:root {
    /* Core neutrals */
    --ink:#1b1d18;--forest:#3d4a41;--mist:#8c9b98;--paper:#f3f3f3;--white:#ffffff;
    /* Signal */
    --highlight:#e71e10;
    /* Plum family */
    --plum-deep:#633162;--plum:#7c3f7a;--plum-light:#a177a0;
    /* Sky family */
    --sky-light:#9acfef;--sky:#469dc6;--sky-deep:#327492;
    /* Accent spectrum */
    --lime:#a6b228;--gold:#d7b728;--tangerine:#e87b26;--coral:#d25c34;
    --wine:#5b2233;--lavender:#8d7dbc;--azure:#3b88de;
    /* On-color text roles */
    --on-ink:#ffffff;--on-ink-secondary:#8c9b98;
    --on-forest:#ffffff;--on-forest-secondary:#f3f3f3;
    --on-light:#1b1d18;--on-light-secondary:#4a5a57;
    /* Semantic theme variables — light defaults; .bg-* classes override them.
       Components reference ONLY these, never literal colors, so a component
       cannot be wrong on any background. */
    --text-1:#1b1d18;          /* primary text */
    --text-2:#4a5a57;          /* muted secondary (section ledes) */
    --card-text:#4a5a57;       /* copy inside card chrome */
    --wash-1:#ffffff;          /* card fill */
    --wash-2:#ffffff;          /* pill/callout fill */
    --line-1:rgba(27,29,24,0.08);   /* card hairline */
    --line-2:rgba(27,29,24,0.16);   /* pill/callout hairline */
    --hairline:rgba(27,29,24,0.1);  /* list/step dividers */
    --rule-c:rgba(140,155,152,0.4); /* the short section rule */
    /* Type roles */
    --font-h1:'Helvetica Now Display','Helvetica Neue',Helvetica,'Inter',Arial,sans-serif;
    --font-h2:'Helvetica Now Display','Helvetica Neue',Helvetica,'Inter',Arial,sans-serif;
    --font-h3:'Helvetica Now Display','Helvetica Neue',Helvetica,'Inter',Arial,sans-serif;
    --font-quote:'Helvetica Now Text','Helvetica Neue',Helvetica,'Inter',Arial,sans-serif;
    --font-cite:'Helvetica Now Text','Helvetica Neue',Helvetica,'Inter',Arial,sans-serif;
    --font-caption:'Helvetica Now Micro','Helvetica Now Text','Helvetica Neue',Helvetica,'Inter',Arial,sans-serif;
    --font-body:'Source Serif 4','Source Serif Pro',Georgia,serif;
  }
  *,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{font-family:var(--font-body);color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased}
  a{color:inherit}
  code{font-family:var(--font-caption);font-size:.82em;background:rgba(27,29,24,0.08);padding:1px 4px;border-radius:2px}

  /* ── Scroll progress ───────────────────────────────────────────── */
  .progress-track{position:fixed;top:0;left:0;right:0;height:3px;background:var(--paper);z-index:1000}
  .progress-bar{height:100%;background:var(--highlight);width:0%;transition:width .1s linear}

  /* ── Header (fixed, scroll-aware, theme-aware) ─────────────────── */
  .site-header{position:fixed;top:3px;left:0;right:0;z-index:900;padding:16px 48px;display:flex;align-items:center;justify-content:space-between;gap:16px;transition:background .3s,box-shadow .3s}
  .site-header.scrolled{background:rgba(243,243,243,0.95);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);box-shadow:0 1px 0 rgba(27,29,24,0.08)}
  .site-header.scrolled.on-dark{background:rgba(27,29,24,0.85);box-shadow:0 1px 0 rgba(255,255,255,0.05)}
  .brand-link{display:flex;align-items:center;gap:16px;text-decoration:none;color:var(--ink)}
  .site-header.on-dark .brand-link{color:var(--on-ink)}
  .u-logo,.header-logo{height:32px;width:auto;flex-shrink:0;color:currentColor}
  .header-title{font-family:var(--font-h2);font-size:.92rem;font-weight:700;letter-spacing:-.01em}
  .header-nav{display:flex;align-items:center;gap:18px}
  .header-nav a{font-family:var(--font-cite);font-size:.78rem;color:var(--mist);text-decoration:none}
  .header-nav a:hover{color:currentColor}

  /* ── Section system ────────────────────────────────────────────── */
  .section{position:relative;overflow:hidden}
  .section-inner{max-width:860px;margin:0 auto;padding:120px 60px;position:relative;z-index:2}
  .section--compact .section-inner{padding:96px 60px}     /* denser rhythm (Guide pages) */
  .section--hero{min-height:100vh;display:flex;align-items:center;justify-content:center}
  .section--hero .section-inner{padding-top:80px;padding-bottom:80px}
  .section--hero-compact{min-height:76vh;display:flex;align-items:center}                      /* Guide/portal archetype */
  .section--hero-compact .section-inner{padding-top:120px;padding-bottom:80px}
  .section--close{min-height:50vh;display:flex;align-items:center;justify-content:center;text-align:center}

  /* ── Background / theme classes (pair each with data-theme) ────── */
  /* Dark family: shared semantic values, then each sets its surface */
  .bg-ink,.bg-forest,.bg-plum-deep,.bg-sky-deep,.bg-wine,.bg-plum-light{
    color:var(--text-1);
    --text-1:#ffffff;--text-2:#f3f3f3;--card-text:#f3f3f3;
    --wash-1:rgba(255,255,255,0.04);--wash-2:rgba(255,255,255,0.06);
    --line-1:rgba(255,255,255,0.08);--line-2:rgba(255,255,255,0.16);
    --hairline:rgba(255,255,255,0.1);--rule-c:rgba(255,255,255,0.15)}
  .bg-ink{background:var(--ink);--text-2:#8c9b98}  /* ink's muted secondary is mist */
  .bg-forest{background:var(--forest)}
  .bg-plum-deep{background:var(--plum-deep)}
  .bg-sky-deep{background:var(--sky-deep)}
  .bg-wine{background:var(--wine)}
  .bg-plum-light{background:var(--plum-light)}
  /* Light family: root defaults already correct; just set surface + color */
  .bg-paper{background:var(--paper);color:var(--text-1)}
  .bg-white{background:var(--white);color:var(--text-1)}

  /* ── Texture & ornament ────────────────────────────────────────── */
  .noise::after{content:'';position:absolute;inset:0;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");background-size:200px 200px;pointer-events:none;z-index:1}
  .convergence-field{position:absolute;inset:0;z-index:0;overflow:hidden;pointer-events:none}
  .convergence-field svg{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:140%;height:140%}
  .accent-bar{position:absolute;top:0;left:0;right:0;height:4px;background:var(--highlight);z-index:10}

  /* ── Type scale ────────────────────────────────────────────────── */
  .t-display{font-family:var(--font-h1);font-size:clamp(2.6rem,5.5vw,4rem);font-weight:900;line-height:1.02;letter-spacing:-.03em}
  .t-heading{font-family:var(--font-h2);font-size:clamp(1.9rem,4vw,3rem);font-weight:700;line-height:1.1;letter-spacing:-.02em}
  .t-subheading{font-family:var(--font-h3);font-size:clamp(1.1rem,2vw,1.4rem);font-weight:300;line-height:1.3}
  .t-body{font-family:var(--font-body);font-size:clamp(1rem,1.4vw,1.18rem);line-height:1.7;font-weight:400}
  .t-small{font-family:var(--font-cite);font-size:.88rem;line-height:1.55;font-weight:300}
  .t-mono{font-family:var(--font-caption);font-size:.73rem;letter-spacing:.09em;text-transform:uppercase}
  .t-quote{font-family:var(--font-quote);font-weight:700;font-style:italic;font-size:clamp(1.05rem,1.8vw,1.25rem);line-height:1.5}
  .t-cite{font-family:var(--font-cite);font-weight:300;font-size:.9rem;line-height:1.55;color:var(--mist)}
  .bold{font-weight:700}

  /* ── Text-color utilities (auto-adapt to dark sections) ────────── */
  .c-highlight{color:var(--highlight)}
  .c-mist{color:var(--mist)}
  .c-secondary{color:var(--text-2)}

  /* ── Rules & labels ────────────────────────────────────────────── */
  .rule{width:44px;height:3px;background:var(--rule-c);border:none;margin:28px 0}
  .breadcrumb{font-family:var(--font-caption);font-size:.73rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--mist);margin-bottom:36px}
  .breadcrumb a{text-decoration:none}
  .breadcrumb a:hover{color:var(--text-1)}
  .eyebrow{font-family:var(--font-caption);font-size:.76rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--highlight);margin-bottom:18px}

  /* ── Hero deck (left-aligned variant) ──────────────────────────── */
  .hero-deck{max-width:760px}
  .hero-deck .t-subheading{color:var(--text-2);max-width:660px;margin-top:22px}

  /* ── Buttons ───────────────────────────────────────────────────── */
  .btn-row{display:flex;gap:14px;margin-top:36px;flex-wrap:wrap}
  .btn{font-family:var(--font-caption);font-size:.78rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:#fff;text-decoration:none;padding:12px 24px;border-radius:2px;display:inline-block;transition:opacity .15s}
  .btn:hover{opacity:.85}

  /* ── Status pills & strip ──────────────────────────────────────── */
  .status-strip{display:flex;gap:18px;flex-wrap:wrap;margin-top:42px}
  .status-pill{font-family:var(--font-caption);font-size:.72rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase;padding:8px 12px;border:1px solid var(--line-2);border-left:3px solid var(--coral);border-radius:2px;background:var(--wash-2)}

  /* ── Callout panel ─────────────────────────────────────────────── */
  .intro-panel{margin-top:34px;padding:26px 30px;border-left:4px solid var(--highlight);background:var(--wash-2);border-top:1px solid var(--line-2);border-right:1px solid var(--line-2);border-bottom:1px solid var(--line-2)}
  .intro-panel p{color:var(--card-text)}

  /* ── Card primitives (shared title/copy) ───────────────────────── */
  .item-title,.sc-name{font-family:var(--font-h2);font-weight:700;font-size:1rem;letter-spacing:-.02em;margin-bottom:6px}
  .item-copy,.sc-desc{font-family:var(--font-body);font-size:.9rem;line-height:1.62;color:var(--card-text)}

  /* Generic card chrome — used by method / status / dispatch / portal */
  .method-item,.status-card,.dispatch-card,.portal-card{padding:24px 28px;border-radius:2px;background:var(--wash-1);border:1px solid var(--line-1);border-left:3px solid var(--sky)}

  /* ── Grids ─────────────────────────────────────────────────────── */
  .section-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:36px}
  .method-list{display:grid;gap:14px;margin-top:34px}
  .status-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:32px}

  /* ── Status card ──────────────────────────────────────────────── */
  .sc-desc{font-size:.85rem;line-height:1.6}

  /* ── Dispatch grid (5-up capability strip) ─────────────────────── */
  .dispatch-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-top:34px}
  .dispatch-card{padding:18px 16px;text-align:left;border-left-color:var(--coral)}
  .dispatch-card:nth-child(2){border-left-color:var(--sky)}
  .dispatch-card:nth-child(3){border-left-color:var(--plum)}
  .dispatch-card:nth-child(4){border-left-color:var(--lime)}
  .dispatch-card:nth-child(5){border-left-color:var(--tangerine)}
  .dispatch-card .item-title{font-size:.86rem}
  .dispatch-card .item-copy{font-size:.8rem}

  /* ── Portal grid (linked cards, hover lift) ────────────────────── */
  .portal-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:38px}
  .portal-card{display:block;color:inherit;text-decoration:none;transition:transform .15s,box-shadow .15s,border-color .15s}
  .portal-card:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(27,29,24,0.12);border-color:rgba(27,29,24,0.18)}
  .portal-card:nth-child(2){border-left-color:var(--plum)}
  .portal-card:nth-child(3){border-left-color:var(--sky)}
  .portal-card:nth-child(4){border-left-color:var(--lime)}
  .portal-meta{font-family:var(--font-caption);font-size:.68rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--mist);margin-top:18px}

  /* ── Charter grid (4 labelled blocks, color-coded) ─────────────── */
  .charter-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:38px}
  .charter-block{padding:26px 28px;background:var(--wash-1);border:1px solid var(--line-1);border-left:3px solid var(--lavender);border-radius:2px}
  .charter-block:nth-child(2){border-left-color:var(--sky)}
  .charter-block:nth-child(3){border-left-color:var(--tangerine)}
  .charter-block:nth-child(4){border-left-color:var(--lime)}
  .charter-block h3{font-family:var(--font-h2);font-size:1rem;font-weight:700;letter-spacing:-.01em;margin-bottom:10px}
  .charter-block p,.charter-block li{font-family:var(--font-body);font-size:.9rem;line-height:1.62;color:var(--card-text)}
  .charter-block ul{padding-left:18px}
  .charter-block li{margin-bottom:6px}

  /* ── Question cards ────────────────────────────────────────────── */
  .q-grid{display:flex;flex-direction:column;gap:18px;margin-top:36px}
  .q-card{padding:24px 28px;border-radius:2px;background:var(--wash-1);border:1px solid var(--line-1)}
  .q-card-q{font-family:var(--font-h3);font-weight:300;font-size:1.1rem;color:var(--text-1);line-height:1.35}
  .q-card-context{font-family:var(--font-body);font-size:.85rem;line-height:1.6;color:var(--card-text);margin-top:8px}

  /* ── Migration / process steps ─────────────────────────────────── */
  .migration{display:grid;gap:0;margin-top:38px;border-top:1px solid var(--hairline)}
  .migration-step{display:grid;grid-template-columns:42px 1fr auto;gap:18px;align-items:start;padding:22px 0;border-bottom:1px solid var(--hairline)}
  .step-num{font-family:var(--font-h1);font-size:1.8rem;font-weight:900;line-height:1;color:var(--mist)}
  .step-title{font-family:var(--font-h2);font-size:1rem;font-weight:700;letter-spacing:-.01em;margin-bottom:4px}
  .step-desc{font-family:var(--font-body);font-size:.9rem;line-height:1.58;color:var(--on-light-secondary)}
  .step-status{font-family:var(--font-caption);font-size:.68rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase;padding:5px 8px;border-radius:2px;white-space:nowrap}
  .step-done{background:rgba(166,178,40,0.18);color:#65700c}
  .step-next{background:rgba(27,29,24,0.08);color:var(--on-light-secondary)}

  /* ── Architecture block (Now / Later states) ───────────────────── */
  .architecture-block{margin-top:38px;background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.12);border-radius:3px;overflow:hidden}
  .arch-state{padding:24px 28px;border-bottom:1px solid rgba(255,255,255,0.1)}
  .arch-state:last-child{border-bottom:0}
  .arch-label{font-family:var(--font-caption);font-size:.73rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--sky-light);margin-bottom:12px}
  .arch-flow{font-family:var(--font-h2);font-size:1.02rem;font-weight:700;line-height:1.45;letter-spacing:-.01em;color:var(--white)}
  .arch-note{font-family:var(--font-body);font-size:.9rem;line-height:1.6;color:var(--on-forest-secondary);margin-top:12px}

  /* ── Layered architecture diagram (stack) ──────────────────────── */
  .arch-diagram{max-width:500px;margin:36px auto 0}
  .arch-stack{display:flex;flex-direction:column}
  .iface-layer,.wb-layer,.ag-layer{background:rgba(255,255,255,0.10);border:1px solid rgba(255,255,255,0.15);border-radius:3px}
  .iface-layer{padding:16px 20px 14px;position:relative}
  .wb-layer{border-radius:4px;padding:18px 20px 16px}
  .ag-layer{border-radius:4px;padding:18px 20px 16px;margin-top:8px}
  .layer-t{font-family:var(--font-h1);font-weight:900;font-size:1.25rem;letter-spacing:-.03em;color:var(--white);line-height:1.1}
  .layer-s{font-family:var(--font-body);font-size:.82rem;font-weight:400;color:var(--on-forest-secondary);margin-top:3px}
  .guide-c{margin-top:0;margin-bottom:10px;background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.12);border-radius:3px;padding:10px 16px;display:flex;align-items:baseline;gap:10px}
  .guide-c .gn{font-family:var(--font-h2);font-weight:700;font-size:1rem;letter-spacing:-.02em;color:var(--white)}
  .guide-c .gr{font-family:var(--font-body);font-size:.82rem;font-weight:400;color:var(--on-forest-secondary)}
  .v-conn{display:flex;flex-direction:column;align-items:center;height:14px}
  .v-conn-line{width:1.5px;flex:1;background:rgba(255,255,255,0.3)}
  .dial-wrap{padding:2px 0;display:flex;flex-direction:column;align-items:center}
  .dial-comp{display:flex;flex-direction:column;align-items:center;width:100%;max-width:460px}
  .dial-svg{display:block;width:100%;max-width:420px;height:auto}
  .dial-nm{font-family:var(--font-caption);font-size:.62rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--on-forest-secondary);margin-top:4px}
  .cap-g{margin-top:10px;display:flex;flex-wrap:wrap;gap:6px}
  .cap-p{font-family:var(--font-h2);font-weight:700;font-size:.78rem;letter-spacing:-.01em;color:var(--white);background:rgba(255,255,255,0.12);border:1px solid rgba(255,255,255,0.18);border-radius:3px;padding:5px 12px}

  /* ── Market-positioning diagram (in-between flow) ──────────────── */
  .pos-layout{display:flex;gap:0;align-items:stretch;margin-top:56px}
  .q-panel{display:flex;flex-direction:column;justify-content:center;padding-right:28px;flex-shrink:0;max-width:220px;position:relative}
  .q-panel::after{content:'';position:absolute;right:0;top:10%;bottom:10%;width:1px;background:linear-gradient(180deg,transparent,rgba(255,255,255,0.25) 25%,rgba(255,255,255,0.25) 75%,transparent)}
  .q-list{display:flex;flex-direction:column;gap:14px}
  .q-item{font-family:var(--font-body);font-size:.88rem;font-style:italic;color:var(--paper);line-height:1.5}
  .flow-col{display:flex;flex-direction:column;align-items:center;flex:1;min-width:0;padding-left:28px}
  .f-box{width:100%;border-radius:4px;text-align:center}
  .f-box-sec{background:rgba(255,255,255,0.1);border:1px solid rgba(255,255,255,0.18);padding:22px 24px}
  .f-box-sec .fb-t{font-family:var(--font-h2);font-weight:700;font-size:.95rem;letter-spacing:-.02em;color:var(--white)}
  .f-box-sec .fb-s{font-family:var(--font-body);font-size:.82rem;color:var(--paper);font-weight:300;margin-top:4px}
  .f-box-pri{background:var(--white);padding:36px 24px;box-shadow:0 4px 24px rgba(0,0,0,0.18)}
  .f-box-pri .fb-t{font-family:var(--font-h1);font-weight:900;font-size:1.5rem;letter-spacing:-.03em;color:var(--ink);line-height:1.1}
  .f-conn{display:flex;flex-direction:column;align-items:center;height:32px;justify-content:space-between;padding:2px 0}
  .f-au{width:0;height:0;border-left:4.5px solid transparent;border-right:4.5px solid transparent;border-bottom:5px solid rgba(255,255,255,0.4)}
  .f-ad{width:0;height:0;border-left:4.5px solid transparent;border-right:4.5px solid transparent;border-top:5px solid rgba(255,255,255,0.4)}
  .f-bl{width:1.5px;flex:1;background:rgba(255,255,255,0.3)}

  /* ── Vision teaser & attribution ───────────────────────────────── */
  .vision-teaser{margin-top:48px;padding:28px 0 0;border-top:1px solid rgba(255,255,255,0.08)}
  .vision-teaser p{font-family:var(--font-body);font-size:.92rem;line-height:1.65;color:var(--text-2)}
  .vision-teaser a{color:var(--sky-light);text-decoration:underline;text-underline-offset:3px}
  .vision-teaser a:hover{color:var(--text-1)}
  .attribution{font-family:var(--font-caption);font-size:.73rem;letter-spacing:.06em;margin-top:48px}

  /* ── Footer ────────────────────────────────────────────────────── */
  .site-footer{padding:28px 48px;background:var(--paper);display:flex;align-items:center;justify-content:space-between;border-top:1px solid rgba(27,29,24,0.1)}
  .footer-brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
  .footer-wordmark{font-family:var(--font-caption);font-size:.78rem;font-weight:700;letter-spacing:.04em;color:var(--ink);text-transform:uppercase}
  .footer-link{font-family:var(--font-cite);font-size:.78rem;color:var(--mist);text-decoration:none}
  .footer-link:hover{color:var(--ink)}

  /* ── Reveal animation ──────────────────────────────────────────── */
  @keyframes fadeUp{from{opacity:0;transform:translateY(28px)}to{opacity:1;transform:translateY(0)}}
  .anim.visible{animation:fadeUp .7s cubic-bezier(.22,1,.36,1) forwards}
  .anim-d1.visible{animation-delay:.08s}.anim-d2.visible{animation-delay:.16s}
  .anim-d3.visible{animation-delay:.24s}.anim-d4.visible{animation-delay:.32s}

  /* ── Responsive ────────────────────────────────────────────────── */
  @media(max-width:900px){
    .dispatch-grid{grid-template-columns:1fr 1fr}
  }
  @media(max-width:768px){
    .site-header{padding:14px 24px}.header-nav{display:none}
    .section-inner{padding:80px 28px}
    .section--hero .section-inner,.section--hero-compact .section-inner{padding-top:104px}
    .section-grid,.charter-grid,.status-grid{grid-template-columns:1fr}
    .migration-step{grid-template-columns:32px 1fr;gap:14px}
    .step-status{grid-column:2;justify-self:start}
    .dispatch-grid,.portal-grid{grid-template-columns:1fr}
    .btn-row{flex-direction:column}
    .pos-layout{flex-direction:column;gap:32px}
    .q-panel{max-width:100%;padding-right:0;padding-bottom:24px}
    .q-panel::after{width:100%;height:1px;top:auto;bottom:0;left:10%;right:10%;background:linear-gradient(90deg,transparent,rgba(231,30,16,0.6) 25%,rgba(231,30,16,0.6) 75%,transparent)}
    .flow-col{padding-left:0}
    .site-footer{padding:20px 24px;flex-direction:column;gap:8px;align-items:flex-start}
  }