:root{
  --bg:#0b0d0e; --bg2:#101315; --surface:#14181a; --line:#23292c; --line2:#323a3e;
  --text:#e8eae7; --muted:#a3abae; --accent:#f5a524; --accent-ink:#141006; --water:#7db4e0;
  --sans:"Archivo",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --pad:clamp(20px,4vw,48px);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
img,canvas{display:block;max-width:100%}
a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:#ffc35c}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
h1,h2,h3{font-stretch:118%;font-weight:700;line-height:1.08;letter-spacing:-.01em;margin:0;text-wrap:balance}
p{margin:0;text-wrap:pretty}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:12px;top:-60px;z-index:100;background:var(--accent);color:var(--accent-ink);padding:10px 14px;font-weight:600}
.skip:focus{top:12px}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 var(--pad)}
.muted{color:var(--muted)}
.small{font-size:14px}

/* topbar */
.topbar{position:fixed;inset:0 0 auto;z-index:50;background:rgba(11,13,14,.82);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:24px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;font-weight:700;font-stretch:112%;letter-spacing:.01em}
.brand:hover{color:var(--text)}
#menu{display:flex;align-items:center;gap:28px}
#menu a{color:var(--muted);text-decoration:none;font-size:15px}
#menu a:hover{color:var(--text)}
#menu a.btn{color:var(--accent-ink)}
.nav-toggle{display:none;background:none;border:1px solid var(--line2);width:44px;height:44px;flex-direction:column;justify-content:center;align-items:center;gap:6px;cursor:pointer}
.nav-toggle i{display:block;width:18px;height:1.5px;background:var(--text);transition:transform .2s}
.nav-toggle[aria-expanded="true"] i:first-of-type{transform:translateY(3.75px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] i:last-of-type{transform:translateY(-3.75px) rotate(-45deg)}

/* buttons, badges */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;background:var(--accent);color:var(--accent-ink);font-weight:600;font-size:16px;text-decoration:none;border:1px solid var(--accent);transition:background .15s,color .15s}
.btn:hover{background:#ffc35c;color:var(--accent-ink)}
.btn-sm{min-height:38px;padding:0 14px;font-size:14px}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line2)}
.btn-ghost:hover{background:transparent;border-color:var(--text);color:var(--text)}
.actions{display:flex;flex-wrap:wrap;gap:12px}
.badge{display:inline-flex;align-items:center;gap:8px;align-self:flex-start;font-family:var(--mono);font-size:12px;letter-spacing:.04em;text-transform:uppercase;color:var(--accent);border:1px solid rgba(245,165,36,.45);padding:4px 10px}
.badge::before{content:"";width:6px;height:6px;background:var(--accent);border-radius:50%}
.badge-plan{color:var(--muted);border:1px dashed var(--line2)}
.badge-plan::before{background:none;border:1px solid var(--muted)}
.caption{font-family:var(--mono);font-size:12px;color:var(--muted);letter-spacing:.02em;margin-top:12px}

/* sections */
.section{padding:clamp(80px,12vw,150px) 0;border-top:1px solid var(--line)}
.kicker{display:flex;align-items:center;gap:12px;font-family:var(--mono);font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:22px}
.kicker span{color:var(--accent)}
.kicker::after{content:"";flex:0 0 48px;height:1px;background:var(--line2)}
h2{font-size:clamp(32px,4.6vw,56px)}
h3{font-size:21px;font-stretch:110%;line-height:1.2}
.lead{font-size:clamp(18px,1.6vw,21px);color:var(--muted);max-width:40em}
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(32px,6vw,96px);align-items:start}
.prose{display:flex;flex-direction:column;gap:20px;color:var(--muted);font-size:18px}
.prose strong{color:var(--text);font-weight:600}
.prose-p{color:var(--muted);margin-top:24px;font-size:18px;max-width:34em}
.ticks{list-style:none;margin:8px 0 0;padding:0;border-top:1px solid var(--line)}
.ticks li{padding:14px 0 14px 28px;border-bottom:1px solid var(--line);position:relative;color:var(--text);font-size:16px}
.ticks li::before{content:"";position:absolute;left:2px;top:24px;width:12px;height:1.5px;background:var(--accent)}
.head-row{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;flex-wrap:wrap;margin-bottom:48px}
.head-note{max-width:26em;font-size:15px}

/* hero */
.hero{position:relative;min-height:100vh;min-height:100svh;display:flex;flex-direction:column;justify-content:center;padding:120px 0 70px;overflow:hidden;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:64px 64px;background-position:center}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 65% 55%,transparent 0,var(--bg) 75%);pointer-events:none}
.scene{position:relative}
.scene canvas{width:100%;height:100%;opacity:0;transition:opacity .8s}
.scene canvas.ready{opacity:1}
.scene-hero{position:absolute;inset:0}
.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,var(--bg) 0%,rgba(11,13,14,.85) 32%,rgba(11,13,14,0) 62%);pointer-events:none}
.hero-inner{position:relative;display:flex;flex-direction:column;gap:28px}
.hero h1{font-size:clamp(38px,5.8vw,78px);max-width:11.5em;font-stretch:120%}
.hero .lead{max-width:34em}
.status{display:flex;align-items:center;gap:10px;font-family:var(--mono);font-size:13px;color:var(--muted);letter-spacing:.04em;text-transform:uppercase}
.dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(245,165,36,.18)}
.hero-caption{position:absolute;left:0;right:0;bottom:22px;margin:0 auto;text-align:right}

/* how */
.how-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(32px,5vw,72px);margin-top:48px}
.stage{grid-column:2;grid-row:1;position:sticky;top:max(88px,calc(50vh - 360px));height:min(calc(100vh - 120px),720px);display:flex;flex-direction:column}
.scene-stage{flex:1;min-height:0;border:1px solid var(--line);background:var(--bg2)}
.stage-tag{position:absolute;top:14px;left:16px;font-family:var(--mono);font-size:13px;color:var(--muted)}
.stage-tag span{color:var(--accent)}
.steps{grid-column:1;grid-row:1;list-style:none;margin:0;padding:0}
.step{min-height:78vh;display:flex;flex-direction:column;justify-content:center;gap:16px;border-left:1px solid var(--line);padding-left:28px;opacity:.4;transition:opacity .35s,border-color .35s}
.step.is-active{opacity:1;border-left-color:var(--accent)}
.step h3{font-size:clamp(24px,2.4vw,32px)}
.step p{color:var(--muted)}
.step-n{font-family:var(--mono);font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--accent)!important}
.legend-inline{display:flex;align-items:center;flex-wrap:wrap;gap:8px 10px;font-size:14px}
.sw{width:14px;height:3px;display:inline-block}
.sw-accent{background:var(--accent)}
.sw-water{background:var(--water);margin-left:10px}

/* cards */
.cards{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));border-top:1px solid var(--line);border-left:1px solid var(--line)}
.card{display:flex;flex-direction:column;gap:12px;padding:28px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-height:260px}
.card p{color:var(--muted);font-size:16px}
.card .badge{margin-top:auto}
.card-n{font-family:var(--mono);font-size:12px;color:var(--muted)!important;letter-spacing:.06em}
.card-plan{background:repeating-linear-gradient(135deg,transparent 0 10px,rgba(255,255,255,.018) 10px 20px)}

/* viewer */
.viewer{display:grid;grid-template-columns:minmax(0,1fr) 300px;border:1px solid var(--line);background:var(--bg2)}
.scene-viewer{height:min(72vh,640px);min-height:380px;cursor:grab}
.scene-viewer:active{cursor:grabbing}
.scene-viewer canvas{touch-action:pan-y}
.panel{border-left:1px solid var(--line);padding:24px;display:flex;flex-direction:column;gap:26px}
.ctrl{display:flex;flex-direction:column;gap:10px}
.ctrl-row{flex-direction:column;gap:12px}
.ctrl-label{font-family:var(--mono);font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);display:flex;justify-content:space-between}
.ctrl-label output{color:var(--accent)}
.seg{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line2)}
.seg button{min-height:44px;background:transparent;color:var(--muted);border:0;font:inherit;font-size:14px;cursor:pointer;padding:0 8px}
.seg button+button{border-left:1px solid var(--line2)}
.seg button[aria-pressed="true"]{background:var(--text);color:var(--bg);font-weight:600}
input[type=range]{width:100%;accent-color:var(--accent);height:28px}
.check{display:flex;align-items:center;gap:10px;font-size:15px;cursor:pointer;min-height:28px}
.check input{width:18px;height:18px;accent-color:var(--accent)}
.legend{display:grid;grid-template-columns:repeat(13,1fr);height:14px}
.legend-ends{display:flex;justify-content:space-between;font-family:var(--mono);font-size:12px;color:var(--muted)}

/* enkitek */
.disciplines{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.disciplines li{display:flex;align-items:baseline;gap:20px;padding:22px 0;border-bottom:1px solid var(--line);font-size:clamp(20px,2vw,26px);font-stretch:110%;font-weight:600}
.disciplines span{font-family:var(--mono);font-size:13px;color:var(--accent);font-weight:400}

/* contact */
.contact{background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:64px 64px}
.contact-inner{display:flex;flex-direction:column;gap:24px;align-items:flex-start}
.contact h2{max-width:14em}

/* footer */
.footer{border-top:1px solid var(--line);padding:64px 0 28px;font-size:15px;color:var(--muted)}
.footer-grid{display:grid;grid-template-columns:1fr 1.4fr 1.2fr;gap:40px}
.footer-grid p+p{margin-top:12px}
.f-brand{color:var(--text);font-weight:700;font-stretch:112%;margin-bottom:12px!important}
.f-title{font-family:var(--mono);font-size:12px;text-transform:uppercase;letter-spacing:.06em;margin-bottom:10px}
.privacy summary{cursor:pointer;color:var(--text);font-family:var(--mono);font-size:12px;text-transform:uppercase;letter-spacing:.06em;min-height:28px}
.privacy p{margin-top:12px}
.footer-base{display:flex;justify-content:space-between;gap:20px;margin-top:56px;padding-top:20px;border-top:1px solid var(--line);font-size:14px}

/* fallback */
.no-webgl .scene canvas,.scene.is-fallback canvas{display:none}
.no-webgl .scene-stage,.no-webgl .scene-viewer,.scene.is-fallback{background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:32px 32px}

@media (max-width:960px){
  .nav-toggle{display:flex}
  #menu{position:fixed;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:var(--bg);border-bottom:1px solid var(--line);padding:8px var(--pad) 20px;display:none}
  .menu-open #menu{display:flex}
  #menu a{padding:14px 0;border-bottom:1px solid var(--line);font-size:17px}
  #menu a.btn{margin-top:16px;border:0;justify-content:center}
  .split,.footer-grid{grid-template-columns:1fr}
  .how-grid{display:block}
  .stage{top:64px;height:44vh;z-index:5;background:var(--bg);padding:10px 0 4px;margin:0 calc(var(--pad)*-1);padding-left:var(--pad);padding-right:var(--pad)}
  .stage .caption{margin-top:6px}
  .step{min-height:62vh;padding-left:20px}
  .viewer{grid-template-columns:1fr}
  .panel{border-left:0;border-top:1px solid var(--line)}
  .scene-viewer{height:56vh;min-height:320px}
  .hero-shade{background:linear-gradient(180deg,rgba(11,13,14,.55) 0%,rgba(11,13,14,.9) 60%,var(--bg) 100%)}
  .hero{justify-content:flex-end}
  .hero-caption{text-align:left;position:relative;bottom:auto;margin-top:28px}
}