/* ============================================================
   TGRZ SPACE — Design System
   Concept: "The Space Stack" — architectural / blueprint editorial
   Palette: ink charcoal · concrete plaster · burnished brass · ember
   Type:    Pretendard (KR/body) · Space Grotesk (display) · Space Mono (annotation)
   ============================================================ */

/* ---------- Tokens ---------- */
:root{
  /* dark ink family */
  --void:#0b0c0e;
  --ink:#121316;
  --ink-2:#1a1c20;
  --ink-3:#23262c;
  --ink-line:rgba(245,243,238,.12);
  --ink-line-2:rgba(245,243,238,.22);

  /* light concrete family */
  --paper:#f3f1ea;
  --plaster:#e7e4db;
  --concrete:#d6d2c7;
  --concrete-line:rgba(18,19,22,.14);
  --concrete-line-2:rgba(18,19,22,.26);

  /* text */
  --on-dark:#f5f3ee;
  --on-dark-mut:#9c9ea4;
  --on-dark-dim:#6b6d73;
  --on-light:#191a1d;
  --on-light-mut:#5c5850;
  --on-light-dim:#8a857a;

  /* accents */
  --brass:#c6963f;        /* premium / value / money */
  --brass-bright:#e0b968;
  --brass-deep:#9c7328;
  --ember:#de5b3b;        /* fire / urgency / energy — used sparingly */
  --ember-soft:#e8795c;

  /* type */
  --f-disp:"Space Grotesk","Pretendard",sans-serif;
  --f-sans:"Pretendard","Space Grotesk",system-ui,sans-serif;
  --f-mono:"Space Mono","JetBrains Mono",ui-monospace,monospace;

  /* metrics */
  --rail:56px;                 /* left measurement rail width (desktop) */
  --maxw:1240px;
  --pad:clamp(20px,5vw,64px);
  --r:3px;                     /* base radius — sharp, architectural */

  --ease:cubic-bezier(.4,.01,.16,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
*{margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  font-family:var(--f-sans);
  background:var(--ink);
  color:var(--on-dark);
  line-height:1.6;
  font-weight:400;
  letter-spacing:-.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
ul{list-style:none}
::selection{background:var(--brass);color:var(--ink)}

/* ---------- Type scale ---------- */
.display{
  font-family:var(--f-sans);
  font-weight:800;
  line-height:1.02;
  letter-spacing:-.035em;
  font-size:clamp(2.6rem,7.4vw,6.2rem);
}
.h1{font-family:var(--f-sans);font-weight:800;line-height:1.06;letter-spacing:-.03em;font-size:clamp(2rem,4.6vw,3.6rem)}
.h2{font-family:var(--f-sans);font-weight:800;line-height:1.1;letter-spacing:-.025em;font-size:clamp(1.6rem,3.4vw,2.6rem)}
.h3{font-family:var(--f-sans);font-weight:700;line-height:1.2;letter-spacing:-.02em;font-size:clamp(1.2rem,2vw,1.5rem)}
.lead{font-size:clamp(1.05rem,1.55vw,1.32rem);line-height:1.65;font-weight:400;letter-spacing:-.012em}
.big-num{font-family:var(--f-disp);font-weight:700;line-height:.92;letter-spacing:-.04em;font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}

/* eyebrow / label / mono annotation */
.eyebrow{
  font-family:var(--f-mono);
  font-size:.72rem;
  font-weight:700;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--brass);
  display:inline-flex;align-items:center;gap:.6em;
}
.eyebrow::before{
  content:"";width:26px;height:1px;background:currentColor;display:inline-block;opacity:.7;
}
.eyebrow.no-rule::before{display:none}
.mono{font-family:var(--f-mono);font-size:.75rem;letter-spacing:.06em}
.tag{
  font-family:var(--f-mono);font-size:.66rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  padding:.42em .7em;border:1px solid var(--ink-line-2);border-radius:100px;color:var(--on-dark-mut);
  display:inline-block;white-space:nowrap;
}

/* ---------- Trigram mark (☲ 離) ---------- */
.trigram{display:inline-flex;flex-direction:column;gap:3px;width:1.15em;vertical-align:middle}
.trigram i{display:block;height:2px;background:currentColor;border-radius:2px;position:relative}
.trigram i:nth-child(2){background:transparent}
.trigram i:nth-child(2)::before,.trigram i:nth-child(2)::after{
  content:"";position:absolute;top:0;height:2px;width:42%;background:currentColor;border-radius:2px;
}
.trigram i:nth-child(2)::before{left:0}
.trigram i:nth-child(2)::after{right:0}

/* ---------- Layout ---------- */
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad);width:100%}
.section{position:relative;padding-block:clamp(64px,9vw,128px)}
.section--tight{padding-block:clamp(48px,6vw,84px)}

/* light / dark section skins */
.skin-ink{background:var(--ink);color:var(--on-dark)}
.skin-void{background:var(--void);color:var(--on-dark)}
.skin-plaster{background:var(--plaster);color:var(--on-light)}
.skin-paper{background:var(--paper);color:var(--on-light)}
.skin-plaster .eyebrow,.skin-paper .eyebrow{color:var(--brass-deep)}
.skin-plaster .lead,.skin-paper .lead{color:var(--on-light-mut)}

/* measurement rail: a hairline + ticks on the far left, evoking a dimension line */
.railed{position:relative}
.railed::before{
  content:"";position:absolute;left:calc(var(--pad) - 1px);top:0;bottom:0;width:1px;
  background:var(--ink-line);pointer-events:none;
}
.skin-plaster.railed::before,.skin-paper.railed::before{background:var(--concrete-line)}
@media (max-width:720px){.railed::before{display:none}}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.6em;
  font-family:var(--f-sans);font-weight:600;font-size:.95rem;letter-spacing:-.01em;
  padding:.92em 1.5em;border-radius:100px;border:1px solid transparent;
  transition:transform .35s var(--ease-out),background .3s var(--ease),color .3s var(--ease),border-color .3s var(--ease);
  will-change:transform;line-height:1;
}
.btn .arw{transition:transform .35s var(--ease-out)}
.btn:hover .arw{transform:translateX(4px)}
.btn-primary{background:var(--brass);color:#1a1408;border-color:var(--brass)}
.btn-primary:hover{background:var(--brass-bright);border-color:var(--brass-bright)}
.btn-ghost{border-color:var(--ink-line-2);color:var(--on-dark)}
.btn-ghost:hover{border-color:var(--on-dark);background:rgba(245,243,238,.05)}
.skin-plaster .btn-ghost,.skin-paper .btn-ghost{border-color:var(--concrete-line-2);color:var(--on-light)}
.skin-plaster .btn-ghost:hover,.skin-paper .btn-ghost:hover{border-color:var(--on-light);background:rgba(18,19,22,.04)}
.btn-lg{padding:1.08em 1.8em;font-size:1rem}

.link-arrow{
  display:inline-flex;align-items:center;gap:.5em;font-weight:600;font-size:.95rem;color:var(--brass);
  border-bottom:1px solid transparent;padding-bottom:2px;transition:gap .3s var(--ease-out),border-color .3s;
}
.link-arrow:hover{gap:.85em;border-color:var(--brass)}
.skin-plaster .link-arrow,.skin-paper .link-arrow{color:var(--brass-deep)}

/* ---------- Header / Nav ---------- */
.site-head{
  position:fixed;inset:0 0 auto 0;z-index:120;
  background:rgba(11,12,14,.72);backdrop-filter:blur(14px) saturate(1.2);
  border-bottom:1px solid var(--ink-line);
  transition:background .4s var(--ease),border-color .4s;
}
.site-head.at-top{background:rgba(11,12,14,0);border-color:transparent}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px;gap:20px}
.brand{display:inline-flex;align-items:center;gap:.6em;font-family:var(--f-disp);font-weight:700;letter-spacing:.01em;font-size:1.02rem}
.brand .trigram{color:var(--brass);width:.9em}
.brand b{font-weight:700}
.brand .sub{font-family:var(--f-mono);font-size:.6rem;letter-spacing:.24em;color:var(--on-dark-mut);text-transform:uppercase;font-weight:700;margin-left:.1em}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{
  font-size:.86rem;font-weight:500;letter-spacing:-.005em;color:var(--on-dark-mut);
  padding:.55em .78em;border-radius:100px;transition:color .25s,background .25s;position:relative;
}
.nav-links a:hover{color:var(--on-dark)}
.nav-links a.active{color:var(--on-dark)}
.nav-links a.active::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:2px;width:4px;height:4px;border-radius:50%;background:var(--brass);
}
.nav-cta{display:flex;align-items:center;gap:10px}
.nav-cta .btn{padding:.62em 1.1em;font-size:.85rem}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--ink-line-2);border-radius:10px;align-items:center;justify-content:center;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--on-dark);border-radius:2px;transition:transform .35s var(--ease),opacity .25s}
.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-open .nav-toggle span:nth-child(2){opacity:0}
.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* mobile menu panel */
.mobile-menu{
  position:fixed;inset:66px 0 0 0;z-index:110;background:var(--void);
  transform:translateY(-8px);opacity:0;pointer-events:none;transition:opacity .3s var(--ease),transform .35s var(--ease-out);
  display:flex;flex-direction:column;padding:24px var(--pad) 40px;overflow-y:auto;
}
.nav-open .mobile-menu{opacity:1;transform:none;pointer-events:auto}
.mobile-menu a{
  display:flex;align-items:baseline;justify-content:space-between;gap:12px;
  padding:18px 0;border-bottom:1px solid var(--ink-line);font-size:1.4rem;font-weight:700;letter-spacing:-.02em;
}
.mobile-menu a .idx{font-family:var(--f-mono);font-size:.7rem;letter-spacing:.1em;color:var(--brass);font-weight:700}
.mobile-menu .m-cta{margin-top:26px;display:flex;flex-direction:column;gap:12px}
.mobile-menu .m-cta .btn{justify-content:center;padding:1.05em}

/* ---------- Hero ---------- */
.hero{
  position:relative;background:var(--void);color:var(--on-dark);
  padding-top:clamp(120px,17vh,180px);padding-bottom:clamp(64px,9vw,110px);overflow:hidden;
}
.hero-grid{
  position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(var(--ink-line) 1px,transparent 1px),linear-gradient(90deg,var(--ink-line) 1px,transparent 1px);
  background-size:64px 64px;mask-image:radial-gradient(120% 90% at 78% 12%,#000 20%,transparent 72%);
  -webkit-mask-image:radial-gradient(120% 90% at 78% 12%,#000 20%,transparent 72%);
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,5vw,68px);align-items:center}
.hero-copy{max-width:640px}
.hero .display{margin:.32em 0 .5em}
.hero .display .fx{color:var(--brass);position:relative;white-space:nowrap}
.hero-sub{color:var(--on-dark-mut);font-size:clamp(1.02rem,1.5vw,1.28rem);max-width:34em;line-height:1.62}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
.hero-metrics{display:flex;flex-wrap:wrap;gap:26px 40px;margin-top:44px;padding-top:30px;border-top:1px solid var(--ink-line)}
.hero-metric .big-num{font-size:clamp(1.9rem,3.2vw,2.6rem);color:var(--on-dark)}
.hero-metric .big-num small{font-size:.44em;color:var(--brass);font-weight:700;margin-left:.15em;letter-spacing:0}
.hero-metric p{font-size:.82rem;color:var(--on-dark-mut);margin-top:6px;letter-spacing:0}

/* ---------- Floor stack (signature) ---------- */
.stack{position:relative;width:100%;max-width:440px;margin-inline:auto}
.stack-frame{position:relative;padding:14px}
.stack-frame::before,.stack-frame::after{
  content:"";position:absolute;width:14px;height:14px;border:1px solid var(--brass);opacity:.55;
}
.stack-frame::before{left:0;top:0;border-right:0;border-bottom:0}
.stack-frame::after{right:0;bottom:0;border-left:0;border-top:0}
.floors{display:flex;flex-direction:column;gap:8px}
.floor{
  position:relative;border:1px solid var(--ink-line-2);border-radius:var(--r);
  padding:14px 16px;min-height:62px;display:flex;align-items:center;justify-content:space-between;gap:12px;
  background:linear-gradient(90deg,rgba(198,150,63,.0),rgba(198,150,63,.0));
  overflow:hidden;transition:border-color .5s var(--ease),background .6s var(--ease);
}
.floor .f-fill{position:absolute;inset:0;background:linear-gradient(100deg,rgba(198,150,63,.16),rgba(198,150,63,.04));transform:scaleX(0);transform-origin:left;transition:transform .7s var(--ease-out)}
.floor .f-body{position:relative;z-index:1}
.floor .f-lvl{font-family:var(--f-mono);font-size:.62rem;font-weight:700;letter-spacing:.16em;color:var(--on-dark-dim);text-transform:uppercase}
.floor .f-name{font-weight:700;font-size:.98rem;letter-spacing:-.01em;color:var(--on-dark);margin-top:3px;transition:color .5s}
.floor .f-state{position:relative;z-index:1;font-family:var(--f-mono);font-size:.6rem;font-weight:700;letter-spacing:.14em;color:var(--on-dark-dim);text-transform:uppercase;text-align:right;transition:color .5s,opacity .4s}
.floor .f-state.vacant{color:var(--on-dark-dim)}
/* occupied state */
.floor.occ{border-color:rgba(198,150,63,.4)}
.floor.occ .f-fill{transform:scaleX(1)}
.floor.occ .f-lvl{color:var(--brass)}
.floor.occ .f-state{color:var(--brass)}
.stack-base{
  margin-top:8px;border:1px solid var(--ink-line-2);border-radius:var(--r);padding:11px 16px;
  display:flex;align-items:center;justify-content:space-between;gap:10px;background:rgba(245,243,238,.02);
}
.stack-base .mono{color:var(--on-dark-mut)}
.stack-base .val{font-family:var(--f-disp);font-weight:700;color:var(--brass);letter-spacing:-.02em}
.stack-cap{margin-top:14px;text-align:center;font-family:var(--f-mono);font-size:.64rem;letter-spacing:.14em;color:var(--on-dark-dim);text-transform:uppercase}

/* ---------- Generic section header ---------- */
.sec-head{max-width:760px;margin-bottom:clamp(38px,5vw,60px)}
.sec-head .h2{margin-top:.5em}
.sec-head .lead{margin-top:1em}
.sec-head.center{margin-inline:auto;text-align:center}
.sec-head.center .eyebrow{justify-content:center}

/* ---------- Cards ---------- */
.grid{display:grid;gap:clamp(14px,1.6vw,20px)}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}

.card{
  position:relative;border:1px solid var(--ink-line);border-radius:var(--r);padding:26px;
  background:var(--ink-2);transition:border-color .4s var(--ease),transform .4s var(--ease-out),background .4s;
  overflow:hidden;
}
.card:hover{border-color:var(--ink-line-2);transform:translateY(-3px)}
.skin-plaster .card,.skin-paper .card{background:#fff;border-color:var(--concrete-line)}
.skin-plaster .card:hover,.skin-paper .card:hover{border-color:var(--concrete-line-2)}
.card .c-idx{font-family:var(--f-mono);font-size:.68rem;font-weight:700;letter-spacing:.16em;color:var(--brass)}
.card .c-title{font-weight:700;font-size:1.12rem;letter-spacing:-.02em;margin:14px 0 8px}
.card p{color:var(--on-dark-mut);font-size:.95rem;line-height:1.6}
.skin-plaster .card p,.skin-paper .card p{color:var(--on-light-mut)}
.card .c-ico{width:40px;height:40px;border:1px solid var(--ink-line-2);border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--brass);margin-bottom:16px}
.skin-plaster .card .c-ico,.skin-paper .card .c-ico{border-color:var(--concrete-line-2)}

/* feature card with top rule accent */
.card--top::before{content:"";position:absolute;left:0;top:0;height:2px;width:0;background:var(--brass);transition:width .5s var(--ease-out)}
.card--top:hover::before{width:100%}

/* ---------- Stat blocks ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--ink-line);border:1px solid var(--ink-line);border-radius:var(--r);overflow:hidden}
.skin-plaster .stats,.skin-paper .stats{background:var(--concrete-line);border-color:var(--concrete-line)}
.stat{background:var(--ink);padding:28px 24px}
.skin-plaster .stat,.skin-paper .stat{background:var(--paper)}
.stat .big-num{font-size:clamp(2rem,3.6vw,2.9rem)}
.stat .big-num small{font-size:.4em;color:var(--brass);font-weight:700;margin-left:.12em;letter-spacing:0}
.stat p{margin-top:8px;font-size:.85rem;color:var(--on-dark-mut);letter-spacing:0}
.skin-plaster .stat p,.skin-paper .stat p{color:var(--on-light-mut)}
.stat .src{margin-top:6px;font-family:var(--f-mono);font-size:.62rem;letter-spacing:.06em;color:var(--on-dark-dim)}

/* ---------- Split / before-after ---------- */
.ba{display:grid;grid-template-columns:1fr auto 1fr;gap:clamp(16px,2.4vw,32px);align-items:stretch}
.ba-col{border:1px solid var(--ink-line);border-radius:var(--r);padding:28px}
.ba-col.before{background:var(--ink-2)}
.ba-col.after{background:linear-gradient(180deg,rgba(198,150,63,.08),rgba(198,150,63,.02));border-color:rgba(198,150,63,.3)}
.ba-col h4{font-family:var(--f-mono);font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;color:var(--on-dark-dim);margin-bottom:18px}
.ba-col.after h4{color:var(--brass)}
.ba-col ul{display:flex;flex-direction:column;gap:14px}
.ba-col li{display:flex;gap:12px;font-size:.98rem;line-height:1.45;color:var(--on-dark-mut)}
.ba-col.after li{color:var(--on-dark)}
.ba-col li .mk{flex:none;width:18px;height:18px;margin-top:2px;color:var(--on-dark-dim)}
.ba-col.after li .mk{color:var(--brass)}
.ba-arrow{display:flex;align-items:center;justify-content:center;color:var(--brass)}
.ba-arrow svg{width:34px;height:34px}
@media (max-width:840px){.ba{grid-template-columns:1fr}.ba-arrow{transform:rotate(90deg);padding:4px 0}}

/* ---------- Process / timeline ---------- */
.steps{position:relative;display:flex;flex-direction:column;gap:2px}
.step{
  display:grid;grid-template-columns:auto 1fr;gap:clamp(18px,3vw,44px);align-items:start;
  padding:clamp(22px,3vw,34px) 0;border-top:1px solid var(--ink-line);
  transition:background .4s;
}
.step:hover{background:linear-gradient(90deg,rgba(198,150,63,.05),transparent 60%)}
.step:last-child{border-bottom:1px solid var(--ink-line)}
.step .s-no{font-family:var(--f-disp);font-weight:700;font-size:clamp(1.4rem,2.6vw,2.1rem);color:var(--brass);letter-spacing:-.04em;font-variant-numeric:tabular-nums;line-height:1;min-width:2.2ch}
.step .s-body{max-width:60ch}
.step .s-title{font-weight:700;font-size:clamp(1.1rem,1.7vw,1.35rem);letter-spacing:-.02em}
.step .s-desc{color:var(--on-dark-mut);margin-top:8px;font-size:.98rem;line-height:1.6}
.skin-plaster .step .s-desc,.skin-paper .step .s-desc{color:var(--on-light-mut)}

/* ---------- Layer list (6 layers) ---------- */
.layers{display:flex;flex-direction:column;border:1px solid var(--ink-line);border-radius:var(--r);overflow:hidden}
.layer{display:grid;grid-template-columns:auto 200px 1fr;gap:clamp(14px,2.4vw,34px);align-items:center;padding:clamp(20px,2.6vw,30px) clamp(20px,2.6vw,32px);border-top:1px solid var(--ink-line);transition:background .35s}
.layer:first-child{border-top:0}
.layer:hover{background:rgba(198,150,63,.04)}
.layer .l-no{font-family:var(--f-mono);font-size:.72rem;font-weight:700;letter-spacing:.14em;color:var(--brass)}
.layer .l-name{font-weight:700;font-size:1.12rem;letter-spacing:-.02em}
.layer .l-desc{color:var(--on-dark-mut);font-size:.95rem;line-height:1.55}
.skin-plaster .layer .l-desc,.skin-paper .layer .l-desc{color:var(--on-light-mut)}
@media (max-width:820px){.layer{grid-template-columns:auto 1fr}.layer .l-desc{grid-column:1/-1}}

/* ---------- Data table ---------- */
.table-wrap{border:1px solid var(--ink-line);border-radius:var(--r);overflow:hidden;overflow-x:auto}
table.data{width:100%;border-collapse:collapse;min-width:640px}
table.data th,table.data td{text-align:left;padding:16px 20px;border-bottom:1px solid var(--ink-line);vertical-align:top;font-size:.93rem;line-height:1.5}
table.data thead th{font-family:var(--f-mono);font-size:.68rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--brass);background:var(--ink-2)}
.skin-plaster table.data thead th,.skin-paper table.data thead th{background:#fff}
table.data tbody tr:last-child td{border-bottom:0}
table.data td:first-child{font-weight:600;color:var(--on-dark)}
.skin-plaster table.data td:first-child,.skin-paper table.data td:first-child{color:var(--on-light)}
table.data td{color:var(--on-dark-mut)}
.skin-plaster table.data td,.skin-paper table.data td{color:var(--on-light-mut)}
table.data .hl{color:var(--brass);font-weight:600}
table.data tr.emph td{background:linear-gradient(90deg,rgba(198,150,63,.06),transparent)}

/* ---------- Callout / quote ---------- */
.callout{
  position:relative;border:1px solid var(--ink-line);border-left:2px solid var(--brass);
  border-radius:var(--r);padding:clamp(26px,3.4vw,40px);background:var(--ink-2);
}
.callout .q{font-size:clamp(1.3rem,2.6vw,2rem);font-weight:700;letter-spacing:-.025em;line-height:1.28}
.callout .q em{color:var(--brass);font-style:normal}
.callout .attr{margin-top:18px;font-family:var(--f-mono);font-size:.72rem;letter-spacing:.1em;color:var(--on-dark-mut);text-transform:uppercase}

/* crisis / risk emphasis (ember) */
.skin-crisis{background:#141013;color:var(--on-dark);position:relative}
.skin-crisis .eyebrow{color:var(--ember)}
.risk-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--ink-line);border:1px solid var(--ink-line);border-radius:var(--r);overflow:hidden}
.risk{background:#171215;padding:28px 26px;position:relative}
.risk .r-k{font-family:var(--f-mono);font-size:.66rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--ember);display:flex;align-items:center;gap:8px}
.risk .r-t{font-weight:700;font-size:1.12rem;letter-spacing:-.02em;margin:12px 0 8px}
.risk p{color:var(--on-dark-mut);font-size:.94rem;line-height:1.55}
.risk .r-x{position:absolute;top:24px;right:24px;color:rgba(222,91,59,.5)}

/* ---------- Logo / partner strip ---------- */
.strip{display:flex;flex-wrap:wrap;align-items:center;gap:14px}
.pill{
  font-family:var(--f-mono);font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  border:1px solid var(--ink-line-2);border-radius:100px;padding:.6em 1.05em;color:var(--on-dark-mut);
}
.skin-plaster .pill,.skin-paper .pill{border-color:var(--concrete-line-2);color:var(--on-light-mut)}

/* ---------- Model structures (3 types) ---------- */
.models3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.model{border:1px solid var(--ink-line);border-radius:var(--r);padding:28px;background:var(--ink-2);display:flex;flex-direction:column}
.model.feat{border-color:rgba(198,150,63,.4);background:linear-gradient(180deg,rgba(198,150,63,.08),rgba(26,28,32,.4))}
.model .m-tag{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--on-dark-dim)}
.model.feat .m-tag{color:var(--brass)}
.model .m-name{font-weight:800;font-size:1.4rem;letter-spacing:-.03em;margin:10px 0 4px}
.model .m-for{font-size:.88rem;color:var(--on-dark-mut);margin-bottom:20px}
.model .m-bars{display:flex;gap:6px;margin-bottom:20px}
.model .m-bars i{height:5px;flex:1;border-radius:3px;background:var(--ink-3)}
.model .m-bars i.on{background:var(--brass)}
.model ul{display:flex;flex-direction:column;gap:11px;margin-top:auto}
.model li{display:flex;gap:10px;font-size:.92rem;color:var(--on-dark-mut);line-height:1.45}
.model li .mk{flex:none;color:var(--brass);margin-top:3px}

/* ---------- Reference blocks ---------- */
.ref{border:1px solid var(--ink-line);border-radius:var(--r);overflow:hidden;background:var(--ink-2)}
.ref-head{padding:26px 28px;border-bottom:1px solid var(--ink-line);display:flex;align-items:flex-start;justify-content:space-between;gap:16px;flex-wrap:wrap}
.ref-head .r-cat{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--brass)}
.ref-head .r-name{font-weight:800;font-size:clamp(1.3rem,2.2vw,1.75rem);letter-spacing:-.03em;margin-top:10px}
.ref-body{padding:26px 28px;display:grid;grid-template-columns:1.3fr 1fr;gap:28px}
.ref-body p{color:var(--on-dark-mut);line-height:1.62;font-size:.97rem}
.ref-metrics{display:flex;flex-direction:column;gap:16px;border-left:1px solid var(--ink-line);padding-left:26px}
.ref-metrics .rm .big-num{font-size:1.8rem}
.ref-metrics .rm .big-num small{font-size:.42em;color:var(--brass);margin-left:.15em;letter-spacing:0;font-weight:700}
.ref-metrics .rm p{font-size:.78rem;color:var(--on-dark-mut);margin-top:2px;letter-spacing:0}
@media (max-width:760px){.ref-body{grid-template-columns:1fr}.ref-metrics{border-left:0;border-top:1px solid var(--ink-line);padding-left:0;padding-top:22px}}

/* case study card */
.case{border:1px solid var(--ink-line);border-radius:var(--r);padding:28px;background:var(--ink-2);height:100%;display:flex;flex-direction:column}
.case .cs-loc{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--brass)}
.case .cs-name{font-weight:800;font-size:1.35rem;letter-spacing:-.03em;margin:10px 0 4px}
.case .cs-tag{font-size:.85rem;color:var(--on-dark-mut);margin-bottom:16px}
.case p{color:var(--on-dark-mut);font-size:.93rem;line-height:1.6}
.case .cs-take{margin-top:18px;padding-top:18px;border-top:1px solid var(--ink-line);font-size:.9rem;color:var(--on-dark)}
.case .cs-take b{color:var(--brass);font-weight:700}

/* ---------- Space model cards ---------- */
.spaces{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.space{position:relative;border:1px solid var(--ink-line);border-radius:var(--r);padding:26px;background:var(--ink-2);overflow:hidden;transition:border-color .4s,transform .4s var(--ease-out)}
.space:hover{border-color:rgba(198,150,63,.35);transform:translateY(-3px)}
.space .sp-no{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.14em;color:var(--on-dark-dim)}
.space .sp-name{font-family:var(--f-disp);font-weight:700;font-size:1.35rem;letter-spacing:-.02em;margin:8px 0 10px;color:var(--on-dark)}
.space .sp-name b{color:var(--brass)}
.space p{color:var(--on-dark-mut);font-size:.92rem;line-height:1.55}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--ink-line)}
.faq details{border-bottom:1px solid var(--ink-line)}
.faq summary{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:24px 0;cursor:pointer;list-style:none;font-weight:700;font-size:1.08rem;letter-spacing:-.02em}
.faq summary::-webkit-details-marker{display:none}
.faq summary .qmk{flex:none;width:22px;height:22px;position:relative;color:var(--brass)}
.faq summary .qmk::before,.faq summary .qmk::after{content:"";position:absolute;background:currentColor;border-radius:2px;transition:transform .3s var(--ease)}
.faq summary .qmk::before{top:10px;left:2px;right:2px;height:2px}
.faq summary .qmk::after{left:10px;top:2px;bottom:2px;width:2px}
.faq details[open] summary .qmk::after{transform:scaleY(0)}
.faq details .a{padding:0 0 26px;color:var(--on-dark-mut);line-height:1.65;max-width:70ch;font-size:.98rem}
.skin-plaster .faq .a,.skin-paper .faq .a{color:var(--on-light-mut)}

/* ---------- Checklist ---------- */
.checklist{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.check{display:flex;gap:14px;align-items:flex-start;border:1px solid var(--ink-line);border-radius:var(--r);padding:20px 22px;background:var(--ink-2)}
.check .ck{flex:none;width:26px;height:26px;border-radius:6px;background:rgba(198,150,63,.12);color:var(--brass);display:flex;align-items:center;justify-content:center;margin-top:1px}
.check p{font-size:.95rem;color:var(--on-dark);line-height:1.5}
.check p small{display:block;color:var(--on-dark-mut);font-size:.85rem;margin-top:3px}

/* ---------- Contact form ---------- */
.form-card{border:1px solid var(--ink-line);border-radius:var(--r);padding:clamp(26px,3.4vw,42px);background:var(--ink-2)}
.field{margin-bottom:20px}
.field label{display:block;font-family:var(--f-mono);font-size:.68rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--on-dark-mut);margin-bottom:9px}
.field label .req{color:var(--ember)}
.field input,.field select,.field textarea{
  width:100%;background:var(--void);border:1px solid var(--ink-line-2);border-radius:var(--r);
  padding:14px 16px;color:var(--on-dark);font-family:var(--f-sans);font-size:.98rem;transition:border-color .25s,background .25s;
}
.field textarea{resize:vertical;min-height:120px;line-height:1.55}
.field input::placeholder,.field textarea::placeholder{color:var(--on-dark-dim)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brass);background:#0d0e10}
.field select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23c6963f' stroke-width='1.6' fill='none'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center;padding-right:40px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-note{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.04em;color:var(--on-dark-dim);margin-top:6px;line-height:1.5}
.form-msg{margin-top:16px;padding:14px 16px;border-radius:var(--r);font-size:.92rem;display:none}
.form-msg.ok{display:block;background:rgba(198,150,63,.1);border:1px solid rgba(198,150,63,.35);color:var(--brass-bright)}
@media (max-width:560px){.grid-2{grid-template-columns:1fr}}

/* contact info panel */
.contact-info{display:flex;flex-direction:column;gap:2px}
.ci-row{display:flex;gap:16px;align-items:flex-start;padding:22px 0;border-bottom:1px solid var(--ink-line)}
.ci-row:first-child{padding-top:0}
.ci-row .ci-k{font-family:var(--f-mono);font-size:.66rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--brass);flex:none;width:96px;padding-top:4px}
.ci-row .ci-v{font-size:1.05rem;font-weight:600;letter-spacing:-.01em}
.ci-row .ci-v small{display:block;font-weight:400;color:var(--on-dark-mut);font-size:.85rem;margin-top:4px;letter-spacing:0}
.ci-row a.ci-v:hover{color:var(--brass)}

/* ---------- CTA band ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--void);border-top:1px solid var(--ink-line)}
.cta-band .cta-in{position:relative;display:grid;grid-template-columns:1.2fr auto;gap:40px;align-items:center}
.cta-band .display{font-size:clamp(2rem,4.6vw,3.4rem)}
.cta-glow{position:absolute;inset:0;pointer-events:none;background:radial-gradient(60% 120% at 85% 50%,rgba(198,150,63,.14),transparent 70%)}
@media (max-width:820px){.cta-band .cta-in{grid-template-columns:1fr}}

/* ---------- Footer ---------- */
.site-foot{background:var(--void);border-top:1px solid var(--ink-line);padding-block:clamp(48px,6vw,80px) 40px}
.foot-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px}
.foot-brand .brand{font-size:1.3rem}
.foot-brand p{color:var(--on-dark-mut);font-size:.92rem;line-height:1.6;margin-top:16px;max-width:34ch}
.foot-col h5{font-family:var(--f-mono);font-size:.66rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--on-dark-dim);margin-bottom:16px}
.foot-col a,.foot-col p{display:block;color:var(--on-dark-mut);font-size:.92rem;padding:6px 0;transition:color .25s}
.foot-col a:hover{color:var(--on-dark)}
.foot-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;align-items:center;margin-top:clamp(40px,5vw,64px);padding-top:28px;border-top:1px solid var(--ink-line)}
.foot-bottom p{font-size:.8rem;color:var(--on-dark-dim);line-height:1.5}
.foot-bottom .mono{color:var(--on-dark-dim)}
.disclaimer{font-size:.76rem;color:var(--on-dark-dim);line-height:1.6;max-width:80ch;margin-top:18px}

/* ---------- Page hero (interior pages) ---------- */
.page-hero{background:var(--void);color:var(--on-dark);position:relative;overflow:hidden;padding-top:clamp(120px,15vh,168px);padding-bottom:clamp(44px,6vw,76px)}
.page-hero .hero-grid{opacity:.4}
.page-hero .crumb{font-family:var(--f-mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--on-dark-dim);display:flex;gap:10px;align-items:center}
.page-hero .crumb b{color:var(--brass)}
.page-hero .display{font-size:clamp(2.2rem,5.4vw,4.4rem);margin:.35em 0 .4em}
.page-hero .lead{color:var(--on-dark-mut);max-width:56ch}

/* section index chip used as structural device */
.lvl-chip{font-family:var(--f-mono);font-size:.7rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--brass);display:inline-flex;align-items:center;gap:9px}
.lvl-chip .trigram{width:.85em;color:var(--brass)}

/* prose helpers */
.prose p{color:var(--on-dark-mut);line-height:1.72;font-size:1.02rem;margin-bottom:1.1em;max-width:70ch}
.skin-plaster .prose p,.skin-paper .prose p{color:var(--on-light-mut)}
.prose p strong{color:var(--on-dark);font-weight:700}
.skin-plaster .prose p strong,.skin-paper .prose p strong{color:var(--on-light)}
.muted{color:var(--on-dark-mut)}
.brass-t{color:var(--brass)}
.center{text-align:center}
.mt-s{margin-top:14px}.mt-m{margin-top:26px}.mt-l{margin-top:44px}
.mb-0{margin-bottom:0}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease-out),transform .7s var(--ease-out)}
.reveal.in{opacity:1;transform:none}
.reveal[data-d="1"]{transition-delay:.08s}
.reveal[data-d="2"]{transition-delay:.16s}
.reveal[data-d="3"]{transition-delay:.24s}
.reveal[data-d="4"]{transition-delay:.32s}
.reveal[data-d="5"]{transition-delay:.4s}

/* ---------- Responsive ---------- */
@media (max-width:1000px){
  .hero-inner{grid-template-columns:1fr;gap:44px}
  .stack{max-width:400px}
  .g-4{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .foot-top{grid-template-columns:1fr 1fr}
  .cta-band .cta-in{align-items:start}
}
@media (max-width:820px){
  .g-3,.spaces,.models3{grid-template-columns:1fr}
  .ref-metrics{}
  .risk-grid{grid-template-columns:1fr}
  .checklist{grid-template-columns:1fr}
}
@media (max-width:720px){
  .nav-links,.nav-cta .btn{display:none}
  .nav-toggle{display:flex}
  :root{--rail:0px}
  .g-2{grid-template-columns:1fr}
  .foot-top{grid-template-columns:1fr}
  .hero-metrics{gap:22px 30px}
}
@media (max-width:480px){
  .stats{grid-template-columns:1fr}
  .hero .display{font-size:clamp(2.3rem,10vw,3rem)}
}

/* reduced motion */
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
  .floor .f-fill{transform:scaleX(1)}
}

/* focus visibility */
:focus-visible{outline:2px solid var(--brass);outline-offset:3px;border-radius:2px}