:root { --dark-line: #343841; --lms-scene-inset: 96px; --motion-demo-hint-duration: 960ms; --motion-demo-hint-delay: 1800ms; --motion-demo-hint-pause: 4000ms; --motion-demo-hint-distance: 2px; --motion-demo-hint-angle: 5deg; }
/* The portfolio stylesheet is the authority for chrome, typography and motion. */
.lms-case { padding-top: 64px; }
.lms-case button, .lms-case select { font: inherit; cursor: pointer; }
.lms-case button { border: 0; }
.lms-case h1, .lms-case h2 { text-wrap: balance; }
.intro { padding-block: clamp(36px, 4vw, 56px) 32px; }
.intro h1 { max-width: 1000px; font-size: clamp(36px, 5vw, 64px); line-height: 1.04; letter-spacing: -.032em; font-weight: 650; }
.intro-copy { margin-top: 24px; max-width: 76ch; color: var(--ink-soft); font-size: clamp(18px, 1.7vw, 22px); line-height: 1.5; }
.project-role { margin-top: 20px; font-size: 17px; line-height: 1.5; font-weight: 600; color: var(--ink); }
/* Product-first opening; the app stays English and the surrounding case uses
   the portfolio's typography/surfaces, not the application's design system. */
.intro { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: clamp(32px, 4vw, 64px); align-items: center; padding-block: 48px; }
.intro h1 { font-size: clamp(36px, 4vw, 58px); }
.intro-copy { font-size: 19px; }
.interface-figure { min-width: 0; margin: 0; }
.interface-window { display: block; overflow: hidden; border-radius: 12px; background: #e3e5eb; box-shadow: 0 20px 48px #1118271f; }
.interface-window img { display: block; width: 100%; height: auto; }
.window-chrome { display: flex; gap: 6px; align-items: center; height: 28px; padding-inline: 12px; background: #e3e5eb; }
.window-chrome i { width: 6px; height: 6px; border-radius: 50%; background: #89919e; }
.interface-figure figcaption { margin-top: 16px; color: var(--ink-soft); font-size: 14px; line-height: 1.5; }
.interface-window { cursor: zoom-in; }
.case-media-viewer { width: min(1600px, calc(100% - 32px)); max-width: none; max-height: calc(100dvh - 32px); padding: 0; border: 0; border-radius: 12px; background: var(--surface); color: var(--ink); }
.case-media-viewer::backdrop { background: #08090bdd; }
.case-media-bar { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 12px 20px; }
.case-media-bar h2 { font-size: 18px; line-height: 1.4; }
.case-media-bar button { min-height: 44px; padding: 8px 12px; border: 0; border-radius: 8px; font: inherit; font-weight: 600; color: var(--ink); background: var(--bg); cursor: pointer; }
.case-media-bar button:hover { background: #e3e5eb; }
.case-media-canvas { max-height: calc(100dvh - 120px); overflow: auto; overscroll-behavior: contain; }
.case-media-canvas img { display: block; width: 100%; min-width: 960px; height: auto; }
body.has-image-preview { overflow: hidden; }
/* The case remains complete on compact screens; the desktop application is
   mounted only by shell.js when both dimensions have enough room. */
.mobile-case-preview { max-width: 760px; margin-inline: auto; padding: 36px 4px 48px; color: #fff; --ink: #fff; --ink-soft: var(--dark-soft); --blue: var(--blue-light); scroll-margin-top: 90px; }
.mobile-case-notice { padding-bottom: 32px; border-bottom: 1px solid var(--dark-line); }
.mobile-case-notice h2 { font-size: clamp(26px, 4vw, 36px); line-height: 1.15; letter-spacing: -.025em; }
.mobile-case-notice p, .mobile-episode > p { margin-top: 16px; color: var(--dark-soft); font-size: 17px; line-height: 1.6; max-width: 65ch; }
.copy-demo-link, .mobile-decision-link { display: inline-flex; align-items: center; gap: 12px; min-height: 44px; padding-block: 10px; background: none; color: var(--blue-light); text-decoration: underline; text-underline-offset: 5px; font-size: 15px; font-weight: 550; }
.copy-demo-link { margin-top: 12px; padding-inline: 0; }
.copy-demo-link:hover, .mobile-decision-link:hover { color: #fff; }
.mobile-case-notice .copy-demo-status { margin: 0; font-size: 14px; }
#copy-demo-fallback { width: 100%; min-height: 44px; margin-top: 12px; padding: 8px 12px; color: #fff; background: var(--dark-surface); border: 1px solid var(--dark-line); border-radius: 6px; font: inherit; }
.mobile-episode { padding-block: 36px; border-bottom: 1px solid var(--dark-line); }
.mobile-episode h3 { font-size: clamp(26px, 4vw, 32px); line-height: 1.15; letter-spacing: -.025em; font-weight: 600; text-wrap: balance; }
.mobile-episode figure { margin: 24px 0 0; }
.mobile-episode figcaption { margin-bottom: 12px; color: #fff; font-size: 15px; font-weight: 550; line-height: 1.5; }
.mobile-screen-link { display: block; overflow: hidden; border-radius: 10px; background: var(--dark-surface); cursor: zoom-in; }
.mobile-screen-link img { display: block; width: 100%; height: auto; }
.screen-enlarge { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 44px; padding: 10px 14px; font-size: 14px; color: var(--dark-soft); }
.mobile-screen-link:hover .screen-enlarge { color: #fff; }
.mobile-decision-link { margin-top: 16px; }
.mobile-evidence-note { margin-top: 28px; max-width: 65ch; color: var(--dark-soft); font-size: 14px; line-height: 1.6; }
html:not(.desktop-experience) .intro-product,
html:not(.desktop-experience) .workflow-scene > .interface-figure { display: none; }
html:not(.desktop-experience) .intro,
html:not(.desktop-experience) .workflow-scene { grid-template-columns: 1fr; }
html:not(.desktop-experience) .workflow-scene-reverse > div { grid-column: auto; }
html:not(.desktop-experience) .intro-story { max-width: 760px; }
.mobile-decision-link { scroll-margin-top: 100px; }
.continuity-map { margin: 36px 0; padding-block: 32px; border-block: 1px solid var(--line); }
.transition-path { display: grid; grid-template-columns: 1fr minmax(80px, 1fr) 1fr; align-items: center; gap: 24px; color: var(--ink); font-size: clamp(18px, 2.4vw, 28px); font-weight: 600; }
.transition-path > span:last-child { text-align: right; }
.transition-path svg { width: 100%; height: 24px; color: var(--blue); }
.continuity-records { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 36px; }
.continuity-records > div { display: flex; gap: 16px; align-items: center; }
.continuity-records svg { width: 40px; height: 40px; color: var(--blue); }
.continuity-records strong { font-size: 18px; color: var(--ink); font-weight: 550; }
.workflow-scene { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); align-items: center; gap: clamp(32px, 4vw, 64px); margin-bottom: 56px; }
.workflow-scene-reverse { grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr); }
.workflow-scene-reverse > figure { grid-column: 1; grid-row: 1; }
.workflow-scene-reverse > div { grid-column: 2; }
.case-copy .workflow-scene .workflow { grid-template-columns: 1fr; margin-bottom: 0; }
.workflow-scene .workflow li { padding-block: 12px; }
@media (max-width: 1000px) { .intro { grid-template-columns: 1fr; } .intro-product { max-width: 760px; } }
@media (max-width: 860px) {
  .workflow-scene { grid-template-columns: 1fr; }
  .workflow-scene-reverse > figure, .workflow-scene-reverse > div { grid-column: auto; grid-row: auto; }
  .continuity-records { grid-template-columns: 1fr; }
}
@media (max-width: 600px) { .transition-path { gap: 12px; grid-template-columns: 1fr 48px 1fr; font-size: 18px; } }
.system-evidence h2 { max-width: 26ch; }
.evidence-intro { max-width: 70ch; margin-top: 24px; color: var(--ink-soft); font-size: 18px; line-height: 1.65; }
.evidence-build { display: grid; grid-template-columns: minmax(0, 1.8fr) minmax(280px, 1fr); gap: clamp(32px, 5vw, 64px); margin-block: 44px 52px; }
.system-evidence figure { min-width: 0; margin: 0; }
.system-evidence h3 { font-size: 20px; line-height: 1.3; margin-bottom: 20px; font-weight: 600; }
.system-evidence figure a { display: block; }
.system-evidence img { display: block; width: 100%; height: auto; }
.evidence-states figure + figure { margin-top: 24px; }
.evidence-states figcaption { margin-bottom: 10px; font-size: 15px; font-weight: 600; }
.evidence-states figcaption span { color: var(--ink-soft); font-weight: 400; }
@font-face { font-family: Evidence Inter; src: url('./assets/InterVariable.woff2') format('woff2'); font-weight: 100 900; font-display: swap; }
.evidence-states { container-type: inline-size; container-name: evidence-states; }
/* Source colours/type are scoped here; consistent action geometry is site-only. */
.evidence-card {
  --evidence-surface: #fff; --evidence-border: #dcdfe6; --evidence-ink: #1b1d2a;
  --evidence-muted: #5c6372; --evidence-primary: #0e7c75;
  --evidence-padding: 2.439024cqw; --evidence-gap: 2.195122cqw;
  --evidence-action-width: 17.560976cqw;
  display: grid; grid-template-columns: 1.95122cqw minmax(0, 1fr) var(--evidence-action-width);
  align-items: center; gap: var(--evidence-gap); height: 19.02439cqw;
  padding: var(--evidence-padding); border: 1px solid var(--evidence-border);
  border-radius: .97561cqw; background: var(--evidence-surface); color: var(--evidence-ink);
  font-family: Evidence Inter, sans-serif; font-synthesis: none;
}
.evidence-card-icon { display: grid; place-items: center; height: 6.341463cqw; border-radius: 999px; background: rgba(99,91,219,.11); color: #635bdb; font-size: 2.317073cqw; line-height: 1; font-weight: 600; }
.evidence-card-info { display: grid; gap: .731707cqw; min-width: 0; }
.evidence-card p { margin: 0; white-space: nowrap; }
.evidence-card-status, .evidence-card-meta { color: var(--evidence-muted); font-size: max(12px, 1.585366cqw); line-height: max(18px, 2.195122cqw); }
.evidence-card-title { font-size: max(17px, 2.317073cqw); line-height: max(22px, 2.926829cqw); font-weight: 600; }
.evidence-card-progress { height: .97561cqw; background: #f8f8fb; border-radius: 999px; overflow: hidden; }
.evidence-card-progress > span { display: block; width: 0; height: 100%; background: var(--evidence-primary); border-radius: inherit; }
.evidence-card[data-learning-state="in-progress"] .evidence-card-progress > span { width: 65%; }
.evidence-card[data-learning-state="completed"] .evidence-card-progress > span { width: 100%; }
.evidence-card-action { display: grid; place-items: center; width: var(--evidence-action-width); height: 4.878049cqw; border-radius: .731707cqw; background: var(--evidence-primary); color: #fff; font-size: max(13px, 1.707317cqw); line-height: max(20px, 2.439024cqw); font-weight: 600; white-space: nowrap; }
/* Keep all states aligned, but reflow the illustration instead of shrinking its text. */
@container evidence-states (max-width: 640px) {
  .evidence-card { --evidence-padding: 16px; --evidence-gap: 14px; --evidence-action-width: 144px; grid-template-columns: 16px minmax(0, 1fr); grid-template-rows: 136px 40px; height: 224px; border-radius: 8px; }
  .evidence-card-icon { height: 52px; font-size: 19px; }
  .evidence-card-info { grid-template-rows: 20px 44px 40px 8px; gap: 8px; }
  .evidence-card-status, .evidence-card-meta { font-size: 12px; line-height: 20px; }
  .evidence-card-title { font-size: 18px; line-height: 22px; }
  .evidence-card-title, .evidence-card-meta { white-space: normal; }
  .evidence-card-progress { height: 8px; }
  .evidence-card-action { grid-column: 2; justify-self: end; height: 40px; font-size: 14px; line-height: 20px; border-radius: 6px; }
}
.evidence-sources { margin-top: 16px; color: var(--ink-soft); font-size: 14px; line-height: 1.6; }
.evidence-sources summary { min-height: 44px; display: list-item; align-content: center; cursor: pointer; }
.evidence-sources ul { display: flex; flex-wrap: wrap; gap: 8px 24px; padding: 0; list-style: none; }
.evidence-sources a { display: inline-flex; align-items: center; min-height: 44px; text-decoration: underline; text-underline-offset: 4px; }
.evidence-bindings p, .evidence-placement-copy p { color: var(--ink-soft); font-size: 17px; line-height: 1.6; }
.evidence-bindings dl { margin-block: 20px; }
.evidence-bindings dl > div { border-top: 1px solid var(--line); padding-block: 12px; }
.evidence-bindings dt { font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.evidence-bindings dd { font-size: 14px; line-height: 1.6; overflow-wrap: anywhere; }
.evidence-bindings dd span { display: block; color: var(--ink-soft); margin-top: 2px; }
.evidence-bindings code { font-size: 12px; }
.evidence-bindings .evidence-caption, .evidence-screen figcaption, .evidence-note { color: var(--ink-soft); font-size: 14px; line-height: 1.6; }
.evidence-placement { display: grid; grid-template-columns: minmax(240px, 1fr) minmax(0, 2fr); gap: clamp(32px, 5vw, 64px); border-top: 1px solid var(--line); padding-top: 40px; margin-bottom: 28px; align-items: center; }
.evidence-placement-copy p + p { margin-top: 20px; }
.evidence-screen-link { position: relative; }
/* Native frame 1440×900; linked instance at (156,356), size 820×156. */
.evidence-instance-outline { position: absolute; left: 10.833333%; top: 39.555556%; width: 56.944444%; height: 17.333333%; outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 4px; pointer-events: none; }
.evidence-screen figcaption { margin-top: 12px; }
.evidence-note { max-width: 85ch; }
.qa-example { margin-top: 28px; padding-block: 12px; border-block: 1px solid var(--line); }
.qa-example summary { cursor: pointer; min-height: 44px; padding-block: 10px; color: var(--ink); font-size: 18px; font-weight: 600; }
.qa-example dl { display: grid; grid-template-columns: 1fr 1fr; gap: 24px 40px; padding-block: 16px; }
.qa-example dt { color: var(--ink); font-weight: 600; margin-bottom: 8px; }
.qa-example dd { font-size: 16px; }
.decision .functional-acceptance { grid-column: 2; margin-top: 24px; }
@media (max-width: 860px) { .evidence-build, .evidence-placement { grid-template-columns: 1fr; gap: 32px; } .evidence-bindings dl { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; } }
@media (max-width: 420px) { .evidence-bindings dl { grid-template-columns: 1fr; } }
@media (max-width: 600px) { .qa-example dl { grid-template-columns: 1fr; } }
.case-jumps { display: flex; gap: 8px 28px; flex-wrap: wrap; margin-top: 20px; }
.case-jumps a { display: inline-flex; align-items: center; min-height: 44px; color: var(--blue); text-decoration: underline; text-underline-offset: 5px; font-weight: 600; }
.case-nav { display: flex; flex-wrap: wrap; gap: 8px 32px; margin-top: 36px; padding-top: 16px; border-top: 1px solid var(--line); }
.case-nav a, .case-return { display: inline-flex; align-items: center; min-height: 44px; color: var(--blue); font-weight: 600; text-decoration: underline; text-underline-offset: 5px; }
.case-return { margin-top: 24px; }
.case-overview .summary-title { max-width: none; margin-top: 40px; font-size: clamp(26px, 2.5vw, 32px); }
.project-meta { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px 40px; padding-top: 36px; border-top: 1px solid var(--line); margin-top: 48px; }
.project-meta dt { font-size: 14px; font-weight: 650; margin-bottom: 10px; }
.project-meta dd { color: var(--ink-soft); font-size: 15px; line-height: 1.6; }
.project-meta > div:last-child { grid-column: span 2; }
.case-summary { margin-top: 24px; padding-top: 28px; border-top: 1px solid var(--line); display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px 40px; }
.case-summary dt { font-size: 18px; font-weight: 600; margin-bottom: 12px; }
.case-summary dd { color: var(--ink-soft); font-size: 17px; line-height: 1.6; }
@media (max-width: 860px) { .case-summary { grid-template-columns: 1fr; } }
.chapter { padding-block: var(--section-pad); background: var(--surface); }
.chapter + .chapter:not(.chapter-dark):not(.chapter-tour) { border-top: 1px solid var(--line); }
.chapter-grid { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: clamp(36px, 6vw, 88px); align-items: start; }
.chapter h2 { max-width: 21ch; font-size: clamp(32px, 3.6vw, 48px); line-height: 1.1; letter-spacing: -.03em; font-weight: 650; }
.case-copy, .contribution-copy { color: var(--ink-soft); font-size: 18px; line-height: 1.65; min-width: 0; }
.case-copy { max-width: 65ch; }
.case-copy > * + *, .decision > * + * { margin-top: 24px; }
.case-copy ul, .case-copy ol { padding-left: 1.25em; }
.case-copy li + li { margin-top: 12px; }
.case-copy li::marker { color: var(--blue); }
.case-copy h3, .decision h3 { color: var(--ink); font-size: clamp(22px, 2.2vw, 28px); line-height: 1.25; letter-spacing: -.02em; font-weight: 600; }
.chapter-dark, .chapter-tour { background: var(--dark); color: white; --ink: #fff; --ink-soft: var(--dark-soft); --line: #343841; --blue: var(--blue-light); }
.chapter-dark :focus-visible, .chapter-tour :focus-visible { outline-color: var(--blue-light); }
.chapter-workflows { background: var(--bg); }
.chapter-workflows .chapter-grid { display: block; }
.chapter-workflows h2 { margin-bottom: 56px; }
.chapter-workflows .case-copy { max-width: none; }
.case-copy .workflow { list-style: none; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 36px; padding: 0; counter-reset: workflow; margin-block: 28px 48px; }
.workflow li, .workflow li + li { counter-increment: workflow; position: relative; margin: 0; padding: 22px 0 22px 44px; border-top: 1px solid var(--line); }
.workflow li::before { content: counter(workflow, decimal-leading-zero); position: absolute; left: 0; color: var(--blue); font-size: 15px; font-weight: 650; padding-top: 4px; }
.chapter-workflows .case-copy > p { max-width: 65ch; }
.chapter-tour { padding-bottom: 40px; }
.design-note h2 { margin-bottom: 56px; }
.decision { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); column-gap: clamp(36px, 6vw, 88px); padding-block: 36px; border-top: 1px solid var(--line); }
.decision h3 { grid-row: span 2; }
.decision p { margin-top: 0; max-width: 65ch; }
.decision p + p { margin-top: 20px; }
.about { padding-bottom: 36px; }
.overview-copy { max-width: 65ch; color: var(--ink); font-size: clamp(22px, 2.3vw, 29px); line-height: 1.4; letter-spacing: -.015em; }
.context-essay .chapter-grid, .problem-flow .chapter-grid, .quality-timeline .chapter-grid, .capability-map .chapter-grid, .scope-essay .chapter-grid { display: block; }
.context-essay h2, .problem-flow h2, .quality-timeline h2, .capability-map h2, .scope-essay h2 { max-width: 28ch; margin-bottom: 40px; }
.context-essay .case-copy, .scope-essay .case-copy { display: grid; grid-template-columns: 1fr 1fr; gap: 28px 64px; max-width: none; }
.context-essay .case-copy > p:first-child { grid-column: 1 / -1; max-width: 65ch; font-size: clamp(23px, 2.4vw, 30px); line-height: 1.45; color: var(--ink); }
.context-essay .case-copy > p, .scope-essay .case-copy > p { margin: 0; }
.context-essay .case-copy > .case-tradeoffs { grid-column: 1 / -1; max-width: 75ch; padding-top: 28px; border-top: 1px solid var(--line); }
.context-essay .case-copy > .case-choice { grid-column: 1 / -1; max-width: 65ch; color: var(--ink); font-size: clamp(22px, 2.2vw, 28px); line-height: 1.45; font-weight: 550; }
.scope-essay .case-copy > p:last-child { grid-column: 1 / -1; max-width: 75ch; border-top: 1px solid var(--line); padding-top: 28px; }
.scope-essay .case-copy > .case-reconsider { grid-column: 1 / -1; max-width: 75ch; }
.role-ledger .case-copy { max-width: none; }
.role-ledger ul, .capability-map ul { display: grid; grid-template-columns: 1fr 1fr; list-style: none; gap: 0 32px; padding: 0; }
.role-ledger li, .role-ledger li + li, .capability-map li, .capability-map li + li { margin: 0; padding-block: 18px; border-top: 1px solid var(--line); }
.role-ledger .case-copy > p:last-child { padding-top: 28px; border-top: 1px solid var(--line); font-size: 16px; }
.problem-flow .case-copy { max-width: none; }
.problem-flow .case-copy > p { max-width: 70ch; }
.output-ledger { background: var(--bg); }
.output-ledger .output-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 36px 64px; max-width: none; margin-top: 40px; }
.output-grid > div { margin: 0; border-top: 1px solid var(--line); padding-top: 24px; }
.output-grid h3 { font-size: clamp(22px, 2.2vw, 28px); }
.output-grid p { margin-top: 20px; font-size: 16px; }
.output-ledger ul { padding: 0; list-style: none; }
.output-ledger li, .output-ledger li + li { margin: 0; padding-block: 16px; border-bottom: 1px solid var(--line); }
.output-feedback { max-width: 75ch; margin-top: 40px; padding-top: 28px; border-top: 1px solid var(--line); color: var(--ink); font-size: 18px; line-height: 1.65; }
.quality-timeline .case-copy { max-width: none; }
.quality-timeline .case-copy > p { max-width: 70ch; }
.quality-timeline ol { display: grid; grid-template-columns: 1fr 1fr; counter-reset: quality; list-style: none; padding: 0; gap: 0 48px; margin-block: 32px; }
.quality-timeline li, .quality-timeline li + li { counter-increment: quality; position: relative; margin: 0; padding: 20px 0 20px 48px; border-top: 1px solid var(--line); }
.quality-timeline li::before { content: counter(quality, decimal-leading-zero); position: absolute; left: 0; color: var(--blue); }
.ai-editorial .case-copy > p:first-child { font-size: 22px; line-height: 1.5; color: var(--ink); }
.capability-map .case-copy { max-width: none; }
.capability-map ul { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.measurement-list.chapter { padding-block: clamp(48px, 5vw, 72px); }
.measurement-list h2 { font-size: clamp(26px, 2.5vw, 32px); }
.measurement-list .case-copy { font-size: 17px; }
.measurement-list ul { list-style: none; padding: 0; }
.measurement-list li, .measurement-list li + li { margin: 0; padding: 10px 0 10px 20px; position: relative; border-bottom: 1px solid var(--line); }
.measurement-list li::before { content: ''; position: absolute; width: 6px; height: 6px; border: 1px solid var(--blue); left: 0; top: 21px; }
.desktop-notice { max-width: 1440px; margin-inline: auto; display: flex; align-items: flex-start; gap: 16px; padding: 20px 16px; border-bottom: 1px solid var(--dark-line); }
.desktop-notice > svg { flex: 0 0 24px; width: 24px; height: 24px; color: var(--blue-light); }
.desktop-notice strong { display: block; color: white; font-size: 17px; line-height: 1.4; }
.desktop-notice p { max-width: 75ch; margin-top: 6px; color: var(--dark-soft); font-size: 15px; line-height: 1.5; }
.desktop-notice .desktop-notice-action { display: none; }
#demo-controls, #contribution-title, .chapter h2 { scroll-margin-top: 100px; }
@media (max-width: 860px) {
  .capability-map ul { grid-template-columns: 1fr 1fr; }
  .chapter-grid, .decision { grid-template-columns: 1fr; gap: 28px; }
  .decision .functional-acceptance { grid-column: auto; }
  .output-ledger .output-grid { grid-template-columns: 1fr; }
  .chapter h2 { max-width: 24ch; }
  .case-copy, .decision p { max-width: 70ch; }
  .decision h3 { grid-row: auto; }
  .decision p + p { margin-top: 0; }
  .case-copy .workflow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 600px) {
  .intro { padding-block: 32px 24px; }
  .intro-copy { margin-top: 20px; font-size: 17px; }
  .project-meta { grid-template-columns: 1fr; gap: 24px; }
  .project-meta > div:last-child { grid-column: auto; }
  .chapter { padding-block: 64px; }
  .chapter-tour { padding-bottom: 28px; }
  .case-copy, .contribution-copy { font-size: 17px; }
  .case-copy .workflow { grid-template-columns: 1fr; }
  .chapter-workflows h2, .design-note h2 { margin-bottom: 36px; }
  .context-essay .case-copy, .scope-essay .case-copy, .role-ledger ul, .capability-map ul, .quality-timeline ol { grid-template-columns: 1fr; }
  .context-essay .case-copy > p:first-child, .scope-essay .case-copy > p:last-child { grid-column: auto; }
}
@media print {
  .theatre, .contact-section, .site-header, .mobile-menu, .skip-link { display: none; }
  .chapter, .intro { background: white; color: black; --ink-soft: #222; --ink: #000; padding-block: 24px; }
  .chapter-grid, .intro-copy, .decision { display: block; }
}
button:disabled { cursor: wait; opacity: .55; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 4px; }
svg, .icon { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; flex: 0 0 auto; }
.case-jumps { display: flex; flex-wrap: wrap; gap: 8px 24px; margin-top: 24px; }
.case-jumps a { color: var(--blue); text-decoration: underline; text-underline-offset: 4px; display: inline-flex; align-items: center; min-height: 44px; }
.theatre { background: var(--dark); color: var(--surface); padding: 12px clamp(16px, 3vw, 48px) 0; }
.demo { max-width: 1440px; margin: auto; }
.comparison-toolbar { min-height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 14px 16px; }
.segment { display: flex; gap: 8px; padding: 4px; background: var(--dark-surface); border-radius: 12px; flex-shrink: 0; }
.segment button { min-height: 48px; display: inline-flex; gap: 8px; align-items: center; justify-content: center; padding: 10px 18px; border-radius: 8px; color: var(--dark-soft); background: transparent; font-size: 15px; font-weight: 600; transition: background-color var(--motion-feedback-hover) ease-out, color var(--motion-feedback-hover) ease-out; }
.segment button > span { font-size: 12px; font-weight: 400; }
.segment button[aria-pressed="true"] { background: var(--surface); color: var(--ink); }
.segment button:hover:not([aria-pressed="true"]) { background: #282b32; color: var(--surface); }
.segment button:active { transform: scale(.98); }
@media (prefers-reduced-motion: reduce) {
  .segment button { transition: none; }
  .segment button:active { transform: none; }
}
.segment svg { width: 18px; height: 18px; }
.demo-actions { display: flex; gap: 8px; align-items: center; }
.role-control { position: relative; display: flex; gap: 10px; align-items: center; font-size: 13px; color: var(--dark-soft); margin-right: 14px; }
.role-control::after { content: ''; pointer-events: none; position: absolute; right: 15px; top: calc(50% - 5px); width: 7px; height: 7px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; transform: rotate(45deg); }
.role-control select { appearance: none; -webkit-appearance: none; color-scheme: dark; min-height: 44px; max-width: 180px; padding: 8px 36px 8px 12px; color: var(--surface); background: var(--dark-surface); border: 1px solid var(--dark-line); border-radius: 8px; font-size: 14px; }
.quiet-button { display: inline-flex; gap: 8px; align-items: center; justify-content: center; min-height: 44px; padding: 8px 12px; border-radius: 8px; color: var(--dark-soft); background: transparent; font-size: 14px; white-space: nowrap; }
.quiet-button:hover, .quiet-button[aria-expanded="true"] { color: var(--surface); background: var(--dark-surface); }
.icon-button { width: 44px; padding: 10px; flex-shrink: 0; }
.theatre :focus-visible { outline-color: #76b7ff; }
.frame-meta { min-height: 56px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-inline: 16px; color: var(--dark-soft); font-size: 13px; border-top: 1px solid var(--dark-line); }
.frame-options { display: flex; align-items: center; gap: 12px; }
.frame-options button { text-decoration: underline; text-underline-offset: 4px; padding-inline: 12px; }
.frame-stage { position: relative; min-height: 240px; }
.macbook-hardware { display: none; }
@media (min-width: 701px) {
  /* Ordinary presentation only. Expanded mode and the tour retain the original
     full-window coordinate system and never inherit the hardware constraints. */
  .demo:not(.expanded) { width: min(100%, calc((100svh - var(--lms-scene-inset)) * 1.637485)); }
  .demo:not(.expanded) .frame-stage { aspect-ratio: 3984 / 2433; min-height: 0; }
  .demo:not(.expanded) .macbook-hardware { display: block; position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 4; }
  .macbook-frame { position: absolute; left: -11.4207%; top: -19.5232%; width: 122.8163%; max-width: none; height: auto; }
  .demo:not(.expanded) .viewport { position: absolute; left: 9.0896%; top: calc(4.6% + var(--demo-controls-height, 60px)); width: 81.8775%; }
}
.viewport { width: 100%; overflow: auto; background: var(--dark-surface); overscroll-behavior-inline: contain; scrollbar-color: #737985 var(--dark-surface); }
.canvas { width: 1440px; height: 900px; overflow: hidden; position: relative; margin-inline: auto; }
iframe { display: block; width: 1440px; height: 900px; border: 0; background: #f2f3f7; transform-origin: 0 0; }
.demo-caption { min-height: 64px; padding-block: 18px; display: flex; align-items: center; justify-content: flex-end; gap: 24px; color: var(--dark-soft); font-size: 13px; }
.demo-caption > span:last-child { max-width: 85ch; line-height: 1.6; }
.mobile-hint { display: none; }
.about { border-top: 1px solid var(--line); }
.about summary { cursor: pointer; min-height: 60px; padding-block: 18px; font-size: 16px; font-weight: 550; }
.about-content { max-width: 75ch; color: var(--ink-soft); padding: 6px 0 20px; line-height: 1.7; }
.about-content p + p { margin-top: 20px; }
.about-content a { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }
.contact-credits { margin-top: 48px; padding-bottom: 0; border-color: var(--dark-line); }
.contact-credits .about-content { color: var(--dark-soft); }
.contact-credits a { color: var(--blue-light); }
.contact-credits + footer { margin-top: 24px; }
#guide-decision { display: inline-flex; align-items: center; min-height: 44px; color: var(--blue-light); font-size: 14px; text-decoration: underline; text-underline-offset: 4px; }
#decision-states, #decision-roles, #decision-core, #decision-tokens { scroll-margin-top: 100px; }
.small-button { min-height: 44px; padding: 10px 18px; border-radius: 8px; background: var(--surface); color: var(--ink); font-size: 14px; font-weight: 600; white-space: nowrap; }
.small-button:hover { background: #e4e8ef; }
.frame-status { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 14px; padding: 24px; text-align: center; background: var(--dark-surface); }
.frame-status strong { font-size: 22px; }
.frame-status p { max-width: 48ch; color: var(--dark-soft); }
.shell-dialog { max-width: 460px; width: calc(100% - 48px); padding: 32px; border: 0; border-radius: 16px; background: var(--surface); color: var(--ink); box-shadow: 0 24px 80px #08090b40; }
.shell-dialog::backdrop { background: #08090b88; }
.shell-dialog h2 { font-size: 28px; line-height: 1.15; letter-spacing: -.025em; }
.shell-dialog p { color: var(--ink-soft); margin-block: 16px 24px; }
.dialog-buttons { display: flex; justify-content: flex-end; gap: 12px; flex-wrap: wrap; }
.dialog-buttons button { min-height: 44px; padding: 10px 16px; background: var(--bg); border-radius: 8px; color: var(--ink); font-weight: 550; }
.dialog-buttons button[value="reset"] { background: var(--blue); color: var(--surface); }
.demo.expanded { position: fixed; inset: 0; z-index: 150; max-width: none; padding: 0 24px; background: var(--dark); display: flex; flex-direction: column; }
.demo.expanded .frame-stage { flex: 1; min-height: 0; overflow: hidden; }
.demo.expanded .viewport { max-height: 100%; }
.demo.expanded .comparison-toolbar, .demo.expanded .frame-meta, .demo.expanded .demo-caption, .demo.expanded .guide { flex-shrink: 0; }
.demo.expanded .demo-caption { display: none; }
body.has-expanded { overflow: hidden; }
.noscript-note { padding-block: 24px; }
@media (max-width: 1150px) {
  .comparison-toolbar { flex-wrap: wrap; gap: 12px; }
  .demo-actions { margin-left: auto; }
  .role-control { gap: 6px; margin-right: 0; }
  .role-control > span { display: none; }
}
@media (max-width: 700px) {
  .theatre { padding: 8px 16px 0; }
  .desktop-notice { padding: 16px 8px; gap: 12px; }
  .desktop-notice .desktop-notice-action { display: block; }
  .comparison-toolbar { padding: 12px 8px; gap: 12px; }
  .segment { width: 100%; }
  .segment button { flex: 1; padding-inline: 10px; }
  .segment button > span { display: none; }
  .demo-actions { margin: 0; width: 100%; gap: 8px; display: grid; grid-template-columns: 1fr 1fr 44px 44px; }
  .role-control { margin-right: auto; }
  .role-control select { width: 100%; max-width: none; font-size: 13px; padding: 8px 32px 8px 10px; }
  .role-control { grid-column: 1 / 3; width: 100%; min-width: 0; }
  .demo-actions > #tour { grid-column: 3 / 5; grid-row: 1; }
  .demo-actions > #reset { grid-column: 3; grid-row: 2; }
  .demo-actions > #expand { grid-column: 4; grid-row: 2; }
  .quiet-button { font-size: 13px; padding-inline: 8px; }
  #tour .icon { display: none; }
  .frame-meta { gap: 8px; font-size: 12px; padding-inline: 8px; }
  #scale-label { display: none; }
  .mobile-hint { display: block; color: var(--dark-soft); font-size: 12px; line-height: 1.6; padding: 0 0 12px; }
  .demo-caption { align-items: flex-start; flex-direction: column; font-size: 13px; padding-block: 16px; gap: 8px; }
  .demo-caption > span:last-child { max-width: 65ch; text-align: left; }
  .demo.expanded { padding-inline: 12px; }
  .demo.expanded .demo-caption { display: none; }
}
@media (max-width: 360px) {
  .demo-actions > #tour { font-size: 12px; }
}

/* One operating group, inside the display. Keep native LMS headers untouched.
   The same DOM controls return to normal flow in expanded/tour mode. */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.frame-meta.sr-only { padding: 0; min-height: 0; border: 0; }
#demo-controls { scroll-margin-top: 16px; }
.comparison-toolbar { min-height: 60px; padding: 6px 8px; gap: 8px; }
.comparison-toolbar .segment { gap: 4px; padding: 2px; }
.comparison-toolbar .segment button { min-height: 44px; padding: 8px 10px; font-size: 13px; }
.comparison-toolbar .segment button > span, .comparison-toolbar .role-control > span { display: none; }
.comparison-toolbar .role-control { margin: 0; }
.comparison-toolbar .role-control select { font-size: 13px; }
.comparison-toolbar .demo-actions { gap: 4px; }
.comparison-toolbar .quiet-button { font-size: 13px; padding-inline: 8px; }
#fit { text-decoration: underline; text-underline-offset: 4px; }
@media (min-width: 701px) {
  .demo:not(.expanded) > .comparison-toolbar { position: absolute; z-index: 5; top: calc((100% - var(--demo-caption-height, 64px)) * .046); left: 9.0896%; width: 81.8775%; justify-content: center; flex-wrap: wrap; background: #17191f; border-bottom: 1px solid var(--dark-line); }
  .demo:not(.expanded) .demo-actions { margin-left: 0; }
}
@media (max-width: 700px) {
  .comparison-toolbar .demo-actions { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
  .comparison-toolbar .role-control { width: 100%; grid-column: 1 / 3; grid-row: 1; }
  .comparison-toolbar #tour { grid-column: 3 / 5; grid-row: 1; }
  .comparison-toolbar #fit { grid-column: 1 / 3; grid-row: 2; }
  .comparison-toolbar .icon-button { justify-self: end; }
  .demo:not(.expanded) .frame-stage { min-height: 0; }
}

/* Contextual tour: overlay inside the workspace, never above it in the page. */
.demo { position: relative; }
.demo.touring .frame-meta, .demo.touring .mobile-hint { display: none; }
.demo.touring .frame-stage { display: flex; align-items: center; justify-content: center; }
.demo.touring .viewport { width: 100%; }
.guide { position: absolute; z-index: 8; display: block; width: 320px; max-width: calc(100% - 24px); margin: 0; padding: 16px 20px; border-radius: 12px; background: #17191f; color: #fff; box-shadow: 0 12px 36px #0005; }
.guide-heading { display: flex; justify-content: space-between; align-items: center; margin-top: -8px; }
#guide-number { color: var(--dark-soft); font-size: 13px; }
.guide-copy strong { display: block; font-size: 18px; line-height: 1.3; }
.guide-copy p { color: var(--dark-soft); font-size: 14px; line-height: 1.5; margin-top: 10px; }
.guide-actions { display: flex; gap: 8px; align-items: center; margin-top: 14px; justify-content: space-between; }
.guide-actions button:disabled { cursor: default; }
.guide #guide-decision { font-size: 12px; min-height: 32px; margin-top: 4px; }
.tour-spotlight { position: absolute; z-index: 7; pointer-events: none; border: 2px solid #0759c7; outline: 2px solid white; border-radius: 6px; }
.demo.tour-docked .frame-stage { flex-direction: column; justify-content: flex-start; }
.demo.tour-docked .guide { position: relative; order: 2; width: 100%; max-width: none; margin-top: 12px; box-shadow: none; flex-shrink: 0; max-height: 48%; overflow: auto; }
.demo.tour-docked .viewport { flex-shrink: 0; }
.demo.touring .comparison-toolbar { min-height: 68px; }
@media (max-width: 700px) {
  .demo.touring .demo-actions > #reset, .demo.touring .demo-actions > #expand { grid-row: 1; }
  .demo.touring .demo-actions { display: flex; flex-wrap: wrap; }
  .demo.touring .role-control { width: auto; flex: 1; }
  .demo.touring #tour { flex: 1; }
  .demo.touring #reset { display: none; }
}