.section { padding: 76px max(40px, calc(50% - 720px)); }
    .kicker { margin: 0; color: var(--terra); font-family: var(--mono); font-size: 11px; font-weight: 780; letter-spacing: .13em; text-transform: uppercase; }
    .kicker.line { display: flex; align-items: center; gap: 14px; }
    .kicker.line::before { content: ""; width: 26px; height: 1px; background: currentColor; }
    .section-head { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(310px, .58fr); align-items: end; gap: 80px; }
    .section-head h2 { max-width: 940px; margin: 25px 0 0; font-size: clamp(43px, 4.6vw, 70px); font-weight: 480; letter-spacing: -.057em; line-height: 1.04; }
    .section-head > p { margin: 0; color: var(--muted); font-size: 17px; line-height: 1.62; }

    .hero { width: var(--wrap); min-height: 700px; margin: 0 auto; padding: 66px 0 48px; display: grid; grid-template-columns: .93fr 1.07fr; align-items: center; gap: 68px; }
    .hero-copy { max-width: 700px; }
    .hero h1 { margin: 34px 0 28px; font-size: clamp(55px, 5.45vw, 84px); font-weight: 480; letter-spacing: -.064em; line-height: 1.01; }
    .hero h1 em { color: var(--terra); font-style: normal; }
    .hero-lede { max-width: 650px; margin: 0; color: var(--muted); font-size: 18px; line-height: 1.6; }
    .hero-context { max-width: 650px; margin: 21px 0 0; padding-left: 18px; border-left: 3px solid var(--terra); color: var(--muted); font-size: 13px; line-height: 1.58; }
    .hero-context strong { color: var(--ink); }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
    .hero-proof { display: flex; flex-wrap: wrap; gap: 23px; margin-top: 28px; color: var(--muted); font-family: var(--mono); font-size: 9px; letter-spacing: .04em; text-transform: uppercase; }
    .hero-proof span::before { content: "✓"; margin-right: 8px; color: var(--terra); }

    .artwork { margin: 0; border: 1px solid var(--line); background: var(--white); }
    .artwork-label { min-height: 62px; padding: 0 20px; border-bottom: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; color: var(--muted); font-family: var(--mono); font-size: 10px; }
    .artwork-label strong { display: inline-flex; align-items: center; gap: 10px; color: var(--green); }
    .artwork-label strong::before { content: ""; width: 7px; height: 7px; background: var(--green); border-radius: 50%; }
    .artwork img { width: 100%; max-height: 330px; aspect-ratio: 1.9 / 1; object-fit: cover; object-position: center; filter: saturate(.82) contrast(.96); }
    .artwork figcaption { display: grid; grid-template-columns: 175px 1fr; gap: 25px; padding: 20px; border-top: 1px solid var(--line); }
    .artwork figcaption span { color: var(--terra); font-family: var(--mono); font-size: 9px; font-weight: 780; letter-spacing: .07em; line-height: 1.45; text-transform: uppercase; }
    .artwork figcaption p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.55; }
    .artwork figcaption a { color: var(--terra); font-weight: 750; }

    .instrument-facts { display: grid; grid-template-columns: repeat(4, 1fr); width: var(--wrap); margin: 0 auto; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .instrument-facts article { min-height: 138px; padding: 24px 27px; border-right: 1px solid var(--line); }
    .instrument-facts article:first-child { padding-left: 0; }
    .instrument-facts article:last-child { border-right: 0; }
    .instrument-facts b { color: var(--terra); font-size: 27px; font-weight: 520; letter-spacing: -.04em; }
    .instrument-facts strong, .instrument-facts small { display: block; }
    .instrument-facts strong { margin-top: 18px; font-size: 13px; }
    .instrument-facts small { margin-top: 7px; color: var(--muted); font-size: 10px; line-height: 1.45; }

    .architecture { background: var(--cream); }
    .architecture-shell { display: grid; grid-template-columns: 1.1fr .9fr; margin-top: 52px; border: 1px solid var(--line); }
    .family-panel { padding: 32px; }
    .family-panel + .family-panel { border-left: 1px solid var(--line); background: var(--paper); }
    .family-panel > span { color: var(--terra); font-family: var(--mono); font-size: 9px; font-weight: 800; letter-spacing: .09em; text-transform: uppercase; }
    .family-panel h3 { margin: 31px 0 14px; font-size: 28px; letter-spacing: -.04em; }
    .family-panel > p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.55; }
    .factor-list { display: grid; grid-template-columns: 1fr 1fr; margin-top: 28px; border-top: 1px solid var(--line); }
    .factor-list div { min-height: 94px; padding: 17px 13px 13px 0; border-bottom: 1px solid var(--line); }
    .factor-list div:nth-child(even) { padding-left: 14px; border-left: 1px solid var(--line); }
    .factor-list span, .factor-list strong { display: block; }
    .factor-list span { color: var(--terra); font-family: var(--mono); font-size: 8px; }
    .factor-list strong { margin-top: 14px; font-size: 12px; line-height: 1.4; }
    .ai-factor-list { margin-top: 28px; border-top: 1px solid var(--line); }
    .ai-factor-list div { min-height: 94px; padding: 17px 0; border-bottom: 1px solid var(--line); }
    .ai-factor-list span, .ai-factor-list strong, .ai-factor-list small { display: block; }
    .ai-factor-list span { color: var(--terra); font-family: var(--mono); font-size: 8px; }
    .ai-factor-list strong { margin-top: 10px; font-size: 14px; }
    .ai-factor-list small { margin-top: 5px; color: var(--muted); font-size: 10px; line-height: 1.4; }
    .architecture-note { display: grid; grid-template-columns: .55fr 1.45fr; gap: 40px; align-items: center; padding: 24px 28px; border: 1px solid var(--line); border-top: 0; color: var(--paper); background: var(--green-dark); }
    .architecture-note span { color: var(--lavender); font-family: var(--mono); font-size: 9px; font-weight: 800; letter-spacing: .09em; text-transform: uppercase; }
    .architecture-note p { margin: 0; font-size: 16px; font-weight: 620; line-height: 1.5; }

    .dimensions { background: var(--white); }
    .dimension-table { margin-top: 52px; border: 1px solid var(--line); overflow-x: auto; }
    .dimension-table table { width: 100%; min-width: 930px; border-collapse: collapse; }
    .dimension-table th { padding: 15px 22px; color: var(--muted); background: var(--cream); font-family: var(--mono); font-size: 9px; font-weight: 800; letter-spacing: .08em; text-align: left; text-transform: uppercase; }
    .dimension-table th:first-child { width: 26%; }
    .dimension-table th:nth-child(2) { width: 35%; }
    .dimension-table td { padding: 20px 22px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; line-height: 1.5; vertical-align: top; }
    .dimension-table tbody tr:first-child td { border-top: 0; }
    .dimension-table td:first-child { color: var(--ink); font-weight: 720; }
    .dimension-table tr.ai-row td:first-child { color: var(--terra); }
    .table-index { display: inline-block; min-width: 35px; color: var(--terra); font-family: var(--mono); font-size: 9px; }
    .origin-tag { display: inline-block; margin-top: 8px; padding: 4px 7px; border: 1px solid var(--line); color: var(--muted); font-family: var(--mono); font-size: 7px; font-weight: 800; text-transform: uppercase; }

    .parallel { background: var(--paper); }
    .parallel-grid { display: grid; grid-template-columns: 1fr 90px 1fr; margin-top: 52px; align-items: stretch; }
    .time-card { padding: 31px; border: 1px solid var(--line); background: var(--cream); }
    .time-card.post { background: var(--white); }
    .time-card > span { color: var(--terra); font-family: var(--mono); font-size: 10px; font-weight: 800; text-transform: uppercase; }
    .time-card h3 { margin: 38px 0 15px; font-size: 28px; letter-spacing: -.04em; }
    .time-card > p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.58; }
    .time-list { margin: 28px 0 0; padding: 0; list-style: none; }
    .time-list li { position: relative; padding: 13px 0 13px 23px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; line-height: 1.45; }
    .time-list li::before { position: absolute; left: 0; color: var(--terra); content: "→"; }
    .parallel-arrow { display: grid; place-items: center; color: var(--terra); font-family: var(--mono); font-size: 23px; }
    .comparison-warning { display: grid; grid-template-columns: .58fr 1.42fr; gap: 42px; align-items: center; margin-top: 30px; padding: 27px 30px; color: var(--paper); background: var(--green-dark); }
    .comparison-warning span { color: var(--lavender); font-family: var(--mono); font-size: 9px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
    .comparison-warning p { margin: 0; color: var(--cream); font-size: 17px; font-weight: 620; line-height: 1.5; }
    .context-fields { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 30px; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
    .context-fields article { min-height: 142px; padding: 21px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .context-fields span { color: var(--terra); font-family: var(--mono); font-size: 8px; }
    .context-fields strong { display: block; margin-top: 25px; font-size: 12px; line-height: 1.42; }

    .scoring { color: var(--paper); background: var(--green-dark); }
    .scoring .kicker { color: var(--lavender); }
    .scoring .section-head > p { color: rgba(244, 235, 218, .7); }
    .scale { display: grid; grid-template-columns: repeat(7, 1fr); margin-top: 52px; border: 1px solid var(--line-light); }
    .scale-step { min-height: 130px; padding: 19px; border-right: 1px solid var(--line-light); }
    .scale-step:last-child { border-right: 0; }
    .scale-step b { color: var(--lavender); font-family: var(--mono); font-size: 22px; font-weight: 560; }
    .scale-step strong, .scale-step small { display: block; }
    .scale-step strong { margin-top: 24px; color: var(--cream); font-size: 11px; }
    .scale-step small { margin-top: 6px; color: rgba(244, 235, 218, .5); font-size: 9px; line-height: 1.4; }
    .scoring-rules { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 30px; border-top: 1px solid var(--line-light); }
    .scoring-rule { min-height: 175px; padding: 24px 23px 20px 0; border-right: 1px solid var(--line-light); }
    .scoring-rule + .scoring-rule { padding-left: 23px; }
    .scoring-rule:last-child { border-right: 0; }
    .scoring-rule span { color: var(--lavender); font-family: var(--mono); font-size: 9px; }
    .scoring-rule strong { display: block; margin-top: 31px; color: var(--cream); font-size: 14px; line-height: 1.42; }
    .no-score { display: grid; grid-template-columns: .55fr 1.45fr; gap: 42px; align-items: center; margin-top: 6px; padding: 27px 30px; border-left: 4px solid var(--terra); background: rgba(244, 235, 218, .07); }
    .no-score span { color: var(--lavender); font-family: var(--mono); font-size: 9px; font-weight: 800; text-transform: uppercase; }
    .no-score p { margin: 0; color: var(--cream); font-size: 18px; font-weight: 650; line-height: 1.48; }

    .versions { background: var(--cream); }
    .version-grid { display: grid; grid-template-columns: 1fr 1fr; margin-top: 52px; border: 1px solid var(--line); }
    .hub-choices { padding-top: 62px; background: var(--cream); }
    .hub-grid { grid-template-columns: repeat(3, 1fr); }
    .hub-grid .version-card { min-height: 470px; }
    .version-card { min-height: 405px; padding: 32px; display: flex; flex-direction: column; background: rgba(255, 249, 242, .45); }
    .version-card + .version-card { border-left: 1px solid var(--line); background: var(--paper); }
    .version-top { display: flex; justify-content: space-between; gap: 20px; color: var(--terra); font-family: var(--mono); font-size: 9px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
    .version-card h3 { margin: 47px 0 16px; font-size: 30px; letter-spacing: -.045em; }
    .version-card > p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.58; }
    .version-list { margin: 27px 0; padding: 0; list-style: none; }
    .version-list li { position: relative; padding: 12px 0 12px 22px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; line-height: 1.42; }
    .version-list li::before { position: absolute; left: 0; color: var(--terra); content: "→"; }
    .version-card .button { align-self: flex-start; margin-top: auto; }
    .version-note { padding: 22px 26px; border: 1px solid var(--line); border-top: 0; color: var(--muted); font-size: 12px; line-height: 1.52; }
    .version-note strong { color: var(--ink); }

    .validation { background: var(--white); }
    .validation-track { display: grid; grid-template-columns: repeat(5, 1fr); margin-top: 52px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .validation-step { min-height: 260px; padding: 27px; border-right: 1px solid var(--line); }
    .validation-step:last-child { border-right: 0; }
    .validation-step span { color: var(--terra); font-family: var(--mono); font-size: 9px; }
    .validation-step h3 { margin: 52px 0 13px; font-size: 18px; letter-spacing: -.025em; line-height: 1.2; }
    .validation-step p { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.5; }
    .participate { display: grid; grid-template-columns: 1.02fr .98fr; margin-top: 30px; border-left: 4px solid var(--terra); color: var(--paper); background: var(--green-dark); }
    .participate-copy { padding: 35px 36px; }
    .participate-copy span { color: var(--lavender); font-family: var(--mono); font-size: 9px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
    .participate-copy h3 { max-width: 650px; margin: 24px 0 16px; font-size: 31px; letter-spacing: -.045em; line-height: 1.14; }
    .participate-copy p { margin: 0; color: rgba(244, 235, 218, .72); font-size: 14px; line-height: 1.58; }
    .participate-copy .button { margin-top: 27px; }
    .participate-who { padding: 35px; border-left: 1px solid var(--line-light); display: grid; align-content: center; }
    .participate-who strong { margin-bottom: 15px; color: var(--lavender); font-family: var(--mono); font-size: 9px; text-transform: uppercase; }
    .participate-who ul { margin: 0; padding: 0; list-style: none; }
    .participate-who li { padding: 13px 0 13px 23px; border-top: 1px solid var(--line-light); color: var(--cream); font-size: 12px; line-height: 1.45; position: relative; }
    .participate-who li::before { position: absolute; left: 0; color: var(--lavender); content: "→"; }
    .references { display: flex; flex-wrap: wrap; gap: 11px; margin-top: 28px; }
    .references a, .references span { padding: 12px 14px; border: 1px solid var(--line); color: var(--terra); font-family: var(--mono); font-size: 9px; font-weight: 750; }
    .references a:hover { background: var(--cream); }

    .newsletter { display: grid; grid-template-columns: 1.15fr .85fr; gap: 90px; align-items: center; background: var(--lavender); }
    .newsletter .kicker { color: var(--lavender-dark); }
    .newsletter h2 { max-width: 850px; margin: 25px 0 0; font-size: clamp(43px, 4.6vw, 70px); font-weight: 480; letter-spacing: -.057em; line-height: 1.04; }
    .newsletter-copy p { margin: 0; color: #423b65; font-size: 17px; line-height: 1.62; }
    .newsletter-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
    .newsletter .secondary { border-color: rgba(74, 64, 144, .35); }
    .newsletter-copy small { display: block; margin-top: 18px; color: #554e77; font-family: var(--mono); font-size: 9px; text-transform: uppercase; }

    .site-footer { color: var(--cream); background: var(--ink); }
    .footer-grid { width: var(--wrap); margin: 0 auto; padding: 58px 0 24px; display: grid; grid-template-columns: 1.5fr repeat(3, .65fr); gap: 58px; }
    .footer-brand strong { font-size: 21px; }
    .footer-brand p { max-width: 400px; margin: 16px 0 0; color: rgba(244, 235, 218, .62); font-size: 13px; line-height: 1.58; }
    .footer-col { display: grid; align-content: start; gap: 9px; }
    .footer-col span { margin-bottom: 7px; color: var(--lavender); font-family: var(--mono); font-size: 9px; text-transform: uppercase; }
    .footer-col a { color: rgba(244, 235, 218, .7); font-size: 12px; }
    .footer-col a:hover { color: var(--cream); }
    .footer-bottom { grid-column: 1 / -1; display: flex; justify-content: space-between; gap: 25px; margin-top: 25px; padding-top: 20px; border-top: 1px solid rgba(244, 235, 218, .17); color: rgba(244, 235, 218, .45); font-size: 10px; }

    @media (max-width: 1220px) {
      .nav-links { display: none; }
      .hero { grid-template-columns: 1fr 1fr; gap: 42px; }
      .hero h1 { font-size: clamp(52px, 6.6vw, 74px); }
      .validation-track { grid-template-columns: repeat(3, 1fr); }
      .validation-step { border-bottom: 1px solid var(--line); }
      .validation-step:nth-child(3) { border-right: 0; }
    }
    @media (max-width: 920px) {
      :root { --wrap: min(100% - 44px, 1440px); }
      .section { padding: 64px 22px; }
      .hero { grid-template-columns: 1fr; min-height: 0; padding-top: 60px; }
      .hero-copy { max-width: none; }
      .artwork { max-width: 780px; }
      .section-head, .architecture-shell, .architecture-note, .comparison-warning, .no-score, .participate, .newsletter { grid-template-columns: 1fr; gap: 34px; }
      .instrument-facts, .context-fields, .scoring-rules { grid-template-columns: 1fr 1fr; }
      .instrument-facts article:nth-child(2) { border-right: 0; }
      .instrument-facts article { border-bottom: 1px solid var(--line); }
      .instrument-facts article:nth-child(3), .instrument-facts article:nth-child(4) { border-bottom: 0; }
      .family-panel + .family-panel { border-left: 0; border-top: 1px solid var(--line); }
      .parallel-grid { grid-template-columns: 1fr; gap: 0; }
      .parallel-arrow { min-height: 70px; transform: rotate(90deg); }
      .scale { grid-template-columns: repeat(4, 1fr); }
      .scale-step { border-bottom: 1px solid var(--line-light); }
      .scale-step:nth-child(4) { border-right: 0; }
      .version-grid { grid-template-columns: 1fr; }
      .hub-grid .version-card { min-height: 0; }
      .version-card + .version-card { border-left: 0; border-top: 1px solid var(--line); }
      .participate-who { border-left: 0; border-top: 1px solid var(--line-light); }
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px 24px; }
      .footer-bottom { display: grid; }
    }
    @media (max-width: 640px) {
      :root { --wrap: calc(100% - 30px); }
      .section { padding: 54px 15px; }
      .nav { min-height: 78px; gap: 14px; }
      .brand { gap: 10px; }
      .brand-mark { width: 44px; height: 44px; }
      .brand-mark img { width: 31px; height: 31px; }
      .brand-copy strong { font-size: 15px; }
      .brand-copy small, .language, .nav-cta { display: none; }
      .menu-dropdown > summary { min-width: 68px; min-height: 44px; }
      .menu-panel { right: -1px; width: calc(100vw - 30px); grid-template-columns: 1fr; max-height: calc(100vh - 100px); overflow: auto; }
      .hero h1 { font-size: clamp(43px, 13.3vw, 59px); }
      .hero-lede { font-size: 16px; }
      .hero-actions { flex-direction: column; align-items: stretch; }
      .artwork figcaption { grid-template-columns: 1fr; }
      .section-head h2, .newsletter h2 { font-size: 40px; }
      .instrument-facts, .context-fields, .scoring-rules, .validation-track { grid-template-columns: 1fr; }
      .instrument-facts article { padding: 21px 0; border-right: 0; border-bottom: 1px solid var(--line) !important; }
      .instrument-facts article:last-child { border-bottom: 0 !important; }
      .factor-list { grid-template-columns: 1fr; }
      .factor-list div:nth-child(even) { padding-left: 0; border-left: 0; }
      .scale { grid-template-columns: 1fr 1fr; }
      .scale-step:nth-child(even) { border-right: 0; }
      .scoring-rule { min-height: 0; padding: 21px 0; border-right: 0; border-bottom: 1px solid var(--line-light); }
      .scoring-rule + .scoring-rule { padding-left: 0; }
      .version-card { min-height: 0; padding: 26px 21px; }
      .version-card h3 { margin-top: 34px; font-size: 27px; }
      .version-card .button { width: 100%; margin-top: 22px; }
      .validation-step { min-height: 0; padding: 27px 0; border-right: 0; border-bottom: 1px solid var(--line); }
      .validation-step h3 { margin-top: 30px; }
      .participate-copy, .participate-who { padding: 28px 24px; }
      .participate-copy h3 { font-size: 27px; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }