:root{
  --bg:#ffffff; --bg-alt:#f4f7fc; --ink:#0f172a; --muted:#53627a;
  --line:#dbe3ef; --accent:#12183D; --accent-soft:#e8eaf4; --accent-ink:#ffffff; --card:#ffffff;
  --ph:#b45309; --ease:cubic-bezier(.22,.8,.3,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px;color-scheme:light}
body{margin:0;background:var(--bg);color:var(--ink);
  font:17px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;overflow-x:hidden}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
h1,h2,h3{line-height:1.2;margin:0 0 .5em}
h1{font-size:clamp(2.1rem,5vw,3.5rem);letter-spacing:-.025em}
h2{font-size:clamp(1.55rem,3vw,2.15rem);letter-spacing:-.015em}
h3{font-size:1.1rem}
h3.sub{margin-top:2.4rem}
p{margin:0 0 1em}
a{color:var(--accent)}

/* nav */
.nav{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;
  padding:10px 20px;background:rgba(255,255,255,.85);backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;transition:border-color .3s,box-shadow .3s}
.nav.scrolled{border-bottom-color:var(--line);box-shadow:0 4px 18px rgba(15,23,42,.06)}
.brand{display:flex;align-items:center;text-decoration:none}
.brand img{display:block;height:52px;width:52px;object-fit:contain}
.nav nav{display:flex;gap:20px;align-items:center}
.nav nav a{text-decoration:none;color:var(--muted);font-size:.95rem;transition:color .2s}
.nav nav a:hover{color:var(--ink)}
.nav .cta{color:var(--accent-ink);background:var(--accent);padding:7px 16px;border-radius:8px;transition:transform .2s var(--ease),box-shadow .2s}
.nav .cta:hover{color:var(--accent-ink);transform:translateY(-1px);box-shadow:0 6px 16px rgba(18,24,61,.3)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);color:var(--ink);
  padding:6px 12px;border-radius:6px;font:inherit}

/* sections */
section{padding:84px 0}
section.alt{background:var(--bg-alt)}
.hero{position:relative;overflow:hidden;padding:110px 0 90px;
  background:linear-gradient(180deg,#f2f3f9 0%,#fff 100%)}
.blob{position:absolute;border-radius:50%;filter:blur(70px);opacity:.5;pointer-events:none}
.b1{width:420px;height:420px;background:#d4d8ee;top:-120px;right:-80px;animation:float 14s ease-in-out infinite}
.b2{width:320px;height:320px;background:#d9f3e8;bottom:-120px;left:-60px;animation:float 18s ease-in-out infinite reverse}
@keyframes float{50%{transform:translate(30px,24px)}}
.hero-grid{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.eyebrow{color:var(--accent);font-weight:700;text-transform:uppercase;letter-spacing:.12em;font-size:.8rem}
.lead,.section-lead{color:var(--muted);font-size:1.15rem;max-width:62ch}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.btn{display:inline-block;padding:12px 22px;border:1px solid var(--line);background:#fff;border-radius:10px;
  text-decoration:none;color:var(--ink);font-weight:600;
  transition:transform .25s var(--ease),box-shadow .25s,border-color .25s}
.btn:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(15,23,42,.1);border-color:#b9c7dd}
.btn.primary{background:linear-gradient(135deg,#151B44,#0C1233);border-color:#12183D;color:var(--accent-ink)}
.btn.primary:hover{box-shadow:0 10px 24px rgba(18,24,61,.35)}

/* grids and cards */
.grid{display:grid;gap:20px;margin-top:32px}
.grid.three{grid-template-columns:repeat(3,1fr)}
.grid.two{grid-template-columns:repeat(2,1fr)}
.grid.four{grid-template-columns:repeat(4,1fr)}
.grid.one{grid-template-columns:1fr;margin-top:0}
.grid.split{align-items:center}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:24px;
  transition:transform .3s var(--ease),box-shadow .3s,border-color .3s}
.card:hover{transform:translateY(-4px);box-shadow:0 14px 32px rgba(15,23,42,.09);border-color:#c3d2ea}
.card p:last-child{margin:0}
.card p{color:var(--muted)}
.ico{width:44px;height:44px;border-radius:12px;background:var(--accent-soft);display:grid;place-items:center;margin-bottom:14px}
.ico svg,.chips svg{fill:none;stroke:var(--accent);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.ico svg{width:24px;height:24px}
.stat .num{font-size:2.6rem;font-weight:800;color:var(--accent);line-height:1.1;margin-bottom:6px;letter-spacing:-.02em}
.case{margin-top:20px}

/* figures */
.figure{margin:0}
.figure img,.figure svg{width:100%;height:auto;display:block}
.figure.wide{margin:32px 0}
.figure.wide img{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px}
figcaption{color:var(--muted);font-size:.9rem;margin-top:10px}
.hero-art{position:relative;display:grid;place-items:center;aspect-ratio:1/1;width:100%}
.art-logo{position:relative;width:88%;height:auto;filter:drop-shadow(0 18px 34px rgba(18,24,61,.16))}
@media (prefers-reduced-motion:no-preference){.art-logo{animation:bob 7s ease-in-out infinite}}
@keyframes bob{50%{transform:translateY(-10px)}}

/* trajectory chart (inline so it can draw on scroll) */
#traj{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px}
.g-ax{stroke:#8a96a6;stroke-width:1.5;fill:none}
.g-line{stroke:#8a96a6;stroke-opacity:.35;stroke-width:1;stroke-dasharray:4 5}
.g-past{stroke:#8a96a6;stroke-width:3;fill:none}
.g-up,.g-down{fill:none;stroke-width:4;stroke-linecap:round}
.g-up{stroke:#1faa72}.g-down{stroke:#e5484d}
.g-dot circle{fill:#12183D}
.g-dot .ring{fill:none;stroke:#12183D;stroke-opacity:.4;stroke-width:2}
.g-t{font:600 13px system-ui,sans-serif;fill:#6b7a90}
.g-lab{font:700 14px system-ui,sans-serif}
.g-lab.up{fill:#1faa72}.g-lab.down{fill:#e5484d}
.js #traj .g-past,.js #traj .g-up,.js #traj .g-down{stroke-dasharray:1;stroke-dashoffset:1}
.js #traj .g-dot,.js #traj .g-lab,.js #traj .g-t{opacity:0}
#traj.in .g-past{stroke-dashoffset:0;transition:stroke-dashoffset 1.1s ease .2s}
#traj.in .g-up,#traj.in .g-down{stroke-dashoffset:0;transition:stroke-dashoffset 1.3s ease 1.2s}
#traj.in .g-dot,#traj.in .g-lab,#traj.in .g-t{opacity:1;transition:opacity .6s ease 1s}
#traj.in .g-lab{transition-delay:2.2s}
#traj .g-dot .ring{transform-box:fill-box;transform-origin:center}
#traj.in .g-dot .ring{animation:pulse 2.8s ease-out 1.4s infinite}
@keyframes pulse{0%{transform:scale(.6);opacity:.9}100%{transform:scale(2.2);opacity:0}}

/* layers */
.layers{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.layers li{display:flex;gap:18px;align-items:flex-start;background:var(--card);
  border:1px solid var(--line);border-radius:14px;padding:20px;
  transition:transform .3s var(--ease),box-shadow .3s}
.layers li:hover{transform:translateX(6px);box-shadow:0 10px 26px rgba(15,23,42,.08)}
.tag{flex:none;background:var(--accent);color:var(--accent-ink);font-size:.75rem;font-weight:700;
  padding:4px 10px;border-radius:99px;margin-top:2px}
.layers p{margin:0;color:var(--muted)}

/* states */
.states{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
.st{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:99px;font-weight:600;font-size:.95rem;
  background:#fff;border:1px solid var(--line);transition:transform .25s var(--ease),box-shadow .25s}
.st:hover{transform:translateY(-2px);box-shadow:0 8px 18px rgba(15,23,42,.08)}
.st i{width:10px;height:10px;border-radius:50%;background:var(--c)}
.s-stable{--c:#2f6bff}.s-adaptive{--c:#8b5cf6}.s-local{--c:#0ea5a4}.s-global{--c:#1faa72}
.s-unstable{--c:#f59e0b}.s-critical{--c:#e5484d}.s-ponr{--c:#9f1239}

/* steps and chips */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:32px;position:relative}
.step{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;
  transition:transform .3s var(--ease),box-shadow .3s}
.step:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(15,23,42,.09)}
.step span{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;
  background:var(--accent);color:var(--accent-ink);font-weight:700;margin-bottom:12px}
.step p{color:var(--muted);margin:0}
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chips span{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:#fff;
  border-radius:99px;padding:8px 16px;color:var(--ink);font-weight:500;
  transition:transform .25s var(--ease),box-shadow .25s,border-color .25s}
.chips span:hover{transform:translateY(-2px);box-shadow:0 8px 18px rgba(18,24,61,.12);border-color:var(--accent)}
.chips svg{width:18px;height:18px}
.muted{color:var(--muted)}

.contact{text-align:center;padding:96px 0}
.contact .section-lead{margin:0 auto 26px}
.note{color:var(--ph);font-size:.85rem;margin-top:14px}

footer{border-top:1px solid var(--line);padding:24px 0;color:var(--muted);font-size:.9rem}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* scroll reveal (only when JS is on) */
.js .reveal{opacity:0;transform:translateY(26px);
  transition:opacity .8s var(--ease),transform .8s var(--ease)}
.js .reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}
.reveal.d4{transition-delay:.32s}.reveal.d5{transition-delay:.4s}.reveal.d6{transition-delay:.48s}.reveal.d7{transition-delay:.56s}
/* hover transforms must beat the reveal transition once shown */
.js .card.reveal.in,.js .step.reveal.in,.js .st.reveal.in,.js .chips span.reveal.in,.js .layers li.reveal.in{transition-delay:0s;
  transition:opacity .8s var(--ease),transform .3s var(--ease),box-shadow .3s,border-color .3s}

@media (max-width:820px){
  .grid.three,.grid.two,.grid.four,.steps,.hero-grid{grid-template-columns:1fr}
  .nav-toggle{display:block}
  .nav nav{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;
    align-items:stretch;gap:0;background:#fff;border-bottom:1px solid var(--line);padding:8px 20px 16px}
  .nav nav.open{display:flex}
  .nav nav a{padding:10px 0}
  .nav .cta{text-align:center;margin-top:8px}
  section{padding:56px 0}
  .hero{padding:70px 0 56px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none;transition:none}
  .blob{animation:none}
  .js #traj .g-past,.js #traj .g-up,.js #traj .g-down{stroke-dashoffset:0}
  .js #traj .g-dot,.js #traj .g-lab,.js #traj .g-t{opacity:1}
}
.section-lead.full-center{max-width:none;width:100%;text-align:center}

/* centred section headers, full width */
section h2,.section-lead{text-align:center}
.section-lead{max-width:none;width:100%}
h3.sub,h3.sub+.muted{text-align:center}
.states,.chips{justify-content:center}

/* contact form */
.form{max-width:720px;margin:34px auto 0;text-align:left;background:#fff;border:1px solid var(--line);
  border-radius:16px;padding:28px;box-shadow:0 14px 36px rgba(15,23,42,.06)}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form label{display:block;font-weight:600;font-size:.92rem;margin-bottom:16px}
.form input,.form textarea{display:block;width:100%;margin-top:6px;padding:11px 13px;font:inherit;font-weight:400;
  color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:10px;
  transition:border-color .2s,box-shadow .2s}
.form textarea{resize:vertical;min-height:120px}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.form .invalid{border-color:#e5484d}
.form-foot{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.form-foot .btn{cursor:pointer;font:inherit;font-weight:600}
.form-status{margin:0;color:var(--muted);font-size:.92rem}
.form .note{margin:16px 0 0;text-align:left}
@media (max-width:820px){.form .row{grid-template-columns:1fr;gap:0}.form{padding:20px}}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}