/* PARTICULAR — editorial identity system
   Palette is variable-driven: swap here to try new schemes. */
:root{
  --ivory:#F6F1E7;
  --ivory-deep:#EFE8DA;
  --espresso:#2E1F16;
  --espresso-deep:#241811;
  --stone:#A89F90;
  --stone-line:rgba(46,31,22,.18);
  --stone-line-inv:rgba(246,241,231,.22);
  --blue:#8DA9BE;
  --blue-deep:#7A96AC;
  --serif:'Fraunces',Georgia,serif;
  --text:'Newsreader',Georgia,serif;
  --mono:'IBM Plex Mono',monospace;
  --max:1240px;
}
*{margin:0;padding:0;box-sizing:border-box;caret-color:transparent}
html{scroll-behavior:smooth}
body{background:var(--ivory);color:var(--espresso);font-family:var(--text);font-size:17px;line-height:1.55;-webkit-font-smoothing:antialiased;cursor:default;overflow-x:clip}
a,button{cursor:pointer}

/* type */
h1,h2,h4{font-family:var(--serif);font-weight:560;letter-spacing:-.015em}
h2{font-size:clamp(30px,3.4vw,46px);line-height:1.08;margin:14px 0 20px;font-variation-settings:'opsz' 60}
em{font-style:italic}
.dot{color:var(--blue)}
.label{font-family:var(--mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--blue-deep)}
.sec-dark .label,.sec-accent .label{color:var(--blue)}
.body-sm{font-size:16px;max-width:44ch;color:inherit;opacity:.86;margin-top:6px}
.body-sm.emph{margin-top:22px;opacity:1;font-weight:500}
.body-sm.quiet{opacity:.65;max-width:52ch;margin:26px auto 0;text-align:center;font-size:14.5px}
.center{text-align:center;display:block}

/* nav — hides on scroll down, returns on a solid bar on scroll up */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;justify-content:space-between;align-items:center;
  padding:18px 48px;color:var(--espresso);background:transparent;
  transition:transform .35s ease,background .3s ease,border-color .3s ease}
.nav.scrolled{background:var(--ivory);border-bottom:1px solid var(--stone-line)}
.nav.hide{transform:translateY(-110%)}
.wordmark{font-family:var(--serif);font-weight:600;font-size:13.5px;letter-spacing:.22em;text-decoration:none;color:inherit}
.wordmark.small{font-size:12px}
.nav-links a{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;text-decoration:none;color:inherit;margin-left:34px;opacity:.85}
.nav-links a:hover{opacity:1}

/* hero */
.hero{min-height:100vh;display:grid;grid-template-columns:1.5fr 1fr;gap:60px;align-items:center;
  max-width:var(--max);margin:0 auto;padding:140px 48px 80px}
.kicker{font-family:var(--mono);font-size:11.5px;letter-spacing:.26em;text-transform:uppercase;color:var(--blue-deep);margin-bottom:28px}
.hero h1{font-size:clamp(88px,13.5vw,192px);line-height:.9;font-weight:620;font-variation-settings:'opsz' 144;letter-spacing:-.02em}
.hero-sub{font-family:var(--text);font-style:italic;font-size:clamp(26px,3.4vw,44px);color:var(--blue-deep);margin:10px 0 40px;font-weight:400}
.hero-copy p{max-width:46ch;margin-bottom:16px;opacity:.88}
.hero-dict{border-left:1px solid var(--stone-line);padding-left:44px;align-self:center}
.dict-head{font-family:var(--serif);font-size:34px;font-weight:500}
.dict-phon{font-family:var(--mono);font-size:12.5px;color:var(--stone);margin:6px 0 22px;letter-spacing:.06em}
.dict-defs{list-style:none;counter-reset:def}
.dict-defs li{counter-increment:def;position:relative;padding-left:30px;margin-bottom:16px;font-size:16.5px;line-height:1.5;opacity:.92}
.dict-defs li::before{content:counter(def) '.';position:absolute;left:0;font-family:var(--mono);font-size:13px;color:var(--blue-deep);font-style:italic}

/* links */
.text-link{font-family:var(--mono);font-size:12px;letter-spacing:.2em;text-transform:uppercase;text-decoration:none;
  color:inherit;border-bottom:1px solid currentColor;padding-bottom:4px;display:inline-block;margin-top:12px}
.text-link .arrow{display:inline-block;transition:transform .3s ease}
.text-link:hover .arrow{transform:translateX(6px)}
.text-link.big{font-size:15px;letter-spacing:.14em;text-transform:none;margin-top:20px}

/* sections */
.sec{padding:110px 48px}
.sec-light{background:var(--ivory);color:var(--espresso)}
.sec-dark{background:var(--espresso);color:var(--ivory)}
.sec-accent{background:var(--blue);color:var(--espresso-deep)}
.sec-grid{max-width:var(--max);margin:0 auto;display:grid;gap:64px;align-items:center}
.sec-grid.three{grid-template-columns:1fr 1.7fr 1fr}
.sec-grid.two{grid-template-columns:1.2fr 1fr}
.sec-grid.two-wide{grid-template-columns:1fr 1.4fr}

/* matrix */
.matrix{width:100%}
.matrix .label{margin-bottom:18px}
.matrix-axis-x{display:flex;justify-content:space-between;align-items:center;font-family:var(--mono);font-size:10px;
  letter-spacing:.18em;text-transform:uppercase;opacity:.6;margin:0 0 10px 46px}
.matrix-axis-x .axis-name{letter-spacing:.24em}
.matrix-wrap{display:flex;gap:14px}
.matrix-axis-y{display:flex;flex-direction:column;justify-content:space-between;align-items:center;font-family:var(--mono);
  font-size:10px;letter-spacing:.18em;text-transform:uppercase;opacity:.6;width:32px}
.matrix-axis-y .axis-name{writing-mode:vertical-rl;transform:rotate(180deg);letter-spacing:.24em}
.matrix-grid{display:grid;grid-template-columns:1fr 1fr;flex:1;border:1px solid var(--stone-line-inv)}
.q{padding:24px 20px;border:.5px solid var(--stone-line-inv);min-height:130px}
.q h4{font-size:15.5px;letter-spacing:.02em;margin-bottom:10px;font-weight:600;white-space:nowrap}
.tm{font-size:8px;vertical-align:super;letter-spacing:0;opacity:.65}
.q h4::before{content:'';display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--stone);margin-right:10px;opacity:.7}
.q p{font-size:13.5px;line-height:1.6;opacity:.72}
.q p em{opacity:.9}
.q-hero{background:var(--blue);color:var(--espresso-deep)}
.q-hero h4::before{background:var(--espresso-deep)}
.q-hero p{opacity:.85}

/* cascade — resolves as it scrolls in, unresolves as it scrolls out */
.sec-grid.system-three{grid-template-columns:1fr 1.5fr 1.05fr;align-items:center}
.cascade svg{width:100%;height:auto;display:block}
/* legend entries pinned to their plane's vertical position (plane centers / 580 viewBox) */
.legend{position:relative;align-self:stretch}
.leg{position:absolute;left:0;right:0;transform:translateY(-50%);border-top:1px solid var(--stone-line);padding-top:12px}
.leg-1{top:14.4%}.leg-2{top:36.4%}.leg-3{top:59.2%}.leg-4{top:82.5%}
.leg h5{font-family:var(--mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;font-weight:500;color:var(--blue-deep);margin-bottom:6px}
.leg p{font-size:13.5px;line-height:1.45;opacity:.75}
.couplet{margin-top:38px;font-size:17px;line-height:1.65;font-weight:500;border-top:1px solid var(--stone-line);padding-top:22px}
.couplet em{color:var(--blue-deep);font-family:var(--text);font-weight:500}
.planes polygon{fill:none;stroke:var(--stone-line);stroke-width:1}
.links line{stroke:var(--stone);stroke-width:.8;opacity:.5}
.nodes circle{fill:var(--espresso)}
.nodes .n-root{fill:var(--blue-deep)}
.plane-label,.node-label{font-family:var(--mono);fill:var(--stone);letter-spacing:.18em}
.plane-label{font-size:10.5px}
.node-label{font-size:8.5px;text-anchor:middle;letter-spacing:.14em}
.center-anchor{text-anchor:middle}

/* process */
.process-head{max-width:var(--max);margin:0 auto 64px}
.process{max-width:var(--max);margin:0 auto;display:grid;grid-template-columns:repeat(5,1fr);gap:36px;list-style:none}
.process li{border-top:1px solid var(--stone-line-inv);padding-top:22px}
.p-num{font-family:var(--serif);font-style:italic;font-size:34px;color:var(--blue);display:block;margin-bottom:14px;font-weight:400}
.process h4{font-family:var(--mono);font-size:12px;letter-spacing:.22em;text-transform:uppercase;font-weight:500;margin-bottom:10px}
.process p{font-size:14px;opacity:.72;line-height:1.5}

/* paper object — flat, printed-document treatment */
.paper-object{display:flex;justify-content:center}
.paper-cover{width:300px;height:400px;background:var(--espresso);color:var(--ivory);padding:38px 32px;
  display:flex;flex-direction:column;box-shadow:16px 16px 0 var(--stone-line)}
.paper-title{font-family:var(--serif);font-size:21px;line-height:1.25;font-weight:600;letter-spacing:.01em}
.paper-sub{font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;opacity:.6;margin-top:18px}
.paper-brand{margin-top:auto;font-family:var(--serif);font-size:12px;letter-spacing:.24em}

/* engagement */
.engage{max-width:var(--max);margin:0 auto}
.engage h2{max-width:16ch}
.triggers{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin:48px 0 6px}
.triggers li{border-top:1px solid rgba(36,24,17,.35);padding-top:18px;font-size:15.5px;line-height:1.4;font-weight:500}

/* closing */
.closing{padding:140px 48px}
.closing-inner{max-width:var(--max);margin:0 auto}
.closing h2{font-size:clamp(34px,4.2vw,54px)}
.closing .body-sm{max-width:48ch}

/* footer */
.footer{background:var(--espresso-deep);color:var(--ivory);display:flex;justify-content:space-between;align-items:center;
  padding:26px 48px;font-size:12px}
.footer-links a{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:inherit;
  text-decoration:none;margin-right:26px;opacity:.7}
.footer-links a:hover{opacity:1}
.fineprint{font-family:var(--mono);font-size:10px;opacity:.5;letter-spacing:.08em}

/* reveal animation */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .9s ease,transform .9s ease}
.reveal.in{opacity:1;transform:none}
.delay-1{transition-delay:.12s}
.delay-2{transition-delay:.24s}
.delay-3{transition-delay:.36s}

/* responsive */
@media(max-width:1000px){
  .hero{grid-template-columns:1fr;padding:110px 24px 60px;gap:36px}
  .hero h1{font-size:clamp(58px,17vw,110px)}
  .hero-sub{font-size:clamp(22px,6.5vw,34px)}
  .hero-dict{border-left:none;border-top:1px solid var(--stone-line);padding:36px 0 0}
  .sec-grid.three{grid-template-columns:1fr}
  .sec-grid.two,.sec-grid.two-wide{grid-template-columns:1fr}
  .sec-grid.system-three{grid-template-columns:1fr}
  .legend{position:static}
  .leg{position:static;transform:none;margin-bottom:18px}
  .process{grid-template-columns:1fr 1fr}
  .triggers{grid-template-columns:1fr 1fr}
  .nav{padding:16px 24px}
  .sec{padding:80px 24px}
  .footer{flex-direction:column;gap:14px}
  .footer-links{display:flex;flex-wrap:wrap;justify-content:center}
  .footer-links a{margin:0 9px 6px}
}
/* small screens: matrix cells may wrap, stay inside viewport */
@media(max-width:700px){
  .q h4{white-space:normal;font-size:13.5px}
  .q{min-height:0;padding:13px 11px}
  .q p{font-size:11.5px}
  .matrix-axis-x{margin-left:36px}
  .matrix-wrap{gap:8px}
  .matrix-axis-y{width:22px}
}

/* situations — evidence section, ivory-deep field */
.sec-mid{background:var(--ivory-deep);color:var(--espresso)}
.situations-inner{max-width:var(--max);margin:0 auto}
.sit-head{margin-bottom:54px}
.disclosure{font-size:14px;opacity:.6;margin-top:4px}
.sit-grid{display:grid;grid-template-columns:repeat(3,1fr);column-gap:56px;margin-bottom:44px}
.sit{display:grid;grid-template-rows:subgrid;grid-row:span 6}
.sit-num{font-family:var(--serif);font-style:italic;font-size:28px;color:var(--blue-deep);font-weight:400}
.sit h3{font-family:var(--serif);font-size:20px;font-weight:600;letter-spacing:-.01em;margin:6px 0 22px}
.beat{border-top:1px solid var(--stone-line);padding:13px 0 15px}
.beat h6{font-family:var(--mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;font-weight:500;color:var(--stone);margin-bottom:8px}
.beat p{font-size:14.5px;line-height:1.5;opacity:.85}
.beat .dec{font-family:var(--serif);font-size:16.5px;font-weight:600;opacity:1}
.dmark{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--blue-deep);margin-right:8px;vertical-align:1px}
.beat .moves{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--stone);opacity:1;display:flex;flex-wrap:wrap;column-gap:9px;row-gap:5px}
.beat .moves span{white-space:nowrap}
.beat .moves span:not(:last-child)::after{content:'·';margin-left:9px;opacity:.7}
@media(max-width:1000px){.sit-grid{grid-template-columns:1fr;gap:40px}}

/* mobile nav: wordmark only (full nav lives in the footer) */
@media(max-width:860px){
  .nav-links{display:none}
  .nav{padding:14px 20px}
  .wordmark{font-size:12px;letter-spacing:.18em}
}