/* =========================================================
   BrixTwin — marketing site
   Colour carries meaning throughout:
     amber  = the physical world
     cyan   = its digital twin
     violet = Brix AI
   ========================================================= */

:root {
  --bg: #04060c;
  --bg-2: #070b16;
  --surface: #0b1222;
  --surface-2: #111a2f;
  --line: rgba(130, 170, 255, 0.10);
  --line-2: rgba(130, 170, 255, 0.18);
  --text: #eaf1ff;
  --text-2: #a3b3cf;
  --text-3: #6a7a96;

  --phys: #ff8a4c;
  --phys-dark: #c25426;
  --twin: #3ad8ff;
  --twin-dim: rgba(58, 216, 255, 0.12);
  --ai: #9b7bff;
  --ai-dim: rgba(155, 123, 255, 0.14);
  --ok: #34e3a0;
  --warn: #ffc35c;
  --bad: #ff5f7a;

  --grad: linear-gradient(100deg, var(--twin) 0%, #7fb6ff 45%, var(--ai) 100%);
  --grad-ai: linear-gradient(100deg, #c2b0ff 0%, var(--ai) 50%, #ff8fd8 100%);

  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 40px 100px -40px rgba(0, 0, 0, 0.85);

  --font-head: "Sora", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 { font-family: var(--font-head); line-height: 1.1; margin: 0 0 .5em; letter-spacing: -0.025em; }
h1 { font-size: clamp(2.6rem, 5.4vw, 4.6rem); font-weight: 600; }
.nowrap { white-space: nowrap; }
h2 { font-size: clamp(1.9rem, 3.6vw, 3rem); font-weight: 600; }
h3 { font-size: 1.12rem; font-weight: 600; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
a { color: inherit; text-decoration: none; }
img, svg, canvas { display: block; max-width: 100%; }
b, strong { font-weight: 600; }

.container { width: min(1240px, 100% - 32px); margin-inline: auto; }
.mono { font-family: var(--font-mono); }
.muted { color: var(--text-3); }
.lead { color: var(--text-2); font-size: clamp(1rem, 1.3vw, 1.12rem); max-width: 62ch; }
.grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.grad--ai { background: var(--grad-ai); -webkit-background-clip: text; background-clip: text; }

.skip { position: absolute; left: -999px; top: 8px; background: var(--twin); color: #000; padding: 8px 12px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }
:focus-visible { outline: 2px solid var(--twin); outline-offset: 3px; border-radius: 6px; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font: 500 .76rem/1 var(--font-mono);
  text-transform: uppercase; letter-spacing: .14em;
  color: var(--twin); margin-bottom: 1.1rem;
}
.eyebrow--ai { color: var(--ai); }
.pip { width: 8px; height: 8px; border-radius: 2px; display: inline-block; flex: none; }
.pip--phys { background: var(--phys); }
.pip--twin { background: transparent; border: 1.5px solid var(--twin); }
.pip--ai { background: var(--ai); border-radius: 50%; box-shadow: 0 0 10px var(--ai); }
.spark { width: 14px; height: 14px; fill: currentColor; flex: none; }

/* ---------- Buttons ---------- */
.btn {
  --h: 50px;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: var(--h); padding: 0 24px; border-radius: 999px; border: 1px solid transparent;
  font: 600 .95rem/1 var(--font-body); cursor: pointer; white-space: nowrap;
  transition: transform .15s ease, background .2s, border-color .2s, box-shadow .25s, color .2s;
}
.btn:active { transform: translateY(1px); }
.btn--sm { --h: 40px; padding: 0 18px; font-size: .88rem; }
.btn--block { width: 100%; }
.btn--primary {
  color: #03121a;
  background: linear-gradient(100deg, #6fe6ff, var(--twin) 40%, #8fa8ff);
  box-shadow: 0 10px 30px -10px rgba(58, 216, 255, .6), inset 0 1px 0 rgba(255,255,255,.4);
}
.btn--primary:hover { box-shadow: 0 14px 40px -10px rgba(58, 216, 255, .8), inset 0 1px 0 rgba(255,255,255,.5); }
.btn--ghost { background: rgba(11,18,34,.5); color: var(--text); border-color: var(--line-2); backdrop-filter: blur(8px); }
.btn--ghost:hover { border-color: var(--ai); color: #fff; box-shadow: 0 0 0 4px var(--ai-dim); }
.btn--ghost .spark { color: var(--ai); }

.link { color: var(--twin); font-weight: 600; }
.link:hover { text-decoration: underline; text-underline-offset: 3px; }

/* ---------- Nav ---------- */
.nav { position: fixed; inset: 0 0 auto 0; z-index: 50; transition: background .3s, border-color .3s, backdrop-filter .3s; border-bottom: 1px solid transparent; }
.nav.is-scrolled { background: rgba(4, 6, 12, .72); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-bottom-color: var(--line); }
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand__mark { width: 32px; height: 32px; }
.brand__name { font: 600 1.25rem/1 var(--font-head); letter-spacing: -.02em; }
.brand__name b { color: var(--twin); font-weight: 600; }
.nav__links { display: flex; gap: 26px; }
.nav__links a { color: var(--text-2); font-size: .92rem; font-weight: 500; transition: color .2s; }
.nav__links a:hover { color: var(--text); }
.nav__links .nav__cta-mobile { display: none; }
.nav__actions { display: flex; align-items: center; gap: 12px; }
.nav__toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line-2); border-radius: 12px; background: rgba(11,18,34,.6); cursor: pointer; position: relative; }
.nav__toggle span { position: absolute; left: 12px; right: 12px; height: 2px; background: var(--text); border-radius: 2px; transition: transform .25s, top .25s; }
.nav__toggle span:first-child { top: 16px; }
.nav__toggle span:last-child { top: 24px; }
.nav__toggle[aria-expanded="true"] span:first-child { top: 20px; transform: rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:last-child { top: 20px; transform: rotate(-45deg); }

@media (max-width: 980px) {
  .nav__toggle { display: block; }
  .nav__actions .btn { display: none; }
  .nav__links {
    position: fixed; inset: 72px 0 auto 0; flex-direction: column; gap: 2px;
    padding: 16px; background: rgba(7, 11, 22, .97); border-bottom: 1px solid var(--line);
    transform: translateY(-8px); opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s;
  }
  .nav__links.is-open { transform: none; opacity: 1; pointer-events: auto; }
  .nav__links a { padding: 12px 8px; font-size: 1rem; }
  .nav__links .nav__cta-mobile { display: inline-flex; margin-top: 8px; color: #03121a; }
  .nav { background: rgba(4, 6, 12, .8); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
}

/* ---------- Hero ---------- */
.hero { position: relative; min-height: max(720px, 100svh); display: flex; align-items: center; overflow: hidden; isolation: isolate; }
.hero__stage { position: absolute; inset: 0; z-index: -2; }
#heroCanvas { width: 100%; height: 100%; display: block; }
.hero__fallback { display: none; position: absolute; inset: 0;
  background: radial-gradient(ellipse 50% 50% at 70% 50%, rgba(58,216,255,.18), transparent 70%),
              radial-gradient(ellipse 30% 30% at 60% 60%, rgba(155,123,255,.18), transparent 70%); }
.hero__stage.no-webgl .hero__fallback { display: block; }
.hero__stage.no-webgl canvas { display: none; }
.hero__scrim { position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background:
    linear-gradient(90deg, rgba(4,6,12,.92) 0%, rgba(4,6,12,.6) 34%, rgba(4,6,12,0) 58%),
    linear-gradient(0deg, var(--bg) 0%, rgba(4,6,12,0) 22%),
    linear-gradient(180deg, rgba(4,6,12,.7) 0%, rgba(4,6,12,0) 18%); }

.hero__inner { position: relative; display: grid; grid-template-columns: minmax(0, 560px) 1fr; gap: 40px; padding: 120px 0 96px; align-items: end; min-height: inherit; pointer-events: none; }
.hero__copy, .hero__hud { pointer-events: auto; }
.hero__copy { align-self: center; }
.hero__copy h1 { margin-bottom: .4em; text-shadow: 0 2px 40px rgba(4,6,12,.6); }
.hero__ctas { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 32px; }
.hero__chips-legend { list-style: none; padding: 0; margin: 0; display: flex; gap: 20px; flex-wrap: wrap; font: .78rem var(--font-mono); color: var(--text-3); }
.hero__chips-legend li { display: inline-flex; align-items: center; gap: 8px; }

.hero__hud { justify-self: end; width: min(440px, 100%); display: grid; gap: 14px; }
.insight {
  padding: 14px 16px; border-radius: 14px;
  background: linear-gradient(180deg, rgba(25, 18, 52, .78), rgba(11, 12, 30, .78));
  border: 1px solid rgba(155, 123, 255, .35);
  box-shadow: 0 20px 60px -20px rgba(155, 123, 255, .45);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
}
.insight__head { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 8px; font-size: .72rem; }
.insight__badge { display: inline-flex; align-items: center; gap: 6px; font: 600 .72rem/1 var(--font-mono); letter-spacing: .06em; text-transform: uppercase; color: #cdbfff; padding: 5px 8px; border-radius: 6px; background: var(--ai-dim); }
.insight__badge .spark { width: 12px; height: 12px; color: var(--ai); }
.insight p { margin: 0; color: var(--text); font-size: .9rem; line-height: 1.5; min-height: 4.5em; }
.insight p .caret { display: inline-block; width: 7px; height: 1em; background: var(--ai); vertical-align: -2px; margin-left: 2px; animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.models { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; }
.model {
  position: relative; overflow: hidden;
  padding: 9px 14px; border-radius: 999px; border: 1px solid var(--line-2);
  background: rgba(7, 11, 22, .6); color: var(--text-2);
  font: 500 .82rem/1 var(--font-body); cursor: pointer; backdrop-filter: blur(10px);
  transition: color .2s, border-color .2s, background .2s;
}
.model:hover { color: var(--text); border-color: rgba(58, 216, 255, .4); }
.model.is-active { color: var(--twin); border-color: rgba(58, 216, 255, .55); background: rgba(58, 216, 255, .1); }
.model.is-active::after { content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 100%; background: var(--twin); transform-origin: left; animation: progress var(--cycle, 8s) linear forwards; }
.models.is-paused .model.is-active::after { animation: none; transform: scaleX(0); }
@keyframes progress { from { transform: scaleX(0); } to { transform: scaleX(1); } }

/* Sensor labels projected from 3D */
.hero__labels { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.tag { position: absolute; left: 0; top: 0; will-change: transform; transition: opacity .35s ease; }
.tag__dot { position: absolute; width: 9px; height: 9px; margin: -4.5px 0 0 -4.5px; border-radius: 50%; background: var(--warn); box-shadow: 0 0 0 4px rgba(255,195,92,.18), 0 0 14px var(--warn); }
.tag__line { position: absolute; left: 0; top: 0; width: 34px; height: 1px; background: linear-gradient(90deg, var(--warn), rgba(255,195,92,.2)); transform-origin: 0 0; transform: rotate(-35deg); }
.tag__card {
  position: absolute; left: 26px; top: -46px; white-space: nowrap;
  padding: 7px 10px; border-radius: 9px; background: rgba(7, 11, 22, .78); border: 1px solid rgba(255,195,92,.3);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); font-family: var(--font-mono);
}
.tag__card span { display: block; font-size: .64rem; color: var(--text-3); text-transform: uppercase; letter-spacing: .08em; }
.tag__card b { font-size: .92rem; font-weight: 500; color: var(--text); font-variant-numeric: tabular-nums; }
.tag__card small { color: var(--text-3); font-size: .7rem; margin-left: 3px; }
.hero__labels.is-hidden .tag { opacity: 0; }

.hero__scroll { position: absolute; left: 50%; bottom: 22px; width: 26px; height: 42px; margin-left: -13px; border: 1.5px solid var(--line-2); border-radius: 14px; }
.hero__scroll span { position: absolute; left: 50%; top: 8px; width: 3px; height: 8px; margin-left: -1.5px; border-radius: 2px; background: var(--twin); animation: scrolldot 1.8s ease-in-out infinite; }
@keyframes scrolldot { 0% { opacity: 0; transform: translateY(0); } 30% { opacity: 1; } 100% { opacity: 0; transform: translateY(14px); } }

@media (max-width: 980px) {
  .hero { min-height: auto; display: block; }
  .hero__stage { position: relative; height: 62svh; min-height: 420px; }
  .hero__scrim { background: linear-gradient(0deg, var(--bg) 0%, rgba(4,6,12,0) 30%), linear-gradient(180deg, rgba(4,6,12,.8) 0%, rgba(4,6,12,0) 25%); height: 62svh; min-height: 420px; }
  .hero__inner { grid-template-columns: 1fr; padding: 0 0 56px; margin-top: -64px; gap: 28px; }
  .hero__hud { order: -1; justify-self: stretch; width: 100%; }
  .models { justify-content: flex-start; flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; margin-inline: -16px; padding-inline: 16px; }
  .models::-webkit-scrollbar { display: none; }
  .model { flex: none; }
  .hero__scroll { display: none; }
  .tag__card { padding: 5px 8px; top: -40px; }
  .tag__card b { font-size: .8rem; }
}

/* ---------- Generic sections ---------- */
.section { position: relative; padding: 120px 0; }
.section--alt { background: linear-gradient(180deg, var(--bg-2), var(--bg) 100%); border-block: 1px solid var(--line); }
.section__head { max-width: 800px; margin-bottom: 56px; }
.section__head--center { margin-inline: auto; text-align: center; }
.section__head--center .lead { margin-inline: auto; }
@media (max-width: 700px) { .section { padding: 80px 0; } .section__head { margin-bottom: 40px; } }

.split { display: grid; grid-template-columns: 1fr 1.1fr; gap: 64px; align-items: start; }
@media (max-width: 960px) { .split { grid-template-columns: 1fr; gap: 40px; } }

/* ---------- Twin anything (marquee) ---------- */
.anything { padding: 90px 0 110px; position: relative; }
.anything__head { margin-bottom: 44px; max-width: 900px; }
.anything__head h2 { font-size: clamp(1.7rem, 3vw, 2.5rem); }
.marquee { overflow: hidden; mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.marquee + .marquee { margin-top: 14px; }
.marquee__track { list-style: none; margin: 0; padding: 0; display: flex; gap: 14px; width: max-content; animation: marquee 60s linear infinite; }
.marquee--reverse .marquee__track { animation-direction: reverse; animation-duration: 70s; }
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee li {
  display: flex; align-items: center; gap: 12px; padding: 14px 20px; border-radius: 14px;
  background: linear-gradient(180deg, var(--surface), var(--bg-2)); border: 1px solid var(--line);
  white-space: nowrap; transition: border-color .2s;
}
.marquee li:hover { border-color: rgba(58,216,255,.45); }
.marquee li b { font: 500 1.02rem var(--font-head); }
.marquee li span { font: .68rem var(--font-mono); text-transform: uppercase; letter-spacing: .1em; color: var(--text-3); padding: 4px 8px; border-radius: 6px; background: var(--bg); border: 1px solid var(--line); }
.marquee li::before { content: ""; width: 8px; height: 8px; border: 1.5px solid var(--twin); transform: rotate(45deg); border-radius: 2px; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- What is a twin ---------- */
.compare { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.compare__card { padding: 26px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); }
.compare__card--hero { background: linear-gradient(160deg, rgba(58,216,255,.12), rgba(155,123,255,.10) 60%, var(--surface)); border-color: rgba(58,216,255,.35); box-shadow: 0 30px 80px -40px rgba(58,216,255,.5); }
.compare__art { height: 120px; margin-bottom: 18px; border-radius: 12px; background: var(--bg-2); border: 1px solid var(--line); display: grid; place-items: center; overflow: hidden; }
.compare__art svg { width: 100%; height: 100%; }
.art-model3d .t { fill: #3a4458; } .art-model3d .l { fill: #262e3e; } .art-model3d .r { fill: #2f3849; }
.art-dash rect { fill: #121b2f; stroke: var(--line-2); }
.art-dash .ln { fill: none; stroke: var(--text-3); stroke-width: 2; stroke-dasharray: 200; animation: draw 3s ease-in-out infinite alternate; }
.art-twin .t { fill: rgba(58,216,255,.15); stroke: var(--twin); stroke-width: 1.5; }
.art-twin .l { fill: var(--phys-dark); } .art-twin .r { fill: rgba(58,216,255,.06); stroke: var(--twin); stroke-width: 1.5; }
.art-twin .ai { fill: var(--ai); filter: drop-shadow(0 0 6px var(--ai)); animation: pulse-op 1.6s ease-in-out infinite; }
@keyframes pulse-op { 50% { opacity: .35; } }
@keyframes draw { from { stroke-dashoffset: 200; } to { stroke-dashoffset: 0; } }
.compare__tag { font-size: .76rem; color: var(--twin); margin-bottom: 14px; }
.compare__card:not(.compare__card--hero) .compare__tag { color: var(--text-3); }
.compare__list { list-style: none; padding: 0; margin: 0; display: grid; gap: 9px; font-size: .92rem; color: var(--text-2); }
.compare__list li { display: flex; gap: 10px; align-items: center; }
.compare__list li::before { flex: none; display: grid; place-items: center; width: 20px; height: 20px; border-radius: 6px; font-size: .72rem; font-weight: 700; }
.compare__list .yes::before { content: "✓"; background: rgba(52,227,160,.14); color: var(--ok); }
.compare__list .no { color: var(--text-3); }
.compare__list .no::before { content: "–"; background: rgba(255,255,255,.04); color: var(--text-3); }
.compare__list i { color: var(--text-3); font-style: normal; font-size: .8rem; }

.benefits { list-style: none; padding: 0; margin: 56px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.benefits li { background: var(--bg); padding: 22px 24px; display: grid; gap: 4px; }
.benefits b { font-family: var(--font-head); font-size: 1rem; }
.benefits b::before { content: "▸ "; color: var(--twin); }
.benefits span { color: var(--text-2); font-size: .9rem; }
@media (max-width: 900px) { .compare { grid-template-columns: 1fr; } .benefits { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .benefits { grid-template-columns: 1fr; } }

/* ---------- Any scale ---------- */
.scale__grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 56px; align-items: center; }
.scale__steps { list-style: none; padding: 0; margin: 28px 0 24px; display: flex; flex-wrap: wrap; gap: 6px; }
.scale__steps button {
  padding: 9px 13px; border-radius: 10px; border: 1px solid var(--line-2); background: var(--surface);
  color: var(--text-2); font: 500 .85rem/1 var(--font-body); cursor: pointer; transition: all .2s;
}
.scale__steps button:hover { color: var(--text); border-color: rgba(58,216,255,.4); }
.scale__steps button[aria-selected="true"] { color: #03121a; background: var(--twin); border-color: var(--twin); }
.scale__info { margin: 0; display: grid; gap: 14px; padding: 20px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); }
.scale__info div { display: grid; grid-template-columns: 110px 1fr; gap: 12px; align-items: baseline; }
.scale__info dt { font: .72rem var(--font-mono); text-transform: uppercase; letter-spacing: .1em; color: var(--text-3); display: inline-flex; align-items: center; gap: 6px; }
.scale__info dd { margin: 0; font-size: .95rem; transition: opacity .25s; }
.scale__stage { position: relative; aspect-ratio: 1.1; border-radius: 22px; overflow: hidden; border: 1px solid var(--line);
  background: radial-gradient(ellipse 70% 60% at 50% 55%, rgba(58,216,255,.08), transparent 70%), var(--bg-2); }
#scaleCanvas { width: 100%; height: 100%; }
.scale__badge { position: absolute; left: 16px; top: 16px; font-size: .78rem; color: var(--twin); padding: 6px 10px; border-radius: 8px; background: rgba(4,6,12,.7); border: 1px solid rgba(58,216,255,.25); }
.scale__controls { position: absolute; right: 14px; bottom: 14px; display: flex; gap: 6px; }
.icon-btn { width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--line-2); background: rgba(4,6,12,.7); color: var(--text); font-size: 1.2rem; cursor: pointer; transition: border-color .2s, color .2s; }
.icon-btn:hover { border-color: var(--twin); color: var(--twin); }
.icon-btn:disabled { opacity: .35; cursor: default; }
@media (max-width: 960px) { .scale__grid { grid-template-columns: 1fr; gap: 36px; } .scale__stage { order: -1; } }
@media (max-width: 480px) { .scale__info div { grid-template-columns: 1fr; gap: 2px; } }

/* ---------- Flow diagram ---------- */
.flow__diagram { border-radius: 22px; border: 1px solid var(--line); background: radial-gradient(ellipse 60% 70% at 55% 50%, rgba(58,216,255,.06), transparent 70%), var(--bg); padding: 28px 20px; }
.flow__svg { width: 100%; height: auto; overflow: visible; }
.flow__col-labels text { font: 500 11px var(--font-mono); letter-spacing: .14em; fill: var(--text-3); text-anchor: middle; }
.flow__nodes rect { fill: var(--surface); stroke: var(--line-2); }
.flow__nodes text { font: 500 14px var(--font-body); fill: var(--text); }
.flow__nodes--phys rect { stroke: rgba(255,138,76,.45); }
.flow__nodes--act g { transition: opacity .4s; opacity: .5; }
.flow__nodes--act g rect { transition: stroke .4s, fill .4s; }
.flow__nodes--act g.is-on { opacity: 1; }
.flow__nodes--act g.is-on rect { stroke: var(--ok); fill: rgba(52,227,160,.08); }
.flow__paths path { fill: none; stroke-width: 1.5; opacity: .55; stroke-dasharray: 4 6; animation: dash 1.2s linear infinite; }
.flow__paths--ai path { stroke: var(--ai); }
@keyframes dash { to { stroke-dashoffset: -20; } }
.pk { filter: drop-shadow(0 0 6px currentColor); }
.pk--phys { fill: var(--phys); color: var(--phys); }
.pk--twin { fill: var(--twin); color: var(--twin); }
.pk--ai { fill: var(--ai); color: var(--ai); }
.flow__cube { animation: float 5s ease-in-out infinite; }
.cube-top { fill: rgba(58,216,255,.18); stroke: var(--twin); stroke-width: 1.5; }
.cube-side { fill: rgba(58,216,255,.06); stroke: var(--twin); stroke-width: 1.5; }
.cube-grid { stroke: var(--twin); stroke-width: .8; opacity: .45; fill: none; }
.flow__core-label { font: 500 12px var(--font-mono); fill: var(--text-2); text-anchor: middle; }
.orb-core { fill: rgba(155,123,255,.85); }
.orb-glow { animation: orb 3s ease-in-out infinite; transform-origin: center; }
.orb-ring { fill: none; stroke: var(--ai); stroke-width: 1; opacity: .5; stroke-dasharray: 3 7; animation: spin 14s linear infinite; transform-origin: center; }
.orb-ring--2 { opacity: .25; animation-duration: 22s; animation-direction: reverse; }
@keyframes orb { 50% { opacity: .6; transform: scale(.92); } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes float { 50% { transform: translateY(-6px); } }

.flow__steps { list-style: none; padding: 0; margin: 40px 0 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.flow__n { display: inline-block; font-size: .8rem; color: var(--c); padding: 4px 8px; border-radius: 6px; border: 1px solid currentColor; margin-bottom: 14px; }
.flow__steps p { color: var(--text-2); font-size: .93rem; margin: 0; }
@media (max-width: 900px) { .flow__steps { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) {
  .flow__diagram { padding: 14px 4px; overflow-x: auto; }
  .flow__svg { min-width: 680px; }
  .flow__steps { grid-template-columns: 1fr; }
}

/* ---------- Brix AI ---------- */
.ai { overflow: hidden; }
.ai__glow { position: absolute; left: 50%; top: 0; width: 1100px; height: 700px; transform: translateX(-50%); pointer-events: none;
  background: radial-gradient(closest-side, rgba(155,123,255,.18), transparent 70%); filter: blur(30px); }
.copilot { position: relative; display: grid; grid-template-columns: 1fr 1.05fr; border-radius: 22px; overflow: hidden;
  border: 1px solid rgba(155,123,255,.3); background: var(--bg-2);
  box-shadow: 0 50px 120px -50px rgba(155,123,255,.55), inset 0 1px 0 rgba(255,255,255,.04); }
.copilot__chat { display: flex; flex-direction: column; min-height: 540px; max-height: 600px; border-right: 1px solid var(--line); background: linear-gradient(180deg, rgba(20,16,44,.5), var(--bg-2)); min-width: 0; }
.copilot__bar { display: flex; align-items: center; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.copilot__bar > div { display: grid; flex: 1; font-size: .95rem; line-height: 1.3; }
.copilot__bar .muted { font-size: .7rem; }
.copilot__avatar { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 11px; background: linear-gradient(135deg, var(--ai), #5b3fd6); box-shadow: 0 0 20px rgba(155,123,255,.5); }
.copilot__avatar .spark { color: #fff; width: 18px; height: 18px; }
.live { display: inline-flex; align-items: center; gap: 6px; font: 600 .68rem/1 var(--font-mono); color: var(--ok); letter-spacing: .1em; }
.live__dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); animation: pulse 1.6s ease-out infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(52,227,160,.6); } 100% { box-shadow: 0 0 0 9px rgba(52,227,160,0); } }

.copilot__log { flex: 1; overflow-y: auto; padding: 18px; display: flex; flex-direction: column; gap: 14px; scroll-behavior: smooth; }
.msg { max-width: 92%; font-size: .9rem; line-height: 1.55; animation: msgin .35s ease both; }
.msg p { margin: 0; }
.msg p + p { margin-top: 8px; }
.msg--user { align-self: flex-end; padding: 10px 14px; border-radius: 14px 14px 4px 14px; background: var(--surface-2); border: 1px solid var(--line-2); }
.msg--ai { align-self: flex-start; padding: 12px 14px; border-radius: 14px 14px 14px 4px; background: rgba(155,123,255,.08); border: 1px solid rgba(155,123,255,.22); }
.msg--ai b { color: #fff; }
@keyframes msgin { from { opacity: 0; transform: translateY(6px); } }
.steps-log { list-style: none; padding: 0; margin: 0 0 10px; display: grid; gap: 5px; font: .76rem var(--font-mono); color: var(--text-3); }
.steps-log li { display: flex; gap: 8px; align-items: center; }
.steps-log li::before { content: ""; width: 10px; height: 10px; border-radius: 50%; border: 1.5px solid var(--ai); border-right-color: transparent; animation: spin .8s linear infinite; flex: none; }
.steps-log li.done { color: var(--text-2); }
.steps-log li.done::before { content: "✓"; border: 0; animation: none; color: var(--ok); font-size: .75rem; width: 10px; height: auto; line-height: 1; }
.rcard { margin-top: 10px; padding: 12px; border-radius: 10px; background: var(--bg); border: 1px solid var(--line-2); }
.rcard__k { font: .66rem var(--font-mono); text-transform: uppercase; letter-spacing: .1em; color: var(--ai); margin-bottom: 6px; }
.rcard .btn { --h: 32px; padding: 0 12px; font-size: .78rem; margin-top: 10px; }
.rcard .done-note { color: var(--ok); font-size: .82rem; margin-top: 8px; }
.risk-row { display: grid; grid-template-columns: 1fr 90px 52px; gap: 10px; align-items: center; font-size: .82rem; padding: 4px 0; }
.risk-row .bar { height: 6px; border-radius: 4px; background: var(--surface-2); overflow: hidden; }
.risk-row .bar i { display: block; height: 100%; border-radius: 4px; background: linear-gradient(90deg, var(--warn), var(--bad)); width: 0; transition: width 1s cubic-bezier(.2,.8,.2,1); }
.risk-row .mono { color: var(--text-3); font-size: .72rem; text-align: right; }
.kv { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.kv div { padding: 8px 10px; border-radius: 8px; background: var(--surface); }
.kv span { display: block; font-size: .7rem; color: var(--text-3); }
.kv b { font: 500 1rem var(--font-mono); }
.kv .up { color: var(--ok); } .kv .down { color: var(--warn); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.chips span { font: .7rem var(--font-mono); padding: 4px 7px; border-radius: 6px; background: var(--twin-dim); color: var(--twin); }

.copilot__prompts { display: flex; gap: 8px; padding: 10px 18px 0; overflow-x: auto; scrollbar-width: none; }
.copilot__prompts::-webkit-scrollbar { display: none; }
.copilot__prompts button { flex: none; padding: 8px 12px; border-radius: 999px; border: 1px solid rgba(155,123,255,.35); background: rgba(155,123,255,.08); color: #d9d0ff; font: 500 .8rem/1 var(--font-body); cursor: pointer; transition: background .2s, border-color .2s; }
.copilot__prompts button:hover { background: rgba(155,123,255,.18); border-color: var(--ai); }
.copilot__prompts button:disabled { opacity: .4; cursor: default; }
.copilot__input { display: flex; gap: 8px; padding: 12px 18px 18px; }
.copilot__input input { flex: 1; min-width: 0; height: 46px; padding: 0 16px; border-radius: 12px; border: 1px solid var(--line-2); background: var(--bg); color: var(--text); font: 400 .92rem var(--font-body); }
.copilot__input input:focus { outline: none; border-color: var(--ai); box-shadow: 0 0 0 3px var(--ai-dim); }
.copilot__input button { width: 46px; height: 46px; border-radius: 12px; border: 0; cursor: pointer; background: linear-gradient(135deg, var(--ai), #6a4ce6); display: grid; place-items: center; }
.copilot__input svg { width: 18px; height: 18px; fill: #fff; }

.copilot__twin { position: relative; min-width: 0; background: radial-gradient(ellipse 70% 60% at 50% 55%, rgba(58,216,255,.07), transparent 70%); }
#aiCanvas { width: 100%; height: 100%; min-height: 380px; }
.copilot__twin-head { position: absolute; left: 16px; right: 16px; top: 14px; display: flex; justify-content: space-between; font-size: .74rem; color: var(--text-3); }
#aiTwinStatus { color: var(--ok); }
#aiTwinStatus.is-busy { color: var(--ai); }
.copilot__legend { position: absolute; left: 16px; bottom: 14px; display: flex; gap: 14px; flex-wrap: wrap; font-size: .68rem; color: var(--text-3); }
.copilot__legend span { display: inline-flex; align-items: center; gap: 5px; }
.sw { width: 9px; height: 9px; border-radius: 2px; display: inline-block; }
.sw--phys { background: var(--phys); }
.sw--twin { border: 1.5px solid var(--twin); }
.sw--ai { background: var(--ai); border-radius: 50%; box-shadow: 0 0 6px var(--ai); }
.copilot__note { text-align: center; font-size: .7rem; color: var(--text-3); margin: 14px 0 0; }
@media (max-width: 900px) {
  .copilot { grid-template-columns: 1fr; }
  .copilot__twin { order: -1; border-bottom: 1px solid var(--line); }
  #aiCanvas { min-height: 300px; height: 300px; }
  .copilot__chat { border-right: 0; min-height: 480px; }
}

.ai__features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 64px; }
.aif { padding: 24px; border-radius: var(--radius); background: linear-gradient(180deg, rgba(155,123,255,.06), transparent 70%), var(--surface); border: 1px solid var(--line); transition: border-color .25s, transform .25s; }
.aif:hover { border-color: rgba(155,123,255,.45); transform: translateY(-3px); }
.aif__icon { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 12px; margin-bottom: 16px; background: var(--ai-dim); color: #cdbfff; font: 600 1.1rem var(--font-head); border: 1px solid rgba(155,123,255,.3); }
.aif p { color: var(--text-2); font-size: .92rem; margin: 0; }
@media (max-width: 900px) { .ai__features { grid-template-columns: 1fr 1fr; } }
@media (max-width: 580px) { .ai__features { grid-template-columns: 1fr; } }

/* ---------- Platform capabilities ---------- */
.caps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.cap { padding: 26px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); transition: border-color .25s, transform .25s; }
.cap:hover { border-color: rgba(58,216,255,.4); transform: translateY(-3px); }
.cap__art { width: 100%; height: 110px; margin-bottom: 20px; border-radius: 12px; background: var(--bg-2); border: 1px solid var(--line); padding: 10px; }
.cap p { color: var(--text-2); font-size: .92rem; margin: 0; }
@media (max-width: 900px) { .caps { grid-template-columns: 1fr 1fr; } }
@media (max-width: 580px) { .caps { grid-template-columns: 1fr; } }

.art-connect circle { fill: var(--phys); }
.art-connect .flowline { fill: none; stroke: var(--twin); stroke-width: 1.5; stroke-dasharray: 4 5; animation: dash 1s linear infinite; }
.art-connect .hub { fill: var(--twin-dim); stroke: var(--twin); stroke-width: 1.5; }
.art-model .t { fill: var(--phys); } .art-model .l { fill: var(--phys-dark); } .art-model .r { fill: #e06a33; }
.art-model .b3 .t { fill: rgba(58,216,255,.2); stroke: var(--twin); } .art-model .b3 .l, .art-model .b3 .r { fill: rgba(58,216,255,.06); stroke: var(--twin); }
.art-model .b3 { animation: drop 3s cubic-bezier(.3,1.4,.5,1) infinite; }
@keyframes drop { 0%, 15% { transform: translate(0, -60px); opacity: 0; } 40%, 85% { transform: translate(0, -24px); opacity: 1; } 100% { transform: translate(0, -24px); opacity: 0; } }
.art-cube { display: grid; place-items: center; perspective: 400px; }
.cube3d { position: relative; width: 52px; height: 52px; transform-style: preserve-3d; animation: rot 9s linear infinite; }
.cube3d i { position: absolute; inset: 0; border: 1.5px solid var(--twin); background: rgba(58,216,255,.06); box-shadow: inset 0 0 14px rgba(58,216,255,.25); }
.cube3d i:nth-child(1) { transform: translateZ(26px); }
.cube3d i:nth-child(2) { transform: rotateY(180deg) translateZ(26px); }
.cube3d i:nth-child(3) { transform: rotateY(90deg) translateZ(26px); }
.cube3d i:nth-child(4) { transform: rotateY(-90deg) translateZ(26px); }
.cube3d i:nth-child(5) { transform: rotateX(90deg) translateZ(26px); border-color: var(--phys); }
.cube3d i:nth-child(6) { transform: rotateX(-90deg) translateZ(26px); }
@keyframes rot { from { transform: rotateX(-24deg) rotateY(0); } to { transform: rotateX(-24deg) rotateY(360deg); } }
.art-sim .base { stroke: var(--phys); stroke-width: 2; fill: none; }
.art-sim .fut { fill: none; stroke: var(--twin); stroke-width: 1.5; stroke-dasharray: 120; stroke-dashoffset: 120; animation: fut 3.5s ease-in-out infinite; }
.art-sim .f3 { stroke: var(--ai); stroke-width: 2.2; }
.art-sim .f2 { animation-delay: .15s; } .art-sim .f3 { animation-delay: .3s; } .art-sim .f4 { animation-delay: .45s; } .art-sim .f5 { animation-delay: .6s; }
.art-sim .node { fill: var(--text); }
@keyframes fut { 0% { stroke-dashoffset: 120; opacity: .2; } 50%, 80% { stroke-dashoffset: 0; opacity: 1; } 100% { stroke-dashoffset: 0; opacity: 0; } }
.art-predict .cone { fill: rgba(155,123,255,.18); animation: pulse-op 3s ease-in-out infinite; }
.art-predict .hist { fill: none; stroke: var(--twin); stroke-width: 2; }
.art-predict .fc { fill: none; stroke: var(--ai); stroke-width: 2; stroke-dasharray: 4 4; animation: dash 1s linear infinite; }
.art-predict .now { stroke: var(--line-2); stroke-dasharray: 2 3; }
.art-predict .dot { fill: #fff; }
.art-auto .track { fill: none; stroke: var(--line-2); stroke-width: 1.5; stroke-dasharray: 3 4; }
.art-auto .n { fill: var(--surface-2); stroke: var(--twin); stroke-width: 1.2; }
.art-auto .n--done { stroke: var(--ok); fill: rgba(52,227,160,.12); }
.art-auto .mover { fill: var(--ai); filter: drop-shadow(0 0 5px var(--ai)); }

/* ---------- Challenges ---------- */
.challenges { display: grid; grid-template-columns: 340px 1fr; gap: 0; border: 1px solid var(--line); border-radius: 22px; overflow: hidden; background: var(--surface); }
.challenges__tabs { display: flex; flex-direction: column; padding: 10px; gap: 4px; border-right: 1px solid var(--line); background: var(--bg-2); }
.challenges__tabs button { text-align: left; padding: 14px 16px; border-radius: 12px; border: 1px solid transparent; background: transparent; color: var(--text-2); font: 500 .95rem var(--font-body); cursor: pointer; transition: all .2s; }
.challenges__tabs button:hover { color: var(--text); background: var(--surface); }
.challenges__tabs button.is-active { color: var(--text); background: var(--surface-2); border-color: rgba(58,216,255,.35); box-shadow: inset 3px 0 0 var(--twin); }
.challenges__panel { padding: 40px; display: flex; flex-direction: column; justify-content: center; }
.challenges__panel > * { transition: opacity .25s; }
.challenges__panel.is-swapping > * { opacity: 0; }
.challenges__k { font-size: .74rem; text-transform: uppercase; letter-spacing: .12em; color: var(--ai); margin-bottom: 12px; }
.challenges__panel h3 { font-size: clamp(1.3rem, 2.2vw, 1.8rem); }
.challenges__panel p { color: var(--text-2); max-width: 60ch; }
.challenges__points { list-style: none; padding: 0; margin: 10px 0 0; display: grid; gap: 10px; }
.challenges__points li { display: flex; gap: 10px; color: var(--text); font-size: .95rem; }
.challenges__points li::before { content: "→"; color: var(--twin); }
@media (max-width: 860px) {
  .challenges { grid-template-columns: 1fr; }
  .challenges__tabs { flex-direction: row; overflow-x: auto; border-right: 0; border-bottom: 1px solid var(--line); scrollbar-width: none; }
  .challenges__tabs::-webkit-scrollbar { display: none; }
  .challenges__tabs button { flex: none; white-space: nowrap; }
  .challenges__tabs button.is-active { box-shadow: inset 0 -3px 0 var(--twin); }
  .challenges__panel { padding: 26px; }
}

/* ---------- Sectors ---------- */
.sectors { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.sector { position: relative; padding: 22px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); overflow: hidden; transition: border-color .25s, transform .25s; }
.sector::after { content: ""; position: absolute; inset: auto -40% -60% auto; width: 160px; height: 160px; border-radius: 50%; background: radial-gradient(closest-side, rgba(58,216,255,.18), transparent); opacity: 0; transition: opacity .3s; }
.sector:hover { border-color: rgba(58,216,255,.4); transform: translateY(-3px); }
.sector:hover::after { opacity: 1; }
.sector__k { font-size: .72rem; color: var(--phys); display: block; margin-bottom: 18px; }
.sector p { color: var(--text-2); font-size: .9rem; margin: 0; }
@media (max-width: 1000px) { .sectors { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 760px) { .sectors { grid-template-columns: 1fr 1fr; } }
@media (max-width: 460px) { .sectors { grid-template-columns: 1fr; } }

/* ---------- What-if lab ---------- */
.lab { display: grid; grid-template-columns: 1fr 1.2fr; border: 1px solid var(--line); border-radius: 22px; overflow: hidden; background: var(--surface); }
.lab__controls { padding: 34px; display: flex; flex-direction: column; gap: 26px; border-right: 1px solid var(--line); background: var(--bg-2); }
.lab__controls .btn { align-self: flex-start; }
.ctrl label { display: flex; justify-content: space-between; align-items: baseline; font-size: .92rem; font-weight: 500; margin-bottom: 10px; gap: 12px; }
.ctrl output { color: var(--twin); font-size: .85rem; }
input[type="range"] { -webkit-appearance: none; appearance: none; width: 100%; height: 6px; border-radius: 6px; background: var(--surface-2); outline: none; cursor: pointer;
  background-image: linear-gradient(90deg, var(--twin), var(--ai)); background-size: var(--p, 50%) 100%; background-repeat: no-repeat; }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 20px; height: 20px; border-radius: 50%; background: #fff; border: 4px solid var(--bg); box-shadow: 0 0 0 1px var(--line-2), 0 4px 12px rgba(0,0,0,.5); }
input[type="range"]::-moz-range-thumb { width: 14px; height: 14px; border-radius: 50%; background: #fff; border: 4px solid var(--bg); }
input[type="range"]:focus-visible { outline: 2px solid var(--twin); outline-offset: 6px; }
.lab__results { padding: 34px; display: flex; flex-direction: column; gap: 22px; }
.meter__head { display: flex; justify-content: space-between; font-size: .92rem; color: var(--text-2); margin-bottom: 8px; }
.meter__head b { color: var(--text); font-weight: 500; }
.meter__track { position: relative; height: 10px; border-radius: 6px; background: var(--bg-2); border: 1px solid var(--line); }
.meter__fill { position: absolute; left: 0; top: 0; bottom: 0; border-radius: 6px; background: linear-gradient(90deg, rgba(58,216,255,.5), var(--twin)); transition: width .35s cubic-bezier(.2,.8,.2,1); }
.meter__base { position: absolute; top: -4px; bottom: -4px; width: 2px; background: #fff; opacity: .7; z-index: 1; border-radius: 1px; }
.meter.is-worse .meter__fill { background: linear-gradient(90deg, rgba(255,138,76,.5), var(--phys)); }
.lab__verdict { margin-top: 4px; padding: 14px 16px; border-radius: var(--radius-sm); background: rgba(155,123,255,.07); border: 1px solid rgba(155,123,255,.25); }
.lab__verdict p { margin: 8px 0 0; color: var(--text-2); font-size: .93rem; }
.lab__verdict strong { color: var(--text); }
.lab__note { margin: 0; font-size: .7rem; color: var(--text-3); }
@media (max-width: 860px) {
  .lab { grid-template-columns: 1fr; }
  .lab__controls { border-right: 0; border-bottom: 1px solid var(--line); }
  .lab__controls, .lab__results { padding: 24px; }
}

/* ---------- Steps ---------- */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative; }
.steps::before { content: ""; position: absolute; top: 22px; left: 22px; right: 22px; height: 1px; background: linear-gradient(90deg, var(--phys), var(--twin), var(--ai)); opacity: .55; }
.step { position: relative; }
.step__n { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; background: var(--bg); border: 1px solid var(--line-2); color: var(--twin); margin-bottom: 18px; position: relative; }
.step p { color: var(--text-2); font-size: .93rem; margin: 0; }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr 1fr; gap: 32px; } .steps::before { display: none; } }
@media (max-width: 520px) { .steps { grid-template-columns: 1fr; } }

/* ---------- Features ---------- */
.features { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 28px 32px; }
.features li { padding-top: 18px; border-top: 1px solid var(--line-2); }
.features p { color: var(--text-2); font-size: .93rem; margin: 0; }
@media (max-width: 560px) { .features { grid-template-columns: 1fr; } }

/* ---------- FAQ ---------- */
.faq { display: grid; grid-template-columns: 1fr 1.6fr; gap: 64px; align-items: start; }
.faq__list { display: grid; gap: 10px; }
.faq__list details { border: 1px solid var(--line); border-radius: 14px; background: var(--surface); transition: border-color .2s; }
.faq__list details[open] { border-color: rgba(58,216,255,.3); }
.faq__list summary { list-style: none; cursor: pointer; padding: 18px 20px; font: 600 1rem var(--font-head); display: flex; justify-content: space-between; gap: 16px; align-items: center; }
.faq__list summary::-webkit-details-marker { display: none; }
.faq__list summary::after { content: "+"; flex: none; display: grid; place-items: center; width: 26px; height: 26px; border-radius: 8px; background: var(--bg-2); color: var(--twin); font: 400 1.1rem var(--font-body); transition: transform .25s; }
.faq__list details[open] summary::after { transform: rotate(45deg); }
.faq__list details p { margin: 0; padding: 0 20px 20px; color: var(--text-2); font-size: .95rem; }
@media (max-width: 900px) { .faq { grid-template-columns: 1fr; gap: 32px; } }

/* ---------- Company + CTA ---------- */
.company { background: radial-gradient(ellipse 60% 50% at 15% 0%, rgba(58,216,255,.08), transparent 60%), radial-gradient(ellipse 50% 50% at 90% 70%, rgba(155,123,255,.10), transparent 60%); border-top: 1px solid var(--line); }
.company__inner { display: grid; grid-template-columns: 1.3fr 1fr; gap: 56px; align-items: center; margin-bottom: 110px; }
.company__values { display: grid; gap: 12px; }
.company__values div { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 18px 20px; border-radius: 14px; background: var(--surface); border: 1px solid var(--line); }
.company__values b { font: 600 1.1rem var(--font-head); }
.company__values span { color: var(--text-2); font-size: .9rem; text-align: right; }
.cta { display: grid; grid-template-columns: 1fr 1.05fr; gap: 64px; align-items: start; }
.checks { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 10px; color: var(--text-2); }
.checks li { display: flex; gap: 10px; align-items: center; }
.checks li::before { content: "✓"; display: grid; place-items: center; width: 22px; height: 22px; border-radius: 6px; background: var(--twin-dim); color: var(--twin); font-size: .75rem; font-weight: 700; }
.form { padding: 28px; border-radius: 20px; background: var(--surface); border: 1px solid var(--line-2); box-shadow: var(--shadow); display: grid; gap: 16px; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form label { display: grid; gap: 6px; font-size: .85rem; color: var(--text-2); font-weight: 500; }
.form input, .form select, .form textarea { width: 100%; padding: 12px 14px; border-radius: var(--radius-sm); background: var(--bg-2); border: 1px solid var(--line-2); color: var(--text); font: 400 .95rem/1.4 var(--font-body); transition: border-color .2s, box-shadow .2s; }
.form textarea { resize: vertical; min-height: 110px; }
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--twin); box-shadow: 0 0 0 3px var(--twin-dim); }
.form input.is-invalid { border-color: var(--bad); }
.form__status { margin: 0; font-size: .9rem; min-height: 1.4em; }
.form__status.ok { color: var(--ok); }
.form__status.err { color: var(--bad); }
@media (max-width: 900px) { .company__inner, .cta { grid-template-columns: 1fr; gap: 40px; } .company__inner { margin-bottom: 80px; } }
@media (max-width: 520px) { .form__row { grid-template-columns: 1fr; } .form { padding: 20px; } }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--line); padding: 56px 0 28px; background: var(--bg); }
.footer__inner { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.footer__brand p { margin: 12px 0 0; max-width: 34ch; font-size: .92rem; }
.footer__owner { color: var(--text-2); }
.footer__owner a { color: var(--text); border-bottom: 1px solid var(--line-2); }
.footer__owner a:hover { border-color: var(--twin); }
.footer__cols { display: flex; gap: 64px; flex-wrap: wrap; }
.footer__cols h4 { font: 500 .74rem var(--font-mono); text-transform: uppercase; letter-spacing: .1em; color: var(--text-3); margin-bottom: 14px; }
.footer__cols a { display: block; color: var(--text-2); font-size: .92rem; padding: 4px 0; }
.footer__cols a:hover { color: var(--text); }
.footer__base { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--line); font-size: .82rem; }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .8s ease, transform .8s cubic-bezier(.2,.8,.2,1); }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; }
  .marquee__track { animation: none; }
}

/* ---------- Command any twin ---------- */
.cmd { display: grid; grid-template-columns: 320px 1fr; border-radius: 22px; overflow: hidden; border: 1px solid rgba(155,123,255,.28); background: var(--bg-2); box-shadow: 0 50px 120px -60px rgba(155,123,255,.5); }
.cmd__types { display: flex; flex-direction: column; gap: 4px; padding: 10px; border-right: 1px solid var(--line); background: var(--bg); }
.cmd__types button { display: flex; gap: 12px; align-items: center; text-align: left; padding: 12px; border-radius: 12px; border: 1px solid transparent; background: transparent; color: var(--text-2); cursor: pointer; transition: all .2s; }
.cmd__types button:hover { background: var(--surface); color: var(--text); }
.cmd__types button.is-active { background: var(--surface-2); border-color: rgba(155,123,255,.4); color: var(--text); box-shadow: inset 3px 0 0 var(--ai); }
.cmd__types svg { flex: none; width: 34px; height: 34px; padding: 6px; border-radius: 10px; background: var(--bg-2); border: 1px solid var(--line-2); fill: none; stroke: var(--twin); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.cmd__types button.is-active svg { stroke: #cdbfff; border-color: rgba(155,123,255,.45); background: var(--ai-dim); }
.cmd__types span { display: grid; line-height: 1.3; }
.cmd__types b { font: 600 .95rem var(--font-head); }
.cmd__types small { font-size: .74rem; color: var(--text-3); }
.cmd__console { position: relative; display: flex; flex-direction: column; min-width: 0; }
.cmd__bar { display: flex; gap: 10px; align-items: center; padding: 14px 20px; border-bottom: 1px solid var(--line); font-size: .76rem; color: var(--text-3); }
.cmd__dot { width: 8px; height: 8px; border-radius: 50%; background: var(--twin); box-shadow: 0 0 10px var(--twin); }
.cmd__bar #cmdTwin { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cmd__state { color: var(--ok); }
.cmd__state.is-busy { color: var(--ai); }
.cmd__body { padding: 22px 24px 76px; display: grid; gap: 16px; flex: 1; }
.cmd__visual { height: 150px; border-radius: 14px; background: radial-gradient(ellipse 60% 80% at 50% 60%, rgba(58,216,255,.08), transparent 70%), var(--bg); border: 1px solid var(--line); display: grid; place-items: center; overflow: hidden; }
.cmd__visual svg { height: 128px; width: auto; overflow: visible; }
.cmd__prompt { display: flex; gap: 12px; align-items: flex-start; padding: 14px 16px; border-radius: 12px; background: var(--surface); border: 1px solid var(--line-2); }
.cmd__you { flex: none; font-size: .66rem; letter-spacing: .1em; padding: 4px 7px; border-radius: 6px; background: var(--bg); color: var(--text-3); margin-top: 2px; }
.cmd__prompt p { margin: 0; font-size: 1rem; min-height: 1.6em; }
.cmd__prompt p .caret { display: inline-block; width: 8px; height: 1.05em; background: var(--twin); vertical-align: -2px; margin-left: 2px; animation: blink 1s steps(2) infinite; }
.cmd__progress { height: 3px; border-radius: 3px; background: var(--surface-2); overflow: hidden; }
.cmd__progress i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--twin), var(--ai)); }
.cmd__results { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.cmd__results li { padding: 12px 14px; border-radius: 12px; background: var(--surface); border: 1px solid var(--line); animation: msgin .4s ease both; }
.cmd__results span { display: block; font-size: .72rem; color: var(--text-3); margin-bottom: 4px; }
.cmd__results b { font: 500 1.1rem var(--font-mono); }
.cmd__results .good { color: var(--ok); } .cmd__results .warn { color: var(--warn); } .cmd__results .bad { color: var(--bad); }
.cmd__ai { padding: 14px 16px; border-radius: 12px; background: rgba(155,123,255,.07); border: 1px solid rgba(155,123,255,.25); opacity: 0; transition: opacity .4s; }
.cmd__ai.is-on { opacity: 1; }
.cmd__ai p { margin: 8px 0 0; color: var(--text-2); font-size: .93rem; }
.cmd__ai p a { color: var(--twin); }
.cmd__rerun { position: absolute; right: 20px; bottom: 18px; }

/* visual animations for command twins */
.v-line { fill: none; stroke: var(--twin); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.v-fill { fill: rgba(58,216,255,.08); stroke: var(--twin); stroke-width: 1.5; }
.v-hot { fill: var(--phys); filter: drop-shadow(0 0 6px var(--phys)); }
.v-ai { fill: var(--ai); filter: drop-shadow(0 0 6px var(--ai)); }
.is-running .v-anim-lift { animation: lift 1.4s ease-in-out infinite; transform-origin: 60px 60px; }
@keyframes lift { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }
.is-running .v-anim-bend { animation: bend 1.4s ease-in-out infinite; transform-origin: 60px 78px; }
@keyframes bend { 0%, 100% { transform: rotate(0); } 50% { transform: rotate(28deg); } }
.is-running .v-anim-piston { animation: piston .25s linear infinite alternate; }
@keyframes piston { to { transform: translateY(12px); } }
.is-running .v-anim-spin { animation: spin .6s linear infinite; transform-box: fill-box; transform-origin: center; }
.is-running .v-anim-road { animation: dash .4s linear infinite; }
.is-running .v-anim-pulse { animation: pulse-op .8s ease-in-out infinite; }
.is-running .v-anim-bubble { animation: bubble 1.2s ease-in infinite; }
@keyframes bubble { from { transform: translateY(0); opacity: 1; } to { transform: translateY(-30px); opacity: 0; } }
.is-running .v-anim-sway { animation: sway .35s ease-in-out infinite alternate; transform-origin: 60px 120px; }
@keyframes sway { from { transform: skewX(-3deg); } to { transform: skewX(3deg); } }

@media (max-width: 900px) {
  .cmd { grid-template-columns: 1fr; }
  .cmd__types { flex-direction: row; overflow-x: auto; border-right: 0; border-bottom: 1px solid var(--line); scrollbar-width: none; }
  .cmd__types::-webkit-scrollbar { display: none; }
  .cmd__types button { flex: none; }
  .cmd__types small { display: none; }
  .cmd__types button.is-active { box-shadow: inset 0 -3px 0 var(--ai); }
  .cmd__results { grid-template-columns: 1fr; }
  .cmd__body { padding: 18px 18px 76px; }
}

/* ---------- Stress-test lab ---------- */
.lab2 { display: grid; grid-template-columns: 1.25fr 1fr; border-radius: 22px; overflow: hidden; border: 1px solid var(--line-2); background: var(--surface); box-shadow: var(--shadow); }
.lab2__stage { position: relative; min-height: 560px; background: linear-gradient(180deg, #060a14 0%, #0a1222 70%, #120d0a 100%); border-right: 1px solid var(--line); min-width: 0; }
#stressCanvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.lab2__hud { position: absolute; left: 16px; top: 14px; display: grid; gap: 4px; font-size: .72rem; color: var(--text-3); }
.lab2__hud span:first-child { color: var(--twin); }
.lab2__status { position: absolute; right: 16px; top: 14px; font-size: .72rem; color: var(--ok); padding: 5px 9px; border-radius: 7px; background: rgba(4,6,12,.7); border: 1px solid var(--line-2); }
.lab2__status.is-busy { color: var(--ai); border-color: rgba(155,123,255,.4); }
.lab2__panel { padding: 26px; display: flex; flex-direction: column; gap: 20px; background: var(--bg-2); min-width: 0; }
.lab2__ask { display: flex; align-items: center; gap: 8px; padding: 6px 6px 6px 14px; border-radius: 14px; background: var(--bg); border: 1px solid rgba(155,123,255,.35); }
.lab2__ask:focus-within { border-color: var(--ai); box-shadow: 0 0 0 3px var(--ai-dim); }
.lab2__ask .spark { color: var(--ai); }
.lab2__ask input { flex: 1; min-width: 0; height: 38px; border: 0; background: transparent; color: var(--text); font: 400 .92rem var(--font-body); outline: none; }
.lab2__group { display: grid; gap: 8px; }
.lab2__label { font: .72rem var(--font-mono); text-transform: uppercase; letter-spacing: .1em; color: var(--text-3); }
.seg { display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px; padding: 4px; border-radius: 12px; background: var(--bg); border: 1px solid var(--line); }
.seg--wrap { grid-template-columns: 1fr 1fr; }
.seg button { padding: 9px 8px; border-radius: 9px; border: 0; background: transparent; color: var(--text-2); font: 500 .82rem/1.2 var(--font-body); cursor: pointer; transition: all .2s; }
.seg button:hover { color: var(--text); }
.seg button[aria-checked="true"] { background: var(--surface-2); color: var(--twin); box-shadow: inset 0 0 0 1px rgba(58,216,255,.4); }
.lab2__results { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.lab2__results div { padding: 10px 12px; border-radius: 10px; background: var(--surface); border: 1px solid var(--line); }
.lab2__results span { display: block; font-size: .7rem; color: var(--text-3); }
.lab2__results b { font-size: 1.02rem; font-weight: 500; }
.lab2__results .good { color: var(--ok); } .lab2__results .warn { color: var(--warn); } .lab2__results .bad { color: var(--bad); }
.lab2__ai { padding: 14px 16px; border-radius: 12px; background: rgba(155,123,255,.07); border: 1px solid rgba(155,123,255,.25); }
.lab2__ai p { margin: 8px 0 0; color: var(--text-2); font-size: .92rem; min-height: 3em; }
.lab2__ai strong { color: var(--text); }
.capture { list-style: none; padding: 0; margin: 48px 0 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.capture li { padding: 22px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); }
.capture__n { display: inline-block; font-size: .74rem; color: var(--phys); margin-bottom: 14px; }
.capture p { color: var(--text-2); font-size: .9rem; margin: 0; }
@media (max-width: 960px) {
  .lab2 { grid-template-columns: 1fr; }
  .lab2__stage { min-height: 440px; border-right: 0; border-bottom: 1px solid var(--line); }
  .capture { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .lab2__panel { padding: 18px; }
  .seg { grid-template-columns: 1fr 1fr; }
  .lab2__results { grid-template-columns: 1fr; }
  .capture { grid-template-columns: 1fr; }
}