:root {
  --background: #08090a;
  --surface: #101214;
  --foreground: #f2efe8;
  --muted: #a3a49f;
  --faint: #6b6e69;
  --primary: #c9a227;
  --primary-ink: #8a6a10;
  --paper: #f2efe8;
  --paper-ink: #111210;
  --paper-muted: #55564f;
  --border: rgba(242, 239, 232, 0.14);
  --border-soft: rgba(242, 239, 232, 0.07);
  --brass-soft: rgba(201, 162, 39, 0.12);
  --serif: "Instrument Serif", Georgia, serif;
  --sans: Inter, "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --pad: clamp(20px, 5vw, 72px);
  --max: 1360px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --radius: 6px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; background: var(--background); }
body { margin: 0; overflow-x: hidden; background: var(--background); color: var(--muted); font: 400 16px/1.6 var(--sans); -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
h1, h2, h3, p, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
h1, h2, h3 { color: var(--foreground); font-family: var(--serif); font-weight: 400; letter-spacing: -0.012em; word-spacing: 0.02em; text-wrap: balance; }
h1 em, h2 em, h3 em { color: var(--primary); font-style: italic; }
p { text-wrap: pretty; }
strong { color: var(--foreground); font-weight: 500; }
::selection { color: var(--background); background: var(--primary); }
:focus-visible { outline: 1px solid var(--primary); outline-offset: 4px; }
.nowrap { white-space: nowrap; }
.svg-defs { position: absolute; width: 0; height: 0; overflow: hidden; }
.page-noise { position: fixed; inset: 0; z-index: 60; pointer-events: none; opacity: 0.035; mix-blend-mode: screen; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.78' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"); }
.container { width: min(calc(100% - var(--pad) * 2), var(--max)); margin-inline: auto; }
.mark { width: 20px; height: 21px; color: var(--primary); flex: none; }

.eyebrow, .kicker { display: flex; align-items: center; gap: 14px; color: var(--primary); font: 11px/1.2 var(--mono); letter-spacing: 0.2em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 28px; height: 1px; background: currentColor; }

/* ---------- buttons ---------- */
.button { display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-height: 54px; padding: 0 28px; border: 1px solid transparent; border-radius: 999px; font: 500 14px/1 var(--sans); letter-spacing: 0.01em; white-space: nowrap; transition: background-color 0.35s var(--ease), color 0.35s var(--ease), border-color 0.35s var(--ease), transform 0.35s var(--ease); }
.button-primary { color: var(--background); background: var(--primary); }
.button-primary:hover { color: var(--background); background: var(--foreground); transform: translateY(-2px); }
.button-ghost { color: var(--foreground); border-color: var(--border); background: transparent; }
.button-ghost:hover { border-color: var(--primary); color: var(--primary); }
.button-block { width: 100%; }

/* ---------- header ---------- */
.header { position: fixed; inset: 0 0 auto; z-index: 50; border-bottom: 1px solid transparent; transition: background-color 0.4s, border-color 0.4s, backdrop-filter 0.4s; }
.header.scrolled { border-color: var(--border-soft); background: rgba(8, 9, 10, 0.78); backdrop-filter: blur(18px) saturate(1.2); -webkit-backdrop-filter: blur(18px) saturate(1.2); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.wordmark { display: inline-flex; align-items: center; gap: 12px; color: var(--foreground); font: 12px/1 var(--mono); letter-spacing: 0.18em; text-transform: uppercase; white-space: nowrap; }
.nav { display: flex; align-items: center; gap: clamp(20px, 2.6vw, 36px); font-size: 13px; }
.nav a { color: var(--muted); transition: color 0.2s; }
.nav a:hover { color: var(--foreground); }
.nav .nav-cta { padding: 10px 18px; border: 1px solid var(--border); border-radius: 999px; color: var(--foreground); transition: border-color 0.3s, color 0.3s; }
.nav .nav-cta:hover { border-color: var(--primary); color: var(--primary); }

/* ---------- hero ---------- */
.hero { position: relative; display: flex; flex-direction: column; justify-content: center; min-height: 100svh; padding: 128px 0 96px; overflow: hidden; isolation: isolate; }
.hero::before { content: ""; position: absolute; inset: 0; z-index: -2; background: radial-gradient(60% 70% at 78% 50%, rgba(201, 162, 39, 0.09), transparent 70%), var(--background); }
.hero-lines { position: absolute; inset: 0; z-index: -1; display: flex; justify-content: space-evenly; pointer-events: none; }
.hero-lines span { width: 1px; height: 100%; background: linear-gradient(to bottom, transparent, var(--border-soft) 20%, var(--border-soft) 80%, transparent); }
.hero-grid { display: flex; align-items: center; }
.hero-copy { max-width: 760px; }
.hero h1 { margin-top: 28px; font-size: clamp(54px, 7.2vw, 118px); line-height: 1.02; }
.hero-sub { max-width: 520px; margin-top: 32px; font-size: 18px; line-height: 1.65; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 44px; }
.scroll-cue { position: absolute; left: var(--pad); bottom: 32px; display: flex; align-items: center; gap: 14px; color: var(--faint); font: 10px var(--mono); letter-spacing: 0.22em; text-transform: uppercase; }
.scroll-cue span { position: relative; width: 1px; height: 40px; overflow: hidden; background: var(--border); }
.scroll-cue span::after { content: ""; position: absolute; left: 0; top: -40%; width: 1px; height: 40%; background: var(--primary); animation: cue 2.4s var(--ease) infinite; }
@keyframes cue { to { top: 100%; } }

/* ---------- gold rings (signature) ---------- */
.rings { --ring-size: clamp(820px, 92vw, 1380px); position: absolute; top: 50%; left: 78%; z-index: -1; width: var(--ring-size); height: var(--ring-size); overflow: visible; pointer-events: none; transform: translate(-50%, -50%) scale(0.92); opacity: 0; transition: opacity 2.4s var(--ease), transform 3s var(--ease); -webkit-mask-image: linear-gradient(90deg, transparent 4%, #000 46%); mask-image: linear-gradient(90deg, transparent 4%, #000 46%); }
.rings.in, html:not(.js) .rings { opacity: 1; transform: translate(-50%, -50%); }
.rings .stop-strong { stop-color: var(--primary); stop-opacity: 0.55; }
.rings .stop-mid { stop-color: var(--primary); stop-opacity: 0.14; }
.rings .stop-none { stop-color: var(--primary); stop-opacity: 0; }
.rings g, .ring-core { transform-box: view-box; transform-origin: 50% 50%; }
.ring-core { opacity: 0.5; animation: breathe 9s ease-in-out infinite; }
.band circle { stroke-width: 64; }
.band-a { opacity: 0.22; animation: spin 140s linear infinite; }
.band-b { opacity: 0.32; animation: spin 110s linear infinite reverse; }
.band-c { opacity: 0.42; animation: spin 90s linear infinite; }
.band-b circle { stroke-width: 54; }
.band-c circle { stroke-width: 40; }
.orbit-line { fill: none; stroke: var(--primary); stroke-width: 1; stroke-opacity: 0.38; stroke-dasharray: 86 14; stroke-linecap: round; }
.orbit-fine { stroke-opacity: 0.55; stroke-dasharray: 1 2.2; }
.orbit-dot { fill: var(--primary); filter: drop-shadow(0 0 10px rgba(201, 162, 39, 0.7)); }
.orbit-1 { animation: spin 120s linear infinite; }
.orbit-2 { animation: spin 84s linear infinite reverse; }
.orbit-3 { animation: spin 60s linear infinite; }
.orbit-4 { animation: spin 42s linear infinite reverse; }
.rings.paused g, .rings.paused .ring-core { animation-play-state: paused; }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes breathe { 50% { opacity: 0.85; transform: scale(1.06); } }

/* ---------- ticker ---------- */
.ticker { overflow: hidden; border-block: 1px solid var(--border-soft); background: var(--surface); }
.ticker-track { display: flex; width: max-content; animation: ticker 42s linear infinite; }
.ticker ul { display: flex; }
.ticker li { display: flex; align-items: center; gap: 40px; padding: 22px 0 22px 40px; color: var(--muted); font: italic 26px/1 var(--serif); white-space: nowrap; }
.ticker li::after { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--primary); }
@keyframes ticker { to { transform: translateX(-50%); } }

/* ---------- statement ---------- */
.statement { padding: clamp(110px, 14vw, 200px) 0; background: var(--paper); color: var(--paper-ink); }
.statement-grid { display: grid; grid-template-columns: minmax(160px, 0.3fr) minmax(0, 1.7fr); gap: clamp(32px, 6vw, 96px); }
.statement .eyebrow { align-self: start; padding-top: 18px; color: var(--primary-ink); }
.statement h2 { color: var(--paper-ink); font-size: clamp(48px, 7vw, 108px); line-height: 1.02; }
.statement h2 em { color: var(--primary-ink); }
.scrub-ready .w { opacity: 0.14; transition: opacity 0.45s var(--ease); }
.scrub-ready .w.lit { opacity: 1; }
.trio { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 72px; border-top: 1px solid rgba(17, 18, 16, 0.16); }
.trio div { padding: 22px 24px 0 0; }
.trio div + div { padding-left: 24px; border-left: 1px solid rgba(17, 18, 16, 0.12); }
.trio span { color: var(--paper-muted); font: 11px var(--mono); letter-spacing: 0.18em; text-transform: uppercase; }
.trio p { margin-top: 10px; color: var(--paper-ink); font: italic clamp(30px, 3.2vw, 44px)/1.1 var(--serif); }
.statement-sub { max-width: 560px; margin-top: 56px; color: var(--paper-muted); font-size: 18px; line-height: 1.7; }

/* ---------- model ---------- */
.model { padding: clamp(110px, 12vw, 180px) 0 clamp(60px, 8vw, 120px); }
.model-layout { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(48px, 8vw, 128px); }
.model-sticky { position: sticky; top: 120px; align-self: start; }
.model h2 { margin-top: 28px; font-size: clamp(52px, 6.4vw, 100px); line-height: 1; }
.model-note { max-width: 320px; margin-top: 28px; font-size: 16px; }
.model-index { position: relative; display: grid; gap: 4px; margin-top: 56px; padding-left: 26px; }
.model-index li { display: flex; align-items: baseline; gap: 18px; padding: 8px 0; color: var(--faint); font: 26px/1.2 var(--serif); transition: color 0.5s var(--ease), transform 0.5s var(--ease); }
.model-index li span { font: 11px var(--mono); letter-spacing: 0.14em; }
.model-index li.on { color: var(--foreground); transform: translateX(6px); }
.model-index li.on span { color: var(--primary); }
.model-progress { position: absolute; left: 0; width: 1px; height: 188px; margin-top: -188px; background: var(--border); }
.model-progress i { display: block; width: 1px; height: 100%; background: var(--primary); transform: scaleY(0.25); transform-origin: top; transition: transform 0.6s var(--ease); }
.model-sticky { padding-bottom: 4px; }
.stages { border-top: 1px solid var(--border); }
.stage { display: flex; flex-direction: column; justify-content: center; min-height: 72vh; padding: 64px 0; border-bottom: 1px solid var(--border); transition: opacity 0.6s var(--ease); }
.js .stage { opacity: 0.28; }
.js .stage.active { opacity: 1; }
.stage-num { color: var(--primary); font: 11px var(--mono); letter-spacing: 0.2em; text-transform: uppercase; }
.stage h3 { margin-top: 24px; font-size: clamp(72px, 9vw, 150px); line-height: 0.95; }
.stage > p:not(.stage-num) { max-width: 520px; margin-top: 28px; font-size: 18px; line-height: 1.7; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 32px; }
.tags li { padding: 8px 14px; border: 1px solid var(--border); border-radius: 999px; color: var(--muted); font: 11px var(--mono); letter-spacing: 0.08em; text-transform: uppercase; }

/* ---------- engineering ---------- */
.engineering { padding: clamp(110px, 12vw, 180px) 0; border-top: 1px solid var(--border-soft); }
.engineering-grid { display: grid; grid-template-columns: minmax(300px, 5fr) minmax(0, 7fr); gap: clamp(48px, 8vw, 128px); align-items: start; }
.definition { position: sticky; top: 120px; display: flex; flex-direction: column; min-height: 540px; padding: 40px; overflow: hidden; border: 1px solid var(--border); border-radius: calc(var(--radius) * 2); background: linear-gradient(160deg, var(--brass-soft), transparent 55%), var(--surface); }
.definition h3 { margin-top: 64px; font-size: clamp(52px, 5vw, 80px); line-height: 0.98; }
.phonetic { margin-top: 18px; color: var(--faint); font: 13px var(--mono); }
.phonetic i { color: var(--primary); font-family: var(--serif); font-size: 18px; }
.definition-body { position: relative; z-index: 1; max-width: 320px; margin-top: auto; padding-top: 48px; color: var(--muted); font-size: 16px; line-height: 1.7; }
.definition-mark { position: absolute; right: -70px; bottom: -80px; width: 300px; height: 314px; color: var(--primary); opacity: 0.08; }
.engineering-copy { padding-top: 12px; }
.engineering-copy h2 { font-size: clamp(52px, 6.2vw, 96px); line-height: 1.02; }
.engineering-copy > p { max-width: 540px; margin-top: 28px; font-size: 18px; line-height: 1.7; }
.systems { margin-top: 56px; border-top: 1px solid var(--border); }
.systems li { position: relative; display: grid; grid-template-columns: 64px 1fr; gap: 16px; padding: 28px 0; border-bottom: 1px solid var(--border); font-size: 17px; line-height: 1.6; transition: padding-left 0.45s var(--ease); }
.systems li::before { content: ""; position: absolute; left: 0; bottom: -1px; width: 0; height: 1px; background: var(--primary); transition: width 0.6s var(--ease); }
.systems li:hover { padding-left: 12px; }
.systems li:hover::before { width: 100%; }
.sys-num { padding-top: 5px; color: var(--primary); font: 11px var(--mono); letter-spacing: 0.14em; }

/* ---------- promise ---------- */
.promise { --p: 0.5; position: relative; display: flex; align-items: center; min-height: 100svh; padding: 120px 0; overflow: hidden; isolation: isolate; border-top: 1px solid var(--border-soft); }
.promise-ring { position: absolute; left: 50%; top: 50%; z-index: -1; width: min(92vw, 860px); height: auto; opacity: 0.55; transform: translate(-50%, -50%) rotate(calc((var(--p) - 0.5) * 50deg)) scale(calc(0.86 + var(--p) * 0.18)); }
.promise-arc { fill: none; stroke: var(--primary); stroke-width: 1.6; stroke-dasharray: 1; stroke-dashoffset: calc(1 - min(var(--p) * 1.6, 1)); vector-effect: non-scaling-stroke; }
.promise-dot { fill: var(--primary); opacity: calc(min(max((var(--p) - 0.5) * 4, 0), 1)); }
.promise-inner { display: flex; flex-direction: column; align-items: center; text-align: center; }
.promise h2 { max-width: 1180px; margin-top: 36px; font-size: clamp(60px, 9.4vw, 160px); line-height: 1; }

/* ---------- contact ---------- */
.contact { padding: clamp(110px, 12vw, 180px) 0; background: var(--surface); border-top: 1px solid var(--border-soft); }
.contact-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(320px, 5fr); gap: clamp(48px, 7vw, 112px); align-items: center; }
.contact h2 { margin-top: 32px; font-size: clamp(52px, 6.4vw, 104px); line-height: 1.04; }
.contact-answer { margin-top: 32px; color: var(--primary); font: italic clamp(32px, 3.6vw, 54px)/1.15 var(--serif); }
.contact-card { display: flex; flex-direction: column; padding: clamp(28px, 3vw, 44px); border: 1px solid var(--border); border-radius: calc(var(--radius) * 2); background: var(--background); }
.contact-card > p { font-size: 17px; line-height: 1.7; }
.contact-row { display: flex; flex-direction: column; gap: 8px; padding: 24px 0; border-bottom: 1px solid var(--border); transition: border-color 0.3s; }
.contact-row:first-of-type { margin-top: 20px; }
.contact-row:hover { border-color: var(--primary); }
.contact-label { color: var(--faint); font: 10px var(--mono); letter-spacing: 0.2em; text-transform: uppercase; }
.contact-value { color: var(--foreground); font: clamp(24px, 2.4vw, 32px)/1.2 var(--serif); overflow-wrap: anywhere; transition: color 0.3s; }
.contact-row:hover .contact-value { color: var(--primary); }
.contact-card .button { margin-top: 32px; }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--border); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-block: 32px; }
.footer-nav { display: flex; gap: 28px; font-size: 13px; }
.footer-nav a { color: var(--muted); transition: color 0.2s; }
.footer-nav a:hover { color: var(--foreground); }
.footer-copy { color: var(--faint); font: 11px var(--mono); letter-spacing: 0.14em; text-transform: uppercase; }

/* ---------- motion ---------- */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }
.hero .reveal:nth-child(2) { transition-delay: 0.08s; }
.hero .reveal:nth-child(3) { transition-delay: 0.16s; }
.hero .reveal:nth-child(4) { transition-delay: 0.24s; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .hero { min-height: auto; padding: 136px 0 104px; }
  .rings { --ring-size: 760px; top: 30%; left: 92%; -webkit-mask-image: linear-gradient(90deg, transparent 10%, #000 60%); mask-image: linear-gradient(90deg, transparent 10%, #000 60%); }
  .model-layout, .engineering-grid, .contact-grid { grid-template-columns: 1fr; }
  .model-sticky { position: relative; top: auto; }
  .model-index, .model-progress { display: none; }
  .stage { min-height: auto; padding: 56px 0; }
  .js .stage { opacity: 1; }
  .definition { position: relative; top: auto; min-height: 440px; }
}
@media (max-width: 700px) {
  .nav a:not(.nav-cta) { display: none; }
  .nav .nav-cta { padding: 9px 14px; font-size: 12px; }
  .hero h1 { font-size: clamp(48px, 13.5vw, 80px); line-height: 1.04; }
  .hero-sub { font-size: 17px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .scroll-cue { display: none; }
  .ticker li { font-size: 21px; padding-block: 18px; }
  .statement-grid { grid-template-columns: 1fr; }
  .statement .eyebrow { padding-top: 0; }
  .trio { grid-template-columns: 1fr; margin-top: 48px; }
  .trio div, .trio div + div { display: flex; align-items: baseline; justify-content: space-between; padding: 18px 0; border-left: 0; border-bottom: 1px solid rgba(17, 18, 16, 0.12); }
  .trio p { margin-top: 0; }
  .systems li { grid-template-columns: 44px 1fr; padding: 22px 0; font-size: 16px; }
  .definition { min-height: 400px; padding: 28px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 380px) {
  .wordmark span { letter-spacing: 0.12em; }
  .nav .nav-cta { padding: 8px 12px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .ticker-track { animation: none; }
  .rings g, .ring-core { animation: none !important; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}