:root {
  --ink: #000;
  --ink-2: #050505;
  --bone: #ECE6DA;
  --bone-2: #C9C2B6;
  --stone: #9A938A;
  --dim: #7D776F;
  --gold: #D6B27A;
  --line: rgba(236, 230, 218, 0.1);
  --line-2: rgba(236, 230, 218, 0.3);
  --display: "Michroma", sans-serif;
  --sans: "Instrument Sans", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --gutter: clamp(16px, 6.6vw, 96px);
  --ease: cubic-bezier(.2, .7, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--ink); scrollbar-color: #2a2826 #000; }
body {
  margin: 0;
  background: var(--ink);
  color: var(--bone);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
:focus-visible { outline: 1.5px solid var(--gold); outline-offset: 4px; border-radius: 4px; }
.gold-t { color: var(--gold); fill: var(--gold); }

/* ---------- nav ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 20px var(--gutter);
  transition: background .4s var(--ease), border-color .4s var(--ease), padding .4s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
  padding-block: 14px;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand img { width: 32px; height: 32px; border-radius: 50%; }
.brand span { font-family: var(--display); font-size: 13px; letter-spacing: .45em; }
.nav-links { display: flex; gap: 40px; margin-left: auto; margin-right: 16px; }
.nav-links a { color: var(--stone); text-decoration: none; font-size: 15px; transition: color .2s; }
.nav-links a:hover { color: var(--bone); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 28px; border-radius: 999px;
  font: 600 16px/1 var(--sans); text-decoration: none;
  transition: background .2s, color .2s, border-color .2s;
}
.btn-solid { background: var(--bone); color: #000; }
.btn-solid:hover { background: #fff; }
.btn-ghost { color: var(--bone); border: 1px solid var(--line-2); font-weight: 500; }
.btn-ghost:hover { border-color: var(--bone); }
.btn-sm { min-height: 44px; padding: 0 20px; font-size: 15px; }

/* ---------- hero ---------- */
.hero {
  position: relative; min-height: 100svh;
  display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center;
  padding: 104px var(--gutter) 120px;
}
.hero-art {
  position: relative; max-width: 100%; aspect-ratio: 5 / 2;
  width: clamp(320px, calc((100svh - 430px) * 2.5), 960px);
}
.hero-art::before {
  content: ""; position: absolute; inset: -10% 15%; z-index: -1;
  background: radial-gradient(closest-side, rgba(214, 178, 122, .09), transparent);
}
.hero-art img {
  width: 100%; height: 100%; object-fit: cover;
  -webkit-mask-image: radial-gradient(ellipse 50% 50% at 50% 50%, #000 62%, transparent 100%);
  mask-image: radial-gradient(ellipse 50% 50% at 50% 50%, #000 62%, transparent 100%);
  animation: art-in 1.8s var(--ease) both;
}
.scan {
  position: absolute; left: 20%; right: 20%; top: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(236, 230, 218, .7) 50%, transparent);
  box-shadow: 0 0 18px 2px rgba(214, 178, 122, .35);
  opacity: 0;
  animation: scan 2.2s .3s var(--ease) both;
}
@keyframes art-in { from { opacity: 0; filter: blur(8px) brightness(.4); transform: scale(1.03); } to { opacity: 1; filter: none; transform: none; } }
@keyframes scan { 0% { top: 0; opacity: 0; } 10% { opacity: 1; } 90% { opacity: .8; } 100% { top: 100%; opacity: 0; } }

.wordmark {
  margin: 28px 0 0; padding-left: .55em;
  font: 400 clamp(34px, 4.4vw, 58px)/1 var(--display);
  letter-spacing: .55em;
}
.lede { margin: 26px 0 0; max-width: 600px; font-size: clamp(17px, 1.6vw, 21px); line-height: 1.55; color: var(--bone-2); }
.actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; margin: 36px 0 0; }
.hero .lede, .hero .actions { animation: rise 1s var(--ease) both; }
.hero .lede { animation-delay: .9s; }
.hero .actions { animation-delay: 1.05s; }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

.scroll-cue { position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 10px; }
.scroll-cue .stem { width: 1px; height: 36px; background: var(--line-2); transform-origin: top; animation: stem 1.2s 1.4s var(--ease) both; }
.scroll-cue i { display: block; border-radius: 50%; background: var(--bone); animation: drip 2.4s ease-in-out infinite; }
.scroll-cue i:nth-of-type(1) { width: 7px; height: 7px; }
.scroll-cue i:nth-of-type(2) { width: 5px; height: 5px; animation-delay: .2s; }
.scroll-cue i:nth-of-type(3) { width: 4px; height: 4px; animation-delay: .4s; }
.scroll-cue i:nth-of-type(4) { width: 3px; height: 3px; animation-delay: .6s; }
@keyframes stem { from { transform: scaleY(0); } to { transform: none; } }
@keyframes drip { 0%, 100% { opacity: .15; } 30% { opacity: 1; } }

/* ---------- sections ---------- */
.section { display: flex; flex-direction: column; align-items: center; text-align: center; padding: clamp(88px, 10vw, 136px) var(--gutter); }
.section.band { background: var(--ink-2); border-block: 1px solid var(--line); }
.section.rule { border-top: 1px solid var(--line); }
.section h2, .footer h2 {
  margin: 0; max-width: 900px;
  font: 400 clamp(26px, 3.4vw, 40px)/1.4 var(--display);
  text-wrap: balance;
}
.sub, .lede { text-wrap: pretty; }
.section .h-plain { margin-top: 32px; font: 500 clamp(20px, 2.2vw, 26px)/1.4 var(--sans); }
.sub { margin: 18px 0 0; max-width: 620px; font-size: clamp(16px, 1.5vw, 19px); line-height: 1.6; color: var(--stone); }
.fine { margin: 40px 0 0; font-size: 14px; color: var(--dim); }
.legend { display: flex; align-items: center; justify-content: center; gap: 12px; margin: 32px 0 0; font-size: 15px; color: var(--stone); }
.pip { width: 8px; height: 8px; border-radius: 50%; background: var(--gold); flex: none; }

/* ---------- ring ---------- */
.loop-grid {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 360px); align-items: center;
  gap: clamp(40px, 6vw, 96px); width: min(1180px, 100%); margin-top: 48px;
}
.ring { display: block; width: 100%; max-width: calc((100svh - 320px) * 1.1); height: auto; justify-self: center; overflow: visible; }
.ring .draw, .ring .fade { fill: none; }
.ring .dot { fill: #000; stroke: var(--bone); stroke-width: 1.5; }
.ring .hot .dot { stroke: var(--gold); }
.ring .halo { fill: var(--bone); opacity: 0; }
.ring .hot .halo { fill: var(--gold); }
.ring .gold { stroke: var(--gold); }
.t-stage { font: 15px var(--display); letter-spacing: 4px; fill: var(--bone); }
.t-sub { font: 15px var(--sans); fill: var(--stone); }
.ring .t-sub.gold-t, .ring .t-stage.gold-t { fill: var(--gold); }

.orbiter { transform-box: view-box; transform-origin: 440px 400px; animation: orbit 16s linear infinite; }
.stage .halo { animation: hit 16s linear infinite; }
.s1 .halo { animation-delay: 3.2s; }
.s2 .halo { animation-delay: 6.4s; }
.s3 .halo { animation-delay: 9.6s; }
.s4 .halo { animation-delay: 12.8s; }
.core { animation: core 3.2s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
@keyframes orbit { to { transform: rotate(360deg); } }
@keyframes hit { 0% { opacity: .35; } 8% { opacity: 0; } 100% { opacity: 0; } }
@keyframes core { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }

.steps {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: minmax(0, 1fr); gap: 22px; text-align: left;
}
.steps li { border-top: 1px solid var(--line-2); padding-top: 16px; display: flex; flex-direction: column; gap: 8px; }
.steps li.hot { border-top-color: var(--gold); }
.step-name { font: 13px var(--display); letter-spacing: .3em; }
.steps .hot .step-name { color: var(--gold); }
.steps p { margin: 0; font-size: 15px; line-height: 1.6; color: var(--stone); }

/* ---------- terminals ---------- */
.terms { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; width: min(1180px, 100%); margin-top: 48px; text-align: left; }
.term { margin: 0; border: 1px solid rgba(236, 230, 218, .16); border-radius: 16px; background: #000; overflow: hidden; }
.term-warm { border-color: rgba(214, 178, 122, .5); }
.term figcaption { display: flex; justify-content: space-between; gap: 16px; padding: 18px 26px; border-bottom: 1px solid var(--line); font-size: 15px; }
.term figcaption span:last-child { font-size: 14px; color: var(--stone); }
.term figcaption .gold-t { color: var(--gold); }
.term-warm figcaption { border-bottom-color: rgba(214, 178, 122, .2); }
.term-body { padding: 30px 28px 34px; font: 14px/1.85 var(--mono); color: var(--stone); min-height: 100%; overflow-x: auto; }
.ln { white-space: pre; }
.ln.gap { height: 14px; }
.ln em { font-style: normal; display: inline-block; width: 9ch; }
.ln b { font-weight: 400; color: var(--bone); }
.ln.cmd { color: var(--bone); white-space: pre-wrap; }
.ln.g { color: var(--gold); }
.ln.w { color: var(--bone); }
.caret { display: inline-block; width: .6em; height: 1.1em; margin-left: 2px; vertical-align: -.2em; background: var(--bone); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.js .terms:not(.played) .ln:not(.cmd) { visibility: hidden; }
.js .terms .ln.pending { visibility: hidden; }

/* ---------- architecture ---------- */
.arch-scroll { scrollbar-width: thin; scrollbar-color: rgba(236, 230, 218, .25) transparent; width: min(1180px, 100%, calc((100svh - 300px) * 2.13)); margin-top: 48px; overflow-x: auto; overscroll-behavior-x: contain; }
.arch { display: block; width: 100%; min-width: 900px; height: auto; }
.arch .edges path { fill: none; stroke: rgba(236, 230, 218, .35); stroke-width: 1.3; }
.edge-labels text { font: 14px var(--sans); fill: var(--dim); }
.edge-labels .gold-t { fill: var(--gold); }
.nodes rect { fill: #000; stroke: rgba(236, 230, 218, .5); }
.nodes text { font: 16px var(--sans); fill: var(--bone); text-anchor: middle; }
.nodes .hot rect { stroke: var(--gold); }
.nodes .hot text { fill: var(--gold); }
.nodes .solid rect { fill: var(--bone); stroke: var(--bone); }
.nodes .solid text { fill: #000; }
.nodes .llm { fill: var(--gold); }
.packets { opacity: 0; transition: opacity .6s 1.6s; }
.arch.in .packets { opacity: 1; }

.agents { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 56px 64px; width: min(1248px, 100%); margin-top: 96px; text-align: left; }
.agents h3 { margin: 0 0 10px; font: 600 18px/1.4 var(--sans); }
.agents h3.gold-t { color: var(--gold); }
.agents p { margin: 0; font-size: 16px; line-height: 1.65; color: var(--stone); }
.stack { list-style: none; margin: 120px 0 0; padding: 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 20px 56px; font: 13px var(--display); letter-spacing: .25em; color: var(--dim); }

/* ---------- draw-on-reveal (ring + arch) ---------- */
.js [data-reveal] .draw { stroke-dasharray: 1; stroke-dashoffset: 1; transition: stroke-dashoffset 1.6s var(--ease); }
.js [data-reveal] .fade { opacity: 0; transition: opacity 1s .8s; }
.js [data-reveal] .nodes g, .js [data-reveal] .labels, .js [data-reveal] .edge-labels { opacity: 0; transition: opacity .8s .5s; }
.js [data-reveal].in .draw { stroke-dashoffset: 0; }
.js [data-reveal].in .fade, .js [data-reveal].in .nodes g, .js [data-reveal].in .labels, .js [data-reveal].in .edge-labels { opacity: 1; }
.js .arch.in .nodes g:nth-child(2) { transition-delay: .6s; }
.js .arch.in .nodes g:nth-child(n+3) { transition-delay: .8s; }
.js .arch.in .nodes g:nth-child(n+5) { transition-delay: 1s; }
.js .arch.in .nodes g:nth-child(n+9) { transition-delay: 1.2s; }

/* ---------- architecture, phone layout ---------- */
.flow { display: none; flex-direction: column; align-items: center; width: 100%; margin-top: 44px; }
.f-node {
  position: relative; min-width: 190px; padding: 13px 22px;
  background: #000; border: 1px solid rgba(236, 230, 218, .5); border-radius: 10px;
  font-size: 15px; line-height: 1.3; text-align: center;
}
.f-node.llm::after { content: ""; position: absolute; top: 7px; right: 7px; width: 6px; height: 6px; border-radius: 50%; background: var(--gold); }
.f-node.hot { border-color: var(--gold); color: var(--gold); }
.f-node.dim { border-style: dashed; color: var(--bone-2); }
.f-node.solid { background: var(--bone); border-color: var(--bone); color: #000; }
.f-link { position: relative; display: block; width: 1px; height: 38px; background: rgba(236, 230, 218, .35); }
.f-link.gold { background: rgba(214, 178, 122, .7); }
.f-link em { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); font-style: normal; font-size: 13px; white-space: nowrap; color: var(--dim); }
.f-link.gold em { color: var(--gold); }
.f-link::after {
  content: ""; position: absolute; left: -2.5px; top: 0; width: 6px; height: 6px; border-radius: 50%;
  background: var(--bone); opacity: 0; animation: drop 2.8s linear infinite;
}
.f-link.gold::after { background: var(--gold); }
.flow .f-link:nth-of-type(2)::after { animation-delay: .5s; }
.flow .f-link:nth-of-type(3)::after { animation-delay: 1s; }
.flow .f-link:nth-of-type(4)::after { animation-delay: 1.5s; }
.flow .f-link:nth-of-type(5)::after { animation-delay: 2s; }
@keyframes drop { 0% { top: -3px; opacity: 0; } 15%, 80% { opacity: 1; } 100% { top: calc(100% - 3px); opacity: 0; } }
.f-fork { position: relative; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; width: 100%; max-width: 380px; padding-top: 18px; }
.f-fork::before { content: ""; position: absolute; top: 0; left: 16.66%; right: 16.66%; height: 1px; background: rgba(236, 230, 218, .35); }
.f-fork .f-node { min-width: 0; padding: 12px 4px; font-size: 14px; }
.f-fork .f-node::before { content: ""; position: absolute; top: -19px; left: 50%; width: 1px; height: 18px; background: rgba(236, 230, 218, .35); }
.f-note, .f-cap { margin: 12px 0 0; font-size: 13px; line-height: 1.5; color: var(--dim); max-width: 320px; }
.f-sub {
  position: relative; display: flex; flex-direction: column; gap: 0; width: 100%; max-width: 380px;
  padding: 40px 16px 18px; border: 1px dashed rgba(214, 178, 122, .45); border-radius: 16px;
}
.f-sub-label { position: absolute; top: 13px; left: 16px; font-size: 12px; color: var(--gold); }
.f-sub .f-cap { margin: 10px 0 18px; max-width: none; text-align: center; }
.f-sub .f-cap:last-child { margin-bottom: 0; }
.f-pair { display: flex; align-items: center; gap: 10px; }
.f-pair .f-node { flex: 1; min-width: 0; padding-inline: 8px; }
.f-swap { position: relative; flex: none; width: 34px; height: 12px; }
.f-swap::before, .f-swap::after { content: ""; position: absolute; left: 0; right: 0; height: 1px; background: var(--gold); }
.f-swap::before { top: 2px; } .f-swap::after { bottom: 2px; opacity: .5; }
.f-loop { margin: 22px 0 0; padding: 10px 18px; border: 1px dashed var(--line-2); border-radius: 999px; font-size: 13px; color: var(--stone); }
.js .flow > * { opacity: 0; transform: translateY(6px); transition: opacity .5s, transform .5s var(--ease); }
.js .flow.in > * { opacity: 1; transform: none; }
.js .flow.in > :nth-child(2) { transition-delay: 0.07s; }
.js .flow.in > :nth-child(3) { transition-delay: 0.14s; }
.js .flow.in > :nth-child(4) { transition-delay: 0.21s; }
.js .flow.in > :nth-child(5) { transition-delay: 0.28s; }
.js .flow.in > :nth-child(6) { transition-delay: 0.35s; }
.js .flow.in > :nth-child(7) { transition-delay: 0.42s; }
.js .flow.in > :nth-child(8) { transition-delay: 0.49s; }
.js .flow.in > :nth-child(9) { transition-delay: 0.56s; }
.js .flow.in > :nth-child(10) { transition-delay: 0.63s; }
.js .flow.in > :nth-child(11) { transition-delay: 0.70s; }
.js .flow.in > :nth-child(12) { transition-delay: 0.77s; }
.js .flow.in > :nth-child(13) { transition-delay: 0.84s; }
.js .flow.in > :nth-child(14) { transition-delay: 0.91s; }
.js .flow.in > :nth-child(15) { transition-delay: 0.98s; }
.js .flow.in > :nth-child(16) { transition-delay: 1.05s; }

/* ---------- vault ---------- */
.big-num { font: 400 clamp(80px, 10vw, 120px)/1 var(--display); font-variant-numeric: tabular-nums; }
.sigs {
  list-style: none; margin: 80px 0 0; padding: 0; width: min(1248px, 100%);
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px 40px;
  text-align: left; font: 14px var(--mono); color: #8A847B;
}
.sigs li { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sigs b { font-weight: 400; color: var(--bone); }
.sigs .web b { color: var(--gold); }
.js .sigs li { opacity: 0; transition: opacity .4s; }
.js .sigs li.on { opacity: 1; }

/* ---------- evals ---------- */
.evals { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 48px; width: min(1180px, 100%); margin-top: 64px; text-align: left; }
.eval { display: flex; flex-direction: column; gap: 14px; border-top: 1px solid var(--line-2); padding-top: 22px; }
.eval.lead { border-top-color: var(--gold); }
.eval-label { font-size: 15px; color: var(--stone); }
.eval-num { font: 400 clamp(40px, 4vw, 56px)/1 var(--display); font-variant-numeric: tabular-nums; }
.eval-num small { font-size: .42em; margin-left: 4px; color: var(--stone); }
.eval-was { font: 13px var(--mono); color: var(--dim); }
.bar { position: relative; display: block; height: 3px; margin: 4px 0; border-radius: 2px; background: rgba(236, 230, 218, .1); }
.bar i { position: absolute; top: 0; bottom: 0; left: 0; border-radius: 2px; }
.bar .b1 { width: calc(var(--v) * 100%); background: var(--gold); }
/* "before" is a tick mark on the track, drawn above the fill */
.bar .b0 { left: calc(var(--v) * 100%); top: -4px; bottom: -4px; width: 1.5px; background: var(--bone); z-index: 1; }
.js .evals .b1 { transform: scaleX(0); transform-origin: left; transition: transform 1.6s var(--ease) .3s; }
.js .evals.in .b1 { transform: none; }

/* ---------- footer ---------- */
.footer { display: flex; flex-direction: column; align-items: center; text-align: center; padding: 160px var(--gutter) 96px; border-top: 1px solid var(--line); }
.footer img { width: 200px; height: 200px; object-fit: cover; }
.footer h2 { margin-top: 48px; font-size: clamp(24px, 3vw, 34px); }
.quick {
  margin: 40px 0 0; max-width: 100%; overflow-x: auto; text-align: left;
  font: 15px/2 var(--mono); color: var(--bone-2);
  background: var(--ink-2); border: 1px solid rgba(236, 230, 218, .16); border-radius: 14px; padding: 26px 36px;
}
.quick .c { color: var(--dim); }
.footer .btn { margin-top: 48px; }
.footer .fine { margin-top: 96px; }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .loop-grid { grid-template-columns: minmax(0, 1fr); }
  .ring { max-width: 620px; }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 40px; }
  .terms { grid-template-columns: minmax(0, 1fr); }
  .agents, .sigs, .evals { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
  .nav { padding-block: 16px; }
  .nav-links { display: none; }
  .hero { padding-top: 88px; padding-bottom: 104px; }
  .hero-art { width: 100%; aspect-ratio: 4 / 3; }
  .wordmark { margin-top: 20px; letter-spacing: .4em; padding-left: .4em; }
  .actions { flex-direction: column; align-items: stretch; width: min(100%, 300px); }
  .section { padding-block: 88px; }
  .steps, .agents, .sigs { grid-template-columns: minmax(0, 1fr); }
  .steps { gap: 22px; }
  .t-stage { font-size: 26px; letter-spacing: 2px; }
  .t-sub { font-size: 24px; }
  .agents { gap: 32px; margin-top: 72px; }
  .term-body { padding: 20px 16px 24px; font-size: 12px; overflow-x: hidden; }
  .ln:not(.cmd):not(.gap) { white-space: pre-wrap; padding-left: 9ch; text-indent: -9ch; }
  .term figcaption { padding: 14px 16px; }
  .arch-scroll { display: none; }
  .flow { display: flex; }
  .legend { text-align: left; font-size: 14px; }
  .sigs { margin-top: 56px; gap: 14px; font-size: 13px; }
  .sigs li:nth-child(n+11) { display: none; }
  .evals { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 36px 20px; }
  .eval-num { font-size: 38px; }
  .eval-label { font-size: 14px; min-height: 2.9em; }
  .stack { gap: 14px 24px; margin-top: 72px; letter-spacing: .18em; font-size: 12px; }
  .footer { padding-top: 104px; }
  .footer img { width: 140px; height: 140px; }
  .quick { width: 100%; font-size: 12px; padding: 18px; white-space: pre-wrap; overflow-wrap: anywhere; }
  .footer .fine { margin-top: 64px; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .scan, .packets { display: none; }
}