:root {
  color-scheme: light;
  --paper: #f7f5ee;
  --ink: #172d2b;
  --green: #235c4f;
  --green-dark: #183f35;
  --soft-green: #e9eee6;
  --line: #d1d8ce;
  --muted: #51655b;
  --amber: #e6a347;
  --amber-ink: #80541b;
  --amber-soft: #fff8e9;
  --serif: Georgia, 'Times New Roman', serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 108px; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
body:has(dialog[open]) { overflow: hidden; }
button, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
button { color: inherit; cursor: pointer; }
button:disabled { cursor: default; }
button, a, textarea { outline-offset: 5px; }
:focus-visible { outline: 2px solid var(--green); }
button { touch-action: manipulation; }
::selection { background: #d8e3d1; color: var(--ink); }
[hidden] { display: none !important; }
.container { width: min(1280px, calc(100% - 112px)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 100; top: -70px; left: 24px; background: var(--green); color: white; padding: 14px 20px; border-radius: 4px; }
.skip-link:focus { top: 14px; }
.site-header { position: sticky; z-index: 20; top: 0; background: rgba(247,245,238,.96); backdrop-filter: blur(16px); border-bottom: 1px solid var(--line); }
.header-inner { height: 89px; display: flex; justify-content: space-between; align-items: center; }
.wordmark { display: inline-flex; gap: 6px; align-items: center; font-size: 29px; letter-spacing: -1.35px; font-weight: 650; white-space: nowrap; }
.wordmark-ai { font-weight: 420; }
.brand-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--amber); align-self: start; margin-top: 8px; margin-left: 1px; }
.site-nav { display: flex; align-items: center; gap: 36px; font-size: 13px; font-weight: 450; }
.site-nav a { padding-block: 12px; }
.site-nav a:hover, .site-nav a[aria-current] { color: var(--green); }
.site-nav a[aria-current] { text-decoration: underline; text-decoration-color: #9bb2a1; text-underline-offset: 7px; }
.nav-contact { border-left: 1px solid var(--line); padding-left: 28px; }
.nav-contact span { margin-left: 13px; }
.menu-toggle { display: none; }
.hero { display: grid; grid-template-columns: 1.02fr 1fr; column-gap: 50px; padding-top: 83px; align-items: center; }
.eyebrow, .micro-label, .card-eyebrow, .section-index { font-size: 10px; letter-spacing: 1.65px; font-weight: 550; text-transform: uppercase; }
.eyebrow { display: flex; align-items: center; gap: 9px; margin: 0 0 26px; color: var(--green); line-height: 1.8; }
.tiny-dot { display: inline-block; width: 5px; height: 5px; background: var(--green); border-radius: 50%; flex: 0 0 auto; }
.positioning { margin: 0 0 18px; font-size: 14px; line-height: 1.7; color: var(--muted); }
h1, h2, h3, p { margin-top: 0; }
h1 { font-family: var(--serif); font-size: clamp(52px, 5.25vw, 78px); line-height: 1.035; letter-spacing: -3.1px; font-weight: 400; margin-bottom: 26px; }
h1 em, h2 em { font-weight: 400; color: var(--green); }
.hero-description { max-width: 485px; font-size: 15px; line-height: 1.85; color: var(--muted); margin-bottom: 28px; }
.hero-actions { display: flex; align-items: center; gap: 26px; flex-wrap: wrap; }
.button { min-height: 48px; border-radius: 5px; border: 1px solid transparent; padding: 14px 19px; display: inline-flex; justify-content: center; align-items: center; gap: 24px; font-size: 12px; font-weight: 500; line-height: 1.4; transition: background .18s, transform .18s; }
.button-primary { background: var(--green); color: white; }
.button-primary:hover { background: var(--green-dark); }
.button span:last-child { font-size: 16px; font-weight: 400; }
.text-link { display: inline-flex; gap: 14px; align-items: center; font-size: 12px; padding-block: 12px; }
.text-link:hover { color: var(--green); }
.hero-note { font-size: 10px; line-height: 1.75; color: var(--muted); margin-top: 23px; margin-bottom: 0; }
.hero-figure { width: 100%; margin: 0; padding: 24px 18px 20px; background: var(--soft-green); border: 1px solid #dbe2d6; border-radius: 12px; transform: translateY(6px); }
.figure-topline { display: flex; gap: 10px; justify-content: space-between; align-items: center; padding-inline: 8px; }
.micro-label { color: var(--green); font-size: 9px; letter-spacing: 1.4px; line-height: 1.65; }
.concept-tag { border: 1px solid #b5c7b7; border-radius: 30px; font-size: 9px; padding: 5px 8px; color: var(--muted); white-space: nowrap; }
.hero-figure figcaption { color: var(--muted); font-size: 9px; line-height: 1.6; display: flex; align-items: center; gap: 8px; padding-inline: 8px; }
.hero-principles { grid-column: 1 / -1; display: flex; gap: 0; margin-top: 64px; padding: 24px 0 28px; border-bottom: 1px solid var(--line); }
.hero-principles span { font-size: 10px; color: var(--muted); padding-right: 26px; margin-right: 26px; border-right: 1px solid var(--line); }
.hero-principles span:last-child { border: 0; }
.section { padding-block: 100px; }
.section-index { display: flex; align-items: center; gap: 18px; color: var(--green); margin-bottom: 35px; }
.section-index > span { color: #788a79; font-size: 10px; font-variant-numeric: tabular-nums; }
h2 { font-family: var(--serif); font-size: clamp(36px, 3.4vw, 52px); line-height: 1.12; letter-spacing: -1.7px; font-weight: 400; margin-bottom: 26px; }
.section-lead { font-size: 18px; line-height: 1.75; margin-bottom: 20px; }
.body-copy { font-size: 14px; line-height: 1.9; color: var(--muted); max-width: 560px; margin-bottom: 18px; }
.why-grid { display: grid; grid-template-columns: 1fr .94fr; gap: 100px; align-items: start; }
.why-grid > div { max-width: 530px; }
.focus-breadcrumb { display: flex; flex-wrap: wrap; gap: 12px; color: var(--muted); font-size: 10px; margin-top: 25px; }
.focus-breadcrumb strong { font-weight: 500; color: var(--green); }
.observation-card { margin-top: 3px; background: #fffefa; border: 1px solid var(--line); padding: 32px 32px 24px; border-radius: 9px; }
.card-eyebrow { display: flex; gap: 8px; align-items: center; color: var(--green); font-size: 9px; letter-spacing: 1.3px; }
.observation-card h3 { font-family: var(--serif); font-size: 27px; line-height: 1.28; font-weight: 400; letter-spacing: -.4px; margin-top: 22px; margin-bottom: 14px; }
.scenario-input { font-size: 12px; line-height: 1.8; color: var(--muted); margin-bottom: 20px; }
.observation-list { margin: 0; }
.observation-list > div { border-top: 1px solid var(--line); padding-block: 17px; }
.observation-list dt { font-size: 10px; font-weight: 600; display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.observation-list dd { margin: 0 0 0 15px; color: var(--muted); font-size: 12px; line-height: 1.7; }
.status-symbol { width: 7px; height: 7px; display: inline-block; flex-shrink: 0; }
.status-solid { border-radius: 50%; background: var(--green); }
.status-open { border: 1px solid var(--amber-ink); border-radius: 50%; }
.status-arrow { height: auto; width: auto; margin-left: -1px; font-size: 12px; color: var(--green); }
.observation-list .limit-row dt, .observation-list .limit-row dd { color: var(--amber-ink); }
.illustration-note { border-top: 1px solid var(--line); padding-top: 16px; margin-bottom: 0; color: var(--muted); font-size: 9px; line-height: 1.65; }
.section-principles { padding-top: 76px; border-top: 1px solid var(--line); }
.principles-intro { display: grid; grid-template-columns: 1.15fr .85fr; gap: 80px; margin-bottom: 42px; }
.principles-intro .body-copy { padding-top: 63px; max-width: 420px; }
.principle-row { display: grid; grid-template-columns: 34px 1fr 1.4fr 1.1fr; gap: 22px; align-items: center; border-top: 1px solid var(--line); padding: 31px 0; min-height: 151px; }
.principle-row:last-child { border-bottom: 1px solid var(--line); }
.principle-number { align-self: start; padding-top: 6px; color: #6e826f; font-size: 10px; font-variant-numeric: tabular-nums; }
.principle-row h3 { font-size: 17px; font-weight: 500; line-height: 1.5; letter-spacing: -.3px; margin: 0; }
.principle-row > p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.85; max-width: 355px; }
.principle-art { margin-left: auto; max-width: 235px; width: 100%; font-size: 9px; color: var(--green); padding-left: 16px; }
.principle-art small { display: block; width: 100%; color: var(--muted); font-size: 9px; margin-top: 13px; }
.trace-art { display: flex; flex-wrap: wrap; align-items: center; }
.trace-art > span { padding: 6px 7px; border: 1px solid #b6c8b4; border-radius: 4px; white-space: nowrap; }
.trace-art .art-open { border-style: dashed; border-color: var(--amber-ink); color: var(--amber-ink); }
.trace-art i { height: 1px; flex: 1; min-width: 8px; background: #91a78c; }
.review-art .mini-caption { font-size: 8px; letter-spacing: 1px; }
.review-art > div { display: flex; align-items: center; gap: 9px; margin-top: 11px; }
.review-dot { width: 7px; height: 7px; border: 1px solid var(--green); border-radius: 50%; }
.method-art > span { display: inline-block; border-bottom: 1px solid #b1c2ae; padding-block: 5px; margin-right: 10px; font-size: 9px; }
.validation-art > span { display: block; font-size: 10px; border-left: 2px solid #8aa080; padding: 5px 10px; }
.validation-art .validation-pending { color: var(--amber-ink); border-left: 2px dashed #b08240; margin-top: 9px; }
.section-investigation { background: #e9eee5; border-block: 1px solid #dbe1d5; padding-bottom: 90px; }
.investigation-intro { display: grid; grid-template-columns: 1.35fr .65fr; gap: 70px; align-items: end; margin-bottom: 36px; }
.investigation-intro h2 { margin-bottom: 0; }
.investigation-intro .body-copy { font-size: 13px; margin-bottom: 2px; }
.concept-shell { border: 1px solid #bccab8; border-radius: 10px; background: #fbfbf5; overflow: hidden; }
.concept-topline { display: flex; align-items: center; justify-content: space-between; gap: 15px; padding: 19px 26px; border-bottom: 1px solid #dbe1d5; }
.concept-record { font-size: 9px; color: var(--muted); }
.concept-question { padding: 22px 26px 24px; }
.concept-question p { font-family: var(--serif); font-size: 23px; line-height: 1.4; margin: 7px 0 0; letter-spacing: -.3px; }
.step-nav { display: grid; grid-template-columns: repeat(6, 1fr); padding-inline: 26px; border-bottom: 1px solid #dbe1d5; gap: 14px; }
.step-nav button { display: flex; gap: 9px; align-items: center; border: 0; border-bottom: 2px solid transparent; padding: 15px 1px; background: none; color: var(--muted); font-size: 12px; text-align: left; }
.step-nav button > span { font-size: 8px; font-variant-numeric: tabular-nums; opacity: .7; }
.step-nav button:hover { color: var(--green); }
.step-nav button[aria-pressed="true"] { color: var(--green); border-color: var(--green); font-weight: 600; }
.concept-content { display: grid; grid-template-columns: 1.68fr 1fr; }
.concept-scene { padding: 25px 26px 20px; background: #f0f3eb; }
.scene-caption { display: flex; justify-content: space-between; gap: 10px; align-items: center; }
.scene-state { font-size: 8px; color: var(--amber-ink); background: #f6eedb; border: 1px solid #d6c4a0; border-radius: 30px; padding: 5px 8px; }
.desktop-concept { margin-block: 14px; min-height: 294px; display: flex; align-items: center; }
.desktop-concept svg { width: 100%; height: auto; overflow: visible; }
.diagram-kicker { font: 9px var(--sans); letter-spacing: 1px; fill: #52705c; }
.diagram-label { font: 12px var(--sans); fill: #172d2b; }
.diagram-small { font: 10px var(--sans); fill: #52665c; }
.diagram-muted { opacity: .42; }
.diagram-highlight { stroke: #235c4f; stroke-width: 2; }
.concept-connector { fill: none; stroke: #8da78f; stroke-width: 1.5; }
.concept-connector--gap { stroke: #9b6c25; stroke-dasharray: 5 5; }
.concept-shell.is-playing .active-connector { stroke-dasharray: 6 4; animation: flow-path 1.8s linear infinite; }
@keyframes flow-path { to { stroke-dashoffset: -20; } }
.scene-key { display: flex; gap: 21px; flex-wrap: wrap; font-size: 8px; color: var(--muted); }
.scene-key span { display: flex; align-items: center; gap: 7px; }
.scene-key i { display: inline-block; width: 18px; height: 1px; background: #6c8b71; }
.scene-key .key-dashed { height: 0; border-top: 1px dashed var(--amber-ink); background: none; }
.concept-explanation { padding: 27px 27px 20px; border-left: 1px solid #dbe1d5; display: flex; flex-direction: column; }
.step-detail { border-left: 2px solid #b6c6ad; padding: 4px 0 4px 13px; color: var(--muted); font-size: 10px; line-height: 1.8; }
.step-detail-gap { border-left: 2px dashed #b08240; color: var(--amber-ink); }
.basis-button { background: none; border: 0; border-top: 1px solid #dbe1d5; text-align: left; padding: 14px 0 0; margin-top: 22px; font-size: 10px; color: var(--green); display: flex; justify-content: space-between; gap: 12px; width: 100%; }
.concept-controls { border-top: 1px solid #dbe1d5; padding: 18px 26px; display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.playback-controls { display: flex; align-items: center; gap: 9px; }
.concept-play { padding: 10px 14px; min-height: 42px; min-width: 142px; gap: 12px; font-size: 11px; }
.button .play-icon { font-size: 17px; }
.button [data-play-label] { font-size: 11px; }
.step-control { width: 42px; height: 42px; border: 1px solid #becbb7; border-radius: 5px; background: transparent; font-size: 17px; }
.step-control:hover { background: #e5ebdf; }
.step-control:disabled { opacity: .35; }
.replay-button { padding: 12px; background: none; border: 0; font-size: 10px; color: var(--muted); }
.playback-state { font-size: 9px; color: var(--muted); margin: 0; text-align: right; }
.concept-footnote { font-size: 9px; line-height: 1.75; margin: 0; padding: 0 26px 18px; color: var(--muted); }
.mobile-concept { display: none; }
.collaboration-copy { max-width: 770px; }
.collaboration-copy .body-copy { max-width: 575px; }
.collaboration-copy .section-lead { max-width: 640px; }
.collaboration-bottom { display: flex; align-items: center; justify-content: space-between; gap: 50px; margin-top: 34px; padding-top: 26px; border-top: 1px solid var(--line); }
.discussion-topics { list-style: none; margin: 0; padding: 0; color: var(--muted); font-size: 12px; line-height: 2.4; }
.discussion-topics li::before { content: '↗'; margin-right: 13px; color: var(--green); }
.contact-action { min-width: 235px; text-align: right; }
.contact-note { color: var(--muted); font-size: 9px; line-height: 1.75; margin: 13px 0 0; }
.collaboration-note { font-size: 10px; color: var(--muted); margin: 29px 0 0; line-height: 1.8; }
.site-footer { border-top: 1px solid var(--line); }
.footer-inner { min-height: 100px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.site-footer .wordmark { font-size: 23px; }
.site-footer .brand-dot { margin-top: 6px; width: 5px; height: 5px; }
.site-footer p { margin: 0; font-size: 10px; color: var(--muted); }
.footer-domain, .back-top { font-size: 10px; color: var(--muted); }
.footer-domain span { color: var(--green); margin-left: 7px; }
.site-dialog { width: min(620px, calc(100% - 40px)); max-height: min(86vh, 850px); margin: auto; border: 1px solid #b6c6ad; border-radius: 12px; background: var(--paper); padding: 28px 32px 32px; color: var(--ink); overflow-y: auto; }
.site-dialog::backdrop { background: rgba(13,31,26,.45); backdrop-filter: blur(5px); }
.dialog-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.dialog-close { border: 1px solid var(--line); background: transparent; font-size: 23px; font-weight: 300; border-radius: 50%; width: 34px; height: 34px; }
.site-dialog h2 { font-size: 35px; margin-bottom: 17px; }
.dialog-lead { font-size: 12px; line-height: 1.85; color: var(--muted); }
.basis-records { margin: 24px 0 0; }
.basis-records > div { border-top: 1px solid var(--line); padding: 15px 0; }
.basis-records dt { font-size: 11px; font-weight: 600; margin-bottom: 7px; }
.basis-records dd { margin: 0; font-size: 12px; line-height: 1.8; color: var(--muted); }
@media (min-width: 1480px) { .hero { padding-top: 100px; } }
@media (max-width: 1150px) {
  .container { width: calc(100% - 72px); }
  .hero { gap: 30px; padding-top: 65px; }
  h1 { font-size: 61px; letter-spacing: -2.6px; }
  .hero-description { font-size: 14px; }
  .hero-actions { gap: 14px; }
  .hero-figure { padding-inline: 12px; }
  .figure-topline { flex-wrap: wrap; }
  .why-grid { gap: 55px; }
  .observation-card { padding: 26px; }
  .principle-row { grid-template-columns: 25px 1fr 1.45fr .95fr; gap: 16px; }
  .principle-art { padding-left: 0; }
  .investigation-intro { gap: 45px; }
  .concept-content { grid-template-columns: 1.4fr 1fr; }
  .desktop-concept { min-height: 284px; }
  .step-nav { gap: 8px; }
  .step-nav button { font-size: 11px; gap: 6px; }
}
@media (max-width: 850px) {
  .site-nav { gap: 22px; font-size: 12px; }
  .nav-contact { padding-left: 20px; }
  .hero { grid-template-columns: 1fr; padding-top: 54px; gap: 39px; }
  h1 { font-size: clamp(53px, 8vw, 75px); }
  .hero-description { max-width: 570px; }
  .hero-figure { max-width: 640px; margin-inline: auto; padding: 23px; }
  .figure-topline { flex-wrap: nowrap; }
  .hero-principles { margin-top: 0; }
  .section { padding-block: 73px; }
  .why-grid { gap: 35px; }
  h2 { font-size: 38px; }
  .observation-card { padding: 24px; }
  .observation-card h3 { font-size: 24px; }
  .principles-intro { gap: 35px; grid-template-columns: 1.1fr 1fr; }
  .principles-intro .body-copy { padding-top: 51px; }
  .principle-row { grid-template-columns: 24px .95fr 1.5fr; }
  .principle-art { display: none; }
  .investigation-intro { grid-template-columns: 1fr; gap: 20px; }
  .investigation-intro .body-copy { max-width: 580px; }
  .concept-content { grid-template-columns: 1fr; }
  .concept-explanation { border-left: 0; border-top: 1px solid #dbe1d5; padding: 24px; }
  .desktop-concept { min-height: 0; }
  .concept-scene { padding: 24px; }
  .basis-button { max-width: 350px; }
  .playback-state { max-width: 210px; }
}
@media (max-width: 600px) {
  html { scroll-padding-top: 85px; }
  .container { width: calc(100% - 40px); }
  .header-inner { height: 73px; }
  .wordmark { font-size: 25px; }
  .brand-dot { margin-top: 6px; }
  .js .menu-toggle { display: flex; background: transparent; border: 0; padding: 10px 0 10px 14px; align-items: center; gap: 12px; font-size: 12px; }
  .menu-lines { position: relative; width: 18px; height: 10px; border-block: 1px solid var(--ink); }
  .js .site-nav { position: absolute; left: 0; right: 0; top: 73px; padding: 22px 20px; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 16px 20px #172d2b08; display: none; flex-direction: column; align-items: stretch; gap: 6px; }
  .js .site-nav.is-open { display: flex; }
  .site-nav a { padding: 13px 0; }
  .site-nav .nav-contact { border-left: 0; border-top: 1px solid var(--line); margin-top: 8px; padding-top: 18px; }
  body:not(.js) .site-nav { display: flex; flex-wrap: wrap; gap: 10px; font-size: 10px; }
  .hero { padding-top: 38px; gap: 34px; }
  .eyebrow { font-size: 8px; letter-spacing: 1px; margin-bottom: 22px; }
  .positioning { font-size: 11px; margin-bottom: 15px; }
  h1 { font-size: clamp(43px, 10.5vw, 61px); letter-spacing: -1.9px; margin-bottom: 23px; line-height: 1.08; }
  .hero-description { font-size: 13px; line-height: 1.8; }
  .hero-actions { gap: 16px; }
  .hero-actions .button { padding: 13px 16px; gap: 16px; font-size: 11px; }
  .hero-actions .text-link { font-size: 11px; }
  .hero-note { font-size: 9px; }
  .hero-figure { padding: 18px 9px 15px; border-radius: 8px; }
  .figure-topline { flex-wrap: wrap; gap: 8px; padding-inline: 10px; }
  .figure-topline .micro-label { font-size: 8px; }
  .concept-tag { font-size: 8px; }
  .hero-figure figcaption { font-size: 8px; }
  .hero-principles { padding-top: 7px; padding-bottom: 26px; flex-wrap: wrap; row-gap: 10px; }
  .hero-principles span { padding-right: 13px; margin-right: 13px; font-size: 8px; }
  .hero-principles span:last-child { padding-right: 0; margin-right: 0; }
  .section { padding-block: 60px; }
  .section-index { font-size: 8px; letter-spacing: 1.35px; margin-bottom: 26px; gap: 13px; }
  .section-index > span { font-size: 8px; }
  h2 { font-size: 37px; letter-spacing: -1.2px; line-height: 1.15; margin-bottom: 21px; }
  .section-lead { font-size: 16px; line-height: 1.8; }
  .body-copy { font-size: 13px; line-height: 1.85; }
  .why-grid { grid-template-columns: 1fr; gap: 29px; }
  .observation-card { padding: 24px; }
  .observation-card h3 { font-size: 27px; }
  .scenario-input { font-size: 12px; }
  .observation-list dt { font-size: 11px; }
  .observation-list dd { font-size: 12px; }
  .principles-intro { grid-template-columns: 1fr; gap: 0; margin-bottom: 29px; }
  .principles-intro .body-copy { padding-top: 0; }
  .principle-row { grid-template-columns: 24px 1fr; gap: 10px 14px; align-items: start; padding: 25px 0; }
  .principle-row h3 { font-size: 18px; }
  .principle-row h3 br { display: none; }
  .principle-row > p { grid-column: 2; max-width: 100%; font-size: 12px; }
  .principle-number { padding-top: 7px; }
  .investigation-intro { gap: 18px; }
  .investigation-intro h2 br { display: none; }
  .concept-topline { padding: 16px 18px; flex-direction: column; align-items: start; gap: 9px; }
  .concept-record { font-size: 8px; }
  .concept-question { padding: 20px 18px; }
  .concept-question p { font-size: 22px; line-height: 1.4; }
  .step-nav { padding-inline: 16px; gap: 0; }
  .step-nav button { flex-direction: column; gap: 7px; align-items: start; padding: 13px 0 12px; font-size: 9px; }
  .step-nav button > span { font-size: 7px; }
  .concept-scene { padding: 20px 18px; }
  .scene-caption { align-items: start; }
  .scene-caption .micro-label { font-size: 8px; }
  .scene-state { max-width: 135px; text-align: center; font-size: 8px; }
  .desktop-concept { display: none; }
  .mobile-concept { display: block; margin-block: 25px; }
  .mobile-concept > div { padding: 14px 16px; border: 1px solid #c4d1bd; border-radius: 7px; background: #fffefa; }
  .mobile-concept strong { display: block; font-size: 12px; line-height: 1.7; font-weight: 450; margin-top: 4px; }
  .mobile-concept .mobile-gap { border: 1px dashed #9b6c25; background: var(--amber-soft); }
  .mobile-gap .micro-label { color: var(--amber-ink); }
  .mobile-connector { display: block; text-align: center; color: #74906e; font-size: 18px; line-height: 1.8; }
  .scene-key { font-size: 7px; gap: 12px; }
  .concept-explanation { padding: 23px 18px; }
  .step-detail { font-size: 11px; }
  .concept-controls { padding: 16px 18px; flex-wrap: wrap; gap: 14px; }
  .playback-controls { gap: 7px; }
  .concept-play { min-width: 127px; padding-inline: 12px; }
  .step-control { width: 36px; }
  .replay-button { padding-inline: 7px; }
  .playback-state { max-width: none; text-align: left; font-size: 9px; }
  .concept-footnote { padding-inline: 18px; font-size: 8px; }
  .collaboration-copy h2 br { display: none; }
  .collaboration-bottom { flex-direction: column; align-items: start; gap: 23px; margin-top: 26px; }
  .discussion-topics { font-size: 11px; line-height: 2; }
  .discussion-topics li { margin-bottom: 10px; }
  .contact-action { text-align: left; min-width: 0; }
  .contact-note { font-size: 9px; }
  .collaboration-note { font-size: 9px; }
  .footer-inner { padding-block: 25px; min-height: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
  .footer-inner .wordmark { font-size: 23px; }
  .footer-inner p { grid-row: 2; grid-column: 1 / -1; font-size: 9px; }
  .footer-domain { text-align: right; font-size: 9px; }
  .back-top { grid-row: 3; grid-column: 1 / -1; font-size: 9px; }
  .site-dialog { padding: 23px; width: calc(100% - 28px); }
  .site-dialog h2 { font-size: 30px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}