria-hidden] { transform: translateX(2px); }
.button-small { min-height: 44px; padding: 8px 12px; font-size: 14px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 28px; }
.kicker { color: var(--mint); font-size: 12px; line-height: 1.5; font-weight: 700; letter-spacing: .12em; }
.fine { color: var(--muted); font-size: 14px; line-height: 1.65; }
.lead { max-width: 800px; margin-top: 24px; color: var(--muted); font-size: 17px; line-height: 1.9; }
.execution-boundary { margin-top: 24px; padding-left: 16px; border-left: 2px solid var(--mint); font-size: 15px; font-weight: 550; }
.scope-note { margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.text-link { color: var(--mint); font-size: 14px; font-weight: 650; text-decoration: underline; text-underline-offset: 5px; }
.page-intro { padding: 62px 0 48px; border-bottom: 1px solid var(--line); }
.page-intro h1 { margin-top: 18px; }
.page-intro > .fine { max-width: 820px; margin-top: 16px; }
.section-topline { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
.section-topline h2 { margin-top: 12px; }
.section-topline > a, .section-topline > .fine { flex: 0 0 auto; }
.section-intro h2 { margin-top: 16px; }
.section-intro > p:not(.kicker) { max-width: 370px; margin-top: 20px; color: var(--muted); }
.site-footer { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; margin-top: 80px; padding-block: 32px 40px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; line-height: 1.9; }
.site-footer p:last-child { flex-shrink: 1; }
.site-footer > p:last-child { text-align: right; }
.footer-name { margin-bottom: 8px; color: var(--ink); font-size: 17px; font-weight: 700; letter-spacing: -.025em; }
.footer-name > span { margin-left: 12px; color: var(--muted); font-size: 12px; font-weight: 400; letter-spacing: 0; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; padding: 0; margin: -1px; }
.skip-link { position: fixed; top: -100px; left: 20px; z-index: 100; padding: 12px 20px; border: 2px solid var(--mint); border-radius: var(--radius); background: var(--paper); color: var(--ink); }
.skip-link:focus { top: 12px; }

/* Home: one editorial composition rather than repeated card surfaces. */
.home-hero { display: grid; grid-template-columns: 1.2fr 1fr; align-items: center; gap: 44px; padding-block: 94px 88px; }
.hero-copy h1 { margin-top: 28px; font-size: clamp(56px, 4.45vw, 64px); line-height: 1.23; letter-spacing: -.062em; font-weight: 700; word-break: keep-all; }
.hero-copy h1 > span { color: var(--mint); }
.hero-description { max-width: 470px; margin-top: 30px; color: var(--muted); font-size: 18px; line-height: 1.85; }
.hero-copy .actions { margin-top: 32px; gap: 8px; }
.hero-copy .button { min-height: 56px; padding-inline: 22px; font-size: 15px; }
.preview-notice { max-width: 430px; margin-top: 32px; }
.preview-notice > p:first-child { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; color: var(--ink); font-size: 12px; }
.preview-notice strong { font-weight: 650; }
.preview-notice > p:first-child > span { padding-left: 10px; border-left: 1px solid var(--line-strong); color: var(--muted); }
.preview-notice > p + p { margin-top: 8px; color: var(--muted); font-size: 13px; line-height: 1.7; }
.hero-copy > .fine { max-width: 440px; margin-top: 12px; }
.hero-diagram figcaption { display: flex; flex-direction: column; gap: 8px; padding: 0 0 12px 2px; font-size: 14px; color: var(--muted); }
.hero-diagram svg { width: 100%; }
.hero-mobile-tracks { display: none; }
.svg-kicker { font-size: 13px; font-weight: 700; letter-spacing: 1px; }
.svg-heading { font-size: 22px; font-weight: 650; letter-spacing: -.4px; }
.svg-body { font-size: 17px; }
.svg-small { font-size: 14px; }
.svg-strong { font-weight: 650; }
.path-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.path-link { padding: 28px 28px 32px; color: var(--ink); text-decoration: none; }
.path-link:first-child { padding-left: 0; }
.path-link:last-child { padding-right: 0; }
.path-link + .path-link { border-left: 1px solid var(--line); }
.path-link h2 { display: flex; justify-content: space-between; gap: 8px; margin-top: 12px; font-size: 21px; }
.path-link h2 > span { color: var(--mint); }
.path-link p { margin-top: 12px; color: var(--muted); font-size: 15px; }
.path-link .text-link { display: inline-block; margin-top: 24px; }
.path-link:hover { background: var(--surface); }
.editorial-section { display: grid; grid-template-columns: .9fr 1.1fr; gap: 80px; padding-block: 80px; }
.narrative-flow { margin: 0; padding: 0; list-style: none; }
.narrative-flow li { display: flex; align-items: baseline; gap: 24px; padding: 22px 0; border-top: 1px solid var(--line); }
.narrative-flow li + li { margin-top: 0; }
.narrative-flow li:first-child { padding-top: 0; border-top: 0; }
.narrative-flow p { margin-top: 6px; color: var(--muted); font-size: 15px; }
.narrative-flow h3 { font-size: 20px; }
.narrative-flow small { margin-left: 8px; color: var(--mint); font-size: 14px; font-weight: 500; }
.step-number { color: var(--muted); font-size: 14px; font-variant-numeric: tabular-nums; }
.human-step h3, .human-step .step-number { color: var(--mint); }
.showcase-section { padding-top: 44px; border-top: 1px solid var(--line); }
.screenshot-figure { margin-top: 28px; }
.screenshot-figure img { width: 100%; height: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.screenshot-figure figcaption { margin-top: 12px; color: var(--muted); font-size: 14px; }
.case-comparison { display: grid; grid-template-columns: 1fr auto 1fr; gap: 40px; margin-top: 36px; }
.case-comparison h3 { margin-top: 12px; font-size: 23px; }
.case-comparison article > p:last-child { margin-top: 14px; color: var(--muted); }
.case-comparison strong { color: var(--ink); }
.comparison-arrow { align-self: center; color: var(--mint); font-size: 30px; }

/* The illustration is a readable example document, not a simulated live dashboard. */
.work-document { padding-top: 6px; }
.document-stage { position: relative; isolation: isolate; min-height: 520px; padding: 30px 36px 104px 24px; }
.document-stage::before { content: ""; position: absolute; z-index: -2; inset: 8px 0 18px 48px; border-radius: 100px 16px 16px 16px; background: var(--mint-wash); }
.document-back-sheet { position: absolute; z-index: -1; inset: 20px 50px 65px 38px; border: 1px solid #d1e2d9; border-radius: 9px; background: #f5f9f6; transform: rotate(-5deg); }
.document-back-sheet > span { position: absolute; top: 15px; right: 20px; color: var(--muted); font-size: 9px; letter-spacing: .14em; }
.document-sheet { position: relative; padding: 23px 28px 18px; border: 1px solid var(--line); border-radius: 10px; background: var(--paper); box-shadow: 0 20px 48px -24px rgb(23 43 44 / 20%), 0 2px 6px rgb(23 43 44 / 3%); }
.document-topline { display: flex; align-items: center; gap: 8px; padding-bottom: 20px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 11px; }
.document-icon { position: relative; width: 13px; height: 16px; border: 1px solid var(--mint); border-radius: 2px; }
.document-icon::after { content: ""; position: absolute; inset: 5px 3px 4px; border-block: 1px solid var(--mint); }
.document-example { margin-left: auto; padding: 3px 7px; border-radius: 4px; background: var(--surface); color: var(--muted); font-size: 10px; }
.document-eyebrow { margin-top: 25px; color: var(--mint); font-size: 11px; font-weight: 650; letter-spacing: .025em; }
.document-sheet h2 { margin-top: 12px; font-size: clamp(25px, 2.2vw, 31px); line-height: 1.4; font-weight: 650; letter-spacing: -.04em; }
.document-subtitle { margin-top: 12px; color: var(--muted); font-size: 12px; }
.document-fields { margin-top: 24px; padding-block: 18px; border-block: 1px solid var(--line); }
.document-fields > div { display: grid; grid-template-columns: 40px 1fr; gap: 16px; font-size: 12px; }
.document-fields > div + div { margin-top: 14px; }
.document-fields dt { color: var(--muted); }
.document-fields dd { color: var(--ink); line-height: 1.65; }
.document-excerpt { display: flex; gap: 12px; margin-top: 24px; padding-bottom: 22px; }
.document-section-number { color: var(--mint); font-size: 11px; font-variant-numeric: tabular-nums; }
.document-excerpt h3 { font-size: 14px; font-weight: 650; }
.document-excerpt p { margin-top: 8px; color: var(--muted); font-size: 11px; line-height: 1.8; }
.document-bottomline { display: flex; justify-content: space-between; padding-top: 14px; border-top: 1px solid var(--line); color: var(--mint); font-size: 10px; letter-spacing: .025em; }
.document-review { position: absolute; right: -4px; bottom: 9px; display: flex; align-items: flex-start; gap: 12px; width: 256px; padding: 18px 20px; border: 1px solid #c9ddd3; border-radius: 9px; background: #f2f8f3; box-shadow: 0 12px 24px -16px rgb(23 43 44 / 18%); transform: rotate(2deg); }
.review-mark { display: grid; place-items: center; flex: 0 0 30px; height: 30px; border: 1px solid #ccded4; border-radius: 50%; color: var(--mint); background: var(--paper); font-size: 20px; }
.document-review-label { display: flex; align-items: center; gap: 10px; color: var(--mint); font-size: 11px; font-weight: 650; }
.document-review-label > span { color: var(--muted); font-size: 10px; font-weight: 400; }
.document-review-label + p { margin-top: 6px; font-size: 13px; line-height: 1.65; }
.document-margin-note { position: absolute; top: 68px; right: 6px; color: var(--mint); font-size: 8px; letter-spacing: .16em; writing-mode: vertical-rl; }
.work-document figcaption { display: flex; flex-wrap: wrap; gap: 6px 12px; margin: 16px 0 0 24px; color: var(--muted); font-size: 10px; }
.work-document figcaption > span { color: var(--mint); letter-spacing: .1em; font-weight: 650; }
.workspace-principle { display: grid; grid-template-columns: 1.2fr 1fr 1fr; align-items: center; gap: 48px; padding-block: 34px; border-block: 1px solid var(--line); }
.workspace-principle h2 { margin-top: 12px; font-size: 22px; line-height: 1.5; }
.workspace-principle > p:not(.fine) { font-size: 17px; line-height: 1.9; }
.workspace-principle > .fine { padding-left: 24px; border-left: 1px solid var(--line); font-size: 13px; line-height: 1.8; }
.home-cases { padding-top: 92px; }
.home-cases .section-topline { margin-bottom: 36px; }
.home-cases h2 { font-size: clamp(30px, 3vw, 42px); }
.case-editorial-grid { display: grid; grid-template-columns: minmax(0, 2.2fr) minmax(0, 1fr); gap: 56px; }
.case-poster-link { position: relative; display: block; border: 1px solid var(--line); border-radius: 10px; background: var(--paper); text-decoration: none; }
.case-poster-link > img { width: 100%; aspect-ratio: 16 / 9; object-fit: contain; border-radius: 9px; }
.poster-play { position: absolute; bottom: 20px; left: 20px; display: inline-flex; align-items: center; gap: 12px; min-height: 46px; padding: 10px 16px; border: 1px solid var(--line); border-radius: 6px; background: var(--paper); color: var(--ink); font-size: 13px; font-weight: 650; transition: background-color 180ms ease, border-color 180ms ease; }
.poster-play > span:first-child { color: var(--mint); font-size: 23px; line-height: 1; }
.poster-duration { padding-left: 12px; border-left: 1px solid var(--line); color: var(--muted); font-size: 11px; font-weight: 400; font-variant-numeric: tabular-nums; }
.case-poster-link:hover .poster-play { background: var(--mint-wash); border-color: var(--mint); }
.featured-case-caption { display: grid; grid-template-columns: 1fr 1fr; align-items: end; gap: 24px; margin-top: 26px; }
.featured-case-caption h3 { margin-top: 10px; font-size: 29px; line-height: 1.4; }
.featured-case-caption h3 a { color: var(--ink); text-decoration: none; }
.featured-case-caption h3 a:hover { color: var(--mint); }
.featured-case-caption > p { color: var(--muted); font-size: 14px; line-height: 1.85; }
.featured-case-caption > p > span { display: block; margin-top: 8px; font-size: 11px; }
.case-list-label { padding-bottom: 14px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.case-side-item + .case-side-item { border-top: 1px solid var(--line); }
.case-side-link { display: block; padding: 24px 0; color: var(--ink); text-decoration: none; }
.case-side-topline { display: flex; justify-content: space-between; gap: 16px; align-items: center; }
.case-side-topline > span:last-child { color: var(--mint); font-size: 18px; transition: transform 180ms ease; }
.case-side-link:hover .case-side-topline > span:last-child { transform: translate(2px, -2px); }
.case-side-link h3 { margin-top: 16px; font-size: 26px; line-height: 1.45; }
.case-side-link:hover h3 { color: var(--mint); }
.case-side-link > p { margin-top: 12px; color: var(--muted); font-size: 14px; }
.case-side-duration { display: flex; gap: 12px; margin-top: 20px; color: var(--ink); font-size: 12px; font-variant-numeric: tabular-nums; }
.case-side-duration > span { color: var(--muted); }
.workspace-flow { padding-block: 96px; gap: 100px; }
.workspace-flow .section-intro .text-link { display: inline-flex; align-items: center; gap: 24px; min-height: 44px; margin-top: 24px; }
.workspace-flow .narrative-flow li { gap: 32px; padding-block: 26px; }
.workspace-flow .narrative-flow li:first-child { padding-top: 0; }
.workspace-flow .narrative-flow h3 { font-size: 23px; }
.workspace-flow .narrative-flow p { margin-top: 10px; line-height: 1.8; }
.workspace-flow .step-number { color: var(--mint); font-size: 12px; }
.workspace-invitation { display: flex; align-items: center; justify-content: space-between; gap: 40px; padding: 48px 56px; border: 1px solid #d7e6de; border-radius: 12px; background: var(--mint-wash); }
.workspace-invitation h2 { margin-top: 18px; font-size: 38px; line-height: 1.35; }
.workspace-invitation h2 br { display: none; }
.workspace-invitation p:not(.kicker) { margin-top: 16px; color: var(--muted); font-size: 14px; }
.invitation-action { flex-shrink: 0; text-align: center; }
.invitation-action .button { min-height: 56px; padding-inline: 24px; }
.invitation-action p.fine { margin-top: 12px; font-size: 11px; }

/* Manual: server-rendered chapters and progressively enhanced local controls. */
.manual-layout { display: grid; grid-template-columns: 224px minmax(0, 1fr); align-items: start; gap: 64px; padding-top: 40px; }
.manual-sidebar { position: sticky; top: 28px; max-height: calc(100vh - 56px); overflow: auto; padding: 4px; margin: -4px; }
.desktop-toc .kicker { margin-bottom: 16px; }
.desktop-toc a, .mobile-toc nav a { display: block; min-height: 44px; padding: 10px 12px; border-left: 2px solid transparent; color: var(--muted); font-size: 14px; text-decoration: none; }
.desktop-toc a:hover, .mobile-toc nav a:hover { color: var(--mint); background: var(--surface); }
[data-toc-link][aria-current="location"] { color: var(--mint); border-left-color: var(--mint); background: var(--mint-wash); font-weight: 650; }
.mobile-toc { display: none; }
.sidebar-crosslink { display: block; margin: 24px 12px 0; padding-top: 20px; border-top: 1px solid var(--line); font-size: 14px; }
.manual-chapter { padding-bottom: 56px; }
.manual-chapter + .manual-chapter { padding-top: 48px; border-top: 1px solid var(--line); }
.manual-chapter > h2 { margin: 14px 0 24px; font-size: clamp(25px, 2.6vw, 34px); }
.manual-chapter > p + p { margin-top: 18px; }
.manual-chapter > p { max-width: 900px; }
.manual-chapter .kicker { font-size: 12px; }
.operation-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; padding-block: 24px; margin-block: 24px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.operation-pair h3 { color: var(--mint); font-size: 15px; letter-spacing: 0; margin-bottom: 10px; }
.operation-pair p, .operation-pair li { font-size: 15px; }
.operation-pair ol { margin-block: 0; padding-left: 20px; }
.operation-pair strong { font-weight: 650; }
.copy-block { margin-block: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.copy-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 20px; border-bottom: 1px solid var(--line); }
.copy-heading h3 { font-size: 15px; letter-spacing: -.02em; }
.copy-heading button { flex-shrink: 0; }
.copy-text { margin: 0; padding: 20px; color: var(--ink); font-family: inherit; font-size: 15px; line-height: 1.85; white-space: pre-wrap; word-break: keep-all; overflow-wrap: anywhere; user-select: text; }
.copy-status:not(:empty) { position: fixed; z-index: 20; bottom: 20px; left: 50%; transform: translateX(-50%); width: max-content; max-width: calc(100% - 40px); padding: 14px 20px; border: 1px solid var(--mint); border-radius: var(--radius); background: var(--paper); color: var(--ink); font-size: 14px; }
.preflight-checklist { margin: 28px 0; padding: 20px 24px; border: 1px solid var(--line); border-radius: var(--radius); }
.preflight-checklist legend { padding-inline: 8px; font-size: 15px; font-weight: 650; }
.preflight-checklist label { display: flex; align-items: baseline; gap: 12px; min-height: 44px; padding-block: 8px; font-size: 15px; }
.preflight-checklist input { flex: 0 0 auto; width: 18px; height: 18px; accent-color: var(--mint); }
.preflight-checklist .fine { margin-top: 10px; }
.callout { margin-top: 28px; padding: 20px 24px; border-left: 3px solid var(--mint); background: var(--mint-wash); }
.callout h3 { margin-bottom: 10px; font-size: 17px; }
.callout p { font-size: 15px; }
.definition-rows { margin-top: 28px; }
.definition-rows > div { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 24px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.definition-rows dt { font-size: 15px; font-weight: 650; }
.definition-rows dd { color: var(--muted); font-size: 15px; }
.definition-rows strong { color: var(--ink); font-weight: 550; }
.chapter-emphasis { font-size: 18px; }
.handoff-inline { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; padding: 20px 0; margin-block: 24px; list-style: none; border-bottom: 1px solid var(--line); }
.handoff-inline li { position: relative; margin: 0; padding-right: 12px; font-size: 14px; font-weight: 650; }
.handoff-inline li:not(:last-child)::after { position: absolute; right: -12px; content: "→"; color: var(--mint); }
.split-note { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-block: 32px; }
.split-note h3 { font-size: 19px; }
.split-note p { margin-top: 14px; color: var(--muted); font-size: 15px; }
.table-scroll { max-width: 100%; margin-block: 28px; overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
table { width: 100%; min-width: 530px; border-collapse: collapse; font-size: 15px; font-variant-numeric: tabular-nums; }
caption { padding: 16px 20px; text-align: left; font-size: 14px; color: var(--muted); }
th, td { padding: 15px 20px; border-top: 1px solid var(--line); text-align: left; vertical-align: top; }
thead th { background: var(--surface); font-size: 14px; font-weight: 650; }
tbody th { font-weight: 500; }
.emphasis-row { background: var(--mint-wash); }
.troubleshooting-list details { border-bottom: 1px solid var(--line); }
.troubleshooting-list summary { padding-block: 18px; font-size: 17px; font-weight: 650; }
.troubleshooting-list details > p { margin: 0 0 24px 18px; font-size: 15px; color: var(--muted); }
.verification-ledger { margin-top: 28px; border-top: 1px solid var(--line); }
.verification-ledger > div { padding-block: 22px; border-bottom: 1px solid var(--line); }
.verification-ledger dt { font-size: 16px; font-weight: 650; }
.verification-ledger dd { margin-top: 10px; color: var(--muted); font-size: 15px; }
.manual-chapter > .verification-ledger + p { margin-top: 28px; }
.reference-details { margin-top: 32px; padding-block: 8px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.reference-details > p { margin-block: 16px; }

/* Architecture: native vectors with a bounded mobile scroll region. */
.architecture-intro { padding-bottom: 40px; }
.tab-list { display: flex; gap: 32px; border-bottom: 1px solid var(--line); }
.tab-list button { min-height: 60px; padding: 12px 2px; border: 0; border-bottom: 2px solid transparent; background: var(--paper); color: var(--muted); font-size: 16px; }
.tab-list button[aria-selected="true"] { border-bottom-color: var(--mint); color: var(--ink); font-weight: 650; }
.tab-list button:focus-visible { outline-offset: -4px; }
.architecture-panel { padding-top: 32px; }
.architecture-panel + .architecture-panel { margin-top: 48px; border-top: 1px solid var(--line); }
.tabs-enhanced .architecture-panel { margin-top: 0; border-top: 0; }
.architecture-figure { border: 1px solid var(--line); border-radius: var(--radius); padding-top: 16px; }
.diagram-scroll { max-width: 100%; overflow-x: auto; padding: 4px 16px; overscroll-behavior-x: contain; }
.diagram-scroll svg { width: 100%; min-width: 800px; }
.diagram-legend { display: flex; flex-wrap: wrap; gap: 10px 28px; padding: 18px 24px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.diagram-legend > span { display: inline-flex; align-items: center; gap: 10px; }
.diagram-legend > span:last-child { flex-basis: 100%; font-size: 13px; }
.legend-line { display: inline-block; width: 30px; height: 0; border-top: 2px solid var(--muted); }
.legend-line.human { border-top: 2px dashed var(--mint); }
.diagram-node.is-highlighted > rect { stroke: var(--mint); stroke-width: 3px; }
[data-flow-edge].is-highlighted > path { stroke: var(--mint); stroke-width: 3px; }
.flow-explainer { margin-top: 32px; }
.flow-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; margin-top: 18px; padding: 0; list-style: none; }
.flow-steps li { margin: 0; }
.flow-steps h3 { font-size: 16px; }
.flow-steps button { width: 100%; min-height: 48px; padding: 12px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); color: var(--muted); text-align: left; font-size: 14px; font-weight: 650; }
.flow-steps button[aria-pressed="true"] { border-color: var(--mint); background: var(--mint-wash); color: var(--mint); }
.flow-description { margin-top: 12px; color: var(--muted); font-size: 15px; }
.flow-enhanced .flow-steps { grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 8px; }
.flow-enhanced .flow-static-label, .flow-enhanced .flow-description { display: none; }
.flow-detail { min-height: 92px; margin-top: 20px; padding: 20px 24px; background: var(--surface); border-left: 2px solid var(--mint); font-size: 16px; }
.system-map { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--line); }
.system-lane { padding: 32px; }
.system-lane:nth-child(2) { border-left: 1px solid var(--line); }
.system-lane h3 { margin-top: 14px; font-size: 24px; }
.system-lane dl { margin-top: 24px; }
.system-lane dl > div + div { margin-top: 24px; }
.system-lane dt { font-size: 16px; font-weight: 650; }
.system-lane dd, .system-lane > p:not(.kicker) { margin-top: 12px; font-size: 15px; color: var(--muted); }
.execution-lane { grid-column: 1 / -1; border-top: 1px solid var(--line); background: var(--mint-wash); }
.execution-lane > p { max-width: 850px; }
.execution-peers { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-top: 28px; padding-top: 24px; border-top: 1px solid #bedcd1; }
.execution-peers p { margin-top: 8px; color: var(--muted); font-size: 15px; }
.architecture-boundaries { display: grid; grid-template-columns: .8fr 1.2fr; gap: 64px; margin-top: 64px; padding-top: 48px; border-top: 1px solid var(--line); }
.architecture-boundaries .definition-rows { margin: 0; }
.architecture-boundaries .definition-rows > div { grid-template-columns: 165px minmax(0, 1fr); }
.architecture-boundaries .definition-rows > div:first-child { padding-top: 0; }
.closing-line { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; margin-top: 48px; padding-top: 28px; border-top: 1px solid var(--line); }
.closing-line p { font-size: 16px; }
.closing-line .actions { margin: 0; }

/* Presentation stays fully readable until JavaScript initializes the deck. */
.presentation-main { padding-top: 20px; }
.deck-topline { display: flex; justify-content: space-between; align-items: center; gap: 24px; margin-bottom: 16px; }
.deck-topline .fine { font-size: 13px; }
.slide { border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 32px; background: var(--paper); }
.slide:focus-visible { outline: none; border-color: var(--mint); }
.presentation-main:focus { outline: none; }
.slide-main { padding: 32px 40px; }
.slide-main > h2, .slide-value h2 { margin-top: 16px; font-size: clamp(30px, 3.4vw, 46px); line-height: 1.19; letter-spacing: -.045em; }
.slide-main > .kicker, .slide-value .kicker { font-size: 12px; }
.slide-lead { margin-top: 24px; color: var(--muted); font-size: 17px; }
.slide-value { display: grid; grid-template-columns: 1.15fr 1fr; gap: 20px 48px; align-items: center; }
.two-track { display: grid; gap: 16px; }
.two-track > div { padding: 20px 24px; border: 1px solid var(--line); background: var(--surface); border-radius: var(--radius); }
.two-track > div:last-child { background: var(--mint-wash); border-color: #c5dfd7; }
.two-track h3 { margin-top: 10px; font-size: 22px; }
.two-track p:not(.kicker) { margin-top: 8px; font-size: 14px; color: var(--muted); }
.two-track .human-track { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; padding-top: 10px; border-top: 1px solid var(--line); color: var(--ink); font-weight: 600; }
.human-track > span { color: var(--mint); font-size: 22px; }
.human-track small { margin-left: auto; color: var(--mint); font-size: 13px; font-weight: 500; }
.slide-bottom-line { margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.slide-value .slide-bottom-line { grid-column: 1 / -1; margin-top: 0; }
.slide-process { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; margin: 28px 0 0; padding: 0; list-style: none; }
.slide-process li { position: relative; margin: 0; padding: 16px 0; border-top: 2px solid var(--line); }
.slide-process li:not(:last-child)::after { position: absolute; top: 52px; right: -20px; content: "→"; color: var(--mint); }
.slide-process li.human-step { border-top: 2px dashed var(--mint); }
.slide-process li > span { font-size: 13px; color: var(--muted); }
.slide-process h3 { font-size: 21px; margin-top: 12px; }
.slide-process p { margin-top: 12px; color: var(--muted); font-size: 15px; }
.slide-diagram-scroll { margin-top: 22px; max-width: 100%; overflow-x: auto; }
.slide-architecture { width: 100%; min-width: 800px; max-height: 225px; }
.slide-context-link { display: inline-block; margin-top: 8px; font-size: 13px; }
.research-composition { display: grid; grid-template-columns: 1fr 1.3fr; gap: 48px; margin-top: 28px; }
.research-sources h3 { margin-top: 14px; font-size: 20px; }
.research-sources > p:not(.kicker) { margin-top: 3px; color: var(--muted); font-size: 14px; }
.proposal-focus { padding-left: 32px; border-left: 2px solid var(--mint); }
.proposal-focus h3 { margin-top: 12px; font-size: 28px; line-height: 1.45; }
.proposal-focus h3 strong { color: var(--mint); font-weight: 700; }
.proposal-focus > p:not(.kicker) { margin-top: 10px; font-size: 14px; color: var(--muted); }
.assumption-label { display: inline-block; margin-top: 12px; padding: 3px 8px; border: 1px solid #c5dfd7; border-radius: 3px; color: var(--mint); font-size: 13px; }
.slide-version-flow { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px; margin-top: 28px; }
.slide-version-flow > div:first-child, .slide-version-flow > div:last-child { padding-block: 12px; border-top: 2px solid var(--line); }
.slide-version-flow > div:last-child { border-top-color: var(--mint); }
.slide-version-flow h3 { margin-top: 10px; font-size: 36px; font-variant-numeric: tabular-nums; }
.slide-version-flow > div:last-child h3 { color: var(--mint); }
.slide-version-flow p:not(.kicker) { color: var(--muted); font-size: 14px; }
.admin-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px 28px; margin-top: 24px; }
.admin-grid > div { padding: 16px 0 4px; border-top: 2px solid var(--line); }
.admin-grid h3 { margin-top: 10px; font-size: 19px; }
.admin-grid p:not(.kicker) { margin-top: 10px; color: var(--muted); font-size: 14px; }
.slide-bridge h2 { font-size: clamp(34px, 4.2vw, 52px); letter-spacing: -.028em; line-height: 1.16; }
.slide-bridge .slide-lead { max-width: 34em; }
.slide-bridge .slide-process { margin-top: 34px; }
.slide-bridge .slide-process li { background: #eef6f2; border-top-color: var(--mint); }
.slide-media { margin: 22px 0 0; }
.slide-media img { display: block; width: 100%; height: auto; border: 1px solid var(--line); border-radius: var(--radius); }
.slide-media figcaption { margin-top: 8px; color: var(--muted); font-size: 13px; }
.slide-media-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 4px; }
.slide-media-row .slide-media { margin-top: 0; }
.risk-bridge { align-self: center; text-align: center; }
.risk-bridge > span { display: block; color: var(--mint); font-size: 26px; line-height: 1.3; }
.calculation-strip { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 24px; margin-top: 16px; padding: 12px 16px; background: var(--mint-wash); font-size: 14px; }
.calculation-strip small { color: var(--muted); font-size: 13px; }
.verification-split { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-top: 28px; }
.verification-split > div { padding-left: 16px; border-left: 2px solid var(--mint); }
.verification-split > div:last-child { border-left-color: var(--line-strong); }
.verification-split h3 { font-size: 19px; }
.verification-split ul { margin: 12px 0 0; padding-left: 18px; font-size: 14px; color: var(--muted); }
.verification-split li + li { margin-top: 6px; }
.slide-notes { border-top: 1px solid var(--line); padding: 24px 40px; background: var(--surface); }
.slide-notes h3 { font-size: 15px; color: var(--mint); }
.slide-notes p { max-width: 1000px; margin-top: 14px; font-size: 15px; color: var(--muted); line-height: 1.9; }
.presentation-controls { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px 24px; padding-block: 14px; }
.slide-navigation, .presentation-tools { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }
#presentation-count { min-width: 64px; text-align: center; font-size: 14px; font-variant-numeric: tabular-nums; }
.presentation-tools button[aria-pressed="true"] { color: var(--mint); border-color: var(--mint); background: var(--mint-wash); }
.presentation-shortcuts { font-size: 12px; }
.presentation-status:not(:empty) { padding-top: 10px; }
.presentation-enhanced .slide { margin-bottom: 0; }
.presentation-enhanced .slide-main { min-height: min(490px, calc(100svh - 256px)); }
.presentation-enhanced .site-footer { margin-top: 20px; padding-block: 16px; }
.overview-dialog { width: min(920px, calc(100% - 40px)); max-width: calc(100% - 40px); max-height: calc(100dvh - 40px); margin: auto; padding: 28px; border: 1px solid var(--line-strong); border-radius: 6px; background: var(--paper); color: var(--ink); overflow-y: auto; }
.overview-dialog::backdrop { background: rgb(244 246 248 / 94%); }
.dialog-heading { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.dialog-heading h2 { margin-top: 8px; font-size: 28px; }
.overview-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-bottom: 20px; }
.overview-grid button { min-height: 156px; padding: 24px 20px; border: 1px solid var(--line); border-radius: var(--radius); color: var(--ink); background: var(--paper); text-align: left; }
.overview-grid button:hover, .overview-grid button[aria-current="true"] { border-color: var(--mint); background: var(--mint-wash); }
.overview-grid span { display: block; font-size: 11px; font-weight: 650; letter-spacing: .04em; color: var(--mint); }
.overview-grid strong { display: block; margin-top: 18px; font-size: 20px; line-height: 1.5; }

@media (max-width: 1180px) {
  .brand > span { display: none; }
  .site-header { gap: 24px; }
  .home-hero { gap: 32px; }
  .hero-copy h1 { font-size: clamp(38px, 4.5vw, 54px); }
  .manual-layout { grid-template-columns: 200px minmax(0, 1fr); gap: 40px; }
  .definition-rows > div { grid-template-columns: 148px minmax(0, 1fr); gap: 20px; }
  .architecture-boundaries { gap: 40px; grid-template-columns: .7fr 1.3fr; }
  .flow-enhanced .flow-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .slide-main { padding: 28px 32px; }
  .slide-value { gap: 20px 32px; }
  .slide-main > h2, .slide-value h2 { font-size: 38px; }
  .two-track > div { padding: 16px 20px; }
}

@media (max-width: 960px) {
  .container {
  .admin-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } width: calc(100% - 64px); }
  .site-header { gap: 16px; }
  .brand img { width: 132px; flex-basis: 132px; }
  .site-nav { gap: 8px 18px; }
  .header-demo { padding-inline: 12px; }
  .home-hero { padding-block: 56px; grid-template-columns: 1fr; gap: 40px; }
  .hero-description { max-width: 640px; }
  .hero-diagram { max-width: 670px; width: 100%; }
  .hero-diagram figcaption { flex-direction: row; justify-content: space-between; }
  .hero-copy h1 { font-size: 52px; }
  .path-link { padding-inline: 20px; }
  .path-link h2 { font-size: 19px; }
  .editorial-section { gap: 40px; grid-template-columns: 1fr 1.1fr; padding-block: 64px; }
  .manual-layout { grid-template-columns: 180px minmax(0, 1fr); gap: 28px; }
  .operation-pair { grid-template-columns: 1fr; gap: 24px; }
  .definition-rows > div { grid-template-columns: 1fr; gap: 8px; }
  .handoff-inline { grid-template-columns: 1fr 1fr; row-gap: 20px; }
  .handoff-inline li:nth-child(2)::after { content: ""; }
  .architecture-boundaries { grid-template-columns: 1fr; gap: 32px; }
  .architecture-boundaries .definition-rows > div { grid-template-columns: 180px minmax(0, 1fr); }
  .slide-value { grid-template-columns: 1fr 1fr; }
  .slide-value h2, .slide-main > h2 { font-size: 34px; }
  .slide-main { padding: 28px; }
  .slide-process { gap: 22px; }
  .slide-process h3 { font-size: 18px; }
  .slide-process p { font-size: 14px; }
  .slide-version-flow h3 { font-size: 30px; }
  .slide-notes { padding: 24px 28px; }
  .research-composition { gap: 24px; }
  .proposal-focus { padding-left: 24px; }
  .deck-topline { flex-wrap: wrap; gap: 4px; }
  .presentation-enhanced .slide-main { min-height: 0; }
  .overview-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .container {
  .slide-media-row { grid-template-columns: 1fr; }
  .admin-grid { grid-template-columns: 1fr; } width: calc(100% - 40px); }
  .site-header { display: grid; grid-template-columns: 1fr auto; padding-top: 14px; gap: 10px 16px; }
  .brand img { width: 140px; flex-basis: 140px; }
  .site-nav { grid-column: 1 / -1; grid-row: 2; justify-content: space-between; gap: 6px 20px; }
  .site-nav a { min-height: 48px; font-size: 14px; }
  .header-demo { min-height: 42px; font-size: 13px; }
  .page-intro { padding-block: 40px 32px; }
  .page-intro h1 { font-size: 40px; }
  .hero-copy h1 { font-size: 46px; }
  .home-hero { padding-block: 44px; }
  .path-grid { grid-template-columns: 1fr; }
  .path-link, .path-link:first-child, .path-link:last-child { padding: 24px 0; }
  .path-link + .path-link { border-left: 0; border-top: 1px solid var(--line); }
  .path-link h2 { font-size: 22px; }
  .path-link .text-link { margin-top: 14px; }
  .editorial-section { grid-template-columns: 1fr; gap: 32px; padding-block: 48px; }
  .section-intro > p:not(.kicker) { max-width: none; }
  .section-topline { align-items: flex-start; flex-direction: column; gap: 16px; }
  .case-comparison { gap: 24px; grid-template-columns: 1fr; }
  .comparison-arrow { transform: rotate(90deg); justify-self: start; }
  .manual-layout { grid-template-columns: 1fr; gap: 32px; padding-top: 24px; }
  .manual-sidebar { position: static; max-height: none; overflow: visible; padding: 0; margin: 0; }
  .desktop-toc { display: none; }
  .mobile-toc { display: block; padding: 8px 16px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
  .mobile-toc summary { font-size: 15px; font-weight: 650; }
  .mobile-toc nav { padding-block: 8px; }
  .sidebar-crosslink { margin: 16px 0 0; padding: 0; border: 0; }
  .manual-chapter { padding-bottom: 40px; }
  .manual-chapter + .manual-chapter { padding-top: 36px; }
  .split-note { grid-template-columns: 1fr; gap: 28px; }
  .copy-heading { padding-inline: 16px; }
  .copy-text { padding: 16px; }
  .preflight-checklist { padding-inline: 16px; }
  .flow-steps { grid-template-columns: 1fr 1fr; }
  .system-map { grid-template-columns: 1fr; }
  .system-lane { padding: 24px; }
  .system-lane:nth-child(2) { border-left: 0; border-top: 1px solid var(--line); }
  .execution-peers { grid-template-columns: 1fr; gap: 24px; }
  .architecture-boundaries .definition-rows > div { grid-template-columns: 1fr; gap: 10px; }
  .architecture-boundaries { margin-top: 44px; padding-top: 36px; }
  .diagram-scroll { padding-inline: 8px; }
  .diagram-legend { padding: 16px; }
  .site-footer { flex-direction: column; gap: 12px; margin-top: 44px; }
  .slide-main { padding: 24px; }
  .slide-value { grid-template-columns: 1fr; gap: 28px; }
  .slide-main > h2, .slide-value h2 { font-size: 34px; }
  .two-track { grid-template-columns: 1fr 1fr; gap: 12px; }
  .two-track > div { padding: 16px; }
  .two-track h3 { font-size: 19px; }
  .two-track .human-track { gap: 6px; }
  .two-track small { flex-basis: 100%; margin-left: 0; }
  .slide-process { grid-template-columns: 1fr 1fr; gap: 16px 28px; }
  .slide-process li:nth-child(2)::after { content: ""; }
  .research-composition { grid-template-columns: 1fr; gap: 24px; }
  .research-sources { padding-bottom: 20px; border-bottom: 1px solid var(--line); }
  .proposal-focus { padding-left: 20px; }
  .verification-split { grid-template-columns: 1fr; gap: 24px; }
  .slide-version-flow { grid-template-columns: 1fr 1fr; gap: 20px; }
  .risk-bridge { grid-column: 1 / -1; grid-row: 2; padding-top: 14px; border-top: 1px solid var(--line); display: flex; gap: 12px; justify-content: space-between; align-items: center; text-align: left; }
  .slide-version-flow .risk-bridge > span { display: none; }
  .slide-version-flow .risk-bridge br { display: none; }
  .presentation-controls { align-items: stretch; }
  .slide-navigation { justify-content: space-between; width: 100%; }
  .presentation-tools { width: 100%; justify-content: space-between; }
  .presentation-tools button { flex: 1 1 auto; }
  .presentation-shortcuts { display: none; }
  .slide-notes { padding: 20px 24px; }
  .slide-notes p { font-size: 15px; }
  .overview-dialog { padding: 20px; }
  .overview-grid { gap: 12px; }
  .overview-grid button { min-height: 140px; padding: 16px; }
  .overview-grid strong { font-size: 17px; }
}

@media (max-width: 480px) {
  .site-nav { gap: 4px 14px; }
  .site-nav a { font-size: 13px; }
  .brand img { width: 128px; flex-basis: 128px; }
  .hero-copy h1 { font-size: 39px; }
  .page-intro h1 { font-size: 38px; }
  .hero-diagram figcaption { flex-direction: column; }
  .hero-diagram svg { display: none; }
  .hero-mobile-tracks { display: grid; gap: 16px; }
  .hero-mobile-tracks > div { padding: 22px; border: 1px solid var(--line); background: var(--surface); border-radius: var(--radius); }
  .hero-mobile-tracks > div:last-child { background: var(--mint-wash); }
  .hero-mobile-tracks h3 { margin-top: 10px; font-size: 23px; }
  .hero-mobile-tracks p:not(.kicker) { margin-top: 12px; font-size: 15px; }
  .hero-mobile-tracks .human-track { color: var(--mint); }
  .copy-heading { flex-wrap: wrap; gap: 10px; }
  .copy-heading button { margin-left: auto; }
  .flow-enhanced .flow-steps { grid-template-columns: 1fr 1fr; }
  .flow-steps { grid-template-columns: 1fr; }
  .slide-main { padding: 22px 18px; }
  .slide-main > h2, .slide-value h2 { font-size: 30px; }
  .slide-lead { font-size: 16px; }
  .desktop-break { display: none; }
  .two-track { grid-template-columns: 1fr; }
  .two-track .human-track { gap: 12px; }
  .two-track small { flex-basis: auto; margin-left: auto; }
  .slide-version-flow h3 { font-size: 27px; }
  .slide-notes { padding: 20px 18px; }
  .overview-grid { grid-template-columns: 1fr; }
  .overview-grid button { min-height: 115px; }
  .overview-grid strong { margin-top: 10px; }
  .dialog-heading { align-items: flex-start; }
}

@media (min-width: 961px) and (max-height: 780px) {
  body[data-page="presentation"] .site-header { min-height: 72px; }
  .presentation-main { padding-top: 12px; }
  .deck-topline { margin-bottom: 12px; }
  .slide-main { padding: 24px 32px; }
  .slide-main > h2, .slide-value h2 { margin-top: 12px; font-size: 38px; }
  .presentation-enhanced .slide-main { min-height: 440px; }
  .slide-diagram-scroll { margin-top: 16px; }
  .slide-architecture { max-height: 205px; }
  .slide-title-break { display: none; }
  .slide-process, .research-composition, .slide-version-flow, .verification-split { margin-top: 20px; }
  .slide-bottom-line { margin-top: 18px; padding-top: 12px; }
  .slide-main .actions { margin-top: 20px; }
  .presentation-enhanced .site-footer { margin-top: 10px; padding-block: 12px; }
  .presentation-controls { padding-block: 12px; }
  .two-track > div { padding: 16px 20px; }
}

/* Contract colors stay intact; tinted surfaces use accessible text variants. */
.workspace-invitation, .document-review, .document-example, .slide-notes,
.two-track > div, .execution-lane, .callout, .flow-detail, .calculation-strip { --muted: var(--muted-on-tint); }
.workspace-invitation .kicker, .callout h3,
[data-toc-link][aria-current="location"], .flow-steps button[aria-pressed="true"],
.presentation-tools button[aria-pressed="true"], .overview-grid button:hover span,
.overview-grid button[aria-current="true"] span { color: var(--mint-on-tint); }

/* Shared navigation remains usable without a script at narrow widths. */
@media (max-width: 1180px) {
  .hero-copy h1 { font-size: 56px; }
  .document-sheet { padding-inline: 22px; }
  .case-editorial-grid { gap: 36px; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); }
  .case-side-link h3 { font-size: 23px; }
  .workspace-principle { gap: 30px; }
}
@media (max-width: 1100px) {
  .home-hero { grid-template-columns: 1fr; gap: 40px; padding-block: 64px; }
  .hero-copy { max-width: 740px; }
  .hero-description { max-width: 620px; }
  .work-document { width: 90%; max-width: 600px; justify-self: end; }
  .document-sheet h2 { font-size: 31px; }
  .workspace-principle { grid-template-columns: 1.2fr 1fr; }
  .workspace-principle > .fine { grid-column: 1 / -1; padding-left: 0; padding-top: 18px; border-left: 0; border-top: 1px solid var(--line); }
  .workspace-principle > .fine br { display: none; }
  .workspace-flow { gap: 48px; }
  .featured-case-caption { grid-template-columns: 1fr; gap: 16px; }
}
@media (max-width: 760px) {
  .site-header { min-height: 0; padding-top: 20px; gap: 14px 16px; }
  .site-nav { align-items: center; gap: 8px 20px; }
  .site-nav summary { min-height: 48px; }
  .site-nav details a { min-height: 44px; }
  .header-preview { justify-self: end; font-size: 11px; }
  .home-hero { padding-block: 52px 44px; gap: 40px; }
  .hero-copy h1 { margin-top: 22px; font-size: 46px; }
  .hero-description { margin-top: 24px; font-size: 17px; }
  .hero-copy .actions { gap: 6px; }
  .hero-copy .button { min-height: 52px; padding-inline: 18px; font-size: 14px; }
  .preview-notice { margin-top: 24px; }
  .work-document { width: 100%; max-width: 540px; justify-self: center; }
  .workspace-principle { grid-template-columns: 1fr; gap: 22px; padding-block: 28px; }
  .workspace-principle h2 { font-size: 24px; }
  .workspace-principle > p:not(.fine) { font-size: 16px; }
  .home-cases { padding-top: 56px; }
  .home-cases .section-topline { margin-bottom: 24px; }
  .case-editorial-grid { grid-template-columns: 1fr; gap: 34px; }
  .featured-case-caption { grid-template-columns: 1fr 1fr; gap: 20px; }
  .featured-case-caption h3 { font-size: 25px; }
  .featured-case-caption > p { font-size: 13px; }
  .case-side-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 28px; }
  .case-list-label { grid-column: 1 / -1; }
  .case-side-item + .case-side-item { border-top: 0; }
  .case-side-link h3 { font-size: 24px; }
  .workspace-flow { padding-block: 56px; gap: 36px; }
  .workspace-flow .narrative-flow li { gap: 22px; padding-block: 24px; }
  .workspace-flow .narrative-flow h3 { font-size: 21px; }
  .workspace-invitation { flex-direction: column; align-items: flex-start; gap: 28px; padding: 32px; }
  .workspace-invitation h2 { font-size: 32px; }
  .site-footer > p:last-child { text-align: left; }
}
@media (max-width: 480px) {
  .site-nav { gap: 4px 18px; }
  .site-nav a, .site-nav summary { font-size: 13px; }
  .hero-copy h1 { font-size: clamp(30px, 9.5vw, 38px); line-height: 1.3; letter-spacing: -.055em; }
  .hero-copy .kicker { font-size: 10px; }
  .hero-description { font-size: 16px; }
  .hero-copy .button { gap: 14px; padding-inline: 14px; }
  .preview-notice > p + p { font-size: 12px; }
  .document-stage { min-height: 0; padding: 22px 16px 104px 8px; }
  .document-stage::before { inset: 0 0 28px 24px; border-top-left-radius: 72px; }
  .document-back-sheet { inset: 15px 28px 80px 19px; transform: rotate(-3deg); }
  .document-sheet { padding: 18px; }
  .document-sheet h2 { font-size: 26px; }
  .document-fields > div { grid-template-columns: 30px 1fr; gap: 12px; }
  .document-review { right: 0; bottom: 8px; width: 240px; padding: 16px; transform: rotate(1deg); }
  .document-margin-note { right: 2px; top: 65px; font-size: 7px; }
  .work-document figcaption { margin-left: 8px; font-size: 10px; }
  .featured-case-caption { grid-template-columns: 1fr; }
  .featured-case-caption h3 br { display: none; }
  .poster-play { bottom: 12px; left: 12px; padding: 8px 12px; gap: 10px; min-height: 44px; font-size: 12px; }
  .case-side-list { grid-template-columns: 1fr; }
  .case-side-item + .case-side-item { border-top: 1px solid var(--line); }
  .case-side-link { padding-block: 24px; }
  .case-side-link h3 br { display: none; }
  .workspace-invitation { padding: 28px 24px; }
  .workspace-invitation h2 br { display: initial; }
  .invitation-action { width: 100%; text-align: left; }
  .invitation-action .button { width: 100%; justify-content: space-between; }
  .site-footer { margin-top: 44px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}

@page { margin: 16mm; }
@media print {
  :root { font-size: 11pt; background: #ffffff; color: #17233a; }
  body { background: #ffffff; }
  .container { width: 100%; max-width: none; }
  .site-header, .manual-sidebar, .skip-link, .actions, .tab-list,
  .presentation-controls, .presentation-shortcuts, .presentation-status,
  .deck-topline, .copy-status, .overview-dialog, button, .closing-line,
  .slide-context-link, noscript { display: none !important; }
  .page-intro { padding-top: 0; }
  h1 { font-size: 30pt; }
  h2 { font-size: 23pt; }
  h3 { font-size: 16pt; }
  h1, h2, h3, h4 { break-after: avoid; }
  p { orphans: 3; widows: 3; }
  .manual-layout, .editorial-section, .architecture-boundaries { display: block; }
  .manual-chapter { padding-bottom: 24px; }
  .manual-chapter + .manual-chapter { padding-top: 24px; }
  .manual-chapter > h2 { font-size: 23pt; }
  .manual-content, .slide-main { max-width: none; }
  .table-scroll, .diagram-scroll, .slide-diagram-scroll { overflow: visible; }
  table { min-width: 0; font-size: 10pt; }
  th, td { padding: 10px; }
  tr, .copy-block, .callout, .operation-pair, .verification-ledger > div { break-inside: avoid; }
  thead { display: table-header-group; }
  .architecture-panel[hidden], .presentation-enhanced .slide[hidden],
  .presentation-enhanced .slide-notes[hidden] { display: block !important; }
  .slide { break-before: page; break-after: page; margin: 0; border: 0; }
  .slide:first-child { break-before: auto; }
  .slide-main, .presentation-enhanced .slide-main { min-height: 0; padding: 0; }
  .slide-main > h2, .slide-value h2 { font-size: 30pt; }
  .slide-value { display: grid; grid-template-columns: 1fr 1fr; }
  .slide-notes { margin-top: 24px; padding: 20px 0 0; background: #ffffff; }
  .slide-notes p { font-size: 10pt; line-height: 1.6; }
  .slide-architecture, .diagram-scroll svg { min-width: 0; max-height: none; width: 100%; }
  .flow-enhanced .flow-static-label, .flow-enhanced .flow-description { display: block; }
  .flow-enhanced .flow-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .flow-detail { display: none !important; }
  .system-map { break-inside: avoid; }
  .hero-diagram svg { display: block; }
  .hero-mobile-tracks { display: none; }
  details:not([open]) > :not(summary) { display: block !important; }
  details::details-content { content-visibility: visible; display: block; }
  .site-footer { margin-top: 24px; padding-block: 12px; font-size: 9pt; }
  .presentation-enhanced .site-footer { margin-top: 0; }
}

.slide-media-link { display: block; position: relative; }
.slide-media-link:focus-visible { outline: 3px solid var(--mint); outline-offset: 3px; border-radius: var(--radius); }
.slide-media-play { position: absolute; inset: 0; display: grid; place-items: center; color: #ffffff; font-size: 34px;
  background: linear-gradient(180deg, rgba(8,127,112,.12), rgba(8,127,112,.32)); border-radius: var(--radius); }
.slide-media-link:hover .slide-media-play, .slide-media-link:focus-visible .slide-media-play { background: linear-gradient(180deg, rgba(8,127,112,.2), rgba(8,127,112,.42)); }