:root {
  color-scheme: dark;
  --ink: #061019;
  --ink-2: #091a25;
  --panel: rgba(10, 26, 36, .72);
  --panel-solid: #0b1b26;
  --line: rgba(157, 218, 235, .16);
  --line-hot: rgba(121, 232, 255, .44);
  --text: #eef9fb;
  --muted: #9fb4bc;
  --cyan: #70e7ff;
  --cyan-soft: #b8f3ff;
  --gold: #e5bd78;
  --green: #78f2b4;
  --amber: #ffc76e;
  --red: #ff7d83;
  --serif: "Instrument Serif", Georgia, serif;
  --sans: "Space Grotesk", Inter, system-ui, sans-serif;
  --radius: 28px;
  --shadow: 0 34px 100px rgba(0, 0, 0, .44);
}

/* PAIL product system */
.product-hero{min-height:760px}.brain-stage{position:relative;min-height:560px;border-left:1px solid rgba(129,224,196,.2);overflow:hidden;background:radial-gradient(circle at center,rgba(37,166,136,.16),transparent 45%)}
.brain-core{position:absolute;inset:50% auto auto 50%;transform:translate(-50%,-50%);width:210px;aspect-ratio:1;display:grid;place-content:center;text-align:center;border:1px solid #65d7b3;background:#071a20;box-shadow:0 0 70px rgba(59,217,177,.2)}.brain-core small,.brain-core span{font-size:11px;color:#8fa8ad;text-transform:uppercase}.brain-core strong{font-size:27px;line-height:1.05;margin:10px 0}.brain-node{position:absolute;padding:10px 14px;border:1px solid rgba(255,255,255,.18);font-size:11px;background:#09141b}.node-a{left:5%;top:18%}.node-b{right:4%;top:18%}.node-c{right:5%;bottom:17%}.node-d{left:5%;bottom:17%}.brain-packet{position:absolute;width:7px;height:7px;background:#71e3bd;box-shadow:0 0 16px #71e3bd;animation:brainPulse 4s linear infinite}.p1{left:17%;top:29%}.p2{right:18%;top:29%;animation-delay:1.3s}.p3{right:18%;bottom:28%;animation-delay:2.6s}@keyframes brainPulse{0%{opacity:0;transform:scale(.5)}35%{opacity:1;transform:translate(115px,95px) scale(1)}70%{opacity:1}100%{opacity:0;transform:translate(180px,150px) scale(.5)}}
.group-preview{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}.group-preview a{display:block;color:inherit;padding:30px;min-height:220px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);transition:.25s}.group-preview a:hover{background:rgba(91,214,177,.07);transform:translateY(-4px)}.group-preview span,.group-head>span{font-size:12px;color:var(--accent)}.group-preview h3{font-size:21px;margin:48px 0 10px}.group-preview p{font-size:13px;color:var(--muted);line-height:1.6}
.animated-rail{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);overflow:hidden}.animated-rail>div{background:#09151c;padding:22px;min-height:130px;z-index:1}.animated-rail b{display:block;color:var(--accent);font-size:11px}.animated-rail span{display:block;font-weight:600;margin:22px 0 5px}.animated-rail small{color:var(--muted)}.animated-rail>i{position:absolute;top:0;bottom:0;width:90px;background:linear-gradient(90deg,transparent,rgba(89,224,180,.16),transparent);animation:railScan 4s linear infinite}@keyframes railScan{from{left:-90px}to{left:100%}}
.spotlight{display:grid;grid-template-columns:1.05fr .95fr;background:#0a171e;border:1px solid var(--line)}.spotlight-copy{padding:54px}.spotlight img{width:100%;height:100%;min-height:420px;object-fit:cover}.spotlight h2{font-size:44px}.spotlight p{color:var(--muted);line-height:1.75;margin:18px 0 24px}
.product-group{scroll-margin-top:80px}.group-head{display:grid;grid-template-columns:70px 1fr;align-items:start;margin-bottom:30px}.group-head h2{font-size:42px;margin:0}.group-head p{color:var(--muted)}.product-list{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}.product-list.two{grid-template-columns:repeat(2,1fr)}.product-list article{background:#08141b;padding:34px;min-height:275px}.product-list article.featured{background:#0c211f}.product-list b{font-size:10px;text-transform:uppercase;color:var(--accent)}.product-list h3{font-size:24px;margin:36px 0 12px}.product-list p{color:var(--muted);line-height:1.65}.product-list small{display:block;color:#759097;margin-top:24px}.product-list a{display:inline-block;margin-top:20px;color:var(--accent)}
.machine-page{background:linear-gradient(90deg,rgba(9,28,34,.96),rgba(5,15,22,.75)),url('lab-robot.png') center/cover}.machine-loop{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;align-items:center;gap:12px}.machine-loop>div{border:1px solid var(--line);padding:24px;text-align:center;background:rgba(5,16,22,.9)}.machine-loop .core{border-color:var(--accent)}.machine-loop small{display:block;color:var(--muted);margin-top:8px}.machine-loop>span{grid-column:1/-1;text-align:center;color:var(--muted);font-size:12px}.module-groups{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.module-groups article{border-top:2px solid var(--accent);background:#09151c;padding:30px}.module-groups span{color:var(--accent)}.module-groups h3{font-size:23px}.module-groups p,.module-groups li{color:var(--muted);line-height:1.65}.module-groups ul{padding-left:18px}.contract-panel{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line)}.contract-panel>div{background:#061118;padding:28px}.contract-panel pre{white-space:pre-wrap;color:#b9d8d1;font-size:12px;line-height:1.7}
.demo-selector{display:flex;gap:8px;margin-bottom:18px;overflow:auto}.demo-selector button,.scenario-controls button{border:1px solid var(--line);background:#09151c;color:var(--muted);padding:12px 16px;cursor:pointer}.demo-selector button.active,.scenario-controls button.active{color:#06130f;background:var(--accent);border-color:var(--accent)}.demo-workbench{display:grid;grid-template-columns:1.2fr .8fr;border:1px solid var(--line)}.demo-scene,.demo-result{padding:28px}.demo-result{border-left:1px solid var(--line);background:#061118}.scene-head{display:flex;justify-content:space-between;font-size:11px;color:var(--muted)}.demo-animation{height:260px;display:grid;grid-template-columns:1fr .7fr 1.3fr .7fr 1fr;align-items:center;margin:24px 0}.demo-source,.demo-target,.demo-core{border:1px solid var(--line);padding:22px 8px;text-align:center;font-size:11px}.demo-core{height:130px;display:grid;place-content:center;border-color:var(--accent);font-size:25px}.demo-core span{font-size:9px;color:var(--accent);margin-top:8px}.demo-stream{display:flex;justify-content:space-around}.demo-stream i{width:5px;height:5px;background:var(--muted);border-radius:50%}.demo-animation.running .demo-stream i{animation:packetMove .8s ease-in-out infinite alternate}.demo-animation.allow .demo-target{border-color:#65d7b3;color:#65d7b3}.demo-animation.block .demo-target{border-color:#ff715f;color:#ff715f}.demo-animation.clarify .demo-target{border-color:#f1c65c;color:#f1c65c}@keyframes packetMove{to{transform:translateX(15px);background:var(--accent);box-shadow:0 0 12px var(--accent)}}.scenario-controls{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}.demo-result pre{min-height:330px;white-space:pre-wrap;color:#b8d5d0;font-size:12px}.demo-result p{color:var(--muted);font-size:12px;line-height:1.6}.github-kit{display:grid;grid-template-columns:1fr 1fr auto;gap:1px;background:var(--line);align-items:stretch}.github-kit>div{background:#08141b;padding:28px}.github-kit b,.github-kit span{display:block}.github-kit span{color:var(--muted);margin-top:12px;font-size:13px}.github-kit>a{align-self:center;margin:24px}
@media(max-width:900px){.group-preview,.product-list,.module-groups{grid-template-columns:1fr 1fr}.brain-stage{min-height:420px}.spotlight,.demo-workbench,.contract-panel{grid-template-columns:1fr}.demo-result{border-left:0;border-top:1px solid var(--line)}.github-kit{grid-template-columns:1fr}.machine-loop{grid-template-columns:1fr}.machine-loop i{transform:rotate(90deg)}.machine-loop>span{grid-column:auto}}
@media(max-width:620px){.group-preview,.product-list,.product-list.two,.module-groups{grid-template-columns:1fr}.product-hero{min-height:auto}.brain-stage{min-height:380px}.brain-core{width:160px}.brain-node{font-size:9px}.animated-rail{grid-template-columns:1fr 1fr}.spotlight-copy{padding:28px}.demo-animation{height:220px;grid-template-columns:1fr .5fr 1.2fr .5fr 1fr}.demo-core{font-size:18px}.demo-source,.demo-target{font-size:9px;padding:15px 3px}}
@media(prefers-reduced-motion:reduce){.brain-packet,.animated-rail>i,.demo-animation.running .demo-stream i{animation:none!important}}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background:
    radial-gradient(circle at 18% 10%, rgba(39, 161, 190, .14), transparent 27rem),
    radial-gradient(circle at 86% 24%, rgba(229, 189, 120, .08), transparent 24rem),
    linear-gradient(180deg, #050c12 0%, #07131c 52%, #040a0f 100%);
  font: 400 16px/1.65 var(--sans);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(rgba(112, 231, 255, .026) 1px, transparent 1px),
    linear-gradient(90deg, rgba(112, 231, 255, .026) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, #000 0%, transparent 92%);
}

.noise {
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.65'/%3E%3C/svg%3E");
}

a { color: inherit; text-decoration: none; }
button, textarea, input { font: inherit; }
button { color: inherit; }
img { display: block; max-width: 100%; }
.container { width: min(1280px, calc(100% - 40px)); margin: 0 auto; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  padding: 14px 0;
  backdrop-filter: blur(22px);
  background: linear-gradient(180deg, rgba(5, 12, 18, .9), rgba(5, 12, 18, .62));
}

.nav-shell {
  min-height: 70px;
  padding: 8px 10px 8px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: rgba(8, 21, 30, .74);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: 0 16px 50px rgba(0, 0, 0, .25);
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 42px;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-hot);
  border-radius: 14px;
  color: var(--ink);
  background: linear-gradient(145deg, var(--cyan-soft), #4fbfd7);
  font: 600 1.55rem/1 var(--serif);
  box-shadow: 0 0 30px rgba(112, 231, 255, .18);
}
.brand span:last-child { display: grid; line-height: 1.1; }
.brand strong { font-size: 1.02rem; letter-spacing: .08em; }
.brand small { margin-top: 5px; color: var(--muted); font-size: .62rem; letter-spacing: .04em; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 11px 14px;
  color: #c6d8de;
  border-radius: 12px;
  font-size: .88rem;
  transition: .2s ease;
}
.nav-links a:hover, .nav-links a.active { color: white; background: rgba(112, 231, 255, .07); }
.nav-links .nav-cta {
  margin-left: 6px;
  color: #041117;
  background: var(--cyan-soft);
  font-weight: 700;
}
.nav-links .nav-cta:hover { color: #041117; background: white; }
.menu-btn {
  display: none;
  padding: 10px 13px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 11px;
}

.hero { padding: 30px 0 50px; }
.hero-grid { display: grid; grid-template-columns: .94fr 1.06fr; gap: 18px; min-height: 690px; }
.hero-copy, .hero-visual {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 34px;
  background: linear-gradient(150deg, rgba(10, 29, 40, .9), rgba(5, 14, 21, .82));
  box-shadow: var(--shadow);
}
.hero-copy {
  z-index: 1;
  padding: clamp(34px, 5vw, 70px);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.hero-copy::after {
  content: "";
  position: absolute;
  width: 480px;
  height: 480px;
  right: -280px;
  bottom: -280px;
  border: 1px solid rgba(112, 231, 255, .22);
  border-radius: 50%;
  box-shadow: 0 0 90px rgba(112, 231, 255, .1);
}
.status-line {
  width: fit-content;
  margin-bottom: 22px;
  padding: 8px 12px;
  display: flex;
  align-items: center;
  gap: 9px;
  color: #c5dce2;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: .74rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 5px rgba(120, 242, 180, .1), 0 0 18px var(--green);
  animation: pulse 2.2s infinite;
}
@keyframes pulse { 50% { box-shadow: 0 0 0 9px rgba(120, 242, 180, 0), 0 0 24px var(--green); } }

h1, h2, h3, p { margin-top: 0; }
.hero h1, .page-hero h1, .section-heading h2, .workflow h2, .boundary-copy h2, .cta-panel h2 {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -.035em;
}
.hero h1 { max-width: 770px; margin-bottom: 24px; font-size: clamp(3.7rem, 6.2vw, 6.3rem); line-height: .89; }
em { color: var(--cyan-soft); font-weight: 400; }
.lead { max-width: 680px; margin-bottom: 28px; color: #b9cdd3; font-size: 1.08rem; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 38px; }
.btn {
  min-height: 52px;
  padding: 0 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  border: 1px solid var(--line-hot);
  border-radius: 14px;
  cursor: pointer;
  font-weight: 700;
  transition: transform .2s ease, background .2s ease, border .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn.primary { color: #041117; background: linear-gradient(135deg, #c8f8ff, #66d7ef); box-shadow: 0 14px 35px rgba(83, 207, 234, .18); }
.btn.ghost { color: #d8e8ec; background: rgba(255, 255, 255, .025); border-color: var(--line); }
.hero-proof { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.hero-proof div { padding-top: 14px; border-top: 1px solid var(--line); }
.hero-proof strong { display: block; color: white; font-size: 1.45rem; }
.hero-proof span { color: var(--muted); font-size: .75rem; line-height: 1.35; }
.fine-print { margin: 16px 0 0; color: #6e8992; font-size: .67rem; }

.hero-visual { min-height: 690px; }
.hero-visual img { width: 100%; height: 100%; object-fit: cover; }
.visual-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 14, 21, .05), rgba(5, 14, 21, .28)), linear-gradient(90deg, rgba(5, 14, 21, .1), transparent);
}
.orbit { position: absolute; border: 1px solid rgba(184, 243, 255, .3); border-radius: 50%; box-shadow: 0 0 40px rgba(112, 231, 255, .08); }
.orbit-one { width: 360px; height: 360px; left: 29%; top: 20%; animation: rotate 24s linear infinite; }
.orbit-two { width: 270px; height: 270px; left: 35%; top: 26%; border-style: dashed; animation: rotate 18s linear infinite reverse; }
@keyframes rotate { to { transform: rotate(360deg); } }
.signal-card {
  position: absolute;
  min-width: 166px;
  padding: 13px 15px;
  display: grid;
  background: rgba(4, 17, 25, .76);
  border: 1px solid rgba(184, 243, 255, .35);
  border-radius: 14px;
  backdrop-filter: blur(18px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, .24);
}
.signal-card span { color: var(--cyan); font-size: .68rem; }
.signal-card b { letter-spacing: .1em; font-size: .82rem; }
.signal-card small { color: var(--muted); }
.signal-a { top: 12%; left: 6%; }
.signal-b { top: 46%; right: 5%; }
.signal-c { bottom: 9%; left: 9%; }

.signal-strip { overflow: hidden; border-block: 1px solid rgba(112, 231, 255, .09); background: rgba(5, 16, 23, .8); }
.signal-track {
  width: max-content;
  min-height: 64px;
  display: flex;
  align-items: center;
  gap: 28px;
  animation: marquee 28s linear infinite;
  color: #8199a1;
  font-size: .76rem;
  letter-spacing: .18em;
  text-transform: uppercase;
}
.signal-track i { width: 5px; height: 5px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 12px var(--cyan); }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-30%); } }

.section { padding: 86px 0; }
.section-heading { margin-bottom: 28px; display: grid; grid-template-columns: 1fr .75fr; gap: 40px; align-items: end; }
.section-heading h2, .workflow h2, .boundary-copy h2, .cta-panel h2 { margin: 6px 0 0; font-size: clamp(2.8rem, 5vw, 5.3rem); line-height: .95; }
.section-heading p, .workflow-copy > p, .boundary-copy > p, .cta-panel > p { color: var(--muted); }
.eyebrow { color: var(--gold); font-size: .72rem; font-weight: 700; letter-spacing: .2em; text-transform: uppercase; }

.prototype-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.prototype-card {
  position: relative;
  min-height: 420px;
  padding: 22px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(160deg, rgba(14, 36, 49, .8), rgba(6, 18, 27, .74));
  transition: transform .25s ease, border .25s ease;
}
.prototype-card::after {
  content: "";
  position: absolute;
  width: 190px;
  height: 190px;
  right: -100px;
  bottom: -100px;
  border: 1px solid rgba(112, 231, 255, .17);
  border-radius: 50%;
}
.prototype-card:hover { transform: translateY(-6px); border-color: rgba(112, 231, 255, .35); }
.prototype-card.featured { background: linear-gradient(160deg, rgba(17, 64, 76, .72), rgba(7, 22, 31, .84)); }
.card-top { display: flex; justify-content: space-between; align-items: center; }
.card-number { color: #66838c; font-size: .75rem; letter-spacing: .14em; }
.badge {
  width: fit-content;
  padding: 6px 9px;
  color: #9db1b8;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: .63rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.badge.live { color: var(--green); border-color: rgba(120, 242, 180, .25); background: rgba(120, 242, 180, .05); }
.badge.research { color: var(--amber); border-color: rgba(255, 199, 110, .22); }
.card-icon {
  width: 58px;
  height: 58px;
  margin: 58px 0 20px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-hot);
  border-radius: 18px;
  color: var(--cyan-soft);
  background: rgba(112, 231, 255, .06);
  font: 400 1.4rem/1 var(--serif);
}
.prototype-card h3 { margin-bottom: 12px; font: 400 2rem/1.02 var(--serif); }
.prototype-card p { color: var(--muted); font-size: .9rem; }
.card-link { margin-top: auto; color: var(--cyan-soft); font-size: .78rem; }
.card-link.muted { color: #66808a; }

.workflow-section { background: linear-gradient(180deg, rgba(4, 12, 18, .2), rgba(14, 41, 52, .22), rgba(4, 12, 18, .2)); }
.workflow { padding: 46px; display: grid; grid-template-columns: .9fr 1.1fr; gap: 70px; border: 1px solid var(--line); border-radius: 32px; background: rgba(6, 18, 26, .7); }
.workflow-copy { align-self: center; }
.text-link { color: var(--cyan-soft); font-weight: 700; }
.flow-stack { display: grid; gap: 10px; }
.flow-step {
  padding: 17px 18px;
  display: flex;
  gap: 16px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: rgba(255, 255, 255, .018);
}
.flow-step > span { width: 35px; color: #5e7b84; font-size: .72rem; }
.flow-step div { display: grid; }
.flow-step b { font-size: .92rem; }
.flow-step small { color: var(--muted); }
.flow-step.active { transform: translateX(18px); border-color: var(--line-hot); background: rgba(112, 231, 255, .06); box-shadow: 0 0 45px rgba(112, 231, 255, .07); }
.flow-step.active > span, .flow-step.active b { color: var(--cyan-soft); }

.boundary-grid { display: grid; grid-template-columns: 1fr .85fr; gap: 80px; align-items: center; }
.boundary-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.boundary-list span, .tag-row span {
  padding: 8px 11px;
  color: #b8cbd1;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, .02);
  font-size: .72rem;
}
.vault { position: relative; min-height: 480px; display: grid; place-items: center; }
.vault-ring {
  position: absolute;
  width: 390px;
  height: 390px;
  border: 1px solid rgba(112, 231, 255, .23);
  border-radius: 50%;
  box-shadow: inset 0 0 80px rgba(112, 231, 255, .06), 0 0 80px rgba(112, 231, 255, .08);
}
.vault-ring::before, .vault-ring::after { content: ""; position: absolute; inset: 36px; border: 1px dashed rgba(229, 189, 120, .22); border-radius: 50%; }
.vault-ring::after { inset: 78px; border-style: solid; border-color: rgba(112, 231, 255, .18); }
.vault-core {
  z-index: 1;
  width: 205px;
  aspect-ratio: 1;
  display: grid;
  place-content: center;
  text-align: center;
  border: 1px solid var(--line-hot);
  border-radius: 50%;
  background: radial-gradient(circle, #123a49, #071822 68%);
  box-shadow: 0 0 70px rgba(112, 231, 255, .16);
}
.vault-core small { color: var(--gold); font-size: .61rem; letter-spacing: .16em; }
.vault-core strong { font: 400 4rem/.9 var(--serif); }
.vault-core span { color: var(--muted); font-size: .68rem; }
.vault-note { position: absolute; bottom: 30px; color: #6e8891; font-size: .7rem; letter-spacing: .16em; text-transform: uppercase; }

.final-cta { padding-top: 32px; }
.cta-panel {
  min-height: 470px;
  padding: 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  border: 1px solid var(--line-hot);
  border-radius: 34px;
  background:
    radial-gradient(circle at 50% 45%, rgba(112, 231, 255, .16), transparent 30%),
    linear-gradient(150deg, #0b2733, #06131c);
  box-shadow: var(--shadow);
}
.cta-panel p { max-width: 620px; }

.page-hero { padding: 74px 0 30px; }
.page-hero-grid { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: end; padding-bottom: 44px; border-bottom: 1px solid var(--line); }
.page-hero h1 { max-width: 900px; margin: 12px 0 20px; font-size: clamp(3.7rem, 7vw, 7.5rem); line-height: .88; }
.page-hero p { max-width: 780px; color: var(--muted); font-size: 1.05rem; }
.page-index { color: #55727b; font-size: .66rem; letter-spacing: .15em; writing-mode: vertical-rl; }

.pipeline { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr auto 1fr; gap: 10px; align-items: center; }
.pipeline > i { color: #50707a; font-style: normal; }
.pipeline-node { min-height: 180px; padding: 20px; display: flex; flex-direction: column; justify-content: center; border: 1px solid var(--line); border-radius: 21px; background: var(--panel); }
.pipeline-node > span { margin-bottom: 20px; color: #607d86; font-size: .66rem; letter-spacing: .17em; }
.pipeline-node b { font-size: .95rem; }
.pipeline-node small { margin-top: 6px; color: var(--muted); font-size: .72rem; }
.pipeline-node.core { min-height: 220px; border-color: var(--line-hot); background: linear-gradient(145deg, #104255, #09212d); box-shadow: 0 0 60px rgba(112, 231, 255, .1); }
.pipeline-node.core > span, .pipeline-node.core b { color: var(--cyan-soft); }

.comparison { display: grid; grid-template-columns: 1fr auto 1fr; gap: 26px; align-items: center; }
.compare-card { padding: 32px; border: 1px solid var(--line); border-radius: 25px; background: var(--panel); }
.compare-card > span { font-size: .68rem; font-weight: 700; letter-spacing: .17em; }
.compare-card ul { margin: 24px 0 0; padding: 0; display: grid; gap: 15px; list-style: none; }
.compare-card li { padding-left: 24px; color: var(--muted); position: relative; }
.compare-card li::before { position: absolute; left: 0; }
.compare-card.before > span { color: var(--red); }
.compare-card.before li::before { content: "×"; color: var(--red); }
.compare-card.after { border-color: rgba(120, 242, 180, .25); }
.compare-card.after > span { color: var(--green); }
.compare-card.after li::before { content: "✓"; color: var(--green); }
.compare-arrow { color: var(--cyan); font-size: 1.7rem; }
.page-rca .hero-copy {
  background:
    radial-gradient(circle at 20% 20%, rgba(255, 199, 110, .12), transparent 28%),
    linear-gradient(160deg, rgba(14, 24, 43, .92), rgba(7, 16, 24, .82));
}
.page-rca .hero-visual img {
  filter: saturate(1.18) contrast(1.08) brightness(.95);
}
.page-rca .hero-visual .visual-shade {
  background:
    linear-gradient(180deg, rgba(4, 10, 18, .05), rgba(4, 10, 18, .22)),
    linear-gradient(90deg, rgba(255, 199, 110, .05), transparent 40%);
}
.page-rca .compare-card.before {
  border-color: rgba(112, 231, 255, .28);
  box-shadow: 0 0 48px rgba(112, 231, 255, .06);
}
.page-rca .compare-card.after {
  border-color: rgba(255, 199, 110, .28);
  box-shadow: 0 0 48px rgba(255, 199, 110, .06);
}
.page-rca .signal-card {
  border-color: rgba(255, 199, 110, .3);
  background: rgba(6, 15, 22, .8);
}
.page-rca .signal-card b { color: var(--gold); }
.proof-grid, .invariant-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.proof-grid article, .invariant {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel);
}
.proof-grid b { display: block; font: 400 3.5rem/1 var(--serif); color: var(--cyan-soft); }
.proof-grid span { display: block; margin: 8px 0 16px; color: white; font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; }
.proof-grid p, .invariant p { color: var(--muted); font-size: .82rem; }

.track-list { display: grid; gap: 18px; }
.track {
  min-height: 420px;
  padding: 24px;
  display: grid;
  grid-template-columns: 80px 1.1fr .9fr;
  gap: 32px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: linear-gradient(145deg, rgba(12, 31, 42, .8), rgba(5, 16, 24, .75));
}
.track-index { align-self: start; color: #52717a; font-size: .72rem; letter-spacing: .14em; }
.track h2 { margin: 14px 0 14px; font: 400 clamp(2.5rem, 4vw, 4.4rem)/.95 var(--serif); }
.track p { max-width: 670px; color: var(--muted); }
.tag-row { display: flex; flex-wrap: wrap; gap: 7px; margin: 20px 0; }
.coming { color: #5f7c85; }
.track-visual, .track-image { min-height: 300px; border: 1px solid var(--line); border-radius: 21px; overflow: hidden; background: #071821; }
.track-image img { width: 100%; height: 100%; min-height: 300px; object-fit: cover; }
.firewall-visual { padding: 30px; display: flex; align-items: center; justify-content: center; gap: 14px; background: radial-gradient(circle, rgba(112, 231, 255, .16), transparent 45%), #071821; }
.firewall-visual span { color: #66838c; font-size: .65rem; }
.firewall-visual i { width: 40px; height: 1px; background: var(--cyan); }
.firewall-visual strong { width: 94px; aspect-ratio: 1; display: grid; place-items: center; border: 1px solid var(--line-hot); border-radius: 50%; color: var(--cyan-soft); font-size: .72rem; box-shadow: 0 0 40px rgba(112, 231, 255, .14); }
.rca-visual { padding: 34px; display: grid; grid-template-columns: 1fr 1fr; place-items: center; gap: 24px; background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 32px 32px; }
.rca-visual span, .rca-visual b, .rca-visual strong { padding: 13px; border: 1px solid var(--line); border-radius: 12px; background: #081a24; font-size: .7rem; }
.rca-visual strong { color: var(--amber); border-color: rgba(255, 199, 110, .3); }

.architecture-visual { position: relative; overflow: hidden; border: 1px solid var(--line); border-radius: 28px; }
.architecture-visual img { width: 100%; max-height: 720px; object-fit: cover; }
.architecture-overlay { position: absolute; inset: auto 20px 20px; padding: 17px 20px; display: flex; justify-content: space-between; align-items: center; gap: 20px; border: 1px solid var(--line-hot); border-radius: 15px; background: rgba(3, 13, 20, .72); backdrop-filter: blur(20px); font-size: .7rem; letter-spacing: .11em; }
.architecture-overlay b { color: var(--cyan-soft); }
.architecture-map { display: grid; grid-template-columns: 1fr .6fr 1fr; gap: 20px; align-items: stretch; }
.map-column { padding: 28px; border: 1px solid var(--line); border-radius: 24px; background: var(--panel); }
.map-column h3 { margin: 8px 0 20px; font: 400 2.3rem/1 var(--serif); }
.map-column ul { margin: 0; padding: 0; display: grid; gap: 13px; list-style: none; color: var(--muted); }
.map-column li { padding-bottom: 12px; border-bottom: 1px solid rgba(157, 218, 235, .08); }
.map-column.private { border-color: rgba(229, 189, 120, .24); }
.map-core { padding: 18px; display: grid; place-items: center; text-align: center; border: 1px solid var(--line-hot); border-radius: 24px; background: linear-gradient(160deg, #104052, #071923); }
.map-core > span { color: #68929e; font-size: .6rem; letter-spacing: .17em; }
.map-core div { display: grid; gap: 8px; }
.map-core b { font: 400 2.5rem/1 var(--serif); color: var(--cyan-soft); }
.map-core small { color: var(--muted); }
.invariant > span { color: var(--gold); font-size: .7rem; }
.invariant h3 { margin: 26px 0 12px; font: 400 1.75rem/1 var(--serif); }

.developer-hero { background: radial-gradient(circle at 75% 35%, rgba(112, 231, 255, .07), transparent 26rem); }
.developer-contract {
  padding: 46px;
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 52px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 30px;
  background: linear-gradient(145deg, rgba(13, 39, 51, .8), rgba(5, 16, 24, .74));
}
.contract-copy h2 { margin: 10px 0 18px; font: 400 clamp(2.8rem, 4vw, 4.5rem)/.94 var(--serif); }
.contract-copy p { color: var(--muted); }
.contract-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.contract-chips span { padding: 7px 10px; color: #b7cbd1; border: 1px solid var(--line); border-radius: 999px; font-size: .68rem; }
.contract-flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr; gap: 9px; align-items: center; }
.contract-flow > div { min-height: 160px; padding: 16px; display: flex; flex-direction: column; justify-content: center; border: 1px solid var(--line); border-radius: 18px; background: rgba(3, 14, 21, .6); }
.contract-flow > div.guard-node { min-height: 205px; border-color: var(--line-hot); box-shadow: 0 0 45px rgba(112, 231, 255, .09); }
.contract-flow small { color: #5f7b84; }
.contract-flow b { margin: 20px 0 5px; color: var(--cyan-soft); font-size: .8rem; letter-spacing: .12em; }
.contract-flow span { color: var(--muted); font-size: .68rem; }
.contract-flow i { color: #54717a; font-style: normal; }
.developer-code-section { background: linear-gradient(180deg, transparent, rgba(10, 39, 51, .24), transparent); }
.developer-code-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 18px; }
.code-window { overflow: hidden; border: 1px solid var(--line-hot); border-radius: 24px; background: #030d13; box-shadow: var(--shadow); }
.code-window header { min-height: 58px; padding: 0 18px; display: flex; align-items: center; justify-content: space-between; color: #6e8992; border-bottom: 1px solid var(--line); font-size: .68rem; }
.code-window header b { color: var(--green); font-size: .58rem; letter-spacing: .15em; }
.code-window pre { min-height: 430px; border: 0; border-radius: 0; color: #c6e5eb; background: transparent; font-size: .8rem; }
.language-rules { display: grid; gap: 10px; }
.language-rules article { padding: 20px; display: grid; grid-template-columns: 42px 1fr; gap: 14px; border: 1px solid var(--line); border-radius: 19px; background: var(--panel); }
.language-rules article > span { color: var(--gold); font-size: .67rem; }
.language-rules b { font-size: .9rem; }
.language-rules p { margin: 5px 0 0; color: var(--muted); font-size: .76rem; }
.surface-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.surface-card { padding: 34px; border: 1px solid var(--line); border-radius: 27px; background: var(--panel); }
.surface-card > span { font-size: .65rem; font-weight: 700; letter-spacing: .16em; }
.surface-card.public { border-color: rgba(120, 242, 180, .24); }
.surface-card.public > span { color: var(--green); }
.surface-card.private { border-color: rgba(229, 189, 120, .24); }
.surface-card.private > span { color: var(--gold); }
.surface-card h3 { margin: 18px 0 24px; font: 400 2.6rem/1 var(--serif); }
.surface-card ul { margin: 0; padding: 0; display: grid; gap: 12px; list-style: none; color: var(--muted); }
.surface-card li { padding-bottom: 10px; border-bottom: 1px solid rgba(157, 218, 235, .08); }

.lab-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 18px; }
.console, .output-panel {
  min-height: 650px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 26px;
  background: rgba(5, 17, 25, .84);
  box-shadow: var(--shadow);
}
.console-head, .output-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; color: #708a93; font-size: .68rem; letter-spacing: .13em; }
.terminal-dot { width: 8px; height: 8px; display: inline-block; margin-right: 5px; border-radius: 50%; }
.red { background: var(--red); }.amber { background: var(--amber); }.green { background: var(--green); }.blue { background: var(--cyan); }
.scenario-row { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 24px; }
.scenario-row button { padding: 7px 10px; color: #9db2b9; border: 1px solid var(--line); border-radius: 999px; background: transparent; cursor: pointer; font-size: .68rem; }
.scenario-row button:hover { color: var(--cyan-soft); border-color: var(--line-hot); }
.console > label { display: block; margin-bottom: 8px; color: #c7d9de; font-size: .75rem; }
textarea {
  width: 100%;
  min-height: 150px;
  padding: 16px;
  resize: vertical;
  color: #eaf7f9;
  border: 1px solid var(--line);
  border-radius: 16px;
  outline: none;
  background: #06141d;
  line-height: 1.55;
}
textarea:focus { border-color: var(--line-hot); box-shadow: 0 0 0 3px rgba(112, 231, 255, .06); }
.upload-zone { position: relative; margin: 16px 0; padding: 18px; border: 1px dashed rgba(112, 231, 255, .27); border-radius: 16px; background: rgba(112, 231, 255, .025); }
.upload-zone input { position: absolute; opacity: 0; pointer-events: none; }
.upload-zone label { display: grid; cursor: pointer; }
.upload-zone label b { color: var(--cyan-soft); font-size: .82rem; }
.upload-zone label span, #file-summary { color: #718b94; font-size: .7rem; }
#file-summary { margin-top: 10px; }
.token-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 18px 0 8px; }
.token-metrics > div { min-height: 108px; padding: 14px; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 15px; background: rgba(112, 231, 255, .025); }
.token-metrics span { color: #69868f; font-size: .58rem; letter-spacing: .12em; }
.token-metrics strong { margin: 7px 0 4px; color: var(--cyan-soft); font: 400 1.85rem/1 var(--serif); }
.token-metrics small, .token-method { color: #718b94; font-size: .66rem; }
.token-method { margin: 0 0 14px; }
.console-actions { display: flex; gap: 9px; margin-top: 18px; }
.output-badge { padding: 5px 8px; color: var(--green); border: 1px solid rgba(120, 242, 180, .2); border-radius: 999px; }
pre {
  min-height: 510px;
  margin: 0;
  padding: 18px;
  overflow: auto;
  white-space: pre-wrap;
  color: #bdd1d6;
  border: 1px solid rgba(157, 218, 235, .08);
  border-radius: 17px;
  background: #030d13;
  font: 400 .75rem/1.65 ui-monospace, SFMono-Regular, Menlo, monospace;
}
.output-legend { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 16px; color: #6d8891; font-size: .65rem; }
.output-legend i { width: 6px; height: 6px; display: inline-block; margin-right: 5px; border-radius: 50%; }
.lab-note { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: center; }
.lab-note img { min-height: 420px; width: 100%; object-fit: cover; border: 1px solid var(--line); border-radius: 26px; }
.lab-note h2 { margin: 12px 0 16px; font: 400 clamp(2.7rem, 4.5vw, 4.6rem)/.95 var(--serif); }
.lab-note p { color: var(--muted); }

.footer { margin-top: 70px; padding: 38px 0 50px; border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: 1fr 1fr auto; gap: 30px; align-items: center; color: #6c858d; font-size: .75rem; }
.footer-brand { display: grid; }
.footer-brand b { color: var(--cyan-soft); font: 400 2.2rem/1 var(--serif); }
.footer-brand span { margin-top: 5px; }
.footer p { margin: 0; }
.footer nav { display: flex; gap: 14px; }
.footer nav a:hover { color: white; }

.reveal { opacity: 0; transform: translateY(20px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 1100px) {
  .hero-grid, .workflow, .boundary-grid, .lab-grid, .lab-note, .developer-contract, .developer-code-grid { grid-template-columns: 1fr; }
  .hero-grid { min-height: auto; }
  .hero-visual { min-height: 640px; }
  .prototype-grid, .proof-grid, .invariant-grid { grid-template-columns: repeat(2, 1fr); }
  .pipeline { grid-template-columns: 1fr; }
  .pipeline > i { transform: rotate(90deg); text-align: center; }
  .pipeline-node, .pipeline-node.core { min-height: 130px; }
  .contract-flow { grid-template-columns: 1fr; }
  .contract-flow > i { transform: rotate(90deg); text-align: center; }
  .contract-flow > div, .contract-flow > div.guard-node { min-height: 120px; }
  .track { grid-template-columns: 55px 1fr; }
  .track-visual, .track-image { grid-column: 2; }
}

@media (max-width: 760px) {
  .container { width: min(100% - 24px, 1280px); }
  .topbar { padding: 8px 0; }
  .nav-shell { min-height: 62px; }
  .brand small { display: none; }
  .menu-btn { display: block; }
  .nav-links {
    position: absolute;
    top: 82px;
    left: 12px;
    right: 12px;
    padding: 12px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    background: #07151e;
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
  }
  .nav-links.open { display: flex; }
  .nav-links .nav-cta { margin: 5px 0 0; text-align: center; }
  .hero { padding-top: 14px; }
  .hero-grid { display: flex; flex-direction: column; }
  .hero-copy { padding: 30px 22px; }
  .hero h1 { font-size: clamp(3.1rem, 15vw, 4.6rem); }
  .hero-proof, .prototype-grid, .proof-grid, .invariant-grid, .architecture-map, .section-heading, .page-hero-grid, .surface-grid { grid-template-columns: 1fr; }
  .hero-proof { gap: 8px; }
  .hero-visual { min-height: 510px; }
  .signal-card { min-width: 130px; padding: 10px; }
  .signal-b { top: 48%; }
  .section { padding: 58px 0; }
  .section-heading { gap: 16px; }
  .section-heading h2, .workflow h2, .boundary-copy h2, .cta-panel h2 { font-size: 3rem; }
  .prototype-card { min-height: 360px; }
  .card-icon { margin-top: 35px; }
  .workflow { padding: 24px; gap: 35px; }
  .developer-contract { padding: 24px; gap: 34px; }
  .flow-step.active { transform: none; }
  .vault { min-height: 380px; }
  .vault-ring { width: 320px; height: 320px; }
  .cta-panel { min-height: 400px; padding: 35px 20px; }
  .page-hero { padding-top: 48px; }
  .page-index { display: none; }
  .page-hero h1 { font-size: 3.7rem; }
  .comparison { grid-template-columns: 1fr; }
  .compare-arrow { transform: rotate(90deg); text-align: center; }
  .track { padding: 20px; grid-template-columns: 1fr; }
  .track-index { display: none; }
  .track-visual, .track-image { grid-column: 1; }
  .architecture-overlay { position: static; border-width: 1px 0 0; border-radius: 0; flex-direction: column; align-items: flex-start; }
  .console, .output-panel { min-height: 0; padding: 17px; }
  .token-metrics { grid-template-columns: 1fr; }
  pre { min-height: 420px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer nav { flex-wrap: wrap; }
}