/* ============================================================
   CoSimu — design system
   1 tokens · 2 base/type · 3 layout · 4 chrome · 5 hero + scenes
   6 diagrams · 7 page blocks · 8 legacy · 9 responsive
   hero-graph.js and hero-scene.js own their internals; only their
   container sizing lives here.
   ============================================================ */

/* ---------- 1. tokens ---------- */
:root{
  /* dark environments */
  --void:#04070E;
  --navy:#07111F;
  --deep:#061426;
  /* blue environments */
  --blue-sci:#0B2E74;
  --blue-sci-2:#071E4E;
  /* accents */
  --blue:#1554D8;
  --blue-deep:#0E3FA8;
  --blue-lit:#5B92FF;
  --cyan:#0A6E82;
  --cyan-lit:#6FD3F2;
  --amber:#E08A1E;
  --rust:#B23A22;
  /* light environments */
  --white:#FFFFFF;
  --paper:#F5F7FA;
  --bg:#FFFFFF;
  /* ink on light */
  --ink:#0A1526;
  --ink-2:#3D4E66;
  --ink-3:#5E7695;
  --ink-4:#93A5C0;      /* hairlines, borders, decorative fills only — never text */
  --label:#55698A;       /* small-label ink on light grounds (5.3:1 on white) */
  --line:#DCE4F0;
  --line-2:#C6D2E4;
  /* ink on dark */
  --d-head:#FFFFFF;
  --d-body:#E6EDF7;
  --d-soft:#E6EDF7;
  --d-faint:#AFC0D8;
  --d-line:rgba(255,255,255,.13);
  --d-line-2:rgba(255,255,255,.07);

  --ff-sans:"Archivo",-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Arial,sans-serif;
  --ff-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --ff-serif:var(--ff-sans);
  --ff-display:var(--ff-sans);
  --ff-body:var(--ff-sans);

  --maxw:1280px;
  --gutter:clamp(24px,6vw,72px);
  --pad-y:clamp(88px,11vw,150px);
}

/* ---------- 2. base + type ---------- */
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--ff-sans);font-size:17px;line-height:1.7;font-weight:400;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg{max-width:100%}
a{color:var(--blue);text-decoration:none;transition:color .15s}
a:hover{color:var(--blue-deep)}
p{margin:0}
h1,h2,h3,h4,h5{margin:0;font-family:var(--ff-sans);font-weight:600;letter-spacing:-.035em;line-height:1.06;text-wrap:balance}
h1{font-size:clamp(2.5rem,5.6vw,4.6rem);letter-spacing:-.042em;line-height:1.02}
h2{font-size:clamp(2rem,4.4vw,3.6rem)}
h3{font-size:clamp(1.3rem,2.1vw,1.75rem);letter-spacing:-.028em;line-height:1.16}
h4{font-size:19px;letter-spacing:-.02em;line-height:1.3}

.lede{font-size:clamp(1.05rem,1.45vw,1.3rem);line-height:1.68;color:var(--ink-2);max-width:56ch;text-wrap:pretty}
.body-l{font-size:17px;line-height:1.75;color:var(--ink-2);max-width:62ch;text-wrap:pretty}
.kicker{display:block;font-family:var(--ff-sans);font-size:11.5px;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--blue)}
.mono{font-family:var(--ff-mono);font-variant-numeric:tabular-nums}
.num{font-family:var(--ff-mono);font-variant-numeric:tabular-nums}

::selection{background:#CFE0FF;color:var(--ink)}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:2px}

/* ---------- 3. layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
.sec{padding:var(--pad-y) 0}
.sec-sm{padding:clamp(64px,8vw,104px) 0}

.s-light{background:var(--white);color:var(--ink)}
.s-paper{background:var(--paper);color:var(--ink)}
.s-void{background:var(--void);color:var(--d-body)}
.s-navy{background:var(--navy);color:var(--d-body)}
.s-blue{background:var(--blue-sci);color:var(--d-body);
  background-image:linear-gradient(176deg,#0C3382 0%,var(--blue-sci) 46%,var(--blue-sci-2) 100%)}

.s-void h1,.s-void h2,.s-void h3,.s-void h4,.s-navy h1,.s-navy h2,.s-navy h3,.s-navy h4,
.s-blue h1,.s-blue h2,.s-blue h3,.s-blue h4{color:var(--d-head)}
.s-void p,.s-navy p,.s-blue p{color:var(--d-soft)}
.s-void .lede,.s-navy .lede,.s-blue .lede,.s-void .body-l,.s-navy .body-l,.s-blue .body-l{color:var(--d-body)}
.s-void strong,.s-navy strong,.s-blue strong{color:#fff;font-weight:600}
.s-void .kicker,.s-navy .kicker{color:var(--cyan-lit)}
.s-blue .kicker{color:#8FC3FF}
.s-void a,.s-navy a,.s-blue a{color:#9DC2FF}
.s-void a:hover,.s-navy a:hover,.s-blue a:hover{color:#fff}

.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(30px,5vw,72px)}
.grid-aside{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.18fr);gap:clamp(30px,6vw,90px);align-items:start}
.stack-l{max-width:74ch}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;font-family:var(--ff-sans);font-weight:600;font-size:15.5px;letter-spacing:-.01em;padding:14px 24px;border:1px solid transparent;border-radius:4px;cursor:pointer;transition:background .16s,color .16s,border-color .16s}
.btn svg{width:15px;height:15px;transition:transform .18s cubic-bezier(.2,.7,.2,1)}
.btn:hover svg{transform:translateX(3px)}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-deep);color:#fff}
.btn-line{background:transparent;color:var(--ink);border-color:var(--line-2)}
.btn-line:hover{border-color:var(--ink);color:var(--ink)}
.s-void .btn-primary,.s-navy .btn-primary,.s-blue .btn-primary{background:#fff;color:var(--void)}
.s-void .btn-primary:hover,.s-navy .btn-primary:hover,.s-blue .btn-primary:hover{background:#D9E6FF;color:var(--void)}
.s-void .btn-line,.s-navy .btn-line,.s-blue .btn-line{color:#fff;border-color:rgba(255,255,255,.3)}
.s-void .btn-line:hover,.s-navy .btn-line:hover,.s-blue .btn-line:hover{border-color:#fff;color:#fff}
.actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px;align-items:center}

.arrow{display:inline-flex;align-items:center;gap:9px;font-weight:600;font-size:16px;color:var(--blue);margin-top:30px;transition:gap .16s}
.arrow:hover{gap:14px}
.arrow svg{width:14px;height:14px}
.s-void .arrow,.s-navy .arrow,.s-blue .arrow{color:#9DC2FF}

.reveal{opacity:1;transform:none}
.js-reveal .reveal:not(.in){opacity:0;transform:translateY(16px)}
.js-reveal .reveal{transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}

/* ---------- 4. header / footer ---------- */
header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.88);backdrop-filter:saturate(1.6) blur(14px);border-bottom:1px solid var(--line)}
body.dark-top header{background:rgba(4,7,14,.82);border-bottom:1px solid var(--d-line-2)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:28px;padding-top:16px;padding-bottom:16px}
.brand{display:inline-flex;align-items:center;gap:12px;color:var(--ink)}
.brand:hover{color:var(--ink)}
.brand .glyph{width:28px;height:28px;flex:none}
.brand .lock{display:flex;flex-direction:column;gap:3px;line-height:1}
.brand .mark{font-weight:700;font-size:22px;letter-spacing:-.035em}
.brand .mark b{color:var(--blue);font-weight:700}
.brand .desc{font-size:10.5px;font-weight:500;letter-spacing:.085em;text-transform:uppercase;color:var(--ink-3);white-space:nowrap}
.brand .desc em{font-style:normal;color:var(--cyan);font-weight:600}
body.dark-top .brand,body.dark-top .brand:hover{color:#fff}
body.dark-top .brand .mark b{color:var(--blue-lit)}
body.dark-top .brand .desc{color:var(--d-faint)}
body.dark-top .brand .desc em{color:var(--cyan-lit)}

.navlinks{display:flex;align-items:center;gap:34px}
.navlinks a{font-size:15px;font-weight:500;color:var(--ink-2);letter-spacing:-.005em;transition:color .14s}
.navlinks a:hover{color:var(--ink)}
.navlinks a.active{color:var(--ink);font-weight:600}
body.dark-top .navlinks a{color:var(--d-soft)}
body.dark-top .navlinks a:hover,body.dark-top .navlinks a.active{color:#fff}
.menu-toggle{display:none;width:42px;height:38px;border:1px solid var(--line-2);border-radius:4px;background:transparent;cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:4px}
.menu-toggle span{display:block;width:17px;height:1.5px;background:var(--ink)}
body.dark-top .menu-toggle{border-color:rgba(255,255,255,.26)}
body.dark-top .menu-toggle span{background:#fff}

footer{background:var(--void);color:#E6EDF7;padding:clamp(60px,7vw,92px) 0 34px}
footer a{color:#E6EDF7}
footer a:hover{color:#fff}
.foot-top{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:clamp(32px,6vw,80px);align-items:start}
.foot-brand .brand,.foot-brand .brand:hover{color:#fff}
.foot-brand .brand .mark b{color:var(--blue-lit)}
.foot-brand .brand .desc{color:var(--d-faint)}
.foot-brand .brand .desc em{color:var(--cyan-lit)}
.foot-brand p{color:#C2D0E4;font-size:15.5px;line-height:1.7;margin-top:20px;max-width:44ch}
.foot-mails{display:flex;flex-direction:column;align-items:flex-start;gap:6px;margin-top:20px}
.foot-mail{display:inline-block;font-size:16.5px;font-weight:600;color:#fff;letter-spacing:-.015em}
.foot-mail:hover{color:var(--cyan-lit)}
.foot-nav{display:flex;flex-direction:column;align-items:flex-start;gap:2px}
.foot-nav a{display:block;font-size:15.5px;font-weight:500;padding:6px 0}
@media(max-width:860px){.foot-nav{flex-direction:row;flex-wrap:wrap;gap:6px 32px}}
.foot-bot{display:flex;justify-content:space-between;gap:14px 30px;flex-wrap:wrap;margin-top:clamp(48px,6vw,72px);padding-top:24px;border-top:1px solid var(--d-line-2);font-size:14px;color:#AFC0D8}

/* inline brand mentions */
.cosimu{font-weight:600;color:inherit;letter-spacing:-.015em}
.cosimu b{font-weight:700;color:var(--blue)}
.cosimulator{font-weight:600;color:var(--cyan)}
.s-void .cosimu b,.s-navy .cosimu b,footer .cosimu b{color:var(--blue-lit)}
.s-blue .cosimu b{color:#9DC2FF}
.s-void .cosimulator,.s-navy .cosimulator,.s-blue .cosimulator,footer .cosimulator{color:var(--cyan-lit)}
.btn-primary .cosimu,.btn-primary .cosimu b,.btn-primary .cosimulator,
.navlinks a.btn-primary,.navlinks a.btn-primary:hover{color:currentColor}

/* ---------- 5. hero + scenes ---------- */
.hero{position:relative;overflow:hidden;padding:clamp(34px,5vw,58px) 0 clamp(56px,7vw,92px);background:var(--white)}
.hero-top{text-align:center;max-width:64ch;margin:0 auto}
.hero h1.wordmark{font-size:clamp(3.4rem,9.5vw,7.2rem);font-weight:700;letter-spacing:-.055em;line-height:.9}
.hero h1.wordmark b{font-weight:700;color:var(--blue)}
.hero-def{font-size:clamp(1.15rem,2vw,1.6rem);font-weight:500;line-height:1.35;color:var(--ink);margin:18px auto 0;max-width:30ch;letter-spacing:-.02em;text-wrap:balance}
.hero-graph{position:relative;max-width:1180px;margin:clamp(20px,3vw,34px) auto 0;aspect-ratio:1200/620}
.hero-graph svg{position:absolute;inset:0;width:100%;height:100%;overflow:visible}
.graph-legend{display:flex;align-items:center;justify-content:space-between;gap:10px 24px;flex-wrap:wrap;max-width:1180px;margin:0 auto}
.graph-legend .keys{display:flex;align-items:center;gap:18px;flex-wrap:wrap;font-family:var(--ff-mono);font-size:11.5px;color:var(--ink-3)}
.graph-legend .lg{display:inline-flex;align-items:center;gap:7px}
.graph-legend .sw{width:18px;height:3px;border-radius:2px;display:inline-block}
.graph-legend .sw.ring{width:9px;height:9px;border-radius:50%;background:transparent;border:1.5px dashed var(--amber)}
.graph-legend .clock{font-family:var(--ff-mono);font-size:11.5px;color:var(--ink-3);white-space:nowrap}
.hero-foot{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:clamp(24px,5vw,64px);align-items:end;margin-top:clamp(34px,4.5vw,56px);padding-top:clamp(26px,3vw,36px);border-top:1px solid var(--line)}
.hero-foot p{font-size:17.5px;line-height:1.72;color:var(--ink-2);max-width:58ch;text-wrap:pretty}
.hero-foot .actions{margin-top:0;justify-content:flex-end}
/* Homepage research-scope note, positioned immediately above the blue section. */
.scope-note{background:var(--white);padding:0 0 clamp(18px,2.4vw,30px)}
.scope-note p{max-width:1000px;margin:0 auto;padding:13px 20px;border-top:1px solid #B8C5D7;border-bottom:1px solid #B8C5D7;background:#F8FAFD;color:#26364E;font-size:clamp(13px,1.08vw,15px);font-weight:500;line-height:1.55;text-align:center;text-wrap:pretty}
.scope-note strong{color:#A62232;font-weight:700;margin-right:.2em}


/* three.js orchestration stage — light instrument inside a dark page */
.stage-bleed{max-width:1660px;margin:0 auto;padding:0 clamp(16px,3vw,44px)}
.stage{position:relative;background:#F7F9FC;overflow:hidden;
  height:clamp(430px,68vh,760px);border:1px solid rgba(255,255,255,.14)}
.stage cosim-hero-scene{position:absolute;inset:0;display:block}
.stage-rail{display:flex;align-items:center;justify-content:center;gap:10px 26px;flex-wrap:wrap;margin-top:18px;font-family:var(--ff-mono);font-size:12px;color:#C2D0E4}
.stage-rail .keys{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.stage-rail .lg{display:inline-flex;align-items:center;gap:7px}
.stage-rail .sw{width:18px;height:3px;border-radius:2px;display:inline-block}
.stage-rail .sw.ring{width:9px;height:9px;border-radius:50%;background:transparent;border:1.5px dashed var(--amber)}
.stage-note{font-size:14.5px;line-height:1.7;color:#C2D0E4;margin:16px auto 0;max-width:74ch;text-align:center}
.stage-fallback{position:absolute;inset:0;display:grid;place-items:center;padding:clamp(24px,5vw,56px);text-align:center;background:var(--paper)}
.stage:has(cosim-hero-scene canvas) .stage-fallback{display:none}
.stage-fallback p{font-size:15.5px;line-height:1.7;color:var(--ink-2);max-width:52ch}
.stage-fallback strong{display:block;font-size:17px;font-weight:600;color:var(--ink);margin-bottom:10px}
.stage cosim-hero-scene{background:var(--white)}
.stage .cs-fallback{position:absolute;inset:0;display:grid;place-items:center;font-family:var(--ff-mono);font-size:12px;letter-spacing:.14em;color:var(--ink-3);background:var(--paper);z-index:2}

/* page opening */
.opening{padding:clamp(68px,9vw,124px) 0 clamp(40px,5vw,64px)}
.opening h1{max-width:17ch}
.opening .lede{margin-top:26px}

/* ---------- 6. diagrams ---------- */
.figure{margin:0}
.figure svg{display:block;width:100%;height:auto}
figcaption{font-family:var(--ff-mono);font-size:11.5px;letter-spacing:.04em;color:var(--label);margin-top:16px;line-height:1.6}
.s-void figcaption,.s-navy figcaption,.s-blue figcaption{color:var(--d-faint)}

/* architecture diagram */
.arch{margin-top:clamp(44px,6vw,72px)}
.arch svg{display:block;width:100%;height:auto}
.arch .ax-h{font-family:var(--ff-mono);font-size:13px;font-weight:500;letter-spacing:.18em;fill:var(--cyan-lit)}
.arch .ax-s{font-family:var(--ff-sans);font-size:15px;fill:#B8C7DE}
.arch .ax-t{font-family:var(--ff-sans);font-size:19px;font-weight:600;letter-spacing:-.02em;fill:#FFFFFF}
.arch .ax-t2{font-family:var(--ff-sans);font-size:17px;font-weight:600;letter-spacing:-.018em;fill:#FFFFFF}
.arch .planned .ax-t{fill:#D6E0EE}
.arch .rail{stroke:rgba(255,255,255,.16);stroke-width:1}
.arch .node{fill:var(--blue-lit)}
.arch .node.planned{fill:none;stroke:#5E7695;stroke-width:1.4}
.arch .wire{fill:none;stroke:rgba(110,155,255,.42);stroke-width:1.2}
.arch .wire.lead{stroke:var(--blue-lit);stroke-width:1.6}
.arch .core{fill:rgba(21,84,216,.10);stroke:rgba(91,146,255,.55);stroke-width:1.2}
.arch line.hair{stroke:rgba(255,255,255,.12);stroke-width:1}
.arch .axis{stroke:rgba(255,255,255,.18);stroke-width:1}
.arch .tick line{stroke:rgba(255,255,255,.18);stroke-width:1}
.arch .trace{fill:none;stroke:var(--blue-lit);stroke-width:2.2}
.arch .dotA{fill:#FF8BA3}.arch .dotB{fill:#F5C065}.arch .dotC{fill:var(--cyan-lit)}.arch .dotD{fill:#6FE0A8}
.arch-wide{display:block}
.arch-tall{display:none}
@media(max-width:1040px){.arch-wide{display:none}.arch-tall{display:block}}

/* recomposed mobile architecture */
.arch-tall{margin-top:36px}
.at-h{display:block;font-family:var(--ff-mono);font-size:11.5px;font-weight:500;letter-spacing:.18em;text-transform:uppercase;color:var(--cyan-lit)}
.at-sub{font-size:14.5px;color:#C2D0E4;margin-top:5px}
.at-list{margin-top:14px;border-top:1px solid var(--d-line)}
.at-list .i{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px solid var(--d-line)}
.at-list .t{font-size:17px;font-weight:600;color:#fff;letter-spacing:-.02em}
.at-list .d{font-size:14.5px;color:#C2D0E4;margin-top:4px}
.at-list .i.planned .t{color:#E6EDF7}
.at-list .tag{flex:none;font-family:var(--ff-mono);font-size:10.5px;letter-spacing:.13em;text-transform:uppercase;color:#A3B2C8}
.at-flow{display:block;text-align:center;font-size:15px;line-height:1;color:var(--blue-lit);margin:22px 0;letter-spacing:.3em}
.at-core{border:1px solid rgba(91,146,255,.45);background:rgba(21,84,216,.10);padding:20px}
.at-core .r{padding:14px 0;border-bottom:1px solid var(--d-line-2)}
.at-core .r:last-child{border-bottom:0;padding-bottom:0}
.at-core .r:first-of-type{border-top:1px solid var(--d-line-2);margin-top:14px}
.at-core .t{font-size:16.5px;font-weight:600;color:#fff}
.at-core .d{font-size:14.5px;color:#C2D0E4;margin-top:3px}
.at-out{margin-top:16px;border-top:1px solid var(--d-line)}
.at-out .s{display:grid;grid-template-columns:1.8rem minmax(0,1fr);gap:14px;padding:14px 0;border-bottom:1px solid var(--d-line)}
.at-out .n{font-family:var(--ff-mono);font-size:12px;color:var(--d-faint);padding-top:4px}
.at-out .t{font-size:16.5px;font-weight:600;color:#fff}
.at-out .d{font-size:14.5px;color:#C2D0E4;margin-top:3px}
.at-note{font-size:14px;line-height:1.65;color:#C2D0E4;margin-top:18px}

/* experiment trace figure */
.expl{margin:clamp(38px,5vw,60px) 0 0}
.expl svg{display:block;width:100%;height:auto}
.trace-fig .lab{font-family:var(--ff-mono);font-size:12px;font-weight:500;letter-spacing:.16em;text-transform:uppercase;fill:var(--label)}
.trace-fig .mono{font-family:var(--ff-mono);font-size:13px;fill:var(--label)}
.trace-fig .an{font-family:var(--ff-sans);font-size:15px;fill:var(--ink-2)}
.trace-fig .tk{font-family:var(--ff-sans);font-size:16px;font-weight:600;letter-spacing:-.015em;fill:var(--ink)}
.trace-fig .grid{stroke:var(--line);stroke-width:1}
.trace-fig .axis{stroke:var(--line-2);stroke-width:1}
.trace-fig .band{fill:rgba(21,84,216,.06)}
.trace-fig .bandline{stroke:rgba(21,84,216,.26);stroke-width:1;stroke-dasharray:2 4}
.trace-fig .run{fill:none;stroke:var(--rust);stroke-width:2.4}
.trace-fig .def{fill:none;stroke:var(--cyan);stroke-width:2.2;stroke-dasharray:7 5}
.trace-fig .flat{fill:none;stroke:#A8B4C6;stroke-width:1.8}
.trace-fig .thr{stroke:var(--rust);stroke-width:1;stroke-dasharray:4 4;opacity:.5}
.expl-legend{display:flex;flex-wrap:wrap;gap:10px 28px;margin-top:22px;font-family:var(--ff-mono);font-size:11.5px;color:var(--ink-3)}
.expl-legend span{display:inline-flex;align-items:center;gap:8px}
.expl-legend i{width:18px;height:0;border-top-width:2.4px;border-top-style:solid;display:inline-block}
.expl-wide{display:block}
.expl-tall{display:none}
@media(max-width:1040px){.expl-wide{display:none}.expl-tall{display:block}}
.expl-tall{margin-top:34px;border-top:1px solid var(--line)}
.expl-tall .s{display:grid;grid-template-columns:2.8rem minmax(0,1fr);gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}
.expl-tall .n{font-family:var(--ff-mono);font-size:13px;color:var(--label);padding-top:5px}
.expl-tall .t{font-size:17.5px;font-weight:600;letter-spacing:-.02em}
.expl-tall .d{font-size:15.5px;line-height:1.65;color:var(--ink-2);margin-top:6px}
.expl-tall .s.alt .t{color:var(--cyan)}

/* coupling diagram (research) */
.coup .cx-h{font-family:var(--ff-mono);font-size:13px;font-weight:500;letter-spacing:.17em;fill:var(--label)}
.coup .cx-t{font-family:var(--ff-sans);font-size:19px;font-weight:600;letter-spacing:-.02em;fill:var(--ink)}
.coup .cx-s{font-family:var(--ff-sans);font-size:15px;fill:var(--ink-2)}
.coup .cx-m{font-family:var(--ff-mono);font-size:13.5px;fill:var(--ink-2)}
.coup .rail{stroke:var(--line);stroke-width:1}
.coup .lane{fill:var(--paper)}
.coup .step{fill:none;stroke:var(--line-2);stroke-width:1;stroke-dasharray:3 4}
.coup .barA{stroke:#1554D8}.coup .barB{stroke:#0A6E82}.coup .barC{stroke:#5E7695}.coup .barD{stroke:#3D4E66}
.coup .bar line{stroke-width:1.6}
.coup-wide{display:block}
.coup-tall{display:none}
@media(max-width:1040px){.coup-wide{display:none}.coup-tall{display:block}}
.coup-tall{margin-top:28px;border-top:1px solid var(--line)}
.coup-tall .r{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px solid var(--line)}
.coup-tall .t{font-size:16.5px;font-weight:600;letter-spacing:-.02em}
.coup-tall .s{font-family:var(--ff-mono);font-size:12.5px;color:var(--ink-3);flex:none}
.coup-tall .note{font-size:15px;line-height:1.65;color:var(--ink-2);margin-top:18px}
.coup .sync{stroke:var(--blue);stroke-width:1.4}

/* ---------- 7. page blocks ---------- */
/* editorial numbered entries, no cards */
.entries{margin-top:clamp(44px,6vw,72px)}
.ent{padding:clamp(44px,5.5vw,72px) 0;border-top:1px solid var(--line)}
.ent:last-child{border-bottom:1px solid var(--line)}
.ent h3{max-width:24ch;font-size:clamp(1.5rem,2.6vw,2.15rem);letter-spacing:-.03em}
.ent .q{font-size:clamp(1.08rem,1.55vw,1.32rem);font-weight:400;line-height:1.62;color:var(--ink);margin-top:20px;max-width:56ch;letter-spacing:-.012em}
.s-blue .ent .q,.s-void .ent .q{color:#FFFFFF}
.ent .body{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(26px,4vw,60px);margin-top:28px;align-items:start}
.ent .body p{font-size:16.5px;line-height:1.78;color:var(--ink-2);text-wrap:pretty}
.ent .body p+p{margin-top:15px}
.ent dl{margin:0;border-top:1px solid var(--line)}
.ent dt{font-family:var(--ff-mono);font-size:11.5px;letter-spacing:.15em;text-transform:uppercase;color:var(--label);padding-top:15px}
.ent dd{margin:6px 0 15px;padding-bottom:15px;font-size:15.5px;line-height:1.6;color:var(--ink-2);border-bottom:1px solid var(--line)}
.s-void .ent,.s-void .ent:last-child,.s-void .ent dl,.s-void .ent dd,
.s-blue .ent,.s-blue .ent:last-child,.s-blue .ent dl,.s-blue .ent dd,
.s-navy .ent,.s-navy .ent:last-child,.s-navy .ent dl,.s-navy .ent dd{border-color:rgba(255,255,255,.16)}
.s-void .ent .mk,.s-void .ent dt,.s-blue .ent .mk,.s-blue .ent dt,.s-navy .ent .mk,.s-navy .ent dt{color:var(--d-faint)}
.s-blue .ent .mk,.s-blue .ent dt{color:#9FC0F0}
.s-void .ent .q{color:#9DC2FF}
.s-blue .ent .q,.s-navy .ent .q{color:#A8CBFF}
.s-void .ent .body p,.s-void .ent dd,.s-blue .ent .body p,.s-blue .ent dd,
.s-navy .ent .body p,.s-navy .ent dd{color:#E6EDF7}
.s-blue .ent h3{color:#fff}

/* four-idea ledger */
.ideas{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;margin-top:clamp(40px,5vw,60px);border-top:1px solid var(--line)}
.ideas > div{padding:26px 30px 0 0}
.ideas > div+div{border-left:1px solid var(--line);padding-left:30px}
.ideas h4{font-size:20px;letter-spacing:-.024em}
.ideas p{font-size:15.5px;line-height:1.72;color:var(--ink-2);margin-top:12px}
.s-void .ideas,.s-void .ideas > div+div{border-color:var(--d-line-2)}
.s-void .ideas .k{color:var(--cyan-lit)}
.s-void .ideas h4{color:#FFFFFF}
.s-void .ideas p{color:#E6EDF7}

/* sequence rail (platform: what you just watched) */
.seq{margin-top:clamp(40px,5vw,64px);display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 clamp(40px,6vw,88px)}
.seq .st{padding:26px 0 28px;border-top:1px solid var(--line)}
.seq .t{display:block;font-size:19px;font-weight:600;letter-spacing:-.024em;line-height:1.28;max-width:26ch}
.seq .d{font-size:16px;line-height:1.72;color:var(--ink-2);margin-top:12px;text-wrap:pretty}

/* status ledger */
.ledger{margin-top:clamp(30px,4vw,44px);border-top:1px solid var(--line)}
.ledger .r{display:grid;grid-template-columns:14rem minmax(0,1fr);gap:24px;padding:22px 0;border-bottom:1px solid var(--line)}
.ledger .k{font-size:16px;font-weight:600;letter-spacing:-.02em;color:var(--ink)}
.ledger .k em{display:block;font-style:normal;font-family:var(--ff-mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--label);margin-top:6px}
.ledger .v{font-size:16px;line-height:1.7;color:var(--ink-2)}
.ledger .v b{font-weight:600;color:var(--ink)}

/* pull statement */
.pull{font-size:clamp(1.3rem,2.4vw,2rem);font-weight:500;line-height:1.38;letter-spacing:-.028em;color:var(--ink);max-width:24ch;margin-top:30px;text-wrap:balance}
.s-void .pull,.s-blue .pull{color:#fff}
.caveat{margin-top:26px;font-size:15px;line-height:1.72;color:var(--ink-2);max-width:70ch}
.s-void .caveat,.s-navy .caveat,.s-blue .caveat{color:var(--d-faint)}

/* statement section (research problem) */
.statement h2{font-size:clamp(2.1rem,4.6vw,3.7rem);letter-spacing:-.038em;line-height:1.06;max-width:21ch}
.statement .sub{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(26px,5vw,72px);margin-top:clamp(44px,6vw,76px);padding-top:clamp(28px,4vw,42px);border-top:1px solid rgba(255,255,255,.22)}
.statement .sub p{font-size:clamp(1rem,1.35vw,1.2rem);line-height:1.7;color:#E6EDF7}
.statement .sub p+p{margin-top:17px}
.statement .sub em{font-style:italic;color:#fff}

/* closing */
.closing{padding:clamp(72px,9vw,124px) 0;text-align:center}
.closing .line{font-size:clamp(1.4rem,2.5vw,2.1rem);font-weight:500;line-height:1.4;letter-spacing:-.028em;color:var(--ink);max-width:34ch;margin:0 auto;text-wrap:pretty}
.mails{display:flex;flex-wrap:wrap;justify-content:center;align-items:baseline;gap:6px 26px;margin-top:clamp(30px,4vw,42px)}
.mails a{font-size:clamp(1.05rem,1.7vw,1.4rem);font-weight:600;letter-spacing:-.024em;color:var(--blue)}
.mails a:hover{text-decoration:underline;text-underline-offset:6px}
.mails .sep{color:var(--ink-4);font-size:18px;line-height:1}
.closing-row{display:flex;align-items:baseline;justify-content:center;gap:10px 30px;flex-wrap:wrap;margin-top:clamp(36px,4.5vw,52px);padding-top:26px;border-top:1px solid var(--line)}
.closing-links{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 30px}
.closing-links a{font-size:15.5px;font-weight:500;color:var(--ink-2)}
.closing-links a:hover{color:var(--blue)}
.s-void .mails a,.s-void .closing-links a{color:#FFFFFF}
.s-void .mails .sep{color:#5E7695}

/* contact */
.contact-main{padding:clamp(72px,12vw,150px) 0 clamp(80px,12vw,160px);min-height:60vh;display:flex;align-items:center}
.contact-main > .wrap{width:100%}
.contact-card{max-width:60rem;margin:0 auto;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(32px,6vw,80px);align-items:start}
@media(max-width:820px){.contact-card{grid-template-columns:1fr;gap:34px}}
.contact-card .kicker{color:var(--cyan-lit)}
.contact-card h1{font-size:clamp(2.1rem,4.2vw,3.1rem);color:#F3F7FE;letter-spacing:-.035em}
.contact-card .role{font-size:clamp(1.02rem,1.35vw,1.15rem);line-height:1.7;color:#E6EDF7;margin-top:20px}
.contact-card .who{margin-top:clamp(26px,3.4vw,38px);padding-top:26px;border-top:1px solid rgba(255,255,255,.14)}
.contact-card .who .pi{margin-top:7px;font-size:15.5px;line-height:1.5;color:#C2D0E4}
.contact-card .who .pi em{font-style:italic}
.contact-card .addr{padding:16px 0 18px;border-top:1px solid rgba(255,255,255,.14)}
.contact-card .addr:first-child{padding-top:4px;border-top:0}
.contact-card .addr .k{font-size:14px;font-weight:500;letter-spacing:-.005em;color:#C2D0E4}
.contact-card .addr .m{display:inline-block;margin-top:9px;font-size:clamp(1.05rem,1.6vw,1.32rem);font-weight:600;letter-spacing:-.024em;color:#FFFFFF}
.contact-card .addr .m:hover{color:var(--cyan-lit);text-decoration:underline;text-underline-offset:6px}
.contact-card .who .nm{font-size:17px;font-weight:600;color:#FFFFFF;letter-spacing:-.02em}
.contact-card .who .df{font-size:15px;line-height:1.7;color:#C2D0E4;margin-top:8px;max-width:46ch}

/* ---------- 8. legacy page components (about / publications / people) ---------- */
.section{padding:clamp(72px,9vw,124px) 0}
.section.tint{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section.dark{background:var(--void);color:var(--d-body)}
.section.dark h1,.section.dark h2,.section.dark h3,.section.dark h4{color:#fff}
.section.dark strong{color:#fff}
.section.dark .eyebrow,.section.dark .label{color:var(--cyan-lit)}
.section.dark .prose p,.section.dark p{color:#E6EDF7}
.section.dark .lede{color:var(--d-body)}
.section.dark a{color:#9DC2FF}
.section.dark .cosimu b{color:var(--blue-lit)}
.section.dark .cosimulator{color:var(--cyan-lit)}
.eyebrow,.label{display:block;font-family:var(--ff-mono);font-size:11.5px;font-weight:500;letter-spacing:.17em;text-transform:uppercase;color:var(--label)}
.head{max-width:48ch}
.head h2{margin-top:16px}
.head p{color:var(--ink-2);font-size:17.5px;line-height:1.7;margin-top:20px;max-width:62ch}
.head.wide{max-width:64ch}
.cols{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(36px,6vw,80px);align-items:start}
.cols.aside{grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr)}
.cols.figure{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);align-items:center}
.prose p{font-size:17px;line-height:1.75;color:var(--ink-2);max-width:66ch}
.prose p+p{margin-top:18px}
.prose em{font-style:italic;color:var(--ink)}
.masthead{position:relative;border-bottom:1px solid var(--line);padding:clamp(60px,8vw,104px) 0 clamp(44px,6vw,72px)}
.masthead h1{margin-top:18px;max-width:17ch}
.masthead .lede{margin-top:26px}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-2)}
.btn-ghost:hover{border-color:var(--ink)}
.btn-lg{padding:15px 28px;font-size:16px}
.hero-aura{display:none}
.faq{margin-top:48px;border-top:1px solid var(--line)}
.faq .qa{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(24px,5vw,56px);padding:30px 0;border-bottom:1px solid var(--line)}
.faq h3{font-size:20px;font-weight:600;max-width:26ch}
.faq p{color:var(--ink-2);font-size:16.5px;line-height:1.7;max-width:62ch}
.faq p+p{margin-top:12px}
.triad{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin-top:56px;border-top:1px solid var(--line)}
.triad > div{padding:26px 34px 0 0}
.triad > div+div{border-left:1px solid var(--line);padding-left:34px}
.triad h3{font-size:19px}
.triad p{color:var(--ink-2);font-size:15px;line-height:1.65;margin-top:10px}
.stages{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin-top:52px;border-top:1px solid var(--line)}
.stages > div{padding:26px 32px 30px 0;border-bottom:1px solid var(--line)}
.stages > div:nth-child(3n+2),.stages > div:nth-child(3n){border-left:1px solid var(--line);padding-left:32px}
.stages .n{font-family:var(--ff-mono);font-size:11.5px;letter-spacing:.12em;color:var(--label)}
.stages h3{margin-top:12px;font-size:19px}
.stages p{color:var(--ink-2);font-size:15px;line-height:1.65;margin-top:9px}
.agenda{margin-top:clamp(40px,5vw,64px)}
.entry{display:grid;grid-template-columns:5rem minmax(0,1fr);gap:clamp(20px,4vw,44px);padding:clamp(40px,5vw,60px) 0;border-top:1px solid var(--line)}
.entry .mk{font-family:var(--ff-mono);font-size:12.5px;color:var(--label);padding-top:10px}
.entry h2{font-size:clamp(1.6rem,2.7vw,2.2rem)}
.entry .q{font-size:clamp(1.05rem,1.6vw,1.3rem);font-weight:500;line-height:1.5;color:var(--blue);margin-top:16px;max-width:38ch}
.entry .body{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);gap:clamp(28px,4vw,52px);margin-top:26px;align-items:start}
.entry .body p{color:var(--ink-2);font-size:16.5px;line-height:1.72}
.entry .body p+p{margin-top:14px}
.entry dl{margin:0;border-top:1px solid var(--line)}
.entry dt{font-family:var(--ff-mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--label);padding-top:14px}
.entry dd{margin:5px 0 14px;padding-bottom:14px;font-size:15.5px;line-height:1.6;color:var(--ink-2);border-bottom:1px solid var(--line)}
.ledger .r.legacy{grid-template-columns:9rem minmax(0,1fr)}
.bib{margin-top:26px}
.bib .row{display:grid;grid-template-columns:5rem minmax(0,1fr);gap:26px;padding:26px 0;border-top:1px solid var(--line)}
.bib .row:last-child{border-bottom:1px solid var(--line)}
.bib .yr{font-family:var(--ff-mono);font-size:13px;color:var(--label);padding-top:5px}
.bib .t{font-size:18.5px;font-weight:600;letter-spacing:-.022em;line-height:1.36}
.bib .a{font-size:15px;color:var(--ink-2);margin-top:9px}
.bib .v{font-size:15.5px;color:var(--ink-3);margin-top:4px}
.bib .meta{display:flex;flex-wrap:wrap;gap:8px 18px;align-items:baseline;margin-top:12px}
.bib .kind{font-family:var(--ff-mono);font-size:11.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--label)}
.bib .doi{font-family:var(--ff-mono);font-size:12.5px;color:var(--blue);overflow-wrap:anywhere}
.bib .doi:hover{text-decoration:underline}
.person{display:grid;grid-template-columns:minmax(0,.6fr) minmax(0,1.4fr);gap:clamp(32px,6vw,72px);padding:clamp(40px,5vw,60px) 0;border-top:1px solid var(--line)}
.person:first-child{border-top:0;padding-top:0}
.portrait{position:relative;aspect-ratio:4/5;border:1px solid var(--line);background:var(--paper);display:grid;place-items:center;overflow:hidden}
.portrait img{width:100%;height:100%;object-fit:cover}
.portrait .mono{font-weight:600;font-size:clamp(52px,7vw,76px);letter-spacing:-.05em;color:var(--ink);line-height:1;font-family:var(--ff-sans)}
.portrait .plate{position:absolute;left:0;right:0;bottom:0;padding:10px 14px;border-top:1px solid var(--line);font-family:var(--ff-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--label);background:var(--white)}
.person h2{font-size:clamp(1.9rem,3.4vw,2.7rem)}
.person .role{font-size:17px;color:var(--ink);margin-top:14px}
.person .aff{font-size:15.5px;color:var(--ink-2);margin-top:5px;max-width:46ch}
.person .bio{margin-top:26px}
.person .bio p{font-size:17px;line-height:1.72;color:var(--ink-2);max-width:62ch}
.person .bio p+p{margin-top:14px}
.person .field{margin-top:28px;padding-top:20px;border-top:1px solid var(--line)}
.person .field .k{font-family:var(--ff-mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--label)}
.person .interests{font-size:17px;line-height:1.65;color:var(--ink);margin-top:12px;max-width:52ch}
.person .interests i{font-style:normal;color:var(--label);padding:0 6px}
.person .cites{list-style:none;margin:12px 0 0;padding:0;max-width:56ch}
.person .cites li{font-size:15.5px;line-height:1.55;color:var(--ink-2);padding:10px 0;border-bottom:1px solid var(--line)}
.person .cites li:first-child{border-top:1px solid var(--line)}
.person .links{display:flex;flex-wrap:wrap;gap:22px;margin-top:26px}
.person .links a{font-size:15px;font-weight:600;color:var(--blue)}
.contact-details{border-top:1px solid var(--line)}
.contact-details .r{padding:20px 0;border-bottom:1px solid var(--line)}
.contact-details .k{font-family:var(--ff-mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--label)}
.contact-details .m{display:inline-block;margin-top:8px;font-family:var(--ff-mono);font-size:15px;color:var(--blue);overflow-wrap:anywhere}
.strip{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.strip .wrap{display:flex;align-items:baseline;justify-content:space-between;gap:20px 40px;padding-top:24px;padding-bottom:24px;flex-wrap:wrap}
.strip .lead{font-family:var(--ff-mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--label)}
.chips{display:flex;gap:22px;flex-wrap:wrap;font-family:var(--ff-mono);font-size:13px;color:var(--ink-2)}
.chips b{color:var(--ink);font-weight:600}
.figframe{position:relative;border:1px solid var(--line);border-radius:6px;background:var(--white);padding:32px 26px 24px}
.figframe .cap{position:absolute;top:14px;left:26px;font-family:var(--ff-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--label)}
.orch-panel{position:relative;margin-top:44px;height:clamp(440px,60vh,680px);border:1px solid var(--line);border-radius:6px;overflow:hidden;background:var(--white)}
.orch-lede{font-size:17.5px;line-height:1.7;color:var(--ink-2);margin-top:18px;max-width:64ch}
.arch-key{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;margin-top:36px;border-top:1px solid var(--line)}
.arch-key div{padding:24px 28px 0 0}
.arch-key div+div{border-left:1px solid var(--line);padding-left:28px}
.arch-key .k{font-family:var(--ff-mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--label)}
.arch-key h4{margin-top:12px}
.arch-key p{font-size:15px;line-height:1.65;color:var(--ink-2);margin-top:9px}
.section.dark .arch-key,.section.dark .arch-key div+div{border-color:var(--d-line-2)}
.section.dark .arch-key .k{color:var(--cyan-lit)}
.section.dark .arch-key p{color:#E6EDF7}
.section.dark .ledger,.section.dark .ledger .r{border-color:var(--d-line-2)}
.section.dark .ledger .v{color:#E6EDF7}
.section.dark .ledger .k{color:#fff}

/* ---------- 9. responsive ---------- */
@media(max-width:1100px){
  .seq{grid-template-columns:1fr;gap:0}
}
@media(max-width:1040px){
  .grid-2,.grid-aside,.cols,.cols.aside,.cols.figure{grid-template-columns:1fr;gap:32px}
  .ideas,.triad,.arch-key{grid-template-columns:1fr}
  .ideas > div+div,.triad > div+div,.arch-key div+div{border-left:0;border-top:1px solid var(--line);padding-left:0}
  .ideas > div,.triad > div,.arch-key div{padding:22px 0 0}
  .s-void .ideas > div+div{border-color:var(--d-line-2)}
  .stages{grid-template-columns:1fr}
  .stages > div{padding:22px 0 22px!important;border-left:0!important}
  .ent,.entry{grid-template-columns:1fr;gap:10px}
  .ent .body,.entry .body{grid-template-columns:1fr;gap:26px}
  .ent .mk,.entry .mk{padding-top:0}
  .hero-foot{grid-template-columns:1fr;gap:24px;align-items:start}
  .hero-foot .actions{justify-content:flex-start}
  .person{grid-template-columns:1fr;gap:30px}
  .portrait{max-width:280px;aspect-ratio:1/1}
}
@media(max-width:980px){
  .navlinks{position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;padding:8px var(--gutter) 22px;background:var(--white);border-bottom:1px solid var(--line);opacity:0;visibility:hidden;transform:translateY(-8px);pointer-events:none;transition:opacity .18s,transform .18s}
  body.dark-top .navlinks{background:var(--void);border-bottom:1px solid var(--d-line-2)}
  .navlinks a{padding:14px 0;border-bottom:1px solid var(--line);font-size:16.5px}
  body.dark-top .navlinks a{border-bottom-color:var(--d-line-2)}
  .menu-toggle{display:flex}
  header #nav.nav-open .navlinks{opacity:1!important;visibility:visible!important;transform:none!important;pointer-events:auto!important}
}
@media(max-width:860px){
  .statement .sub{grid-template-columns:1fr;gap:16px}
  .foot-top{grid-template-columns:1fr;gap:38px}
  .ledger .r{grid-template-columns:1fr;gap:8px}
  .faq .qa{grid-template-columns:1fr;gap:10px;padding:24px 0}
  .bib .row{grid-template-columns:1fr;gap:8px}
  .bib .yr{padding-top:0}
}
@media(max-width:720px){
  body{font-size:16.5px}
  .hero h1.wordmark{font-size:clamp(3.2rem,17vw,5rem)}
  .graph-legend{gap:8px 16px}
  .graph-legend .keys{gap:10px 14px;font-size:11px}
  .stage{height:min(72vh,520px)}
  .actions .btn{width:100%}
  .closing-row{gap:18px}
  .chips{gap:14px;font-size:12.5px}
}
@media(max-width:699px){
  .hero-graph{aspect-ratio:900/600}
}
@media(max-width:400px){
  .brand .desc{display:none}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}
@media print{
  header,footer,.hero-graph,.stage,.orch-panel{display:none}
  body{background:#fff;color:#000}
}

/* ============================================================
   10. editorial composition system
   One rule throughout: section openings are centered; substantial
   explanation sits in a controlled central column, left-aligned.
   ============================================================ */

/* centered opening: heading + optional short introduction */
.statement .sub.one{display:block}
.statement .sub.one .read{margin-top:0}
.open{max-width:960px;margin:0 auto;text-align:center}
.open h1,.open h2{margin:0 auto;max-width:24ch}
.open h1.tight,.open h2.tight{max-width:19ch}
.open .lede{margin:clamp(20px,2.6vw,28px) auto 0;max-width:60ch}
.open .kicker{margin-bottom:18px}
h1.page{font-size:clamp(2.2rem,4.6vw,3.6rem);letter-spacing:-.038em}
h1.compact{font-size:clamp(2.4rem,4.8vw,3.9rem);letter-spacing:-.04em}

/* controlled central reading column — paragraphs stay left-aligned */
.read{max-width:70ch;margin:clamp(30px,4vw,46px) auto 0;text-align:left}
.read.narrow{max-width:62ch}
.read.wide{max-width:78ch}
.read p{font-size:17.5px;line-height:1.78;color:var(--ink-2);text-wrap:pretty}
.read p+p{margin-top:17px}
.read p strong{font-weight:600;color:var(--ink)}
.read .mono-note{font-family:var(--ff-mono);font-size:13px;letter-spacing:.03em;color:var(--label);margin-top:20px}
.s-void .read p,.s-navy .read p,.s-blue .read p{color:var(--d-body)}
.s-void .read p strong,.s-navy .read p strong,.s-blue .read p strong{color:#fff}
.s-void .read .mono-note,.s-blue .read .mono-note{color:var(--d-faint)}
.read .actions{justify-content:flex-start}
.open .actions{justify-content:center;margin-top:30px}

/* centered figures */
.fig-c{margin-left:auto;margin-right:auto}
figcaption.cap-c{text-align:center;max-width:72ch;margin-left:auto;margin-right:auto}
.rule-c{width:64px;height:1px;background:var(--line-2);margin:clamp(34px,4vw,48px) auto}
.s-void .rule-c,.s-blue .rule-c{background:rgba(255,255,255,.22)}

/* four parallel items, 2×2 */
.quad{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0;margin-top:clamp(40px,5vw,62px);border-top:1px solid var(--line)}
.quad > div{padding:28px 36px 30px 0}
.quad > div:nth-child(2n){border-left:1px solid var(--line);padding-left:36px}
.quad > div:nth-child(n+3){border-top:1px solid var(--line)}
.quad h4{font-size:20px;letter-spacing:-.024em}
.quad p{font-size:16px;line-height:1.74;color:var(--ink-2);margin-top:11px;max-width:48ch;text-wrap:pretty}
.s-void .quad,.s-blue .quad,.s-void .quad > div:nth-child(2n),.s-blue .quad > div:nth-child(2n),
.s-void .quad > div:nth-child(n+3),.s-blue .quad > div:nth-child(n+3){border-color:var(--d-line)}
.s-void .quad h4,.s-blue .quad h4{color:#F3F7FE}
.s-void .quad p,.s-blue .quad p{color:var(--d-body)}
@media(max-width:860px){
  .quad{grid-template-columns:1fr}
  .quad > div{padding:24px 0 26px!important;border-left:0!important}
  .quad > div:nth-child(n+2){border-top:1px solid var(--line)}
  .s-void .quad > div:nth-child(n+2),.s-blue .quad > div:nth-child(n+2){border-color:var(--d-line)}
}

/* technical figures on light grounds (research / platform) */
.tech{margin:clamp(38px,5vw,58px) auto 0}
.tech svg{display:block;width:100%;height:auto}
.tech .h{font-family:var(--ff-mono);font-size:12.5px;font-weight:500;letter-spacing:.16em;fill:var(--label)}
.tech .t{font-family:var(--ff-sans);font-size:19px;font-weight:600;letter-spacing:-.02em;fill:var(--ink)}
.tech .t2{font-family:var(--ff-sans);font-size:16.5px;font-weight:600;letter-spacing:-.018em;fill:var(--ink)}
.tech .s{font-family:var(--ff-sans);font-size:15px;fill:var(--ink-2)}
.tech .m{font-family:var(--ff-mono);font-size:13px;fill:var(--ink-2)}
.tech .band{fill:rgba(21,84,216,.06)}
.tech .lane{fill:var(--paper)}
.tech .hair{stroke:var(--line);stroke-width:1}
.tech .ln{stroke:var(--line-2);stroke-width:1}
.tech .dash{stroke:var(--line-2);stroke-width:1;stroke-dasharray:3 5}
.tech .box{fill:none;stroke:var(--line-2);stroke-width:1}
.tech .core{fill:rgba(21,84,216,.07);stroke:rgba(21,84,216,.45);stroke-width:1.2}
.tech .flow{fill:none;stroke:var(--blue);stroke-width:1.8}
.tech .flow2{fill:none;stroke:var(--cyan);stroke-width:1.8}
.tech .warn{fill:none;stroke:var(--rust);stroke-width:2.2}
.tech .warn-d{fill:none;stroke:var(--rust);stroke-width:1.6;stroke-dasharray:5 4}
.tech .soft{fill:none;stroke:#A8B4C6;stroke-width:1.6}
.tech .nb{fill:var(--blue)}
.tech .nr{fill:var(--rust)}
.tech .nc{fill:var(--cyan)}
.fig-wide{display:block}
.fig-tall{display:none}
@media(max-width:1040px){.fig-wide{display:none}.fig-tall{display:block}}

/* compact vertical alternative to a wide figure */
.tlist{margin:30px auto 0;max-width:70ch;border-top:1px solid var(--line)}
.tlist .r{padding:16px 0;border-bottom:1px solid var(--line)}
.tlist .t{display:block;font-size:17px;font-weight:600;letter-spacing:-.02em;color:var(--ink)}
.tlist .d{font-size:15.5px;line-height:1.68;color:var(--ink-2);margin-top:5px}
.tlist .n{font-family:var(--ff-mono);font-size:12px;letter-spacing:.14em;color:var(--label);display:block;margin-bottom:6px}
.tlist .note{font-size:15px;line-height:1.68;color:var(--ink-2);margin-top:16px}
.s-void .tlist,.s-void .tlist .r{border-color:var(--d-line)}
.s-void .tlist .t{color:#F3F7FE}
.s-void .tlist .d,.s-void .tlist .note{color:var(--d-body)}

/* platform stage — animation-led opening */
.stage-sec{padding:0 0 clamp(56px,7vw,92px)}
.stage-head{padding:clamp(52px,7vw,90px) 0 clamp(26px,3.2vw,38px)}
.stage-head h1{max-width:20ch}

/* a single reading column for editorial entries */
.entries.col{max-width:78ch;margin-left:auto;margin-right:auto}
.entries.col .ent .body{grid-template-columns:minmax(0,1fr)}
.entries.col .ent h3{max-width:28ch}
.tlist.lg{margin-top:clamp(40px,5vw,62px)}
.tlist.lg .r{padding:24px 0 26px}
.tlist.lg .t{font-size:19px;letter-spacing:-.024em}
.tlist.lg .d{font-size:16.5px;line-height:1.75;margin-top:8px}

/* research directions — reading column with full-width figures */
.dirs{margin-top:clamp(40px,5vw,64px)}
.dir{padding:clamp(46px,5.5vw,78px) 0;border-top:1px solid var(--line)}
.dir:last-child{border-bottom:1px solid var(--line)}
.dir-t{max-width:76ch;margin:0 auto}
.dir-t h3{font-size:clamp(1.5rem,2.6vw,2.15rem);letter-spacing:-.03em;max-width:26ch}
.dir-t .q{font-size:clamp(1.08rem,1.55vw,1.32rem);font-weight:400;line-height:1.62;color:var(--ink);margin-top:20px;max-width:56ch;letter-spacing:-.012em}
.dir-t p{font-size:17px;line-height:1.78;color:var(--ink-2);margin-top:17px;text-wrap:pretty}
.dir-t h3,.dir-t .q,.entries.col .ent h3,.entries.col .ent .q{text-align:center;margin-left:auto;margin-right:auto}
.dir .figure{margin-top:clamp(40px,5vw,60px)}
.qa-item{scroll-margin-top:110px}

/* frequently asked questions — expandable question list */
.qa-list{max-width:80ch;margin:clamp(10px,1.6vw,20px) auto 0;border-top:1px solid var(--line)}
.qa-item{border-bottom:1px solid var(--line);scroll-margin-top:110px}
.qa-item > summary{display:grid;grid-template-columns:minmax(0,1fr) 1.4rem;gap:0 24px;align-items:start;padding:23px 0;cursor:pointer;list-style:none}
.qa-item > summary::-webkit-details-marker{display:none}
.qa-item > summary::marker{content:""}
.qa-item > summary:focus-visible{outline:2px solid var(--blue);outline-offset:4px}
.qa-item > summary h2{font-size:clamp(1.12rem,1.75vw,1.45rem);font-weight:600;letter-spacing:-.026em;line-height:1.3;color:var(--ink);max-width:36ch;transition:color .14s}
.qa-item > summary:hover h2,.qa-item[open] > summary h2{color:var(--blue)}
.qa-item > summary h2 .cosimulator,.qa-item > summary h2 .cosimu b{color:inherit}
.qa-item .mk{position:relative;width:15px;height:15px;justify-self:end;margin-top:7px}
.qa-item .mk::before,.qa-item .mk::after{content:"";position:absolute;background:var(--ink-3);transition:transform .2s cubic-bezier(.2,.7,.2,1),background .14s}
.qa-item .mk::before{left:0;top:7px;width:15px;height:1.5px}
.qa-item .mk::after{left:6.75px;top:0;width:1.5px;height:15px}
.qa-item[open] .mk::before,.qa-item[open] .mk::after{background:var(--blue)}
.qa-item[open] .mk::after{transform:scaleY(0)}
.qa-a{padding:2px 0 32px;max-width:68ch}
.qa-a p{font-size:16.5px;line-height:1.78;color:var(--ink-2);text-wrap:pretty}
.qa-a p+p{margin-top:14px}
.qa-a ul{list-style:none;margin:15px 0 0;padding:0;display:grid;gap:2px}
.qa-a li{position:relative;font-size:16px;line-height:1.7;color:var(--ink-2);padding:5px 0 5px 20px}
.qa-a li::before{content:"";position:absolute;left:0;top:17px;width:9px;height:1px;background:var(--blue);opacity:.55}
.qa-a li b{font-weight:600;color:var(--ink)}
.qa-a ul+p{margin-top:15px}
@media(max-width:620px){
  .qa-item > summary{grid-template-columns:minmax(0,1fr) 1.2rem;gap:0 16px}
}